基于HSS小应变本构模型的软土地区超深地连墙施工过程变形分析

Deformation Analysis of the Construction Process of Ultra-Deep Diaphragm Wall in Soft Area Using HSS Small-Strain Model

摘要: 本文以上海地区某开挖深度超过30 m，地连墙深度超过60 m的超深基坑工程为背景，对基坑开挖全过程进行了三维有限元模拟，模拟中土体本构模型分别采用了Mohr-Coulomb模型和HS-Small小应变模型，通过分析超深地连墙变形情况，并与现场实测数据进行对比，结果表明，HS-Small小应变模型更适合软土地区超深地连墙的变形分析。

Abstract: In this paper, based on an ultra-deep foundation pit project with a depth of more than 30 m and a depth of 60 m of diaphragm wall in Shanghai, a three-dimensional finite element simulation of the whole process of the excavation of the foundation pit was carried out. In this simulation Mohr- Coulomb model and HS-Small model were used for the soil constitutive model. By analyzing the deformation of ultra-deep diaphragm wall and comparing with the field measured data, the results show that the HS-Small model is more suitable for the deformation analysis of ultra-deep diaphragm walls in soft areas.