深厚覆盖层河床截流问题探讨--以乌东德水电站截流模型试验研究为例  

Discussion on River Closure in Deep Covering--Taking the Closure Model Test of Wudongde Hydropower Station as an Example

作　　者：王智娟[1] 周赤[1] 宛良朋 姜伯乐[1] 魏红艳 WANG Zhijuan;ZHOU Chi;YUAN liangpeng;JIANG Bole;WEI Hongyan(Institute of Hydraulics,Changjiang River Scientific Research Institute,Wuhan,Hubei 430010,China;China Three Gorges Construction Management Co.,Ltd.,Yichang,Hubei 443100,China)

机构地区：[1]长江科学院水力学研究所,湖北武汉430010 [2]中国三峡建设管理有限公司,湖北宜昌443100

出　　处：《水利与建筑工程学报》2021年第5期63-67,共5页Journal of Water Resources and Architectural Engineering

基　　金：中国三峡建设管理有限公司科研项目“乌东德水电站防渗墙施工平台过流和围堰挡水期导流水力学原型监测和模型试验对比分析科研项目”(WDD/0485)。

摘　　要：在抗冲能力较差的深厚覆盖层的河床截流时,底部覆盖层的冲刷可能加大戗堤失稳风险。以乌东德水电站截流模型试验研究为基础,概括总结了深厚覆盖层河床截流试验研究时需关注的几个关键问题:首先,龙口的确定及裹头防护需考虑覆盖层稳定;其次,截流困难段与危险区域的判断受覆盖层因素影响;第三,戗堤进占量计算需考虑覆盖层流失,并提供了计算方法。通过三个问题探讨,增加模型试验研究数据可靠性,为深厚覆盖层条件下的截流试验和施工提供一定的借鉴。When dealing with Riverbed which was intercepted by deep overburden with poor anti scour ability,the scour of the bottom overburden may increase the risk of berm instability. Based on the experimental study on the closure model of Wudongde Hydropower Station,several key problems in the experimental study of river bed closure with deep overburden are summarized. Firstly,the stability of overburden should be considered in the determination of closure and head wrapping protection. Secondly,the judgment of difficult closure section and dangerous area is affected by overburden factors. Thirdly,overburden loss should be considered in the calculation of berm advance. The calculation method is provided. Through the discussion of three problems,the reliability of model test data is increased,which provides a certain reference for closure test and construction under the condition of deep overburden.

关 键 词：截流 深厚覆盖层 冲刷 戗堤稳定 

分 类 号：TV855[水利工程—水利水电工程]