静态水位和坡脚压载对库区造地高边坡稳定性的参数影响分析

Parametric analysis of the influence of static water level and slope foot load on the stability of artificial high slopes in reservoir area

本文运用有限元边坡稳定分析软件GeoStudio,针对含有机质土层地基上的库区造地高边坡,考虑饱和与非饱和渗流理论,建立了有限元分析模型,分析了水位参数和坡脚压载参数对边坡整体稳定的影响。分析结果表明:在边坡高度一定的情况下,边坡最小稳定安全系数随着水位相对高度的升高先降低后增加,在水位与地面齐平时,边坡安全系数达到最小;坡脚压载的合理高度应小于边坡高度的30%~50%,压载有效长度与压载高度的比值约为坡度倒数的10倍。

This paper utilizes the finite element slope stability analysis software GeoStudio for high slopes constructed in reservoir areas with a foundation containing organic soil layers.Considering theories of both saturated and unsaturated seepage,a finite element analysis model is established.The impact of water level parameters and foot load parameters on the overall slope stability is analyzed.The analysis reveals that with a constant slope height,the minimum stability safety factor of the slope initially decreases and then increases as the relative height of the water level rises.The safety factor reaches its lowest when the water level is level with the ground surface.The rational height of the foot load should be less than 30%to 50%of the slope’s height,and the effective length of the load should be approximately ten times the inverse of the slope gradient in relation to the load height.