基于数值模拟的加筋土挡墙设筋参数优化效果分析

Analysis of the Optimization Effect of Reinforcement Parameters for Reinforced Soil Retaining Walls Based on Numerical Simulation

文章基于FLAC3D建立加筋土挡墙数值模型,从筋材铺设长度与铺设间距两个设计参数着手,研究了加筋土挡墙优化设计的效果。研究表明:两种优化方式下,挡土墙内产生的最大水平位移均在设计允许范围内;进行筋材铺设间距设计时,筋材内产生的最大拉拔力会显著增大,对筋材的抗拔力要求也更高;综合考虑加筋土挡墙的水平位移、筋材内最大拉拔力、挡墙稳定性系数及筋材节约率等四个因素,对筋材铺设长度进行优化较对铺设间距优化的效果要好。

In this paper, based on FLAC3D, a numerical model of reinforced soil retaining wall was established, and the optimization design effect of reinforced soil retaining wall was studied from two design parameters: reinforcement laying length and laying spacing. Research has shown that under both optimization methods, the maximum horizontal displacement generated within the retaining wall is within the design allowable range;when designing the spacing between steel bars, the maximum drawing force generated within the steel bars will significantly increase, and the requirements for the drawing force of the steel bars will also be higher;taking into account four factors, including the horizontal displacement of reinforced soil retaining walls, the maximum drawing force inside the reinforcement material, the stability coefficient of the retaining wall, and the saving rate of reinforcement material, optimizing the laying length of reinforcement material is better than optimizing the laying spacing.