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时间:2020-04-23
《北引渠首扩建工程引水防沙的试验研究-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第5期总第195期浙江水利科技No.5TDtalNo.1952014年9月ZhejiangHydrotechnicsSeptember2014北引渠首扩建工程引水防沙的试验研究胡海华,吉祖稳,董占地,王党伟(中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京100048)摘要:通过实体模型试验研究分析了取水枢纽修建前后江道的河床演变趋势,优化比较了取水枢纽及泄洪闸的不同布置方式,运用理论分析和试验2个方法研究了泄洪闸闸下极限冲刷能力及其消能防护措施,同时验证了取水枢纽修建后引水渠道的引水能力并提出了相应的防沙措施。试验结果表明,取水枢纽泄洪闸的布置是合理的,对江道水流特性及床
2、面冲淤变化的影响较小;设计引水闸的引水量可以达到149m3/s,能满足相应的设计要求。建议适当增加泄洪闸消力池和海漫的设计尺寸以满足实际需要;提出了采用泄洪闸拉沙可以降低鱼嘴附近的床面高程,从而有利于减少粗颗粒泥沙进入引水渠道的防沙措施。关键词:取水枢纽;河床演变;极限冲刷;引水防沙中图分类号:TV149文献标识码:A文章编号:1008—701X(2014)05—006104ExperimentStudyonWaterDiversionandSedimentControlofNorthCanalExpansionProjectHUHal—hua,JIZu—wen,DONGZhan—di,
3、WANGDang—wei(ChinaInstituteofWaterResourcesandHydropowerResearch,StateKey1.abomtoryofSimulationandRegulationofWaterCycleinRiverBasin,Beijing100048,China)/~stmet:Thispapermainlyanalyzestheevolutiontrendoffiverbedbeforeandaftertheconstructionofwaterintakeproject,andoptimizesthelayoutofwaterintakepr
4、ojectandsluicebycomparingthediferencethroughphysicalmodelexperimentstudy.Meanwhile,itexaminesthelimitscourabilityandprotectivemeasuresforenergydissipationofsluicebyusingtheoreticalanalysisandexperimentalresearch,andvei~esthediversioncapacityofthechannelaftertheconstructionofwaterintakeprojectandp
5、utforwardthecorrespondingsedimentcontrolmeasures.Theexperimentresultsshowthatthelayoutofwaterintakeprojectandsluiceisreasonable,anditislessafectedtheflowcharacteristicsoftheriverchannelandchangesinscouringandsiltingofthebedsurface;itismettherequirementsofthedesignthattheamountofwaterfordesignslui
6、ceVanreach149m3/s;itisrecommendedtoappropfiatelyincreasethedesignsizeofstillerandapronfortheactualneeds;themeaslM'eofsedimentcontrolisproposedthatscouringsedimentbyusingsluiceCanreducethebedsurfaceelevationnearFishMouthinordertoreducethecoarsesedimentintothediversionchanne1.Thisresearchprovidesth
7、escientificbasisandtechnicalsupportfortheoptimizationdesignofN0Canalexpansionproject.Keywords:waterintakeproject;riverbedevolution;limitscour;waterdiversionandsedimentcontrol程自1976年建成以来,对下游的工农业发展产生了巨大的1概述经济、社会效益。近年来随着下
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