h型抗滑桩加固边坡的优化分析

Optimization Analysis of h-type Anti-sliding Pile Reinforcing Slope

采用HyperMesh程序建立h型抗滑桩加固边坡的三维有限元数值模型,即综合考虑h型抗滑桩桩-土、梁-土及桩-梁的共同作用,并基于有限元强度折减法,通过ABAQUS有限元软件对三维模型进行数值模拟,同时引入参数q来判别h型抗滑桩的加固效果。根据此参数,并考虑安全系数、桩身最大滑坡水平推力,对h型抗滑桩夹角θ、桩间距、桩排距等设计参数进行优化分析。结果表明,达到较好加固效果时的最优夹角为15°,最优桩间距为5倍桩宽,最优桩排距为5倍桩宽。

Three-dimensional finite element numerical model of the h-type anti-sliding pile reinforcing slope was established by program HyperMesh.Based on the finite element shear strength reduction method,three-dimensional model was numerically simulated by the finite element software ABAQUS with considering pile-soil,beam-soil and pile-beam interaction of h-type anti-sliding pile.The parameter q was used to distinguish the reinforcement effect of h-type anti-sliding pile.According to the parameter q and considering safety coefficient,the maximum landslide horizontal thrusts on pile body,the design parameters of h-type anti-sliding pile were optimized,such as included angleθ,pile spacing,pile row distance.The results show that when achieves good reinforcement effect,the optimal included angle is 15°,and both of the optimal pile spacing and pile row distance are 5times pile width.