地震前后大坝安全评估与方法研究

Study on Dam Safety Assessment Method Before and After Earthquake

渗漏是影响土石坝安全运行的关键。为掌握震后甘肃皇城水库的渗流状况,确保工程安全,采用注水试验和人工比测等手段评价大坝渗流压力监测数据的可靠性,在此基础上,通过绘制过程线、浸润线等图形对渗流监测资料进行了分析。结果表明,两岸绕渗测点水位与库水位相关性较好,两岸绕渗监测部位渗流稳定,大坝防渗系统防渗效果较好,各断面下游坝坡渗流处于安全状态,本次地震未破坏大坝防渗系统。

Seepage is the key to the safe operation of earth-rack dam. In order to master the seepage condition of Huangcheng Reservoir in Gansu Province after the earthquake and ensure the safety of the project, the reliability of the seepage pressure monitoring data of the dam is evaluated by means of water injection test and artificial comparison measurement. On this basis, the seepage monitoring data are analyzed by drawing the process line and infiltration line. The results show that there is a good correlation between the water level of the seepage measuring point around the two sides and the reservoir water level. The seepage of the seepage monitoring site around the two sides is stable, and the seepage control effect of the dam seepage control system is comparatively good. The seepage of the downstream dam slope of each section is in a safe state, and the earthquake did not damage the dam seepage control system.