前坪水库泄洪洞泄流能力及冲刷消能试验研究  

Experimental Study on Discharge Capacity and Scouring Energy Dissipation of Spillway Tunnel in Qianping Reservoir

作　　者：赵雪萍 李宜伦 赵玉良 李松平 袁群 贾文博 苏晓玉 ZHAO Xueping;LI Yilun;ZHAO Yuliang;LI Songping;YUAN Qun;JIA Wenbo;SU Xiaoyu(Henan Provincial Water Conservancy Research Institute,Zhengzhou 450003,China;Henan Keda Water Conservancy Survey and Design Co.,Ltd.,Zhengzhou 450003,China;School of Environment Studies,China University of Geosciences(Wuhan),Wuhan 430074,China;Henan Key Laboratory of Water Conservancy Engineering Safety Technology,Zhengzhou 450003,China)

机构地区：[1]河南省水利科学研究院,河南郑州450003 [2]河南省科达水利勘测设计有限公司,河南郑州450003 [3]中国地质大学(武汉)环境学院,湖北武汉430074 [4]河南省水利工程安全技术重点实验室,河南郑州450003

出　　处：《人民黄河》2021年第4期134-136,共3页Yellow River

基　　金：河南省水利科技攻关计划项目(GG201847)。

摘　　要：为了验证前坪水库泄洪洞原布置方案的合理性,根据弗劳德定律,采用1∶40的单体正态模型进行试验,研究了泄洪洞各试验工况下的泄流能力、时均压力分布、水面线及洞身余幅、消能防冲效果等。结果表明:前坪水库泄洪洞泄流能力满足要求;泄洪洞检修闸门槽最小空化数1.23,大于闸门初生空化数0.7,闸门槽设计合理,满足规范要求;泄洪洞洞身掺气水深均小于直墙高度,洞身余幅均大于15%,满足设计和规范要求;校核工况下,泄洪洞冲坑最深点高程为327.34 m,水流对下游山体造成一定的冲刷,需要对山体采取抗冲刷措施。In order to verify the rationality of the original layout scheme of the spillway tunnel of Qianping Reservoir,according to Froude’s law,the discharge capacity,time average pressure distribution,water surface profile and residual amplitude of tunnel body,energy dissipation and scour prevention under various test conditions were studied by using a 1∶40 monomer normal model.The test results show that the discharge capacity of the spillway tunnel of Qianping Reservoir meets the requirements,and the minimum cavitation number of the maintenance gate slot of the spillway tunnel is 1.23,which is 0.7 greater than that of the initial cavitation number.The gate slot design is reasonable and meets the requirements of the specification.The aerated water depth of the flood discharge tunnel body is less than the height of the vertical wall,and the residual amplitude of the tunnel body is more than 15%,which meets the design and specification requirements.Under the check condition,the elevation of the deepest point of the flood discharge tunnel is 327.34 m,and the water flow causes certain scouring on the downstream mountain,so it is necessary to take anti scouring measures for the opposite mountain.

关 键 词：模型试验 泄流能力 水流空化数 洞身余幅 冲刷坑 前坪水库 

分 类 号：TV131.61[水利工程—水力学及河流动力学]