江坪河水电站导流洞衬砌失效条件下涌水量计算及预测分析  

Calculation and Prediction Analysis of Diversion Tunnel Water Inflow under Lining Failure of Jiangpinghe Hydropower Station

作　　者：龚亚琦[1,2] 苏海东[1,2] 李家正[1,2] GONG Yaqi;SU Haidong;Li Jiazheng(Material and Engineering Structure Department,Yangtze River Scientific Research Institute,Wuhan 430010,Hubei,China;Research Center on Water Engineering Safety and Disaster Prevention of Ministry of Water Resources,Wuhan 430010,Hubei,China)

机构地区：[1]长江科学院材料与结构研究所,湖北武汉430010 [2]水利部水工程安全与病害防治工程技术研究中心,湖北武汉430010

出　　处：《水力发电》2020年第6期66-68,共3页Water Power

基　　金：国家自然科学基金资助项目(514090120)。

摘　　要：最大涌水量的测算是江坪河水电站导流洞应急抢险排水预案设计的关键问题。为此,分别采用解析方法和有限元数值方法预测了江坪河水电站导流洞衬砌失效的极端假设条件下导流洞的涌水量,通过两个方法计算结果对比,验证了解析方法求解方形断面隧洞涌水量的适用性,进而对不同渗透系数进行敏感性分析。结果表明,在不考虑灌浆且围岩渗透系数一定的条件下,江坪河水电站导流洞涌水量随着初期支护渗透系数的降低而不断减小;同时,预测了不同渗透系数对应的最大涌水量,可为应急抢险设计提供参考依据。The prediction of maximum water inflow is the key issue in the design of emergency drainage plan for diversion tunnel of Jiangping he Hydropower Station. To this end, the analytical method and the finite element numerical method are used to predict the water inflow of the diversion tunnel of Jiangpinghe Hydropower Station under the extreme assumption of the failure of lining respectively. By comparing the calculation results of two methods, the applicability of the analytical method to solve the water inflow of tunnel with square section form is verified, and then the sensitivity analysis of different permeability coefficients is carried out. The results show that the amount of water inflow of the diversion tunnel of Jiangpinghe Hydropower Station decreases continuously with the decrease of the initial support permeability coefficient under the condition that the permeability coefficient of surrounding rock is fixed and the grouting is not considered. Simultaneously, the maximum water inflows corresponding to different permeability coefficients are predicted, which can provide references for emergency design.

关 键 词：涌水量 解析解 数值模拟 导流洞 江坪河水电站 

分 类 号：TV698.1[水利工程—水利水电工程] TV263