GB 50021-2001 岩土工程勘察规范（英文版）
Code for Investigation of Geotechnical Engineering
1 General provisions
2 Terms and symbols
3 Investigation classification and geotechnical classification
4 Basic Requirements of Engineering Investigations
4.1 Building Construction and Structures
4.2 Underground Excavation
4.3 Bankside Engineering
4.4 Road and Overhead Network Engineering
4.5 Waste Disposal Engineering
4.6 Nuclear Power Plant
4.7 Side Slope Engineering
4.8 Foundation Excavation Engineering
4.9 Pile Foundation
4.10 Foundation Treatment
4.11 Load Increasing and Protection for Pre-existing Building
5 Adverse Geological Action and Geological Disaster
5.3 Dangerous Rock and Collapse
5.4 Mud-rock Flow
5.5 Worked-out Section
5.6 Land Subsidence
5.7 Seismic Effect of Site and Foundation
5.8 Active Faults
6 Special Rock and Soil
6.1 Collapsible Soil
6.2 Red Clay
6.3 Soft Soil
6.4 Fabricated Soil
6.6 Perennial Frost
6.7 Expansion Rock and Soil
6.8 Brine Salting Rock and Soil
6.9 Decayed Rock and Residual Soil
6.10 Pollute Soil
7.1 Investigation Requirements of Groundwater
7.2 Mensuration for Hydrogeologic Parameter
7.3 Evaluation for Functions of Ground-Water
8 Engineering Geological Mapping and Survey
9 Exploration and Sampling
9.1 General Requirements
9.3 Costeen, Trenching and Cave Exploration
9.4 Adopting of Geotechnical Samples
9.5 Geophysical Exploration
10 In-situ Measurement
10.1 General Requirements
10.2 Load Test
10.3 Statically Cone Penetration Test
10.4 Circular Cone Dynamic Penetration Test
10.5 Standard Penetration Test
10.6 Vane Shear Test
10.7 Pressurementer Test
10.8 Flat Dilatometer Test
10.9 In-situ Direct Shear Test
10.10 Wave Celerity Testing
10.11 Rock Mass In-Situ Stress Testing
10.12 Testing with Shock Excitation Method
11 Indoor Test
11.1 General Requirements
11.2 Soil Physical Property Test
11.3 Soil Compress Consolidation Test
11.4 Soil Shear Strength Test
11.5 Soil kinetic Property Test
11.6 Rock Test
12 Assessment of Water and Soil Corrosivity
12.1 Sampling and Testing
12.2 Corrosion Evaluation
13 In-situ Inspection and Monitoring
13.1 General Provisions
13.2 Inspection and Monitoring for Foundation of Ground Base
13.3 Monitoring for Bad Geological Action and Geologic Hazard
13.4 Monitoring of Groundwater
14 Geotechnical Engineering Analysis Assessment and Result Report
14.1 General Provisions
14.2 Analyses and Adoption of Rock and Soil Parameter
14.3 Basic Requirements of Outcome Report
Appendix A: Rock/soil Classification and Verification
Appendix B: blow count correction of taper dynamic sounding
Appendix C: Engineering classification of debris flow
Appendix D: Primary distinguishing method of swelling soil
Appendix E: Hydrogeologic parameter measurement method
Appendix F: technical standards of the soil sampler
Appendix G: site environment type
Appendix H Explanation of Wording
1 General Provisions
1.0.1 This code is formulated with a view to implement the related national technical-economic policies in the geotechnical investigation activities, to accomplish state-of-the-art technology and economic feasibility, to ensure engineering quality and to improve investment benefit.
1.0.2 This Code is applicable to the geotechnical investigation of the engineering projects excluding hydraulic works, railway, highway, bridge and culverts.
1.0.3 Prior to the engineering and construction of the projects, the geotechnical investigation must be carried out according to the basic construction procedure.
1.0.3 A The geotechnical investigation shall, according to the requirements of each investigation stages of the engineering construction, exactly reflect the engineering geological conditions, and ascertain the adverse geological action and geological disaster. Through meticulous investigation and careful analysis, an investigation report presenting integral information and accurate assessment shall be provided.
1.0.4 For the geotechnical investigation, not only the requirements stipulated in this Code but also those in the current relevant ones of the nation shall be complied with.
2 Terms and Symbols
2.1.1 Geotechnical Investigation
It's referred to the activities that according to the requirements of the construction projects, the geological, environmental and geotechnical engineering conditions of t he construction site shall be ascertained, analyzed and assessed so as to finalize the investigation documents.
2.1.2 Engineering Geological Mapping
It's referred to adopt such methods as data gathering, survey visiting, geological survey and remote interpretation to ascertain the engineering geological elements of the site and to draw the corresponding engineering geological maps.
2.1.3 Geotechnical Exploration
It's a mean of geotechnical investigation, including borehole surveying, costeaning, trenching exploration, test pitting, hole exploration, geophysical exploration and penetration sounding.
2.1.4 In-situ Testing
The rock/soil mass is tested according to its position, and the primary structure, humidity and stress condition of the rock/soil shall be basically remained.
2.1.5 Geotechnical Investigation Report
It's referred to the investigation technical document that is finalized through unscrambling, statistics, conclusion, analysis, assessment, proposing engineering recommendations and forming a system as well as serving for the project construction service.
2.1.6 In-situ Inspection
Some measures shall be adopted to inspect the investigation achievement, or the effects of design and construction measures in site.
2.1.7 In-situ Monitoring
The change of the rock/soil property and groundwater, the stress/displacement of the rock/soil mass and the structures shall be systematically monitored and observed in site.
2.1.8 Rock Quality Designation (RQD)
The rock is drilled with 75 mm-diameter diamond bit and double barrel, and the coring is carried out continually; in the coring of the drilling run, the ratio between the total length of those drill-cores longer than 10 cm and the said footage per round trip shall be presented with percentage.
2.1.9 Quality Classification Of Soil Samples
The soil samples shall be classified according to the various disturbance degrees.
2.1.10 Adverse Geological Actions
It referred to those geologic actions that might endanger the projects due to the internal earth force or external earth force.
2.1.11 Geological Disaster
It referred to the event that endangers to safety of person, properties, works or environment due to the adverse geological actions.
2.1.12 Ground Subsidence/land Subsidence
It's referred to the land subsidence in large area, which is generally caused by the regional conical depression due to excessive groundwater abstraction. The large area of underground mining cavity and the deadweight collapse of loess also can result in ground subsidence.
2.1.13 Standard Value of a Geotechnical Parameter