尼泊尔上马蒂水电站取水防沙试验
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第47卷第2期2014年4月武汉大学学报(工学版)
Engineering
Journal of Wuhan UniversityVol.47No.2
Ap
r.2014收稿日期:2013-07-
28作者简介:刘彬(1989-),男,硕士研究生,主要从事施工水力学与导流工程研究,E-mail:liubin317328@163.com.通讯作者:杨磊(1974-),男,博士,副教授,主要从事导截流试验研究及水利工程施工组织管理,E-mail:lylshow@whu.edu.cn.
基金项目:国家自然科学基金项目(编号:50809052).
文章编号:1671-8844(2014)02-0156-
04尼泊尔上马蒂水电站取水防沙试验
刘彬1,杨磊1,徐宏亮1,张志强2,戴晨3,詹义正1
(1.武汉大学水资源与水电工程科学国家重点实验室,湖北武汉 430072;2.上海勘测设计研究院,上海 200000;3.中国水利电力对外公司,北京 100120
)摘要:上马蒂水电站位于尼泊尔西部马蒂河上,河道来水量悬殊,水位变化较大,常年来流量及更小流量情况下取
水极其困难.
马蒂河属于多沙河流,且工程河段宽浅、坡陡,加剧了河道推移质泥沙运动.为了解决不同工况下电站取水、
防沙问题,试验研究中,在电站首部枢纽上游布置取水口、引水渠、锁坝等建筑物,并加高溢流堰前隔水墙的高程.同时,在沉沙池内增设整流格栅后,悬移质分组沉降率得到提高,满足水轮机过沙要求.这种“逆向引水、正面排沙”的工程布置方式为解决山区多沙河流取水防沙问题提供了一种新的途径.
关键词:推移质;悬移质;沉降率;取水防沙中图分类号:TV
6 文献标志码:AExperiment on water diversion and sediment p
revention ofNepal Upper Madi Hy
droelectric StationLIU Bin1,YANG Lei 1,XU Hongliang1,ZHANG Zhiqiang2,DAI Chen3,ZHAN Yizheng
1
(1.State Key Laboratory of Water Resources and Hydropower Engineering
Science,Wuhan University,Wuhan 430072,China;2.Shanghai Investigation,Design &Research Institute,Shang
hai 200000,China;3.China International Water &Electric Company,Beijing
100120,China)Abstract:Upper Madi Hydroelectric Station is located on the Madi River,in western Nepal.Discharg
e andthe water level of the river varies widely,which resulting extremely difficult conditions for water diversionunder perennial flow and a smaller flow.Madi River belongs to the sandy
river,and has a broad and shal-low riverbed in engineering area,which aggravating the movement of the river bedloads.To solve theproblems of water diversion and sediment p
revention under different test cases for hydropower station,wa-ter intake,diversion channel,lock dam and other structures are adopted in the experiment study,and theelevation of the training
wall before the overflow weir has been heightened too.At the same time,an addi-tional perforated distribution plate is adopted in desilting basin,which improves sedimentation rate ofgrouping suspended sediment,and meets the sand requirements of the turbine.This engineering
layoutnamed“reverse water diversion,positive sediment desilting”provides a new approach to solve the waterdiversion and sediment prevention problem of the mountainous sandy
river.Key words:bedload;suspended sediment;sedimentation rate;water diversion and sediment prevention 上马蒂水电站位于尼泊尔西部马蒂河,
沿河段从上至下包括坝址首部枢纽、
引水隧洞、调压井、压力钢管、电站厂房、开关站和道路工程.首部枢纽由开敞式溢流堰、
右岸岸边式冲沙闸、右岸沉沙池、右