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洪屏抽水蓄能电站地下厂房地质条件复杂,洞室较多,为检验现有的防渗排水措施的预期渗控效果,利用改进的节点虚流量法求解有自由面的无压渗流问题,采用改进的排水子结构法模拟排水孔,通过计算正常运行工况、降雨入渗、改变排水孔间距等控制性因素,分析了不同条件下地下厂房渗流场的工作状态。结果表明,现有的防渗排水系统合理,可达到预期渗控效果。
The geological conditions of the underground powerhouse of Hongping Pumped Storage Power Station are complex and there are many caverns. To test the expected seepage control effect of the existing seepage-proof and drainage measures, an improved nodal void flow method is used to solve the problem of pressureless seepage with free surface. The improved drainage sub-structure method simulates the drainage holes. The working conditions of the seepage field of underground powerhouse under different conditions are analyzed by calculating the control factors such as normal operating conditions, rainfall infiltration and changing the spacing of drainage holes. The results show that the existing seepage control drainage system is reasonable and the expected seepage control effect can be achieved.