新集水电站泄洪消能防冲刷优化研究  

Experimental Research on the Optimization of Flood Discharge Energy Dissipation and Scour of Xinji Hydropower Station

作　　者：王亚洲 王均星[1] 周招 李双 李辉成 WANG Ya-zhou;WANG Jun-xing;ZHOU Zhao;LI Shuang;LI Hui-cheng(State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室

出　　处：《中国农村水利水电》2019年第8期197-203,共7页China Rural Water and Hydropower

摘　　要：在低水头、大单宽流量泄洪建筑物下游普遍存在河床冲刷等问题,结合新集水利枢纽工程、利用水工物理模型试验,通过对比分析原消力池(由连接闸室底板的斜坡段和带尾坎的水平护坦组成)和T型墩+尾坎联合消能工两种方案消力池段及海漫段的流速分布、消力池消能率、流场分布及下游河床冲刷情况,得到以下结论:T型墩+尾坎联合消能工通过扩散和挑起水流,增大池内消能比重,削弱波状水跃[1],降低了出池流速,并在海漫段形成二次水跃,大幅提高了整个消能段消能率,下游河床冲刷明显降低。该消能工优化设计方案为工程的消能优化研究提供了强有力的依据。Riverbed erosion is a common problem in the lower reaches of flood discharge structures with low water head and large single wide flow.Based on Xinji Water Conservancy Hub Project,by using hydraulic physical model tests,through the original analysis of stilling basin(by connecting the lock chamber bottom slope section and tail of camp level apron)and T type pier+tail,the joint energy dissipation stilling basin for two options section and stilling basin for the sea flood period of velocity distribution,energy dissipation,the flow field distribution and the downstream river bed scour situation,the following conclusions have been drawn:The T-type pier+tail sill combined energy dissipator increases the energy dissipation in the pool by diffusing and plucking the water flow,weakening the wavy water jump[1].The joint energy dissipator reduces the flow velocity of the outlet and formed a secondary water jump in the diffuse section of the sea,which greatly increases the energy dissipation rate of the entire energy dissipation section,and the downstream riverbed erosion decreased significantly.The energy dissipator optimization design provides a strong basis for engineering energy dissipation optimization research.

关 键 词：消力池 海漫 T型墩 消能 冲刷 水跃 

分 类 号：TV131[水利工程—水力学及河流动力学]