排水系统对灰坝渗流与稳定的影响分析

Analysis of the Influence of the Drainage System on the Seepage and Stability of Fly-ash Dam

以河门口火电厂西沟灰场土坝为例,选择了两个控制断面及四种工况就其排水系统对坝体浸润线与坝坡稳定性的影响予以分析,认为灰坝上游铺设排水是保证坝坡稳定的关键,而当其上游排水失效时,坝基排水带对降低坝体浸润线和保持坝坡稳定效果显著,可见灰坝上游加坝基排水方式是符合其工程特点的。

In this paper,with the example of Hemenkou thermal power generation Xigou Dam,selecting 2 control cross section and 4 working conditions ,the influence of the drainage system on the saturation line and the stability of dam slope is analyzed.It is concluded that upstream drainage is the key of ensuring stability of dam slope.And when upstream drainage is invalid,dam base drainage is efficient to lower saturation line and keep stability of dam slope.So the drainage pattern of upstream and dam base is suitable for the engineering character of flyash dam.