基于有限差分法的临近地铁软土深基坑变形分析
DEFORMATION ANALYSIS OF SOFT SOIL DEEP FOUNDATION PIT NEAR SUBWAY BASED ON FINITE DIFFERENCE METHOD
何少琼 1张兵 1郭薇1
作者信息
- 1. 昆明理工大学国土资源工程学院,昆明 650093
- 折叠
摘要
在临近地铁隧道的深基坑工程施工过程中,难免会引起隧道的变形,如不加以控制将会威胁到隧道的安全.在受到地铁带来的动荷载条件下,应将该类基坑与传统深基坑分析方法进行区分.本文以昆明市巫家坝片区某深基坑工程为例,分析临近地铁隧道的深基坑进行开挖对基坑本身和地铁隧道及周边建筑物的影响.首先对研究区地层参数等进行统计,采用 FLAC3D有限差分软件建立了三维数值模型,分析基坑开挖引起的变形,提出了设置隔离桩及施作地下连续墙作为支护结构的优化方案.
Abstract
During the construction of the deep foundation pit near the subway tunnel,it is inevitable that the tunnel will be deformed,and if not controlled,it will threaten the safety of the tunnel.Under the dynamic load conditions brought by the subway,the analysis methods between this type of foundation pit and the traditional deep foundation pit should be distinguished.Taking a deep foundation pit project in Wujiaba area of Kunming City as an example,this paper analyzes the impact of the excavation of the near deep foundation pit next to the subway tunnel on the foundation pit itself,the subway tunnel and surrounding buildings.Firstly,the stratigraphic parameters in the study area are statistical,a three-dimensional numerical model is established by FLAC3D finite difference software,the deformation caused by excavation of the foundation pit is analyzed,and an optimization scheme for setting isolation piles and applying underground continuous walls as supporting structures is proposed.
关键词
深基坑/地铁隧道/三维数值分析/变形Key words
deep foundation pit/subway tunnel/3D numerical analysis/deformation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据