石泉水电站混凝土重力坝渗流监测资料分析

Analysis of Seepage Monitoring Data of Concrete Gravity Dam of Shiquan Hydropower Station

为系统评价石泉水电站混凝土重力坝稳定性,采用多元回归分析法量化了坝基扬压力及坝体渗漏量的影响因子,揭示了多年运行重力坝的渗流变化规律。在此基础上,通过实测扬压力强度系数与设计值对比、时效渗漏量大小等评估了大坝长期运行稳定性。结果表明:蓄水40多a以来,坝体渗流规律主要与库水位有关,大坝扬压力实测值、时效渗漏量均低于设计控制值,重力坝的结构性态变化基本正常,满足设计要求。分析方法与结果为类似工程设计、施工、运行管理提供了有益参考。

In order to systematically evaluate the stability of the concrete gravity dam of Shiquan Hydropower Station,the multivariate regression analysis method is used to quantify the influence factors of the dam foundation lifting pressure,dam body leakage and seepage change around the dam after years of operation.On this basis,the long-term operation stability of the dam was evaluated by comparing the measured uplift pressure intensity coefficient with the design value,and the aging leakage volume.The results show that since the impoundment for more than 40 years,the seepage law of the dam is mainly related to the reservoir water level,both the measured value of the dam lifting pressure and the aging leakage are lower than the design control value.The structural behavior of the gravity dam is basically normal and meet the design requirement.The analysis method and results provide a useful reference for the design,construction,and operation management of similar projects.