湖南镇水电站设计及主厂房构架结构计算

摘要乌溪江水电站坐落于浙江省乌溪江，湖南镇，属于梯级开发电站，根据地形要求，其开发方式为有压引水式。坝区地质条件较好，主要建筑物（混凝土非溢流坝），泄水建筑物（混凝土溢流坝），引水建筑物（有压引水遂洞，调压室），地面厂房。水库校核洪水位239.5m（万年一遇），相应的下泄流量9700m3/s；设计洪水位238.2m（千年一遇），相应的下泄流量5500m3/s；设计蓄水位231.5m。本设计确定坝址位于山前峦附近，非溢流坝坝顶高程241m，坝底高程113.0m，最大坝高128m，上游折坡坡度为1：0.2，下游坝坡坡度为1：0.76，溢流坝堰顶高程225m。引水隧洞进口位于坝址上游凹口处，遂洞全长1200m。洞径9.1m，调压室位于厂房上游200m左右处，高程250m的山峦上，型式为差动式。厂房位于下游狄青位置。设计水头99.38m，装机容量4×4.5=18万kw，主厂房总宽21m，总长58m。水轮机安装高程116.32m，水轮机层地面高程118.76m，发电机层高程125.27m，装配场层高程130.00m，高于下游校核洪水位129.50m，故无需在下游设挡水墙。厂房附近布置开关站，主变等。受地形限制，尾水平台兼作公路用，坝址与厂区通过穿山隧道连接，形成枢纽体系。另外，本设计还对调压室结构计算并绘制了调压室布置图。关键词：水利枢纽；挡水建筑物；泄水建筑物；稳定；应力；水轮机；选型；引水隧洞；调压室；厂房。湖南镇水电站设计及主厂房构架结构计算-2-AbstractTheWuxijianghydropowerstationislocatedinHuNanTowninZheJiangprovince,whichbelongstoachainofexploitation.Accordingtothedemandoftopographicform,Ichoosediversionhydropowerstation.Thegeologyconditionisgood.Themainconstructionconcludethewaterretainingstructure(theconcretenon–over-falldam),thereleaseworks(theconcreteover–falldam),thediversionstructure(pressureseepagetunnel,thesurge-chamber),andthesurfacepowerstation.Thechecklevelis239.5m,itscorrespondingflowis9700m3/s.Thedesignwaterlevelis238.2m,itscorrespondingflowamountis5500m3/s.Theregularwaterretaininglevelis231.5m.Thedamsiteisneartheformersaddle.Thecrestelevationofthenon-over-falldamis241m,andthebaseelevationis113.0m,Themaxheightofthedamis128m,Theupstreamdamslopeis1:0.2,thedownstreamdamslopis1:0.76,thespillwaycrestelevationis225m.Theinduceroftheseepagetunnelislocatedattherecessplace,Thelengthoftunnelis1200m,thediametricofwhichis9.1m.Thesurge-chamberislocatedatthemountain,whichis200mfromtheworkshopbuildingandistypeisdifferentialmotion.Theworkshopbuildingislocatedatdownstream,thedesignleveloftheturbineis99.38m,theequippedcapacitoris4×4.5=18kw,thecleanwidthis21m,itswholelengthis58m.Thefixleveloftheturbineis116.32m,theheightofhydraulictrbineis118.76m,andtheheightofdynamois125.27m,theleveloftheadjustmentbayishigher，(andhigherthanthedownstreamwaterlevel129.50m).Soitisn’tnecessarytosetupinthelowerreachesoftheretainingwall.Neartheworkshopbuilding,thereareswitchstationandthemaintransformerandsoon.Inaddition,thedesignstructureofthesurgetankisalsocalculatedandplottedthesurgetanklayout水利水电工程专业毕业设计-3-Keywords:watercontrol;waterretainingstructures;dischargestructure;stability;stress;turbine;selection;diversiontunnel;surgechamber;plant.目录摘要........................................................................................................................1Abstract.....................................................................................................................2第一章设计基本资料............................................................................................61.1流域概况和水电站位置.............................................................................................................61.2水文与气象.................................................................................................................................61.2.1水文条件......................................................................................61.2.2气象条件......................................................................................91.3湖南镇工程地质.........................................................................................................................91.4当地建筑材料..............................................................................................................................101.5交通状况.....................................................................................................................................101.6既给设计控制数据......................................................................................................................10第二章水能规划.................................................................................................112.1特征水头、、的选择........................................................................................112.1.1Hmax的选择...................................................................................112.1.2Hmin的选择..................................................................................122.1.3平均水头avH的确定...................................................................132.1.4设计水头Hr的确定......................................................................142.2水轮机型号选择..........................................................................................................................142.2.1HL200型水轮机方案主要参数选择............................................142.2.2HL180型水轮机方案主要参数选择...........................................172.3水轮机方案的比较分析.............................................................................................................19第三章枢纽布置、挡水及泄水建筑物..............................................................20湖南镇水电站设计及主厂房构架结构计算-4-3.1非溢流坝.....................................................................................................................................203.1.1剖面设计.......................................................................................203.1.2廊道及排