SL 270-2001Technical regulation of sampling and preparating on water environment of the heavy sediment - laden river (English PDF)
多泥沙河流水环境样品采集及预处理技术规程 SL 270-2001
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Issued by
Ministry of Water Resources of the People's Republic of China
Level / Type
National · Mandatory
Issue date
August 2, 2001
Implementation date
December 1, 2001
Scope
SL 270-2001 is the English-translated version of 多泥沙河流水环境样品采集及预处理技术规程 SL 270-2001.
SL 270-2001 is the Chinese standard "Technical regulation of sampling and preparating on water environment of the heavy sediment - laden river".
This standard specifies: Multi- sediment samples collected river water environment and pretreatment techniques and methods, This standard applies to: Multi river water and sediment environmental samples collection and pretreatment, does not apply to domestic sewage, industrial wastewater containing suspended solids water in environmental samples collection and pretreatment, this standard must be used with the corresponding environmental quality standards and evaluation methods to match. Issued on 2001-08-02, in force from 2001-12-01.
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Document preview — SL 270-2001
National Standard of the People's Republic of China
- ICS
- 27.140; 93.160
- Classification
- P56
Contents
- [Preview only]
- 1 General Provisions
- 2 Terms and Symbols
- 2.1 Terms
- 2.2 Symbols
- 3 Soil Erosion Type Division
- 3.1 Grade 1 Type Area
- 3.2 Grade II Type Area
- 3.3 Scope and Feature
- 4 Soil Erosion Intensity Graduation
- 4.1 INTENSITY GRADUATION OF WATER EROSION AND GRAVITY EROSION
- 4.2 WIND EROSION AND MIXING EROSION (DEBRIS FLOW) INTENSITY GRADUATION
- 4.3 Layout of Multipurpose Tunnel
- 5 Soil Erosion Degree Graduation
- 5.1 Selection of Pressure State
- 5.2 Sectional Shape
- 5.3 Sectional Dimension
- 6 Hydraulic Design of Tunnel
- 6.1 Calculation Principle
- 6.2 Anti-cavitation Design of Hydraulic Tunnel with High Velocity
- 7 Design of Soil Tunnel
- 7.1 Support and Lining of Soil Tunnel
- 7.2 Joint Division of Soil Tunnel Lining and its Anti-Seepage and Waterstop
- 8 Design of Tunnel Section at Adverse Geology
- 9 Tunnel Support and Lining
- 9.1 General Requirements
- 9.2 Loads and Load Combinations
- 9.3 Concrete and Reinforced Concrete lining
- 9.4 Prestressed Concrete Lining
- 9.5 Unlined and Anchor-shotcrete Lined Tunnel
- 9.6 Design of Reinforced Concrete Lining Bifurcated Tunnel
- 9.7 Joints on Lining
- 9.8 Design of Water Retaining Jam
1 Foreword
SL 270-2001 was issued by Ministry of Water Resources of the People's Republic of China on 2 August 2001 and has been in force since 1 December 2001.
The SL prefix, without a suffix, marks a mandatory standard: within its scope, compliance is required.
The document runs to 11 pages in English translation.
2 Scope Preview
This standard specifies: Multi- sediment samples collected river water environment and pretreatment techniques and methods, This standard applies to: Multi river water and sediment environmental samples collection and pretreatment, does not apply to domestic sewage, industrial wastewater containing suspended solids water in environmental samples collection and pretreatment, this standard must be used with the corresponding environmental quality standards and evaluation methods to match.
SL 270-2001 falls under ICS 27.140; 93.160, in the field of energy and heat transfer engineering.
This catalogue holds 100 other SL standards in that field.
In this catalogue, SL standards carry edition years from 1989 to 2020.
3 About this standard
Sector: Water Resources Industry Standard
Issued by: Ministry of Water Resources of the People's Republic of China
English translation: about 11 pages (approximate)
Chinese original: about 17,127 characters
4 Related standards
Standards on related subjects:
GB 50788-2012 — Technical code for water supply and sewerage of urban
SL 314-2004 — Design specification for roller compacted concrete dams
SL 282-2003 — Design specification for concrete arch dams
SL/T 826-2024 — Code for formulation of riparian zone protection and utilization planning
SL/T 666-2024 — Technical Guidelines for the Preparation of Mountain Flood Disaster Prevention Plans
SL 261-2017 — Code for lakes
5 Classification and status
International classification (ICS): 27.140; 93.160
Chinese Standard Classification (CCS): P 56
Prefix SL: mandatory standard.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 11 pages — is available in the English PDF.
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SL 270-2001
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