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1、第47卷第2期武漢大學(xué)學(xué)報(bào)(工學(xué)版)Vol.47No.22014年4月EngineeringJournalofWuhanUniversityApr.2014文章編號(hào):1671-8844(2014)02-0156-04尼泊爾上馬蒂水電站取水防沙試驗(yàn)劉彬1,楊磊1,徐宏亮1,張志強(qiáng)2,戴晨3,詹義正1(1.武漢大學(xué)水資源與水電工程科學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室,湖北武漢430072;2.上??睖y(cè)設(shè)計(jì)研究院,上海200000;3.中國(guó)水利電力對(duì)外公司,北京100120)摘要:上馬蒂水電站位于尼泊爾西部馬蒂河上,河道來水量懸殊,水位變化較大,常年來流量及更小流量
2、情況下取水極其困難.馬蒂河屬于多沙河流,且工程河段寬淺、坡陡,加劇了河道推移質(zhì)泥沙運(yùn)動(dòng).為了解決不同工況下電站取水、防沙問題,試驗(yàn)研究中,在電站首部樞紐上游布置取水口、引水渠、鎖壩等建筑物,并加高溢流堰前隔水墻的高程.同時(shí),在沉沙池內(nèi)增設(shè)整流格柵后,懸移質(zhì)分組沉降率得到提高,滿足水輪機(jī)過沙要求.這種“逆向引水、正面排沙”的工程布置方式為解決山區(qū)多沙河流取水防沙問題提供了一種新的途徑.關(guān)鍵詞:推移質(zhì);懸移質(zhì);沉降率;取水防沙中圖分類號(hào):TV6文獻(xiàn)標(biāo)志碼:AExperimentonwaterdiversionandsedimentpreventi
3、onofNepalUpperMadiHydroelectricStation1,YANGLei1,XUHongliang1,ZHANGZhiqiang2,DAIChen3,ZHANYizheng1LIUBin(1.StateKeyLaboratoryofWaterResourcesandHydropowerEngineeringScience,WuhanUniversity,Wuhan430072,China;2.ShanghaiInvestigation,Design&ResearchInstitute,Shanghai200000,Chi
4、na;3.ChinaInternationalWater&ElectricCompany,Beijing100120,China)Abstract:UpperMadiHydroelectricStationislocatedontheMadiRiver,inwesternNepal.Dischargeandthewaterleveloftherivervarieswidely,whichresultingextremelydifficultconditionsforwaterdiversionunderperennialflowandasma
5、llerflow.MadiRiverbelongstothesandyriver,andhasabroadandshal-lowriverbedinengineeringarea,whichaggravatingthemovementoftheriverbedloads.Tosolvetheproblemsofwaterdiversionandsedimentpreventionunderdifferenttestcasesforhydropowerstation,wa-terintake,diversionchannel,lockdaman
6、dotherstructuresareadoptedintheexperimentstudy,andtheelevationofthetrainingwallbeforetheoverflowweirhasbeenheightenedtoo.Atthesametime,anaddi-tionalperforateddistributionplateisadoptedindesiltingbasin,whichimprovessedimentationrateofgroupingsuspendedsediment,andmeetsthesand
7、requirementsoftheturbine.Thisengineeringlayoutnamed“reversewaterdiversion,positivesedimentdesilting”providesanewapproachtosolvethewaterdiversionandsedimentpreventionproblemofthemountainoussandyriver.Keywords:bedload;suspendedsediment;sedimentationrate;waterdiversionandsedim
8、entprevention上馬蒂水電站位于尼泊爾西部馬蒂河,沿河段力鋼管、電站廠房、開關(guān)站和道路工程.首部樞紐由從上至下包括壩址首部樞紐、引水隧洞、調(diào)壓井、壓開敞式