基于小应变本构模型的深基坑受力与变形性状三维有限元分析Three Dimensional Finite Element Analysis of the Behavior of Deep Foundation Excavation Using Small Strain Constitutive Model
顾正瑞,徐中华,杨涛
GU Zhengrui,XU Zhonghua,YANG Tao
摘要(Abstract)：
借助大型岩土工程有限元软件Plaxis3D,采用能够考虑土体小应变特性的HS-small土体本构模型对软土地区某深基坑工程进行了三维有限元模拟分析。研究了围护结构的变形、坑外土体位移、立柱回弹和支撑轴力等变形与受力规律,并与实测数据进行了对比分析。结果表明,基于HS-small本构模型的三维有限元分析结果和实测数据能够很好吻合,该方法适用于深基坑工程的分析。
Three dimensional finite element method was used to modelthe excavation procedure of a deep excavation in soft soil district by using the Plaxis 3 D software package.The soils were modeled by using the HS-small model which can consider the properties of soils under small strain.Lateral displacement of the diaphragm wall,displacement of soil behind the retaining wall,vertical displacement of the central posts,and axial forces in the struts were investigated and compared with the monitored data.It is shown that three dimensional finite element analysis based on the HS-small model can give fairly reasonable predictions of excavation deformation and this method is suitable for deformation analysis of deep excavations.
关键词(KeyWords)：
深基坑;支护;小应变;有限元分析;变形
deep foundation excavation;supports;small strain;finite element analysis;deformation
基金项目(Foundation): 上海市优秀技术带头人计划资助项目(20XD1430300)
作者(Author):
顾正瑞,徐中华,杨涛
GU Zhengrui,XU Zhonghua,YANG Tao
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