冲击压实破碎旧水泥砼路面时重力挡土墙的稳定性分析

结合316国道福州段冲击压实改建工程,采用有限元分析手段和拟静力的方法,对冲击压实施工时重力挡土墙的稳定性进行研究分析.首先,建立四楞压路机的三维有限元分析模型,对冲击压实四种不同工况的土基附加应力分布规律进行了研究.基于与轮载不同距离条件时挡土墙墙身的土压力分布分析结果,以冲击压路机作用在板角处为最不利工况,分析了不同墙高和墙底摩擦系数的挡土墙的抗倾、抗滑稳定性和施工安全距离.

Dynamic stability analysis of gravity retaining walls under impact compaction

According to the application of impacting compaction technology in the rehabilitating project of 316 national road near Fuzhou city on site,the dynamic stability analysis of gravity retaining walls under impact compaction are studied by the three dimensional FEM with pseudo-static method.Firstly,the FEM model of pavement under impact compaction with quadrilateral impact roller are built,the distribution of impacting additional stress of four different locations of impact load in the soil caused by compaction is analyzed.Second,based on the analysis result of different distance of load to gravity retaining wall body,the dynamic stability analysis of gravity retaining walls which with different friction coefficient at the bottom of the wall under compaction load are studied.The safe distance of impact compaction to gravity retaining walls is suggested.