SY/T 4101-1995 Technical specification for beach and sea geotechnical engineering investigation
Some standard content:
Technical specification of geotechnical investigation in beach-shallow sea SYT 4101-95
Editor: Survey and Design Institute of Liaohe Petroleum Exploration Bureau Approval department: Petroleum Industry Press of China National Petroleum Corporation
Beijing, 1996
Main symbols
Basic technical requirements for engineering survey of beach-shallow sea
General specifications
Geotechnical engineering survey classification
Site selection assistance
Preliminary survey
Detailed survey
Implementation survey
Key points of various geotechnical engineering technologies
Marine engineering
Pile foundation engineering
Engineering geological adjustment,
Work Engineering geological survey
In-situ test
Engineering geophysical prospecting
Exploration and testing
Engineering properties of rock and soil
Evaluation of engineering geological conditions
Site conditions
Bearing capacity and morphology of foundation
Salt disposal
On-site inspection and monitoring
(12)
(14)
(16)
(19)
(19)
(23)
(25)
(29)
8 Liquefaction of the earth
Sites and foundations in strong earthquake zones
Vibration liquefaction on saturated sand powder
Geotechnical engineering analysis and results report
Analysis and selection of non-parameters
Basic requirements for results report
Appendix A
Appendix B
Appendix C
Appendix D
Appendix E
Soil classification
Empirical formula for vertical bearing capacity of single pile
Empirical value of density (specific gravity) of upper granular cypress
Empirical value of Poisson's ratio of soil
Terms used in this specification
Additional explanation||tt| |Current Standards for Beach and Sea Rock Engineering Survey Technology
Article Explanation
(41)
(48)
Document of China National Petroleum Corporation
(95) CNPC Technical Supervision No. 731
Notice on the Approval and Release of 26 Oil and Gas Industry Standards Including "Standards for Investigation Methods for Corrosion and Protection of Steel Pipelines and Storage Tanks"
To all relevant units:
"Standards for Investigation Methods for Corrosion and Protection of Steel Pipelines and Storage Tanks" and other 28 oil and gas industry standards (draft) have been reviewed and approved and are now approved as oil and gas industry standards and are hereby released. The numbers and names of the standards are as follows: 1
SYT 008795
SY/T 05451995
SY/ T 4013
SY/T 4041-95
Standard for investigation method of corrosion and protection of steel pipelines and storage tanks
Determination of thermal characteristic parameters of wax precipitation in crude oil
Scanning calorimetry
Technical standard for polyethylene anticorrosion layer of buried steel pipeline (replaces SYJ4013--87)
Installation and acceptance specification for special wet steam generator for oil field (replaces SYJ4041-89)
SYT 4084-95
SY /T 4085- 95
SYI 4086-95
SYI 4087- -95
SY /T 4088- 95
SY/T 4089-95
SYT 4090 -95
SY/T 4091 -95
SY7 F 4092- 95
SY/T 4093—95
SYT 4094-95
SY/T 4095 -95
SY7T 4096 -95
SY T 4097 -95
SY T 4098-- 95
SY/T 4099 -95
SY/T 4100 -95
SYT 4101 -95
SY7 F 4102- 95
SY/T4103-1995
SY 4104- 95
Technical specification for environmental conditions and loads in coastal areas
Technical specification for oil and gas gathering and transportation in coastal oil mountains
Technical specification for design and construction of pipeline network on coastal structures
Technical specification for ventilation and air conditioning of Weihai oil project Technical specification for water supply and drainage of Weihai oil project Electrical specification of Weihai oil project
Technical specification for power generation facilities of coastal oil project Anti-corrosion technical specification of coastal oil project
Technical specification for thermal insulation of coastal oil project
Technical specification for selection and installation of cranes on coastal oil facilities
Technical specification for design and construction of shallow-water steel fixed platform structure
Shallow-water Technical specification for structural design and construction of steel mobile platform
Technical specification for protection device of Weihai oil wellhead
Technical specification for structural design and construction of sloping sandstone artificial island in beach sea
Technical specification for structural design and construction of ring-wall steel formwork-concrete Tiangong Island in Yahai
Technical specification for design and construction of Yahai reservoir
Technical specification for plant survey in beach sea
Technical specification for geotechnical engineering investigation in beach sea
Specification for inspection and installation of valves
Welding and acceptance of steel pipelines
Quality inspection and assessment standard for petroleum construction projects
SYF 008895
Technical standard for cathodic protection of outer wall of bottom of steel storage tank
The above standards shall come into force on June 1996. China National Petroleum and Natural Gas Corporation
December 18, 1995
1.0.1 In order to standardize the geotechnical engineering investigation in coastal areas, to ensure safety, reliability, technical excellence, economy and practicality, environmental protection, and to ensure the safety and normal use of coastal structures, this specification is specially formulated.
1.0.2 This specification is applicable to the geotechnical engineering investigation of the site and foundation of coastal structures.
1.3 Geotechnical engineering investigation in coastal areas must be carried out in accordance with the characteristics of local projects and coastal areas, with reasonable arrangements for investigation work, correct evaluation of the engineering geological conditions of the structure site and foundation, and a foundation scheme and geotechnical engineering investigation report that are technologically advanced, economically reasonable, safe and applicable, and feasible in combination with local experience: 1.0.4 For important structures and foundations with special requirements or structures that have an impact on the environment, monitoring should be carried out during construction and use according to the needs of engineering construction. 1.0.5 Reference standards:
GB50021—94 Geotechnical Engineering Investigation Code
GB5019193 Code for Seismic Design of Structures
GBJ 7-89
GBJ 1189
Code for Design of Building Foundations
Code for Seismic Design of Buildings
GBJ 123—88
JGJ 4-80
JGJ 83-91
JGJ 94-- 94
TJ 21—77
Standard for geotechnical test methods
Design and construction specifications for cast-in-place pile foundations for industrial and civil buildings Specification for engineering geological survey in soft soil areas
Technical specifications for building pile foundations
Specifications for engineering geological survey for industrial and civil buildings 1.0.6 In addition to the present specification, geotechnical engineering investigation in coastal areas shall also comply with the provisions of relevant national standards and specifications. xn
Compression coefficient;
2Main symbols
Correction coefficient of pile end resistance:
Cross-sectional area of pile body;
Width of foundation bottom surface,
Cohesion;
Compression index:
Consolidation coefficient in water assessment direction
Elastic index in water assessment direction;
Undrained shear strength:
Consolidation coefficient in vertical direction:
Foundation Buried depth:
Thickness of overlying non-liquefied layer,
Depth to groundwater level:
Deformation modulus of foundation:
Compression modulus on the ground:
Porosity ratio,
The limiting friction of soil around pile estimated by static penetration resistance; Standard value of foundation bearing capacity;
Safety factor,
Relative density of particles on the ground (specific gravity):
Liquidity index of soil!
Soil liquefaction index:
Soil plasticity index;
Pile length:
Pile lengths divided into ten layers:
Total pressure, total load:
Average additional stress at the bottom of the foundation
Pre-consolidation pressure of the soil;
Specific penetration resistance;
White weight pressure of the overlying soil layer,
Standard value of the bearing capacity of the soil at the pile end:||tt| |Standard value of friction force of soil around pile:
Unconfined compressive strength:
Standard value of vertical bearing capacity of single pile:
Saturation:
Sensitivity;
Length around pile body;
Near average shear wave velocity of stratum;
Natural water content of soil
Liquid limit of soil (determined by butterfly instrument);
Liquid limit of soil (determined by cone instrument
Plastic limit of soil;
Reduction coefficient;
Gravity density of soil (referred to as soil gravity) Mass density of soil (referred to as soil density) Poisson's ratio of soil;
Internal friction angle of soil.
3 Basic technical requirements for geotechnical engineering investigation
3.1 General provisions
: 31.1 The division of the investigation stage should be consistent with the engineering design stage, and can be divided into preliminary investigation and detailed investigation. If necessary, construction assistance should be carried out. For key projects, site selection investigation (feasibility study, preliminary investigation, detailed investigation, and construction investigation) should be carried out separately: for projects with lower site grades or small and medium-sized projects, single structures with determined locations, and expansion and construction projects, a one-time investigation should be carried out. .12 Investigations at each investigation stage of geotechnical engineering: original records and data of surveying, exploration, testing, etc., as well as relevant existing information collected, must be checked, sorted and verified on site in a timely manner. After verification, the office will use it as the basic material for the survey results. 3.2 Classification of geotechnical engineering survey cases
3.2.1 The classification of geotechnical engineering surveys shall be determined based on a comprehensive analysis of the safety level of the structure, the site level and the foundation level.
3.2.2 The dust level of the structure shall be divided into I, II and III levels according to the severity of the damage according to the provisions of Table 3.2.2.
3.2.3 The site level shall be divided into three levels according to the complexity of the site and shall comply with the following provisions:
3.2.3.1 A site that meets any of the following conditions is a Class I site: (1) An area that is dangerous to building seismic resistance:
(2) An area where adverse geological phenomena are strongly developed: (3) An extremely shallow sea area with a complex geological environment and a complex tidal environment: (4) An area with complex topography and landforms
3.2.3.2 A site that meets any of the following conditions is a Class II site: (1) An area that is dangerous to building seismic resistance:
(2) An area where adverse geological phenomena are strongly developed: (3) An extremely shallow sea area with a complex geological environment and a complex tidal environment: (4) An area with complex topography and landforms
Unfavorable location:
Safety level
Bad consequences
Very serious [environmental pollution, human
life safety, economic
loss)
Serious (environmental
pollution, human
safety: economic
loss)
Not serious (environmental
environmental pollution, large
life safety, economic
loss) |Economic period loss
Structure safety level classification table
Structure plastic waste
Annual oil production of more than 1000 tons, service life of more than 1
, platform with more than 1 person living, dike project with annual oil production of more than 20×10: length of more than 1000 people, pier with average water depth above 1000 meters;
Underwater pipeline;
Diameter is greater than or equal to 273mm, length is greater than 1km;
Control power cable and communication cable to the central platform or the island:
Ten thousand tons of damaged wharf single point mooring project, etc.
All structures except Class 1 and Class III
Annual oil production of less than 5000 tons, service life of less than 1000 years. Unmanned platforms, artificial islands: annual crude oil production scale:
length less than km average water depth of more than m:
a waterway, power cables and field signal cables: small dock projects, etc.
(2) areas where adverse geological phenomena generally develop: (3) intertidal zones with complex geological environments and tidal flats with complex geological environments (4) areas with complex topography and landforms,
3.2.3.3 meets the requirements The following conditions are considered as Level 2 sites: (1) The earthquake fortification intensity is equal to or less than 6 degrees, or the site is favorable for building earthquake resistance (good ground rolling phenomenon does not sound ground damage: (4) The site with simple topography and landforms Note: 1 Classification method: #-Start with the second strongest. Level 2 is determined based on the most satisfactory one. 3.24 Determine the foundation grade according to this method 2. For building earthquake resistance The division of favorable, unfavorable and dangerous areas shall be determined in accordance with the provisions of the current national standard "Code for Seismic Design of Buildings".
324 The foundation grade shall be divided into three levels according to the complexity of the foundation and shall comply with the following provisions:
There are many types of rock and soil, the properties vary greatly, the groundwater has a great impact on the project, and special treatment is required for the first-level foundation;
3.2.4.2 There are many types of rock and soil, the properties vary greatly, and the groundwater has an adverse impact on the project as the second-level foundation Foundation:
32.4.3 The rock and soil type is single, the carbon content does not change much, and the groundwater has no effect on the project. The third-level foundation.
The level of engineering investigation on the rock shall comply with the provisions of Table 3.2.5. Classification of geotechnical engineering investigation levels
Conditions for determining the investigation levelbzxz.net
Scenario level
Structural safety level
Site level
Foundation level
Level 2 or 3
Level 3 or 43 The site level should be divided into three levels according to the complexity of the site and should meet the following requirements: 3.2.3.1 The site that meets the following conditions is a first-level site: (1) The site is dangerous to the earthquake resistance of the building; (2) The site where adverse geological phenomena are strongly developed; (3) The extremely shallow sea with complex geological environment and the intertidal area with complex environment; (4) The site with complex topography and landforms. 3.2.3.2 The site that meets one of the following conditions is a second-level site: (1) The site is unfavorable to the earthquake resistance of the building: Safety level The bad consequences are very serious [environmental pollution, human life safety, economic Loss)
Serious (environmental pollution, human safety, economic loss)
Not serious (environmental pollution, human safety, economic loss)
Safety level classification table of structures
Structure plastic waste production: annual dust production of more than 1000 tons, service life of more than 1 year, with more than 1 person living on the platform, annual dust production of more than 20×10-15 meters, average water depth of more than piers) Second project: underwater pipeline; oil and gas pipeline with a diameter greater than or equal to 273mm and a length greater than 1km. Water pipelines:
Control power cables and communication cables leading to the central platform or the island:
Ten thousand ton pier single point mooring projects, etc.
All structures except Class 1 and Class III
Annual crude oil production scale is less than 5 years and service life is less than 10 years. Unmanned platforms and artificial islands: Annual crude oil production scale is less than 5 years and service life is less than 10 years. Unmanned platforms and artificial islands: Annual crude oil production scale is less than 5 years and service life is less than 10 years. Unmanned platforms and artificial islands: Length is less than 100 km and average water depth is less than 100 m:
Waterway, power cable and field communication cable: small pier projects, etc.
(2) Areas where adverse geological phenomena are generally developed: (3) Intertidal zones with complex geological environments and tidal flats with complex geological environments (4) Areas with complex topography and landforms,
3.2.3.3 meets the requirements The following conditions are considered as Level 2 sites: (1) The earthquake fortification intensity is equal to or less than 6 degrees, or the site is favorable for building earthquake resistance (good ground rolling phenomenon does not sound ground damage: (4) The site with simple topography and landforms Note: 1 Classification method: #-Start with the second strongest. Level 2 is determined based on the most satisfactory one. 3.24 Determine the foundation grade according to this method 2. For building earthquake resistance The division of favorable, unfavorable and dangerous areas shall be determined in accordance with the provisions of the current national standard "Code for Seismic Design of Buildings".
324 The foundation grade shall be divided into three levels according to the complexity of the foundation and shall comply with the following provisions:
There are many types of rock and soil, the properties vary greatly, the groundwater has a great impact on the project, and special treatment is required for the first-level foundation;
3.2.4.2 There are many types of rock and soil, the properties vary greatly, and the groundwater has an adverse impact on the project as the second-level foundation Foundation:
32.4.3 The rock and soil type is single, the carbon content does not change much, and the groundwater has no effect on the project. The third-level foundation.
The level of engineering investigation on the rock shall comply with the provisions of Table 3.2.5. Classification of geotechnical engineering investigation levels
Conditions for determining the investigation level
Scenario level
Structural safety level
Site level
Foundation level
Level 2 or 3
Level 3 or 43 The site level should be divided into three levels according to the complexity of the site and should meet the following requirements: 3.2.3.1 The site that meets the following conditions is a first-level site: (1) The site is dangerous to the earthquake resistance of the building; (2) The site where adverse geological phenomena are strongly developed; (3) The extremely shallow sea with complex geological environment and the intertidal area with complex environment; (4) The site with complex topography and landforms. 3.2.3.2 The site that meets one of the following conditions is a second-level site: (1) The site is unfavorable to the earthquake resistance of the building: Safety level The bad consequences are very serious [environmental pollution, human life safety, economic Loss)
Serious (environmental pollution, human safety, economic loss)
Not serious (environmental pollution, human safety, economic loss)
Safety level classification table of structures
Structure plastic waste production: annual dust production of more than 1000 tons, service life of more than 1 year, with more than 1 person living on the platform, annual dust production of more than 20×10-15 meters, average water depth of more than piers) Second project: underwater pipeline; oil and gas pipeline with a diameter greater than or equal to 273mm and a length greater than 1km. Water pipelines:
Control power cables and communication cables leading to the central platform or the island:
Ten thousand ton pier single point mooring projects, etc.
All structures except Class 1 and Class III
Annual crude oil production scale is less than 5 years and service life is less than 10 years. Unmanned platforms and artificial islands: Annual crude oil production scale is less than 5 years and service life is less than 10 years. Unmanned platforms and artificial islands: Annual crude oil production scale is less than 5 years and service life is less than 10 years. Unmanned platforms and artificial islands: Length is less than 100 km and average water depth is less than 100 m:
Waterway, power cable and field communication cable: small pier projects, etc.
(2) Areas where adverse geological phenomena are generally developed: (3) Intertidal zones with complex geological environments and tidal flats with complex geological environments (4) Areas with complex topography and landforms,
3.2.3.3 meets the requirements The following conditions are considered as Level 2 sites: (1) The earthquake fortification intensity is equal to or less than 6 degrees, or the site is favorable for building earthquake resistance (good ground rolling phenomenon does not sound ground damage: (4) The site with simple topography and landforms Note: 1 Classification method: #-Start with the second strongest. Level 2 is determined based on the most satisfactory one. 3.24 Determine the foundation grade according to this method 2. For building earthquake resistance The division of favorable, unfavorable and dangerous areas shall be determined in accordance with the provisions of the current national standard "Code for Seismic Design of Buildings".
324 The foundation grade shall be divided into three levels according to the complexity of the foundation and shall comply with the following provisions:
There are many types of rock and soil, the properties vary greatly, the groundwater has a great impact on the project, and special treatment is required for the first-level foundation;
3.2.4.2 There are many types of rock and soil, the properties vary greatly, and the groundwater has an adverse impact on the project as the second-level foundation Foundation:
32.4.3 The rock and soil type is single, the carbon content does not change much, and the groundwater has no effect on the project. The third-level foundation.
The level of engineering investigation on the rock shall comply with the provisions of Table 3.2.5. Classification of geotechnical engineering investigation levels
Conditions for determining the investigation level
Scenario level
Structural safety level
Site level
Foundation level
Level 2 or 3
Level 3 or 4
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