滑坡治理中h型抗滑桩的数值分析

文中为了研究h型抗滑桩的加固效果以及不同设计参数的影响,利用ABAQUS有限元软件,建立贵州某滑坡治理前后两种工况下的模型,利用强度折减法对两种工况下的稳定性安全系数进行计算,进而判断h型抗滑桩的加固效果。同时对h型抗滑桩几个设计参数(主桩长、桩距)进行数值分析,结果表明在一定范围之内,h型抗滑桩的桩排距越大、后排桩桩长越大,h型抗滑桩的抗滑能力越强。为使前后两排桩都能起到较好的作用,同时考虑到经济因素,本次设计选取3.5m为最适桩排距,33m为最适后排桩桩长。该研究对于h型抗滑桩的应用与推广具有重要意义。

NUMERICAL ANALYSIS OF LANDSLIDE IN H ANTI-SLIDE PILE

This article to study the reinforcement effect of h anti-slide pile as well as the influence of different design parameters, combining the landslide treatment engineering living in Guizhou province, the slope model and the pile-soil interaction model were established by ABAQUS. The safe factors which settled by using 3D strength reduction FEM, can be put as the evaluation criteria for the soil slope stability. At the same time, the three-dimensional(3D) finite element models in different design cases of anti-slide piles are also established, the burdening and deformational characters of h-style pile are simulated with ABAQUS software and analyzed in detail on its main influence factors. Through numerical analysis ,We can find that the anti-sliding ability is greater if the pile spacing of h-type pile and the length of rear pile is bigger. In order to make the front and back piles play a better role, as well as the consideration of cost, the optimum pile spacing is 3.5m, and the length of rear pile is 33m. The research is of great significance for the application and promotion of h anti-slide pile.