降雨影响下的边坡稳定性及加固研究

Study on slope stability and reinforcement under the influence of rainfall

边坡稳定性受到局部地区降雨的影响较大,降雨入渗和地震作用是影响边坡稳定性的最主要因素。本文利用有限元软件计算了不同工况下(原始边坡,放坡开挖,抗滑桩支护,持续降雨)边坡稳定性的差异。结果表明,抗滑桩的加入有效阻止了土体下滑,但随降雨的持续,土体含水量的变化时影响边坡稳定的主要因素,结果就是即使安插了抗滑桩的边坡,其滑体位移及剪应力也会很大,而土体含水量控制在18.16%时,对边坡稳定性最为有益。

The slope stability is greatly affected by rainfall in local areas.Rainfall infiltration and earthquake action are the main factors affecting the slope stability.In this paper,finite element software is used to calculate the difference of slope stability under different working conditions(original slope,slope excavation,anti-slide pile support,continuous rainfall).Results show that the addition of anti-slide pile effectively prevent the decline in soil,but along with the continuous rain,soil water content changes of the main factors influencing the slope stability,the result is that even if placed the slope anti-slide pile,the moved its slip and shear stress will be very big,and the soil moisture content control in 18.16%,the most beneficial for slope stability.