密云水库走马庄副坝渗流分析

Seepage Analysis of Zoumazhuang Auxiliary Dam in Miyun Reservoir

密云水库走马庄副坝自建成以来,经受住了60余年的运行考验。文章利用渗流观测资料,通过比较法、作图法,从测压管水位、坝区防渗效果、坝体浸润线、测压管位势、渗透稳定、等水位线等几方面,分析了大坝渗流变化、建筑物运行状态。结果表明:坝体测压管水位与库水位相关关系稳定,下游坝址排水处渗流溢出点稳定,渗流量与库水位相关关系良好。说明坝体防渗、排水设施工作正常。

Zoumazhuang Auxiliary Dam in Miyun Reservoir has withstood over 60 years of operational testing since its construction.In this paper,by using the data of seepage observation,through the method of comparison and drawing,the seepage change of the dam and the running state of the building are analyzed from several aspects,such as the water level of the pressure measuring pipe,the anti-seepage effect of the dam area,the saturation line of the dam body,the potential of the pressure measuring pipe,the seepage stability and the equal water level.The results show that the water level of the pressure pipe in the dam body is stable and correlated with the water level of the reservoir.The seepage outflow point at the downstream dam site is also stable,and the relationship between seepage flow and reservoir water level is good.These results indicate that the dam’s anti-seepage and drainage facilities are working normally.