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GB/T 40112-2021Specifications for risk assessment of geological hazard (English PDF)

地质灾害危险性评估规范

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

May 21, 2021

Implementation date

December 1, 2021

Scope

GB/T 40112-2021 is the English-translated version of 地质灾害危险性评估规范.

GB/T 40112-2021 sets out how to assess the risk of geological hazards before engineering construction and planning in areas prone to such hazards.

It covers the investigation of geological environmental conditions and of the hazards themselves, the assessment of their current status, the prediction of the risk during and after construction, and the comprehensive assessment together with the suitability of land for building, ending with the report, maps and annexes to be submitted.

The hazards addressed are landslides, collapses, debris flows, karst collapse, mined-out collapse, ground fissures, land subsidence and unstable slopes, and the work is graded into assessment levels with grading indicators and technical requirements for each level.

It applies at the feasibility study stage of construction projects and planning. It was issued on 21 May 2021 and has applied since 1 December 2021.

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Document preview — GB/T 40112-2021

National Standard of the People's Republic of China

ICS: 07.060
Classification: P 13

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Basic rules
4.1 Work content
4.2 Working Method
4.3 Job requirements
4.4 Working Procedure
4.5 Scope of the assessment area
4.6 Assessment work level
4.7 Grading of evaluation indicators
4.8 Technical requirements for different levels of assessment
5 Investigation of geological environmental conditions
5.1 General provisions
5.2 Regional geological background
5.3 Meteorology and Hydrology
5.4 Topography
5.5 Geological structure
5.6 Stratum lithology
5.7 Engineering geological conditions
5.8 Hydrogeological conditions
5.9 Special engineering geological problems
5.10 The impact of human engineering activities on the geological environment
6 Geological Hazard Investigation
6.1 General provisions
6.2 Landslide
6.3 Collapse
6.4 Debris flow
6.5 Karst collapse
6.6 Mined-out collapse
6.7 Ground fissure
6.8 Land subsidence
6.9 Unstable slope
7 Assessment of the current status of geological hazards
7.1 General provisions
7.2 Landslide
7.3 Collapse
7.4 Debris flow
7.5 Karst collapse
7.6 Mined-out collapse
7.7 Ground fissure
7.8 Land subsidence
7.9 Unstable slope
8 Prediction and assessment of the risk of geological hazards during and after completion of the project
8.1 General provisions
8.2 Landslide
8.3 Collapse
8.4 Debris Flow
8.5 Karst collapse
8.6 Mined-out collapse
8.7 Ground fissure
8.8 Land subsidence
8.9 Unstable slope
9 Prediction and assessment of the risk of geological disasters in construction projects
9.1 General provisions
9.2 Industrial and civil construction engineering
9.3 Road Traffic Engineering
9.4 Oil and gas pipeline engineering
9.5 Water Conservancy and Hydropower Engineering
9.6 Port and Wharf Engineering
9.7 Urban master plan, village and market town planning area
10 Comprehensive assessment of the risk of geological hazards and evaluation of the suitability of construction land
10.1 General provisions
10.2 Comprehensive assessment of the risk of geological hazards
10.3 Suitability evaluation of construction land
10.4 Suggestions on geological disaster prevention measures
11 Results submission
11.1 General provisions
11.2 Report
11.3 Figure
11.4 Annex
Appendix A (informative appendix) Technical work flow diagram of geological hazard risk assessment
Appendix B (Informative Appendix) Geological Hazard Assessment Questionnaire
Appendix C (informative appendix) Geological disaster prevention and control measures suggestion table
Appendix D (Normative Appendix) Geological Hazard Risk Assessment Results

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

Introduction

According to the "Regulations on the Prevention and Control of Geological Disasters" (Order [2003] No. 394 of the State Council) and the "Decision of the State Council on Strengthening the Prevention and Control of Geological Disasters" (Guo Fa [2011] No. 20), in order to standardize the risk assessment of geological hazards in engineering construction and planning in areas prone to geological hazards, this document was formulated standard.

1 Scope

This standard specifies the survey of geological environmental conditions, the survey of geological hazards, the current assessment of the risk of geological hazards, the predictive assessment, the comprehensive assessment and the Evaluation of suitability of construction land, content, methods and requirements of results submission, etc.

This standard is applicable to landslides, avalanches, and debris during the feasibility study stage of various engineering construction and planning in areas prone to geological disasters.

Risk assessment of geological disasters such as flow, karst collapse, mined-out collapse, ground fissures, ground subsidence, unstable slopes, etc.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 12328-1990 Comprehensive engineering geological map legend and color code

GB 50021 Geotechnical Engineering Survey Code

DZ/T 0179-1997 color standard and principle of geological map (1:50000)

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 Karst collapse

The rock and soil above the karst caves are deformed and destroyed under the action of natural or human factors, and form a geological phenomenon of collapse on the ground.

3.2 Mine-out area breakdown

After the underground ore body is mined, the upper part of the ore layer and the surrounding rock layers lose support, and the balance condition is destroyed, and then it is bent and collapsed, so It is a geological phenomenon of subsidence, deformation and collapse of the ground.

3.3 Ground fissure

The surface rock and soil are cracked under the action of natural factors or man-made factors, and form cracks with a certain length, width and depth. Table destruction of the geological phenomenon.

3.4 Geological environmental conditions

Geological elements related to human survival, living, and dependence on engineering facilities.

Note: Geological environmental conditions include topography, hydrometeorology, stratum lithology, geological structure, hydrogeology, engineering geology, and the impact of human activities.

3.5 Geological hazard-prone area

There are geological environmental conditions where geological disasters occur, and areas prone to geological disasters.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 36 pages — is available in the English PDF.

Referenced standards

Normative references

GB 50021

Cited by

GB/T 46548-2025Technical specification for the geological environment investigation of coal mining subsidence areas

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