附加荷载对边坡稳定影响的二维有限元分析

坡顶附加荷载是边坡失稳的一个极其重要的诱发因素。采用Geo-Studio分析软件,在不同荷载大小、不同作用位置以及不同的荷载作用长度三种情况下对边坡的稳定性进行对比分析。研究发现,对于不同的荷载大小,荷载边界距离坡顶边界约5m以上为安全范围。当荷载边界移至距坡顶边界5m范围以内时,边坡的安全系数出现骤降,荷载越大,安全系数降幅就越大。对于同一荷载大小,荷载作用长度对边坡的稳定影响不显著,荷载边界距坡顶边界始终为约5m以上的安全范围。对于工程上路堤填方,坡顶临时堆放材料以及新建构筑物等工程的实施具有极其重要的参考价值。

2-D Finite Element Analysis of the Surcharged Slopes

The surcharge load acting on the crown of the slopes is one of the important trigger factors of the slope failures. Acomparative slope study is performed with different intensity of the surcharge loads, different locations and loading length by u-sing software Geo Slope. The results indicate that a stable slope can he obtained if the loads with different intensities are atleast 5 meters away from the edge the top of slope. The factor of safety for the slope stability will reduce rapidly if the surcharge load is within 5 meters to the edge. Larger load results in a larger factor of safety reduction. Under the same load intensity, the length of the load has an insignificant impact on the slope stability. This 5 meter safety distance can serve a preliminary guide line for the fill embankment operation, temporary stocking construction materials and new structures near the slope.