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1、第15卷第3期南水北调与水利科技Vol.15No.32017年6月South2to2NorthWaterTransfersandWaterScience&TechnologyJun.2017DOI:10.13476/j.cnki.nsbdqk.2017.03.027赵相航,解宏伟,顾声龙,等.台阶式溢流坝消力池压强特性试验研究[J].南水北调与水利科技,2017,15(3):1652170.ZHAOXiang2hang,XIEHong2wei,GUSheng2long,etal.Experimentalstudyonpressurecha
2、r2acteristicsinstillingbasinofsteppedspillway[J].South2to2NorthWaterTransfersandWaterScience&Technology,2017,15(3):1652170.(inChinese)台阶式溢流坝消力池压强特性试验研究赵相航,解宏伟,顾声龙,贺巨龙,郭馨(青海大学水利电力学院,西宁810016)摘要:为研究台阶式溢流坝不设反弧段连接时消力池底板压强特性,结合某水库实际工程,采用物理模型试验方法,对台阶式溢流坝消力池底板时均压强、脉动压强强度和峰值等压强特性
3、进行了研究。结果表明,消力池底板时均压强均为正值;在滑行水流和过渡水流时,时均压强在水流冲击区出现一个较大值,最大为01926kPa,下游反弹区形成极小值;在跌落水流时,时均压强沿程变化较小,且随流量的增加而增大;脉动压强强度和峰值沿程变化规律基本一致,总体上随流量的增加而增大,最大值出现在水流冲击区,脉动压强最大为11198kPa,随后沿下游方向逐渐减小,并趋于稳定;台阶尺寸对消力池底板时均压强和脉动压强影响不大;消力池内脉动优势频率为0101~4Hz,属低频振动,不会危害泄水建筑物的安全。研究成果可为台阶式溢流坝消力池的优化设计提供参
4、考。关键词:消力池;台阶式溢流坝;时均压强;脉动压强;频率中图分类号:TV135.2文献标识码:A文章编号:167221683(2017)0320165206ExperimentalstudyonpressurecharacteristicsinstillingbasinofsteppedspillwayZHAOXiang2hang,XIEHong2wei,GUSheng2long,HEJu2long,GUOXin(SchoolofWaterResourcesandElectricPower,QinghaiUniversity,Xinin
5、g810016,China)Abstract:Tostudythepressurecharacteristicsinthestillingbasinofasteppedspillwaywithoutanti2arc,wechoseareservoirandusedthephysicalmodeltestmethodtostudythepressurecharacteristicsincludingtime2averagepressure,fluctuatingpres2sureintensity,andpeakpressurepulsat
6、ioninthestillingbasinofasteppedspillway.Theresultsshowedthatallthetime2aver2agepressurewaspositiveinthestillingbasin.Whentheflowregimewasskimmingflowandtransitionflow,thetime2averagepressurebecamelargeintheflowimpactarea,reachingamaximumof0.926kPa;itreachedtheminimuminthe
7、downstreamre2boundzone.Thetime2averagepressurevariedslightlywhentheflowregimewasnappeflow,andincreasedwiththeincreaseofflow.Thevariationpatternsofthefluctuatingpressureintensityandpeakpressurewerebasicallyconsistent.Theybothin2creasedwiththeflowonthewhole.Themaximumvaluea
8、ppearedintheflowimpactzone.Themaximumfluctuatingpressurewas1.198kPa.Itthendecreasedgraduallyinth
