河床式水电站设计及混凝土蜗壳结构计算.docx

中文摘要沙溪口水电站计划建在福建省南平市上游的西溪上，是闽江流域的一个梯级电站，属于河床式水电站。本电站主要组成建筑物有溢流坝、非溢流坝、厂房和船闸。坝体型式为混凝土重力坝，溢流坝段布置于河床中部，厂房布置在河床右岸，船闸布置在左岸。非溢流坝坝顶高程93m，上游面坡度为1:0.2，下游面坡度1:0.80，溢流坝堰顶高程82.78m。溢流坝段全长340m，设有18孔溢流孔，每孔净宽取为17.0m，沿主河槽宣泄绝大部分洪水。水库正常蓄水位为88.00m，设计洪水位为90.00m，校核洪水位为91.00m，死水位为84.00m。电站设计水头为10.3m，总装机容量为320MW，安装有4台轴流式水轮发电机组，每台装机容量为8MW。水轮机型号均为ZZ560-LH-850，转轮直径为8.5m，水轮机安装高程66.47m，发电机层高程86.005m，取安装场高程与发电机层同高。下游校核洪水位81.50m，主厂房顶高程为108.00m，厂房总长148.2m，宽74m。220kV及110kV开关站布置在尾水平台右侧。船闸闸室100m×20m×2.5m（长×宽×最小水深），位于溢流坝左侧。沙溪口水电站具备发电，航运，过木等的综合效益，是福建电网的骨干电厂。关键词沙溪口水电站、河床式厂房、重力坝、溢流坝、水轮机、发电机、抗滑稳定性、扬压力、轴流式水轮机、发电机层结构设计AbstractShaxikouHydropowerStationispreparedtobuiltatXixistream,upstreamthecityofNanpinginFujianProvince.HYPERLINK"http://www.ecidi.com/english/slsd/images/shaxikou.jpg"\t"_blank"ItisoneofthecascadedevelopmentintheMinjiangriverbasin.Itisapowerhouseinriverchannel.ThemainstructuresofShaxikouHydropowerStationisconsistofoverflowspillwaydam,non-overflowspillwaydam,powerhouseandlock.Thedamsareconcretegravitydams.Theoverflowspillwaydamliesinthecentreoftheriverbed.Thepowerhouseliesontheright,andthelockislocatedontheleft.Thetopofthenon-spillwaydamisatanelevationof93meters.Theupstreamofthedamisvertical,thelowerslopedegreeis1:0.2,andtheupperslopedegreeis1:0.80.thecrestoftheweirisatanelevationof82.78meters.Theoverflowspillwaydamisabout340meterslongintotal,with18openingseachof17meterswide,dischargingmostofthefloodflowalongthemainriverchannel.Thenormalwaterleverofthereservoiris88.00meters,whilethedesignfloodwaterlevelofthereservoirreachesat90.00meters.Thecheckingfloodwaterlevelisabout91meters.Andthedeadwaterlevelisonly84.00meters.Thedesigncross-headis10.3meters.Theprojecthasatotalinstalledcapacityof320MW.Ithousesfouraxial-flowturbinescoupledwithgenerators8MWeach.ThetypeoftheturbineisZZ560-LH-850.Thediameteroftheturbineis8.50meters.Therunnersettingisatanelevationof66.47meters.Thegeneratorfloorisatanelevationof86.005meters.Anditisthesamewiththeserviceorerectionbay.However,thecheckingtailwaterleveris81.5meter