洞坪水电站大坝坝基扬压力监测资料分析

Analysis of the Uplift Pressure Monitoring Data on Dam Foundation of Dongping Hydropower Station

通过对洞坪水电站大坝坝基扬压力监测资料整编、定性和定量分析,找出大坝坝基扬压力分布与变化规律和折减情况,坝基扬压力主要受上游水位和温度变化影响。河床坝段坝基扬压力分布规律合理,坝基坝肩防渗帷幕和排水幕对水头的折减效果显著,但在今后的运行管理中仍需对部分扬压力水位较高的部位加强监测分析和巡视检查。

Through the compilation and qualitative and quantitative analysis of the uplift pressure monitoring data on the dam foundation of Dongping Hydropower Station,the distribution,variation and reduction conditions of the uplift pressure are determined.It is found that the uplift pressure on dam foundation is mainly affected by the variations of the upstream water level and the temperature.The uplift pressure distribution on dam foundation in riverbed dam sections is reasonable.The anti-seepage curtain and drainage curtain in the dam abutment have significant reduction effects on the uplift water head.However,it is still necessary to emphasize the monitoring,analysis and patrol inspection of locations with high uplift water level in the future operation management.