SL/T 299-2020 in English

VALID

Code for geological mapping of water and hydropower proj ects

Issued on:2020-11-30
Implemented on:2021-02-28
File Format:PDF
Delivery:Via email within 10 business days

Price(USD)： $1,270.00
$1,232.00

Standard No:	SL/T 299-2020
Document status:	VALID
Title in English:	Code for geological mapping of water and hydropower proj ects
Title in Chinese:	水利水电工程地质测绘规程
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 10 business days
Issued on:	2020-11-30
Implemented on:	2021-02-28
Professional Classification:	SL-Water Resources
Related Keywords:	geological mapping geological survey geological surveying water conservancy geological boundary verification rate
Related Topics:	water conservancy geology surveying and mapping hydropower project Ministry of Water Resources profit physical geology electric water Mapping+ Local water conservancy hydropower quality testing hydropower project Water Resources and Hydropower Engineering Geology Engineering Geology water quality process Water Resources and Hydropower Engineering Specifications for Geological Surveying and Mapping of Water Conservancy and Hydropower Engineering Construction survey of hydropower and water conservancy underground engineering Durability of water conservancy and hydropower projects plumber Water conservancy project lime Fire protection in water conservancy and hydropower projects Water conservancy dynamometer standard Soft soil foundation construction monitoring technology for hydropower and water conservancy projects Surveying and mapping standards Surveying and mapping standards Engineering Geological Surveying and Mapping geological engineering fracturing Unconventional water quality Engineering surveying and mapping execution Energy dissipation in water conservancy and hydropower projects sl/t247-2020 Water conservancy and hydropower survey

Introduction

Technical interpretation of the code for geological surveying and mapping of water conservancy and hydropower projects

1. Background and scope of application of the standard revision

This code replaces the SL 299-2004 version, and is mainly aimed at the surveying and mapping work in the geological survey of water conservancy and hydropower projects, and is applicable to:

Geological survey of various types of water conservancy and hydropower hub projects
Engineering geological survey of water diversion and regulation lines
Embankment projects and hazard removal and reinforcement projects
Survey of natural building materials

Core revisions: New digital surveying and mapping technical requirements, improved goaf area investigation regulations, and refined karst area surveying and mapping indicators.

2. Basic procedures for surveying and mapping

Phase	Work content	Technical requirements
Preparation	Data collection, on-site investigation	Collect regional geological maps above 1:50,000
Field surveying	Geological point layout, profile measurement	GPS positioning error ≤ 2m
Data collation	Map compilation, database construction	Comply with SL 73.1 mapping standard

3. Key technical requirements

3.1 Scale selection principles

Determined according to the project stage and geological complexity:

Planning stage: 1:50,000~1:25,000
Feasibility study: 1:10,000~1:5,000
Preliminary design: 1:2,000~1:500

3.2 Mapping of special geological phenomena

Karst areas Need to focus on the following:

Spatial distribution characteristics of karst caves
Underground river connectivity test
Risk of covered karst collapse

4. Application of digital surveying and mapping technology

Recommended:

Remote sensing interpretation (resolution ≥ 0.5m)
3D laser scanning
Construction of geological information database

Note: The original data needs to be converted into coordinates (2000 National Geodetic Coordinate System)

5. Acceptance criteria for results

Acceptance points include:

Geological point density compliance rate ≥ 90%
Important geological boundary verification rate 100%
Depth of agreement between map and actual situation ≥ 95%

More samples: GB 50021-2001(2009) YD/T 3934-2021 DL/T 5154-2012

Sample only — not a preview of SL/T 299-2020

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