锦江水库溢洪道消能工的设计特点

Design features for the energy dissipator of spillway of Jinjiang Reservoir

以锦江水库第二溢洪道消能工设计为例,针对溢洪道轴线与河道垂直,水流挑射入河床后,可能冲刷对岸并产生回流、壅高水位,影响其他建筑安全运行等情况,采取理论计算与水工模型试验相结合的方法,找到了一种设置消力墙、预挖消能坑的综合消能措施,较好地解决了溢洪道挑流消能后的防冲问题,且节省了资金.经现场开闸放水测试,消能效果良好,对其他设施影响很小,达到了预期的目的.

The second spillway energy dissipator of Jinjiang Reservoir was used as the study case to analyze water current coupling, water level rising and damage caused by the abrasion erosion of a jet,trajectory current in case of the spillway axis perpendicular to the axis of the river. An energy,dissipating wall developed based on theoretical calculations and hydraulic modelling is presented in this article. This energy,dissipating measure with preliminarily excavating a dissipating pit has permitted the successful solution of the problems of water jet abrasion erosion. This measure underwent practical site testing. They have good results and less influence on other neighbouring facilities to be able to achieve the goal predetermined.