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NB/T 10390-2020 English PDF

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NB/T 10390-2020: (Design specification for sand basin of hydropower project)
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Basic data

Standard ID NB/T 10390-2020 (NB/T10390-2020)
Description (Translated English) (Design specification for sand basin of hydropower project)
Sector / Industry Energy Industry Standard (Recommended)
Classification of Chinese Standard P59
Classification of International Standard 27.140
Word Count Estimation 80,847
Date of Issue 2020-10-23
Date of Implementation 2021-02-01
Older Standard (superseded by this standard) DL/T 5107-1999
Regulation (derived from) National Energy Administration Announcement No. 5 [2020]
Issuing agency(ies) National Energy Administration

NB/T 10390-2020: (Design specification for sand basin of hydropower project)

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Code for Design of Desilting Basin for Hydropower Projects Energy Industry Standards of the People's Republic of China Replace DL/T 5107-1999 Design specification for sedimentation basin of hydropower project 2020-10-23 released 2021-02-01 implementation

Foreword

According to the "Notice of the National Energy Administration on Issuing the.2015 Energy Sector Standard System (Revision) Plan" (National Energy Administration Neng Technology [2015] No. 283) requirements, the specification preparation team has conducted extensive investigations and studies, earnestly summarized practical experience, and participated in the Examine relevant domestic advanced standards, and revise this specification based on extensive solicitation of opinions. The main technical content of this specification is. the setting conditions and design standards of the sedimentation basin, the selection of the sedimentation basin type, and the sedimentation basin. Layout, hydraulic design and main size calculation, structure design, operation design, sediment observation design. The main technical content of this specification revision is. - Increased the calculation requirements for the design of the sand basin structure. - Modified the scope of application of the specification. Changed from level 3 and above in large and medium-sized hydropower and water conservancy projects to hydropower Sand basin in the project. - Modified the standard for setting the sand basin. - Deleted the water conservancy sedimentation basin setting standards. This specification is managed by the National Energy Administration, proposed by the General Institute of Hydropower and Water Conservancy Planning and Design, and is responsible for daily management. The Hydropower Survey and Design Standardization Technical Committee of the Energy Industry is responsible for the interpretation of specific technical content. If intentionally during execution See or suggest, please send to the General Institute of Hydropower and Water Conservancy Planning and Design (Address. No. 2, Kangbei Xiaojie, Liupu, Xicheng District, Beijing, post Edit. 100120). Editor-in-chief of this code. China Power Construction Group Chengdu Survey and Design Research Institute Co., Ltd. The main drafters of this specification. Zhu Wanqiang, Huang Yankun, Hao Yuanlin, Jiang Dequan, He Xianpei, and Liu Ding Tian Xun Lu Jinbo Lu Peican Yuan Liyi Chen Qiang Ju Lin Main reviewers of this specification. Dang Lin Cai Fang Guangda Zhang Hongwu Liu Xingnian Li Guobin Long Qihuang Cao Yubo Wang Yiguan Li Hai Hu Wangxing Jiang Hongjun Wu Caiping Yang Jinying Zhao Yi Liu Rongli Li Shisheng

Table of contents

1 General...1 2 Terminology...2 3 Setting conditions and design standards of sand basin...4 3.1 Basic information...4 3.2 Determination of the amount of sand entering the pool and the gradation of sediment...4 3.3 Setting conditions of the sedimentation basin and sedimentation standards...5 4 Selection of Sand Basin Type...7 5 Arrangement of Sand Basin...10 5.1 General regulations...10 5.2 Regularly flushing the sand settling tank...10 5.3 Continuous flushing sand settling tank...11 5.4 Canal Sand Basin...11 6 Hydraulic design and calculation of main dimensions...13 6.1 General regulations...13 6.2 Diversion channel and upstream connecting section...13 6.3 Working section...13 6.4 Downstream connecting section and water conveyance...16 6.5 Hydraulic calculation of sand basin and desilting channel...16 7 Structural Design...17 7.1 General provisions...17 7.2 Structural calculation...17 8 Operational design...19 9 Sediment Observation Design...20 Appendix A Calculation of Sediment Settlement...21 Appendix B Calculation of Suspended Load Sediment Settlement...27 Appendix C Hydraulic calculation of sediment discharge in the sedimentation basin...29 Appendix D Flushing Calculation of Sand Settlement...32 Explanation of terms used in this specification...36 List of Reference Standards...37 Attachment. Article description...38

1 General

1.0.1 In order to standardize the design of sedimentation basins in water diversion structures of hydropower projects, this code is formulated. 1.0.2 This code is applicable to the design of the sedimentation basin for the treatment of suspended sediment in hydropower projects. 1.0.3 The design of the sand basin for hydropower projects shall not only conform to this code, but also conform to the current relevant national standards.

2 term

2.0.1 Desilting basin It is used to settle suspended sediment with particles larger than the designed sedimentation diameter in the sand-carrying water flow, and to reduce the sediment content in the water flow. Building. 2.0.2 Periodic flushing desilting basin After the sedimentation basin has accumulated to a certain degree, the sand sluice is opened for flushing, and the sedimentation basin is operated alternately for sedimentation and washing. 2.0.3 continuous flushing desilting basin While continuously supplying water, the sediment will be continuously washed and discharged into the sedimentation basin of the downstream river. 2.0.4 Desilting channel Natural depressions are used to form a long-length wide and shallow soil canal sedimentation basin. 2.0.5 working section The main section of the sedimentation basin used for sedimentation. 2.0.6 working length The length of the working section used to deposit sediment in the sedimentation basin. 2.0.7 working width The width of the working section used to deposit sediment in the sedimentation basin. 2.0.8 working depth The water depth between the normal water level of the sedimentation basin and the designed sedimentation elevation. 2.0.9 working flow The flow rate is the reference flow rate for the sedimentation basin of a hydropower station with regular flushing, and the flow rate is the reference flow rate for the sedimentation basin with sand discharge holes The sum of the sand discharge flow from the bottom hole at the end of the pool; reference to the continuous flushing sedimentation basin...

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