SL 188-2005 Code for geological investigation of embankment engineering (with clause explanation)
Some standard content:
ICS27.140
Water conservancy industry standard of the People's Republic of China
SL1882005
Replaces SL/T188-96
Code of geological investigation for levee engineering
project2005-04-18 Issued
Ministry of Water Resources of the People's Republic of China
2005-07-01 Implementation
Ministry of Water Resources of the People's Republic of China
Notice on the approval and issuance of "Regulations on Geological Survey for Levee Engineering" SL188-2005
Water Resources [2005] No. 148
All units directly under the Ministry, water resources (water affairs) departments (bureaus) of provinces, autonomous regions and municipalities directly under the Central Government, water resources (water affairs) bureaus of cities with independent planning status, and water resources bureau of Xinjiang Production and Construction Corps: After review, "Regulations on Geological Survey for Levee Engineering" is approved as a water conservancy industry standard and is hereby issued. The standard number is SL188-2005, replacing SL/T188-96. This standard shall be implemented from July 1, 2005. The standard text is published and distributed by China Water Resources and Hydropower Press. On April 18, 2005, according to the Ministry of Water Resources' Water Resources and Hydropower Planning and Design Administration's "Notice on Issuing the 2001 Water Resources and Hydropower Survey and Design Technical Standards Formulation, Revision Project Plan and Chief Editor", the "Regulations on Geological Survey for Embankment Engineering" (SL/T188--96) was revised. This standard consists of 9 chapters, 29 sections, 165 articles and 5 appendices. The main technical contents are: 1. Scope of application of the standard: 1. Planning of the geological survey stage of embankment engineering 1. Tasks, contents and methods of geological survey for embankment engineering; 2. Survey of embankment body; 3. Survey of special soil; 4. Survey of natural building materials; 5. Survey results. The contents of this revision are: 6. The structure has been appropriately adjusted: 7. A preface has been added to the front part; 8. Terms, symbols and codes have been added: 9. The relevant contents of geological survey for large and medium-sized culverts and embankments have been added; 10. Seepage prevention and embankment have been added. and the relevant contents of the construction geology of large and medium-sized culverts; one, the embankment survey was added;
- "poor soil embankment survey" was changed to "special soil survey", and loess, dispersed soil, frozen soil, red clay and other contents were added, the provisions on the treatment principles of poor soil embankment foundation were deleted, and the provisions on the engineering geological evaluation of special soil were added; one, the appendix in the original standard was deleted, and five appendices were added, including soil classification, criteria for distinguishing dispersed soil, classification of embankment geological structure, judgment of soil seepage deformation, and classification of embankment foundation and embankment engineering geological conditions. ||tt| |Article 5.3.13 and paragraph 3 of Article 8.0.2 of this standard are mandatory provisions and are marked in bold.
The previous versions of the standards replaced by this standard are: —SL/T188-96
This standard is approved by: Ministry of Water Resources of the People's Republic of China. This standard is hosted by: General Institute of Water Resources and Hydropower Planning and Design of the Ministry of Water Resources. This standard is interpreted by: General Institute of Water Resources and Hydropower Planning and Design of the Ministry of Water Resources. This standard is edited by: Yangtze River Survey, Planning and Design Institute of Yangtze River Commission. This standard is edited by: Yellow River Water Resources Commission Survey, Planning and Design Research Institute. Institute of Survey and Design of Pearl River Water Conservancy Commission Heilongjiang Water Conservancy and Hydropower Survey and Design Institute
Zhejiang Water Conservancy and Hydropower Survey and Design Institute
Publisher and issuer of this standard: China Water Conservancy and Hydropower Press Main drafters of this standard: Ma Guisheng Zhao Yan Feng Deshun Luo Xiaojie
Shi Boxun Zhao Chengsheng Fan Zifu Fang DengmingwwW.bzxz.Net
Bai Xiaomin Li Ningxin Dai Qixiang Yang
Technical person in charge of the review meeting of this standard: Li Guangcheng Reviewer of the style and format of this standard: Shanyang
Zhu Honglei
Shu Terms, symbols and codes
Symbols and codes
Survey tasks
Survey content
Planning stage
Feasibility study stage
Preliminary design stage
Construction geology
Survey methods·
Preparatory work
Engineering geological surveying
Sampling and testing·
In-situ testing
Hydrogeological testing and long-term observation
Embankment investigation
Special soil investigation| |tt||Salt soil
Expansive soil
Artificial fill
Dispersed soil
7.8 Red clay
8Survey of natural building materials..
Survey results
General provisions
Geological survey report for embankment engineering
Geological survey report for large and medium-sized culvert engineering
Construction geological report
Archive of original data and survey results
Appendix A
Appendix B
Appendix C
Appendix D
Appendix E
Classification of soil
Criteria for distinguishing dispersed soil
Classification of geological structure of embankment foundation
Discrimination of seepage deformation of soil
Classification of engineering geological conditions of embankment foundation and embankment
Explanation of standard terms
Explanation of clauses
1 General
1.0.1 This standard is formulated to standardize the engineering geological investigation of embankments, clarify the investigation tasks, contents, methods and requirements, and ensure the quality of investigation results. 1.0.2 This standard is applicable to the engineering geological investigation of Class 1, Class 2, and Class 3 embankments, culverts, and embankments of rivers, lakes, and seas. The engineering geological investigation of Class 4 and Class 5 embankments of rivers, lakes, and seas can be implemented as a reference.
1.0.3 The engineering geological investigation stage of embankments should be consistent with the design stage. New embankment projects can be divided into three stages: planning, feasibility study, and preliminary design; existing embankment reinforcement projects can be divided into two stages: feasibility study and preliminary design. Construction geological work should be carried out for embankment projects with large scale, complex geological conditions or special requirements. 1.0.4 The referenced standards of this standard mainly include: "Specifications for Geological Investigation of Water Conservancy and Hydropower Projects" (GB50287-99), "Soil Classification Standard" (GBJ145-90), "Specifications for Geological Investigation of Small and Medium-sized Water Conservancy and Hydropower Projects" (SL55--93), "Drawing Standard for Water Conservancy and Hydropower Projects" (SL73.1~595), "Geotechnical Testing Code" (SL237-1999), "Exploration Code for Natural Building Materials for Water Conservancy and Hydropower Projects" (SL251-2000), "Drilling Code for Water Conservancy and Hydropower Projects" (SL291-2003), "Geological Surveying and Mapping Code for Water Conservancy and Hydropower Projects" (SL299-2004) 1.0.5 In addition to complying with this standard, the geological investigation of embankment projects shall also comply with the provisions of the relevant national standards currently in force.
2.1.1 Levee
2 Terms, symbols and codes
2.1 Terms
Earth embankments or flood control walls built along the coast of rivers, lakes, seas or around reservoirs and flood diversion areas.
2.1.2 Levee project
leveeproject
General term for levees, levee protection and culverts. 2.1.3 Landside
The backwater side of the levee.
2.1.4 Landside
The waterside of the levee.
2.1.5 Levee
waterside
The bank slope whose own stability has a direct impact on the levee. Impervious soil
impervious soil
fine-grained soil that is impervious or has very low permeability used for levee construction. 2.1.7 Soil for landside seepage berm Soil used to build a platform within a certain width of the slope foot of the embankment to prevent seepage deformation.
borehole backfilling
2.1.8 Borehole backfilling refers to the backfilling and sealing of the completed embankment boreholes with appropriate materials to prevent seepage damage along the boreholes.
2.2 Symbols and codes
Cu—-uniformity coefficient;
D—-dispersion degree;
D10—when judging contact impact, the particle size of the coarser layer of soil, the mass of soil smaller than this particle size accounts for 10% of the total soil mass; 2
Ds—when judging contact loss, the particle size of the coarser layer of soil, the mass of soil smaller than this particle size accounts for 15% of the total soil mass; D2—when judging contact loss, the particle size of the coarser layer of soil, the mass of soil smaller than this particle size accounts for 20% of the total mass;
d—the particle size d that distinguishes coarse and fine particles in the particle composition of soil.The final aperture of the pinhole test for dispersed soil; d3 - soil particle size, the mass of soil smaller than this particle size accounts for 3% of the total soil mass;
ds - soil particle size, the mass of soil smaller than this particle size accounts for 5% of the total soil mass;
d - soil particle size, the mass of soil smaller than this particle size accounts for 10% of the total soil mass;
d20 - soil particle size, the mass of soil smaller than this particle size accounts for 20% of the total soil mass;
do - soil particle size, the mass base of soil smaller than this particle size accounts for 70% of the total soil mass;
d85 - soil particle size, the mass of soil smaller than this particle size accounts for 85% of the total soil mass;
G - soil specific gravity;
J. Critical hydraulic gradient of soil
—permeability coefficient of soil;
n——porosity of soil;
PS--percentage of exchangeable sodium ions:
P. ——fine particle content of soil;
TDS-total cation exchange volume.
3 Investigation tasks
During the planning stage, the geological investigation of levee engineering should complete the following tasks: 3.0.1
Problems.
Understand the regional geological landscape of each levee line plan area. Understand the basic geological conditions and main engineering geology of each levee line plan area Understand the distribution of natural building materials. During the feasibility study stage, the geological investigation of levee engineering should complete the following tasks: Understand the regional geological structure and conduct regional structural stability evaluation. 2 Basically find out the hydrogeological and engineering geological conditions of each levee line of the newly built levee and the main engineering geological problems, and compare the levee lines to preliminarily predict the environmental geological problems that may occur after the levee is blocked.
3Basically identify the hydrogeological and engineering geological conditions of the existing levees and the main existing engineering geological problems, and conduct a preliminary segmented evaluation of the levee foundation in combination with the dangerous conditions and hidden dangers of previous years. 4Basically identify the hydrogeological and engineering geological conditions of the culvert and sluice site area, conduct a preliminary evaluation of the main existing engineering geological problems, and basically identify the dangerous conditions and hidden dangers of the sluice foundation for the reinforcement, expansion, reconstruction and reconstruction of the existing levees, and put forward suggestions for reinforcement treatment. 5Investigate and understand the hydrogeological and engineering geological conditions of the levee bank slope, and conduct a preliminary segmented evaluation of the bank slope stability.
6Conduct a survey of natural building materials.
The engineering geological survey of the levee in the preliminary design stage should complete the following tasks: 3.0.3
1Identify the hydrogeological and engineering geological conditions along the newly built levee, conduct a segmented evaluation, and predict the environmental geological problems that may occur after the levee is blocked. 2. Identify the hydrogeological and engineering geological conditions of the sections of the built embankments to be reinforced, analyze the causes and degree of hazards, and propose measures for reinforcement. 3. Identify the hydrogeological and engineering geological conditions of the drip gate foundation, evaluate the main existing engineering geological problems, and propose measures to deal with the geological hazards related to the reinforcement, expansion, and reconstruction of the culvert. 4
4 Identify the hydrogeological and engineering geological conditions of the embankment protection section, and evaluate the stability of the embankment in combination with the slope protection plan.
5 Further conduct a survey of natural building materials. 3.0.4
Construction geology should complete the following tasks:
Verify the results of the previous survey.
Predict and forecast adverse geological phenomena that may occur during construction, and propose treatment suggestions. If necessary, special engineering geological surveys or research can be carried out. 3. Participate in the acceptance of engineering projects related to geology. 5
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