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红旗渠补源工程马家岩水库为高坝中型水库,挡水建筑物取当地材料,需设置放空洞以便于大坝检修。放空洞最大挡水水头61.54m、工作水头58.67m、弧门最大推力1776kN,且水流边界条件复杂,结合枢纽布置、水力模型试验及地质条件,合理选取了放空洞布置方案、结构型式,文章对影响工程运行安全的水力学问题进行了揭示和研究,采取了可行的处理措施。
The Hongqiqu Supplementary Project Majiayan Reservoir is a high-dam medium-sized reservoir. The retaining structures are made of local materials and need to be provided with emptying holes to facilitate overhaul of the dam. The maximum water blocking head of emptying tunnel is 61.54m, the working head is 58.67m, the maximum thrust of arc gate is 1776kN, and the boundary conditions of water flow are complex. Based on the layout of the hub, hydraulic model test and geological conditions, the layout scheme and structure type of the venting tunnel are reasonably selected. The hydraulic problems affecting the safety of the project are revealed and studied, and feasible measures are taken.