四川水力发电2025，Vol.44Issue(1)：66-69,74,5.DOI:10.20196/j.cnki.scslfd.20250116
银江水电站导流明渠截流戗堤龙口段的施工与过程控制
Construction and Process Control of the Cofferdam Closure Crest at the Diversion Open Channel of Yinjiang Hydropower Project
黄俊 1马中将 1高二强1
作者信息
- 1. 中国电建集团贵阳勘测设计研究院有限公司,贵州 贵阳 550081
- 折叠
摘要
Abstract
The diversion open channel closure of Yinjiang Hydropower Project was carried out by the right-bank advancing single-cofferdam vertical closure method.The axis length of the cofferdam is approximately 113.5 m,the elevation of the bottom opening of the cofferdam is 970.0 m,the elevation of the top of the cofferdam is 987.0 m,and the maximum height of the cofferdam is 17 m.During the diversion open channel closure process,the flow was diverted through 5 flood discharge holes on the left bank,and the elevation of the sand re-taining weir in front of the dam is 982.0 m.According to the measured water level data in front of the sand re-taining weir,when the upstream inflow is less than 1000 m3/s,the water level elevation in front of the up-stream sand retaining weir is lower than EL.982.00 m.Through hydraulic calculations,when the upstream inflow is 1000 m3/s and the width of the cofferdam closure crest is 35 m,the water level difference between the upstream and downstream of the cofferdam closure crest is approximately 2.13 m,and the average flow veloci-ty at the cofferdam closure crest is approximately 5.50 m/s.As the cofferdam closure crest continuously nar-rows,the water level difference between the upstream and downstream,the flow velocity,and the difficulty of advancing the cofferdam closure crest will gradually increase accordingly.Based on the above construction characteristics of the diversion open channel closure,through the analysis and summary of the closure plan,the preparation of closure materials,the process control during the closure,and the follow-up work after the clo-sure,it provides useful references and examples for the closure construction of similar hydropower project pro-jects.关键词
银江水电站/截流戗堤/龙口/施工过程控制Key words
Yinjiang Hydropower Project/Cofferdam closure crest/Closure crest/Construction process control分类
建筑与水利引用本文复制引用
黄俊,马中将,高二强..银江水电站导流明渠截流戗堤龙口段的施工与过程控制[J].四川水力发电,2025,44(1):66-69,74,5.
