基于Plaxis的相邻基坑开挖相互影响数值分析

Numerical analysis of adjacent foundation pit excavation based on plaxis

以上海外滩公共绿地及地下空间项目为背景,采用HS small土体本构模型,运用有限元软件Plaxis,建立相邻基坑开挖模型,模拟分析了不同施工顺序对基坑水平变形的影响。结果表明:基坑最大水平位移受施工顺序的影响较小;在开挖较浅时受到先施工基坑的影响比开挖较深时受的影响要大。

This paper relies on the foundation pit of the project of public green space and underground space in the hund in Shanghai, and uses Plaxis analytical system of finite fractile with Hardening soil small - strain model, and builts adjacent foundation pit model . The horizontal deformation of the foundation pit caused by the different construction sequence was studied . And the results showed that the effect of maximum horizontal displacement of foundation caused by the construction sequence is small. The effect caused by the first construction of foundation while excavation is shallow is bigger.