土体参数对基坑支护及邻近建筑物变形影响的研究
An Analysis of the Influence of Soil Parameters on the Deformation of Pits and Adjacent Buildings
李成 1刘红军 1张秋虎1
作者信息
- 1. 五邑大学 土木建筑学院,广东 江门 529020
- 折叠
摘要
数值模拟基坑开挖过程对支护结构及邻近建筑物变形的影响被认为是一种有效的研究手段,但数值计算中参数的选取一直是困扰工程界和学术界的关键技术问题.论文基于MIDAS GTS岩土分析软件中的修正摩尔库伦模型,以广东省江门市实际工程为案例,建立了基坑的三维数值计算模型,并考虑实际土层厚度变化,以更接近工程实际.在此基础上研究了土体参数对基坑支护及邻近建筑物变形的影响,对比验证计算结果和工程实测数据发现:基于修正摩尔库伦模型并考虑实际土层变化进行数值计算,得出的计算成果较为合理,与实际情况吻合度较高;土体参数中泊松比对基坑支护及邻近建筑物的变形影响明显,是数值计算中的敏感参数,应谨慎选取.
Abstract
Numerical simulation of the influence of excavation process on the deformation of supporting structure and adjacent buildings is considered to be an effective research method,but the selection of parameters in numerical calculation has always been a key technical problem puzzling the engineering and academic circles.Based on the modified Mohr-Coulomb model in MIDAS GTS geotechnical analysis software and taking actual projects in Jiangmen City,Guangdong Province as examples,this paper establishes a three-dimensional numerical calculation model of foundation pit,and considers the change of actual soil layer thickness,so as to be closer to the engineering practice.On this basis,the influence of soil parameters on the foundation pit support and the deformation of adjacent buildings is studied.By comparing the verified calculation results with the measured engineering data and considering the actual soil layer change,it is found that the numerical calculation results based on the modified Mohr Coulomb model are reasonable and in good agreement with the actual situation.Poisson's ratio of soil parameters has obvious influence on the deformation of foundation pit support and adjacent buildings,which is a sensitive parameter in numerical calculation and should be carefully selected.
关键词
土体参数/支护结构/邻近建筑物/修正摩尔库伦模型/数值模拟Key words
Soil parameters/Supporting structures/Adjacent buildings/Modified Mohr-Coulomb model/Numerical simulations引用本文复制引用
出版年
2025
NETL
NSTL
万方数据