MC、HS、HSS本构模型在深基坑开挖模拟中的比较分析

MC,HS,HSS CONSTITUTIVE MODELS ADOPTED IN COMPARATIVE ANALYSIS OF DEEP EXCAVATION MODELLING

文中运用有限元分析软件Plaxis进行建模,对上海软土地区深基坑开挖过程进行模拟。总结归纳了上海地区土体参数设置的方法,并比较了MC、HS、HSS三种土体本构模型的模拟结果。通过三种本构模型的横向比较,及与现场监测数据的对比发现,通过设置合理的土体刚度参数及OCR值,HSS本构模型能够较为精确地模拟出围护墙体水平位移变形。

This paper studies the staged construction of deep excavation in soft clay which is typical soil type in Shanghai by the FEM software Plaxis.Moreover,the setting of soil stiffness parameters and OCR value were summarized by comparing 3 different soil constitutive models which are MC,HS,HSS.Moreover,the monitoring data collected on site showed that the HSS soil constitutive model can precisely predict the wall deflection during excavation by adopting proper soil parameters.