闸门开启过程中消力池的时空水力特性

Spatio-temporal Hydraulic Characteristics of the Stilling Basin during Gate Opening Process

以大石桥水电站重力坝为例,采用比尺为1∶25的正态物理模型,针对典型的低水头重力坝闸门开启过程中消力池的时空水力特性问题进行试验研究。通过物理模型试验,获得了闸门开启过程中消力池流态、流速分布、底板压力等水力参数随时间的变化规律,验证了原型闸门开启速率的合理性。试验结果表明,消力池底板在闸门开启过程中是安全的,说明原型闸门开启速率设计合理。

Aiming at the spatio-temporal hydraulic characteristics of the stilling basin for a typical low-head gravity dam during the gate opening process,a normal physical model with a scale of 1∶25 is used to test and study the gravity dam of Dashiqiao Hydropower Station.The flow state,velocity distribution,bottom plate pressure and other hydraulic parameters in the opening process of the gates are obtained,and the rationality of the opening rate of prototype gate is verified.The experimental results show that the bottom plate of stilling basin is safe during the opening process of gates,indicating that the opening rate of prototype gate is designed to be reasonable.