增设检修平台对泄洪消能影响的水力特性试验研究

摘要

In order to study the influence of adding a maintenance platform in the end of the stilling basin for flood discharge and energy dissipation in the dam of low water head, great unit width,low Froude number and the big gap of downstream water level fall, tests have been made in Xihe hydropower station by the hydraulic model method for arrangements of no maintenance platform and of three maintenance platforms of different elevations respectively. During the tests, the discharge capacity, flow pattern, flow, pressure, downstream erosion, and other variables of hydraulic characteristics in different arrangements are analyzed and compared to obtain the best maintenance platform elevation. The study in this paper can provide some references for the similar projects in the future.%为了研究低水头、大单宽、低弗汝德数、下游水位落差变幅大的闸坝工程在其表孔消力池末端增设检修平台对泄洪消能的影响,以喜河水电站为例,采用水工模型试验的方法,对比进行了未设检修平台以及增设三个不同高程的检修平台等方案的试验,分析研究了在不同高程的检修平台下其泄流能力、流态、流速、压强、下游冲刷等水力特性的变化规律,试验最终得到了检修平台的最佳高程,希望能为以后的类似工程提供一定的借鉴意义.