基于FLAC^(3D)的加筋土挡墙施工过程仿真分析

CONSTRUCTION PROCESS SIMULATION OF A REINFORCED EARTH BASED FLAC^(3D)

利用FLAC3D对一座组合式加筋格宾路堤挡墙进行了施工过程仿真,研究了施工过程中加筋土挡墙的侧向变形、筋带拉应力和挡墙稳定性的变化。结果表明,施工过程仿真分析可以再现施工过程中挡墙内部的应力应变发展过程;随着挡墙施工的进行,挡墙的变形逐渐增大,最大变形的发生位置由地基土体逐渐向挡墙面墙转移;筋材的拉应力逐渐增大,但不同部位筋材的拉应力分布规律不同;随着挡墙高度增加,挡墙的稳定性减小。

Based on the numerical simulation soft FLAC3D,the construction process of a combined reinforced earth retaining wall for road embankment was simulated,its lateral deformation,tension stress of reinforcement and stability in different construction age were studied.The results showed that construction process simulation can reoccur the stress and strain change of wall in construction process;the lateral deformation of the wall increases with the wall heightens and the position of biggest deformation changes from the foundation to wall face;the tension stress of reinforcement increases,but its distribution law differs with change in position,and the stability of reinforced earth retaining wall decreases.