张峰水库初期蓄水大坝坝体渗流安全监测分析

Safety Monitoring Analysis on Seepage Flow in Dam Body in Primary Storage Period of the Zhangfeng Reservoir

通过对大坝坝体渗压计观测数据与库水位相关性分析和黏土心墙防渗效果、坝基渗流情况等进行分析,表明绝大部分渗压计测值正常,渗流观测资料可靠;心墙防渗效果良好,浸润线经过心墙后水头降幅较大,大坝目前工作性态正常;基岩渗透性较小,坝基防渗可以保证;后期蓄水应重点加强对坝体及大坝基础渗流异常情况监测分析,确保大坝安全。

The paper analyzes the relativity among the data obsevated by osmometer for seepage flow of dam body and the reservoir water level,the seepage control effect of the clay core wall and seepage flow situation in dam foundation.The anaylsis results indicate that most of the observation values of osmometers are normal;the observation data of seepage flow are reliable ; the seepage control effect of core wall is good ; the decrease range of seepage line which passes through the core wall is large;so that dam＇s operation situation is normal;the seepage ability of rock foundation is lower and the seepage control of dam foundation can be ensured.In the later period of storage, the monitoring analysis on abnormal situations that occur in dam body and dam foundation must be strengthened to ensure dam safety.