基于MIDAS GTS基坑支护数值模拟分析

Numerical simulation analysis of foundation pit support based on MIDAS GTS

岩土工程中数值分析是起着重要作用.本文通过MIDAS GTS有限元软件建立基坑开挖模型,模拟实际施工,得出相应的变形数据以及锚杆轴力变化,可以提前预测出基坑开挖过程中出现基坑位移和土体隆起量最大的位置.结果表明随着开挖深度逐渐加大,桩身水平位移逐渐增大,最大水平位移随着开挖深度增大而向下移;在基底处发生了隆起,基底中间位置处隆起量最大,两侧逐渐减小;地表的沉降量和水平位移随着开挖深度增加也逐渐增大;锚杆在自由段处轴力最大,沿着锚固段轴力逐渐减小,可为类似工程提供参考依据.

Numerical analysis plays an important role in geotechnical engineering.In this paper,MIDAS GTS finite element software is used to establish the foundation pit excavation model,simulate the actual construction,get the corresponding deformation data and anchor axial force changes,which can predict the position of the largest displacement and soil uplift in the process of foundation pit excavation in advance.The results show that with the increase of excavation depth,the horizontal displacement of pile increases gradually,and the maximum horizontal displacement moves downward with the increase of excavation depth;the uplift occurs at the base,and the uplift at the middle of the base is the largest,and the two sides gradually decrease;the surface settlement and horizontal displacement also increase gradually with the increase of excavation depth;the axial force of anchor rod at the free section is the largest,and it decreases along the anchorage line,It can provide reference for similar projects.