科技创新与应用2025，Vol.15Issue(8)：104-108,5.DOI:10.19981/j.CN23-1581/G3.2025.08.023
基坑开挖诱发粉质黏土蠕变沉降的变形分析
孙厚振 1张旭 2刘秀杰1
作者信息
- 1. 济南能源工程集团有限公司,济南 250000
- 2. 山东省交通科学研究院,济南 250000
- 折叠
摘要
Abstract
In this paper,the influence of silty clay creep on the deformation of foundation pit during excavation is studied by taking the end well foundation pit of Y station of a project in Jinan City as the object.With the help of three-parameter viscoelastic foundation model,FLAC3D finite element model is established to predict the deformation caused by soil creep,and the correlation analysis with the actual monitoring data is carried out.The main research results are as follows:Soft soil creep induces surface settlement that does not depend on the additional lateral displacement of the wall,which not only leads to serious surface settlement during foundation pit excavation,but also causes serious lateral deformation of the diaphragm wall by creep extrusion of the soil outside the pit and bears large axial force.The surface settlement induced by soft soil creep increases with the increase of wall lateral displacement,which is shown as groove settlement mode.The deep horizontal displacement deformation trend of the diaphragm wall is"combined"mode;the variation law of support axial force is related to soil excavation and support.The surface settlement and diaphragm wall lateral displacement of deep foundation pit in soft soil are mainly affected by the creep of soft soil and construction time,and the relationship with vehicle load is not obvious.关键词
粉质黏土/土体蠕变/地表沉降/有限元模型/黏弹性地基模型Key words
silty clay/soil creep/surface subsidence/finite element model/viscoelastic foundation model分类
建筑与水利引用本文复制引用
孙厚振,张旭,刘秀杰..基坑开挖诱发粉质黏土蠕变沉降的变形分析[J].科技创新与应用,2025,15(8):104-108,5.
