Some standard content:
National Standard of the People's Republic of China
GB/T35644—2017
Specification for data acquisition of underground pipeline2017-12-29Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of ChinaStandardization Administration of the People's Republic of China
2018-07-01Implementation
Normative reference documents
Terms and definitions
Basic provisions
5 Technical preparation
General provisions
Data collection and analysis
On-site inspection
Instrument calibration and method test
Technical design preparation
Data acquisition
General provisions
Pipeline exploration
Pipeline measurement
Quality control
Data processing·
General provisions
Pipeline data file
Pipeline data table file
Pipeline graphic file·
Pipeline results preparation·
Quality control
Quality inspection and quality assessment
General provisions
Sample shooting
Content and method of quality inspection
Quality assessment
Preparation of inspection report
9 Acceptance and submission of results
Acceptance of results
Submission of results
Code, color and example of underground pipelines
Record A (normative record)
Appendix B (normative appendix)
Survey form for obvious pipeline points
GB/T3 5644—2D17
CB/T35644—2017
Appendix C (Informative Appendix)
Appendix D (Normative Appendix)
Appendix F (Informative Appendix)
Appendix I (Informative Appendix)
Appendix G (Informative Appendix)
Appendix H (Informative Appendix)
Appendix I (Informative Appendix)
Appendix G (Informative Appendix)
Appendix H (Informative Appendix)
Appendix I (Informative Appendix)
Appendix K (Normative Appendix)
Appendix L (Normative Appendix)
Appendix M (Normative Appendix)
Appendix N (Informative Appendix)
Appendix P ( Normative Appendix)
References
Pipeline ancillary facilities survey form
Profile pipeline point exploration record form
Pipeline point information structure·
Intelligent line information structure
Pipeline surface table structure·
Pipeline auxiliary point table structure·
Pipeline paving line table structure
Annotation information table structure
Pipeline data table layered table
Pipeline ancillary facilities symbols and legends
Pipeline line type examples and codes
Comprehensive pipeline drawing:
Pipeline cross-section drawing
Pipeline results table
This standard is based on the principles given in GB/T1.1-2009. This standard is proposed by the State Administration of Surveying, Mapping and Geoinformation. This standard is the National Technical Committee for Standardization of Geomatics and Geographic Information (SAC/TC230) GB/T35644-2D17. The drafting units of this standard are: National Bureau of Surveying, Mapping and Geographic Information Underground Pipeline Assisted Surveying Engineering Institute, Zhengyuan Geographic Information Co., Ltd., Nanjing Normal University, Wuhan Institute of Surveying and Mapping, Qingdao Institute of Surveying and Mapping. National Bureau of Surveying, Mapping and Geographic Information Surveying and Standardization Institute, Beijing Institute of Surveying and Mapping Design, Tianjin Institute of Surveying and Mapping, Guangzhou Urban Planning, Surveying and Design Institute, Chengdu Institute of Surveying and Mapping, Chengdu University of Technology, Baoding Jinchi Underground Pipeline Detection Engineering Co., Ltd., Wuhan Kedao Geographic Information Engineering Co., Ltd., Shandong Zhiyuan Geophysical Information Technology Co., Ltd., Xiamen Jingtu Information Technology Co., Ltd., Hebei Tianyuan Geographic Information Technology Engineering Co., Ltd., Sichuan Guoce Underground Air Information Technology Co., Ltd., Yuanchuan Provincial Measurement Product Quality Supervision and Inspection Station, China Electric Power Standardization Research Institute. The main contributors to this standard are: Zhang Yun, Chen Nan, Li Xuejun, Zhang Shuliang, Liu Chuanfeng, Wen Zheng, Li Sheng, Zhang Jing, Zhang Kun, Li Jingang, Zhu Nengfa, Wang Qingquan, Liu Jun, Jian Ji, Fu Qiang, Lu Guiqing, Li Weidong, Qiao Zhiyong, Sanyong, Deng Xiaoying, Huakan, Yang Xian, Ying Guowei, Wu Si. GB/T35644—2017
Underground pipeline data is an important geographic information data, which is the basis for realizing the integration of ground and underground geographic information data and improving the digital city and smart city data system. The underground pipeline data acquisition procedure is an important technical support for standardizing the acquisition of underground pipeline data. This standard card is based on the actual situation of technical preparation, data collection, data processing, quality inspection and quality assessment, and acceptance and submission of underground pipeline data.
1 Scope
Procedure for underground pipeline data acquisition
GB/T35644—2D17
This standard specifies the technical preparation, data collection, data processing, quality inspection and quality assessment, final acceptance and submission of underground pipeline data acquisition.
This standard is applicable to underground pipeline data of various metal, non-metallic pipes and cables, including pipeline engineering measurements. The data of ground and overhead pipelines can refer to this standard. 2 Normative referenced documents
The following documents are indispensable for the application of this document. For all referenced documents with a date, only the version with the date is applicable to this document. For all referenced documents without a date, the latest version (including all modifications) is applicable to this document. GB/T12838 National third and fourth grade leveling daytime specification GB/T18314 Global Positioning System (GIS) measurement specification GB/T18316-2008 Digital measurement results quality inspection and acceptance GB/T20257.1 National basic scale map diagram Part 1 1:5001:10301:2000 Topographic map diagram GB/T20257.2 GB/T1 20257.3
National basic scale map format Part 2 1:5000 1:100000 Topographic map format Part 3 1:2500 3 1:50000 1:100000 Topographic map National basic scale map format
GB/T24356-2009
3 Terms and definitions
Visual mapping results quality inspection and acceptance
The following terms and definitions apply to this document. 3.1
Underground pipeline data acquisition
data acquisition of underground pipeline The process of determining the spatial position, spatial relationship and properties of underground pipelines by methods such as mapping, field investigation, instrument exploration and measurement. 3.2
survey point of pipeline
In the process of obtaining pipeline data, the measuring points are set up to accurately describe the directional characteristics and accompanying design information of underground pipelines, which are divided into visible pipeline points and concealed pipeline points.
detection of pipeline
Pipeline exploration
The process of determining the projection position, depth, connection relationship and characteristics of underground pipelines on the ground by using methods such as property survey, field investigation and instrument exploration.
General survey of pipeline
The whole process of describing the status of pipelines, obtaining accurate pipeline-related data, compiling pipeline maps and establishing databases by taking economically reasonable methods according to the needs of planning, construction and management. 1
GB/T35644—2017
surveypointnumbernfundergroundpipelinegeophysical exploration point number
During the deep investigation of underground pipelines, in order to accurately describe the direction characteristics of the ground, pipelines and ancillary facilities information, temporary numbers of pipeline points are set up on the spot.
4 Basic provisions
4.1 The acquisition of underground pipeline data should adopt the 2000 National Geodetic Coordinate System and the 1985 National Elevation Datum. If a unique coordinate system and unique elevation system approved by law are used, a conversion relationship should be established with the 2000 National Geodetic Coordinate System and the 1985 National Elevation Datum. 4.2 The scale and division of underground pipelines or drawings should be consistent with the basic non-geophysical drawings. 4.3 The objects of underground pipeline data acquisition include underground power, telecommunications, water supply, drainage, gas, heat, industry, comprehensive pipeline corridors (trench) and other lines and pipelines (trench, corridor). 4.4 The basic contents of underground pipeline data acquisition include pipeline type, plane position, elevation, depth, specification, material, pressure (or voltage), flow, carrier characteristics, number of holes, accessories, installation mode, burial years, development units, road names and accessory specifications, etc. 4.5 The process of underground pipeline data acquisition generally includes technical preparation, data collection, data processing, quality inspection and evaluation, and result submission and archiving. The specific process is shown in Figure 1. Accepting the task
Data collection and analysis
On-site visitwwW.bzxz.Net
Instrument calibration and method test
Technical design
Field investigation
Instrument detection
Data processing
Technical preparation
Control recording
Pipeline point measurement
Result map creation
Quality inspection and quality evaluation
Result acceptance and submission
Data processing
Figure 1 Flow chart of underground pipeline data acquisition
4.6 Underground pipeline data collection and reporting All types of detection instruments in the department should be calibrated before use, and their detection accuracy should meet the accuracy requirements specified in 6.2.9.
4.7 The acquisition of underground pipeline data should actively adopt new technologies, new methods and new instruments, but they should meet the accuracy requirements of this standard. 4.8 The underground pipeline data processing software shall meet the technical requirements of the project and be verified. 4.9 The underground pipeline data acquisition results shall meet the requirements for establishing the underground pipeline data library. 4.10 This standard uses the mean error as an indicator to measure the detection accuracy and the inner mean error as the limit error GB/T35644-2D17
4.11 A quality management system shall be established for underground pipeline data acquisition work, and a "two-level inspection and one-level acceptance" inspection and acceptance system shall be implemented. 4.12 Underground pipeline data results shall be sorted and submitted according to the task requirements. Underground pipeline data acquisition work shall comply with the relevant provisions of national security confidentiality management and occupational health safety management. 4.13
5 Technical preparation
5.1 General provisions
5.1.1 Technical preparation shall be carried out for underground pipeline data acquisition. Technical preparation includes data collection and analysis, on-site inspection, instrument calibration and method testing, and preparation of technical design documents.
5.1.2 Underground pipeline data acquisition should collect, classify and organize the existing underground pipeline data, and compile underground pipeline status survey maps as a reference for underground pipeline data acquisition. 5.1.3 Underground pipeline data acquisition should conduct on-site investigations based on the results of data collection, verify the availability of the collected data, and preliminarily formulate exploration methods and technologies.
5.1.4 Underground pipeline data acquisition should conduct effectiveness tests on the proposed exploration methods and technologies based on the results of on-site investigations, determine the exploration methods and technologies to be used, and propose the exploration instruments and equipment to be used. 5.1.5 Underground pipeline data acquisition should be based on data collection and analysis, on-site investigations, and method tests, and a technical design document should be prepared and implemented after approval.
5.2 Data collection and analysis
5.2.1 Before the acquisition of underground pipeline data, the following data within the scope of pipeline data acquisition should be collected: a) The collection of plane and elevation control points and results; b)
Basic topographic map;
c) Pipeline design drawings, construction drawings, engineering drawings and related data 5.2.2 After the data collection is completed, the collected data should be analyzed. The main tasks are as follows: a) Analyze whether the starting base and density of control points meet the requirements of underground pipeline data acquisition, the reliability of the results, the degree of utilization, the preservation of the results and the change of point positions;
Determine whether the timeliness and accuracy of the basic topographic map meet the requirements of underground pipeline data acquisition; b)
Analyze and determine the reference usability of pipeline design drawings, construction drawings and completion drawings. c
Site survey
Site survey should include the following contents:
Verify the completeness, credibility and availability of collected data;a)
Verify the consistency between the obvious pipeline points on the survey map and the actual situation: verify the location and preservation status of the control points, and verify their accuracy;c)
Verify the currentness of the topographic map and the plane coordinate system and elevation benchmark;d
Check the terrain, landform, transportation, environment and underground pipeline distribution and layout within the scope of pipeline data acquisition, investigate the geophysical conditions on site and various possible interference factors
5.3.2 After the site survey is completed, the following work should be carried out:a) Mark the pipelines on the underground pipeline current survey map that are inconsistent with the actual situation;b) Record the preservation status of the control points and the changes in the point positions;3
GB/T35644—2017
Judge the availability of the topographic map:
Propose a test site for the proposed method.
5.4 Instrument calibration and method test
The method test should be carried out before underground pipeline exploration. 5.4.2 The method test can be carried out at the same time as the instrument inspection, and it should comply with the following provisions: a
The test site and test system should be representative and targeted; b)
The test should be carried out in the known pipeline section within the pipeline data acquisition range; c
The test should be carried out for underground pipelines of different types and different buried depths and different geophysical conditions; Different types and models of exploration instruments to be put into use should participate in the test; d
Through the verification and calibration evaluation of the test results, determine the effective exploration method and technical parameters, and write a method test report. The verification and calibration content should include the effectiveness of the exploration method on the instrument, the feasibility and effectiveness of the technical measures, and the reliability and accuracy of the exploration results.
5 Preparation of technical design
The data acquisition work of underground pipelines should be based on data collection and analysis, on-site investigation, instrument calibration and method testing. The content should include:
Project overview: explain the source of the task, the workday and tasks, workload, scope of work, content of work and completion deadline; Survey area overview: explain the working environment conditions and geophysical conditions; existing data collection and utilization;
Implementation standards, specifications or other technical documents: Working methods and technical implementation requirements;
Implementation team must comply with the schedule;
Quality basis, safety and confidentiality measures:
Results data to be submitted:
Related design diagrams,
Technical design documents and changes must be approved before implementation 6 Data collection
6.1 General provisions
When directly using existing results data, the adopted results data should be checked and evaluated and can only be used after passing the test. 6.1.2 Underground line data acquisition should be selected according to actual needs. The investigation should be carried out in accordance with the provisions of Table 1. Table 1 Underground pipeline data survey and collection standards
Main categories of pipelines
Long-distance transmission lines
Long-distance communication lines
Long-distance oil, gas,
Water transportation
China-US
High-pressure transmission lines
Land communication lines
Submarine optical cables
Oil pipelines
Natural gas pipelines
Water pipelines
Collection standards
Main categories of pipelines
Urban pipelines
Medium categories of pipelines
Comprehensive corridors (trenchways)
Table 1 (continued)
3 The classification of underground pipeline collection points and accessories should be carried out in accordance with Table 2 6.1.3
Selection and marking
Inner diameter ≥55mm
GB/T35644—2D17
Inner diameter ≥230mm or square ≥4c0mm×100mm full measurement
Table 2 Underground pipeline characteristic points and accessories table
Intelligent line type
High-speed transmission line
Land communication line
Submarine optical cable
Pu pipeline
Natural gas pipeline
Water main pipeline||tt| |Equipment collection point
Turning point, a pipeline point, etc.
Turning point, a pipeline point, etc.
Turning point, a pipeline battle point, etc.
Diameter change, ground, cover, elbow, one-way, turning point, general pipeline point, etc.
Diameter change, ground, cover, elbow, one-way, turning point, general pipeline point, etc.
Pressure measurement point, flow measurement point, water quality monitoring point, diameter change, ground, cover, elbow, tee, four-way, turning point, general terminal point, etc.
Turning point, branch point , reserved openings, non-census, general pipeline points, river points, internal points, etc.
Turning points, branch points, reserved openings, non-census, production, general pipeline points, side points, ten internal points, etc. Pressure measurement points, flow measurement points, water quality monitoring points, variable diameters, out of the ground, cover plugs, elbows, three-way, four-way, multi-suitable, quality reserved openings, non-sale inspection, people, a pipeline point, side points, and internal points, etc.
Variable diameters, since then, care points, one-way, four-way, multi-way, non-census, reserved openings, general pipeline points, opening points, opening points, legal side points, etc. | |tt||Change in diameter, mountain, cover and plug, test head, two-way, four-way, multi-way, non-census, households, general pipeline points, well points, well points, etc.
Chen belongings
Cold repair opening, substation, knife pressure station, upper pole, etc., manhole, exchange station, upper pole, etc.
Man, manhole, exchange station, upper pole, etc.
Reading door well, inspection opening, valve pressure gauge, negative carbon test abandonment, etc. Min door opening, inspection well, valve, pressure gauge, negative break test, etc. Inspection opening, flash door opening, water source opening, exhaust valve, sewage Valves, pump stations, valves, water inlets, water outlets, sedimentation tanks, etc. substations, distribution rooms, transformers, manholes, holes, ventilation shafts, junction boxes, street light control boxes, street lights, traffic lights, poles, billboards, upper poles, etc.
manholes, handholes, junction boxes, telephone booths, monitors, radio poles, differential transfer tables, sending points, switching stations, poles, etc.
cold repair opening, valve wells, fire wells, water meter opening, water source rising, exhaust valve card sewage valve, water tower, water meter, water filter, valve hole, pump station, fire hydrant, valve water inlet , outflow sedimentation, etc.
Sewage well, rainwater well, rain grate. Sewage, overflow, Minmen well, waterfall well, ventilation well, flushing well, sedimentation well, seepage card, Lan well, water seal well, drainage pump station, septic tank, purification tank, water inlet, water outlet, valves, etc.
Wenmen well, dangerous well, valve, pressure suit, negative suction test pile, corrugated pipe, condensate cylinder, pressure regulating box, pressure regulating station, gas cabinet, gas certificate, steel expansion station, etc.
CB/T35644—2017
Pipeline types|| tt||Comprehensive pipeline corridor (ditch)
Feature points
Table 2 (continued)
Change in diameter, ground, blue plug, elbow, tee, four-way, multi-way, pre-I1, non-census, household one-axillary pipeline point well edge point, well point, etc.
Change in diameter, mountain, cover plug, elbow, one-way, four-way, multi-way pre-opening non-census, household general pipeline point and edge point, open point, etc.
Change in diameter ground, please, four-way, multi-way, reserved opening non-census, general pipeline point, ≠ edge point, well opening, etc.||t t||Maintenance switches, reading doors, purge switches, valves, pressure regulating devices, drains, vacuum gauges, light fixtures, safety valves, tide holes, heat exchanger and other maintenance switches, sewage devices, power stations, valves and other maintenance switches, personnel and material non-gas devices in ventilation plants, etc. Note: The three major lines (national defense), railways, civil aviation and specific professional answer lines feature points and the property table shall refer to the provisions of this table for implementation, but the affiliated units 6.1.4 The obvious pipeline points shall be investigated by field investigation and measurement to obtain relevant properties, and the concealed pipeline points shall be explored by geophysical exploration methods to obtain relevant properties.
6.1.5 Pipeline points should be set at the projection position of pipeline feature points and ancillary facilities on the ground. The marking surface should be level with the ground and easy to preserve. Line points that are not easy to mark on the ground should be located at the actual point and a point map should be drawn. 6.1.6 On the straight section of the pipeline, the distance between pipeline points should not be greater than 15cm on the map; on the curved section of the pipeline, when the pipeline connection line deviates from the actual position of the pipeline by C2m, the setting of pipeline points should be appropriately increased, and the pipeline bend should be reflected. 6.1.7 The numbering of pipeline points should consist of pipeline code and serial number, and consistency should be ensured. The pipeline code shall be implemented in accordance with the provisions of Appendix A.
6.1.8 Pipeline measurement should be effectively connected with the exploration work, and implemented based on the results of exploration sketches, survey forms, etc. 6.1.9 When exploring the pipeline, it is advisable to record it on site in a timely manner. The recording method can be electronic. When using an electronic notebook to record underground pipeline data, data backup should be done in a timely manner.
6.2 Pipeline Exploration
6.2.1 The types, materials, pressure (or voltage), load characteristics, power distribution and burial age of underground pipelines can be obtained through the collected pipeline data
6.2.2 Underground pipelines should be investigated on the spot to collect inherent attribute information of the pipelines, and the adjustment items should be determined according to actual needs. The survey should be carried out in accordance with the provisions of Table 3.
Field Investigation Items of Underground Pipelines
Replacement Line Type
High Voltage Wire
Land and Pool Communication Line
Submarine Optical Fiber
Oil Pipeline
Natural Gas Main Pipeline
Water Main Pipeline
Sectional Size
Pipe Diameter
Carrier Characteristics
Line Type
Integrated Pipe Gallery
(Trench)
Note 1.△ is an item to be investigated.
Sectional dimensions
Table 3 (continued)
GB/T35644—2D17
Carrier characteristics
Note 2: The installation method of high-voltage transmission lines, land communication lines, submarine optical cables, power, and telecommunications is pipe blocks. When in trenches, the minimum cross-sectional dimensions are width × height. When in management, the cross-sectional dimensions are pipe diameters. When in vertical management, the cross-sectional dimensions are not adjusted. For water mains and drainage, the installation method is to install the cross-sectional dimensions in trenches as width × height. When buried, the pipe diameter is not adjusted.
Note 3: When the installation method of high-voltage transmission lines, land communication lines, submarine optical cables, power, and telecommunications is pipe blocks, the number of holes needs to be adjusted. Note 4: The design mode of high-voltage power lines, land communication lines, submarine optical cables, power and telecommunications is pipe blocks. When purchasing cables, it is necessary to investigate the number of cable services. Note 5: The design mode of high-voltage power lines, land communication lines, submarine optical cables, power and telecommunications is pipe blocks. When purchasing cables, it is necessary to investigate the number of protective materials. 6.2.3 Various types of well workers set up obvious pipeline points. The pipeline point mark should be at the geometric center of the manhole cover. When the ground projection of the underground pipeline deviates from the center of the manhole cover by more than 0.2m, the pipeline point should be set at the projection position of the pipeline on the ground. The manhole cover is treated as a pipeline property. When the underground riser exceeds 2m×2m or the line extension line deviates from the center of the riser cover by more than 0.2m, there will be no pipeline point on the left and right. The pipeline point accessory property information is recorded as the riser. At the same time, the opening point is measured, the cover is opened, and the cover is stored in the database as a supporting point. 6.2.2 The cross-sectional dimensions of underground pipelines and comprehensive pipe corridors (including pipe trenches) are measured. The inner diameter of H is measured for circular sections, and the inner wall of H is measured for rectangular sections. Special sections should be measured with approximate sections, and the unit is expressed in millimeters (mm). 6.2.5 For underground pipes, other power, lunar, drainage, and integrated pipe corridors (ditches), the characteristic points of pipelines with a width of more than 1m are located at the common geometric center position, and the edge of the ditch should be represented by the line projection in the pipeline diagram. 6.2.6 The investigation of obvious pipeline points should be recorded in accordance with the requirements of Appendix B. 6.2. When the underground pipeline needs to be maintained and modeled, the detailed specifications, textures and other information of various pipeline facilities should be investigated in detail, and recorded with reference to the requirements of the appendix.
6.2.8 The exploration of underground pipelines should follow the principle of going from known to technical knowledge, from point to line, from line to surface, from simple to complex, and not giving up doubts easily.
Pipeline point detection tolerances meet the following requirements: When the buried depth of an obvious pipeline point can be directly measured, its measurement tolerance shall not be greater than 5M. If it cannot be directly measured, measures should be taken to ensure that a)
The measurement accuracy of the buried depth meets the actual needs. b)
The plane position positioning tolerance of concealed pipeline points shall not exceed 0.10h, and the buried depth detection tolerance shall not exceed 0.15h, where h is the buried depth of the center of the underground pipeline. When h1m, 1m is substituted into the calculation. Under special circumstances, the underground pipeline data acquisition accuracy can be agreed upon separately.
6.2.10 Underground pipeline detection should select simple and effective geophysical exploration methods based on the requirements of the project, the exploration object and the geophysical conditions. It is recommended to meet 710. The exploration of underground pipelines should be based on the requirements of the project, the exploration object and the geophysical conditions, and a simple and effective geophysical exploration method should be selected.10. The exploration of underground pipelines should be based on the requirements of the project, the exploration object and the geophysical conditions, and a simple and effective geophysical exploration method should be selected.Sewage, overflow force, gate well, waterfall well, ventilation well, flushing well, siltation force, seepage card, outlet well, water seal, drainage pump station, septic tank, purification tank, water inlet, outlet, valves, etc.
Gate well, dangerous well, valve, pressure suit, suction test pile, corrugated pipe, condensate cylinder, pressure regulating box, pressure regulating station, gas cabinet, gas certificate, steel expansion station, etc.
CB/T35644—2017
Pipeline type
Comprehensive platform pipeline corridor (ditch)
Feature point
Table 2 (continued)
Change diameter, ground, plug, elbow, tee, four-way, multi-way, pre-I1, non-census, household one-axillary pipeline point wellside point, well point, etc.
Change diameter, mountain, cover plug, elbow , one-way, four-way, multi-way reserved openings, non-survey, general pipeline points, edge points, opening points, etc.
change diameter, please, four-way, multi-way, reserved openings, non-survey, general pipeline points, ≠ edge points, well openings and other hidden objects
maintenance openings, door openings, purge openings, valves, pressure regulating devices, drains, vacuum gauges, solid light joints, safety valves, tide holes, negative heat station and other maintenance openings, sewage devices, power stations, valves and other maintenance openings, people, materials 1. Ventilation plant non-gas devices, etc. Note: Sanchuan (national defense), railways, civil aviation and specific professional answers to the line characteristic point rental object table shall refer to the provisions of this table for implementation, but the unit 6.1.4 obvious pipeline point investigation shall be carried out through field investigation and measurement to obtain relevant attributes, and hidden pipeline point exploration shall be carried out through plant geophysical exploration methods to obtain relevant attributes.
6.1.5 Pipeline points should be set at the projection position of pipeline feature points and ancillary facilities on the ground. The marking surface should be level with the ground and easy to preserve. Line points that are not easy to mark on the ground should be located at the actual point and a point map should be drawn. 6.1.6 On the straight section of the pipeline, the distance between pipeline points should not be greater than 15cm on the map; on the curved section of the pipeline, when the pipeline connection line deviates from the actual position of the pipeline by C2m, the setting of pipeline points should be appropriately increased, and the pipeline bend should be reflected. 6.1.7 The numbering of pipeline points should consist of pipeline code and serial number, and consistency should be ensured. The pipeline code shall be implemented in accordance with the provisions of Appendix A.
6.1.8 Pipeline measurement should be effectively connected with the exploration work, and implemented based on the results of exploration sketches, survey forms, etc. 6.1.9 When exploring the pipeline, it is advisable to record it on site in a timely manner. The recording method can be electronic. When using an electronic notebook to record underground pipeline data, data backup should be done in a timely manner.
6.2 Pipeline Exploration
6.2.1 The types, materials, pressure (or voltage), load characteristics, power distribution and burial age of underground pipelines can be obtained through the collected pipeline data
6.2.2 Underground pipelines should be investigated on the spot to collect inherent attribute information of the pipelines, and the adjustment items should be determined according to actual needs. The survey should be carried out in accordance with the provisions of Table 3.
Field Investigation Items of Underground Pipelines
Replacement Line Type
High Voltage Wire
Land and Pool Communication Line
Submarine Optical Fiber
Oil Pipeline
Natural Gas Main Pipeline
Water Main Pipeline
Sectional Size
Pipe Diameter
Carrier Characteristics
Line Type
Integrated Pipe Gallery
(Trench)
Note 1.△ is an item to be investigated.
Sectional dimensions
Table 3 (continued)
GB/T35644—2D17
Carrier characteristics
Note 2: The installation method of high-voltage transmission lines, land communication lines, submarine optical cables, power, and telecommunications is pipe blocks. When in trenches, the minimum cross-sectional dimensions are width × height. When in management, the cross-sectional dimensions are pipe diameters. When in vertical management, the cross-sectional dimensions are not adjusted. For water mains and drainage, the installation method is to install the cross-sectional dimensions in trenches as width × height. When buried, the pipe diameter is not adjusted.
Note 3: When the installation method of high-voltage transmission lines, land communication lines, submarine optical cables, power, and telecommunications is pipe blocks, the number of holes needs to be adjusted. Note 4: The design mode of high-voltage power lines, land communication lines, submarine optical cables, power and telecommunications is pipe blocks. When purchasing cables, it is necessary to investigate the number of cable services. Note 5: The design mode of high-voltage power lines, land communication lines, submarine optical cables, power and telecommunications is pipe blocks. When purchasing cables, it is necessary to investigate the number of protective materials. 6.2.3 Various types of well workers set up obvious pipeline points. The pipeline point mark should be at the geometric center of the manhole cover. When the ground projection of the underground pipeline deviates from the center of the manhole cover by more than 0.2m, the pipeline point should be set at the projection position of the pipeline on the ground. The manhole cover is treated as a pipeline property. When the underground riser exceeds 2m×2m or the line extension line deviates from the center of the riser cover by more than 0.2m, there will be no pipeline point on the left and right. The pipeline point accessory property information is recorded as the riser. At the same time, the opening point is measured, the cover is opened, and the cover is stored in the database as a supporting point. 6.2.2 The cross-sectional dimensions of underground pipelines and comprehensive pipe corridors (including pipe trenches) are measured. The inner diameter of H is measured for circular sections, and the inner wall of H is measured for rectangular sections. Special sections should be measured with approximate sections, and the unit is expressed in millimeters (mm). 6.2.5 For underground pipes, other power, lunar, drainage, and integrated pipe corridors (ditches), the characteristic points of pipelines with a width of more than 1m are located at the common geometric center position, and the edge of the ditch should be represented by the line projection in the pipeline diagram. 6.2.6 The investigation of obvious pipeline points should be recorded in accordance with the requirements of Appendix B. 6.2. When the underground pipeline needs to be maintained and modeled, the detailed specifications, textures and other information of various pipeline facilities should be investigated in detail, and recorded with reference to the requirements of the appendix.
6.2.8 The exploration of underground pipelines should follow the principle of going from known to technical knowledge, from point to line, from line to surface, from simple to complex, and not giving up doubts easily.
Pipeline point detection tolerances meet the following requirements: When the buried depth of an obvious pipeline point can be directly measured, its measurement tolerance shall not be greater than 5M. If it cannot be directly measured, measures should be taken to ensure that a)
The measurement accuracy of the buried depth meets the actual needs. b)
The plane position positioning tolerance of concealed pipeline points shall not exceed 0.10h, and the buried depth detection tolerance shall not exceed 0.15h, where h is the buried depth of the center of the underground pipeline. When h1m, 1m is substituted into the calculation. Under special circumstances, the underground pipeline data acquisition accuracy can be agreed upon separately.
6.2.10 Underground pipeline detection should select simple and effective geophysical methods based on the requirements of the project, the detection object and the geophysical conditions. It is recommended to meet 7Sewage, overflow force, gate well, waterfall well, ventilation well, flushing well, siltation force, seepage card, outlet well, water seal, drainage pump station, septic tank, purification tank, water inlet, outlet, valves, etc.
Gate well, dangerous well, valve, pressure suit, suction test pile, corrugated pipe, condensate cylinder, pressure regulating box, pressure regulating station, gas cabinet, gas certificate, steel expansion station, etc.
CB/T35644—2017
Pipeline type
Comprehensive platform pipeline corridor (ditch)
Feature point
Table 2 (continued)
Change diameter, ground, plug, elbow, tee, four-way, multi-way, pre-I1, non-census, household one-axillary pipeline point wellside point, well point, etc.
Change diameter, mountain, cover plug, elbow , one-way, four-way, multi-way reserved openings, non-survey, general pipeline points, edge points, opening points, etc.
change diameter, please, four-way, multi-way, reserved openings, non-survey, general pipeline points, ≠ edge points, well openings and other hidden objects
maintenance openings, door openings, purge openings, valves, pressure regulating devices, drains, vacuum gauges, solid light joints, safety valves, tide holes, negative heat station and other maintenance openings, sewage devices, power stations, valves and other maintenance openings, people, materials 1. Ventilation plant non-gas devices, etc. Note: Sanchuan (national defense), railways, civil aviation and specific professional answers to the line characteristic point rental object table shall refer to the provisions of this table for implementation, but the unit 6.1.4 obvious pipeline point investigation shall be carried out through field investigation and measurement to obtain relevant attributes, and hidden pipeline point exploration shall be carried out through plant geophysical exploration methods to obtain relevant attributes.
6.1.5 Pipeline points should be set at the projection position of pipeline feature points and ancillary facilities on the ground. The marking surface should be level with the ground and easy to preserve. Line points that are not easy to mark on the ground should be located at the actual point and a point map should be drawn. 6.1.6 On the straight section of the pipeline, the distance between pipeline points should not be greater than 15cm on the map; on the curved section of the pipeline, when the pipeline connection line deviates from the actual position of the pipeline by C2m, the setting of pipeline points should be appropriately increased, and the pipeline bend should be reflected. 6.1.7 The numbering of pipeline points should consist of pipeline code and serial number, and consistency should be ensured. The pipeline code shall be implemented in accordance with the provisions of Appendix A.
6.1.8 Pipeline measurement should be effectively connected with the exploration work, and implemented based on the results of exploration sketches, survey forms, etc. 6.1.9 When exploring the pipeline, it is advisable to record it on site in a timely manner. The recording method can be electronic. When using an electronic notebook to record underground pipeline data, data backup should be done in a timely manner.
6.2 Pipeline Exploration
6.2.1 The types, materials, pressure (or voltage), load characteristics, power distribution and burial age of underground pipelines can be obtained through the collected pipeline data
6.2.2 Underground pipelines should be investigated on the spot to collect inherent attribute information of the pipelines, and the adjustment items should be determined according to actual needs. The survey should be carried out in accordance with the provisions of Table 3.
Field Investigation Items of Underground Pipelines
Replacement Line Type
High Voltage Wire
Land and Pool Communication Line
Submarine Optical Fiber
Oil Pipeline
Natural Gas Main Pipeline
Water Main Pipeline
Sectional Size
Pipe Diameter
Carrier Characteristics
Line Type
Integrated Pipe Gallery
(Trench)
Note 1.△ is an item to be investigated.
Sectional dimensions
Table 3 (continued)
GB/T35644—2D17
Carrier characteristics
Note 2: The installation method of high-voltage transmission lines, land communication lines, submarine optical cables, power, and telecommunications is pipe blocks. When in trenches, the minimum cross-sectional dimensions are width × height. When in management, the cross-sectional dimensions are pipe diameters. When in vertical management, the cross-sectional dimensions are not adjusted. For water mains and drainage, the installation method is to install the cross-sectional dimensions in trenches as width × height. When buried, the pipe diameter is not adjusted.
Note 3: When the installation method of high-voltage transmission lines, land communication lines, submarine optical cables, power, and telecommunications is pipe blocks, the number of holes needs to be adjusted. Note 4: The design mode of high-voltage power lines, land communication lines, submarine optical cables, power and telecommunications is pipe blocks. When purchasing cables, it is necessary to investigate the number of cable services. Note 5: The design mode of high-voltage power lines, land communication lines, submarine optical cables, power and telecommunications is pipe blocks. When purchasing cables, it is necessary to investigate the number of protective materials. 6.2.3 Various types of well workers set up obvious pipeline points. The pipeline point mark should be at the geometric center of the manhole cover. When the ground projection of the underground pipeline deviates from the center of the manhole cover by more than 0.2m, the pipeline point should be set at the projection position of the pipeline on the ground. The manhole cover is treated as a pipeline property. When the underground riser exceeds 2m×2m or the line extension line deviates from the center of the riser cover by more than 0.2m, there will be no pipeline point on the left and right. The pipeline point accessory property information is recorded as the riser. At the same time, the opening point is measured, the cover is opened, and the cover is stored in the database as a supporting point. 6.2.2 The cross-sectional dimensions of underground pipelines and comprehensive pipe corridors (including pipe trenches) are measured. The inner diameter of H is measured for circular sections, and the inner wall of H is measured for rectangular sections. Special sections should be measured with approximate sections, and the unit is expressed in millimeters (mm). 6.2.5 For underground pipes, other power, lunar, drainage, and integrated pipe corridors (ditches), the characteristic points of pipelines with a width of more than 1m are located at the common geometric center position, and the edge of the ditch should be represented by the line projection in the pipeline diagram. 6.2.6 The investigation of obvious pipeline points should be recorded in accordance with the requirements of Appendix B. 6.2. When the underground pipeline needs to be maintained and modeled, the detailed specifications, textures and other information of various pipeline facilities should be investigated in detail, and recorded with reference to the requirements of the appendix.
6.2.8 The exploration of underground pipelines should follow the principle of going from known to technical knowledge, from point to line, from line to surface, from simple to complex, and not giving up doubts easily.
Pipeline point detection tolerances meet the following requirements: When the buried depth of an obvious pipeline point can be directly measured, its measurement tolerance shall not be greater than 5M. If it cannot be directly measured, measures should be taken to ensure that a)
The measurement accuracy of the buried depth meets the actual needs. b)
The plane position positioning tolerance of concealed pipeline points shall not exceed 0.10h, and the buried depth detection tolerance shall not exceed 0.15h, where h is the buried depth of the center of the underground pipeline. When h1m, 1m is substituted into the calculation. Under special circumstances, the underground pipeline data acquisition accuracy can be agreed upon separately.
6.2.10 Underground pipeline detection should select simple and effective geophysical exploration methods based on the requirements of the project, the exploration object and the geophysical conditions. It is recommended to meet 7△ is the item to be investigated.
Sectional dimensions
Table 3 (continued)
GB/T35644—2D17
Carrier characteristics
Note 2: The installation method of high-voltage transmission lines, land communication lines, submarine optical cables, power, and telecommunications is pipe blocks. When in trenches, the minimum cross-sectional dimensions are investigated as width × height. When in management, the cross-sectional dimensions are investigated as pipe diameter. When in direct management, the cross-sectional dimensions are not adjusted. For water mains and drainage, the installation method is to investigate the cross-sectional dimensions under trenches as width × height. When buried, the pipe diameter is not adjusted.
Note 3: When the installation method of high-voltage transmission lines, land communication lines, submarine optical cables, power, and telecommunications is pipe blocks, the number of holes needs to be adjusted. Note 4: The design mode of high-voltage power lines, land communication lines, submarine optical cables, power and telecommunications is pipe blocks. When purchasing cables, it is necessary to investigate the number of cable services. Note 5: The design mode of high-voltage power lines, land communication lines, submarine optical cables, power and telecommunications is pipe blocks. When purchasing cables, it is necessary to investigate the number of protective materials. 6.2.3 Various types of well workers set up obvious pipeline points. The pipeline point mark should be at the geometric center of the manhole cover. When the ground projection of the underground pipeline deviates from the center of the manhole cover by more than 0.2m, the pipeline point should be set at the projection position of the pipeline on the ground. The manhole cover is treated as a pipeline property. When the underground riser exceeds 2m×2m or the line extension line deviates from the center of the riser cover by more than 0.2m, there will be no pipeline point on the left and right. The pipeline point accessory property information is recorded as the riser. At the same time, the opening point is measured, the cover is opened, and the cover is stored in the database as a supporting point. 6.2.2 The cross-sectional dimensions of underground pipelines and comprehensive pipe corridors (including pipe trenches) are measured. The inner diameter of H is measured for circular sections, and the inner wall of H is measured for rectangular sections. Special sections should be measured with approximate sections, and the unit is expressed in millimeters (mm). 6.2.5 For underground pipes, other power, lunar, drainage, and integrated pipe corridors (ditches), the characteristic points of pipelines with a width of more than 1m are located at the common geometric center position, and the edge of the ditch should be represented by the line projection in the pipeline diagram. 6.2.6 The investigation of obvious pipeline points should be recorded in accordance with the requirements of Appendix B. 6.2. When the underground pipeline needs to be maintained and modeled, the detailed specifications, textures and other information of various pipeline facilities should be investigated in detail, and recorded with reference to the requirements of the appendix.
6.2.8 The exploration of underground pipelines should follow the principle of going from known to technical knowledge, from point to line, from line to surface, from simple to complex, and not giving up doubts easily.
Pipeline point detection tolerances meet the following requirements: When the buried depth of an obvious pipeline point can be directly measured, its measurement tolerance shall not be greater than 5M. If it cannot be directly measured, measures should be taken to ensure that a)
The measurement accuracy of the buried depth meets the actual needs. b)
The plane position positioning tolerance of concealed pipeline points shall not exceed 0.10h, and the buried depth detection tolerance shall not exceed 0.15h, where h is the buried depth of the center of the underground pipeline. When h1m, 1m is substituted into the calculation. Under special circumstances, the underground pipeline data acquisition accuracy can be agreed upon separately.
6.2.10 Underground pipeline detection should select simple and effective geophysical exploration methods based on the requirements of the project, the exploration object and the geophysical conditions. It is recommended to meet 7△ is the item to be investigated.
Sectional dimensions
Table 3 (continued)
GB/T35644—2D17
Carrier characteristics
Note 2: The installation method of high-voltage transmission lines, land communication lines, submarine optical cables, power, and telecommunications is pipe blocks. When in trenches, the minimum cross-sectional dimensions are investigated as width × height. When in management, the cross-sectional dimensions are investigated as pipe diameter. When in direct management, the cross-sectional dimensions are not adjusted. For water mains and drainage, the installation method is to investigate the cross-sectional dimensions under trenches as width × height. When buried, the pipe diameter is not adjusted.
Note 3: When the installation method of high-voltage transmission lines, land communication lines, submarine optical cables, power, and telecommunications is pipe blocks, the number of holes needs to be adjusted. Note 4: The design mode of high-voltage power lines, land communication lines, submarine optical cables, power and telecommunications is pipe blocks. When purchasing cables, it is necessary to investigate the number of cable services. Note 5: The design mode of high-voltage power lines, land communication lines, submarine optical cables, power and telecommunications is pipe blocks. When purchasing cables, it is necessary to investigate the number of protective materials. 6.2.3 Various types of well workers set up obvious pipeline points. The pipeline point mark should be at the geometric center of the manhole cover. When the ground projection of the underground pipeline deviates from the center of the manhole cover by more than 0.2m, the pipeline point should be set at the projection position of the pipeline on the ground. The manhole cover is treated as a pipeline property. When the underground riser exceeds 2m×2m or the line extension line deviates from the center of the riser cover by more than 0.2m, there will be no pipeline point on the left and right. The pipeline point accessory property information is recorded as the riser. At the same time, the opening point is measured, the cover is opened, and the cover is stored in the database as a supporting point. 6.2.2 The cross-sectional dimensions of underground pipelines and comprehensive pipe corridors (including pipe trenches) are measured. The inner diameter of H is measured for circular sections, and the inner wall of H is measured for rectangular sections. Special sections should be measured with approximate sections, and the unit is expressed in millimeters (mm). 6.2.5 For underground pipes, other power, lunar, drainage, and integrated pipe corridors (ditches), the characteristic points of pipelines with a width of more than 1m are located at the common geometric center position, and the edge of the ditch should be represented by the line projection in the pipeline diagram. 6.2.6 The investigation of obvious pipeline points should be recorded in accordance with the requirements of Appendix B. 6.2. When the underground pipeline needs to be maintained and modeled, the detailed specifications, textures and other information of various pipeline facilities should be investigated in detail, and recorded with reference to the requirements of the appendix.
6.2.8 The exploration of underground pipelines should follow the principle of going from known to technical knowledge, from point to line, from line to surface, from simple to complex, and not giving up doubts easily.
Pipeline point detection tolerances meet the following requirements: When the buried depth of an obvious pipeline point can be directly measured, its measurement tolerance shall not be greater than 5M. If it cannot be directly measured, measures should be taken to ensure that a)
The measurement accuracy of the buried depth meets the actual needs. b)
The plane position positioning tolerance of concealed pipeline points shall not exceed 0.10h, and the buried depth detection tolerance shall not exceed 0.15h, where h is the buried depth of the center of the underground pipeline. When h1m, 1m is substituted into the calculation. Under special circumstances, the underground pipeline data acquisition accuracy can be agreed upon separately.
6.2.10 Underground pipeline detection should select simple and effective geophysical methods based on the requirements of the project, the detection object and the geophysical conditions. It is recommended to meet 7
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