故县水库大坝渗流分析

故县水库大坝为混凝土重力坝,针对大坝渗流监测项目及运行情况,通过对该工程坝基扬压力、大坝渗流量和绕坝渗流等三方面进行分析,得出F5断层C445-3管水位持续升高,应该引起重视;河床坝段扬压力水位较低,河床坝段排水系统完善,运行正常;岸坡坝段、河床坝段扬压系数均小于设计值0.3,满足设计要求和大坝安全要求;坝基渗流量较小,没有产生较大的集中渗流,大坝帷幕灌浆效果良好,坝基渗流稳定可靠。

Analysis on Dam Seepage of Guxian Reservior

The dam of Guxian Reservoir is a concrete gravity dam.According to the monitoring data and operation records of the dam seepage,the uplift pressure of seepage discharge and bypass seepage of the dam are analyzed.The following results are obtained:(1) The water level of C445-3 is rising continuously on the site of F5 fault,which should be taken more attentions to;(2) The uplift pressure of the river bed is lower,and the operation of drainage facilities is well;(3) The coefficients of the uplift pressure on the river bed and bank are little than 0.3,which could meet the requirements of design standard and dam safety;(4) The seepage of the dam foundation is steady,so there is no seepage concentration.Because the effect of the curtain grouting is well,and the seepage discharge is smaller,so the dam foundation is stable and reliable.