中外公路2025，Vol.45Issue(4)：8-16,9.DOI:10.14048/j.issn.1671-2579.2025.04.002
与既有地铁车站共墙深基坑开挖的变形特征研究
Study on Deformation Characteristics Induced by Deep Foundation Pit Excavation Sharing Diaphragm Wall with Existing Subway Station
摘要
Abstract
To investigate the deformation induced by deep foundation pit excavation sharing a diaphragm wall with an existing subway station,this study took the foundation pit project of Gongming Square Station of Shenzhen Metro as an example.A three-dimensional numerical model was established by FLAC3D software to analyze the deformation characteristics of the surrounding ground surface,retaining structures,and the subway station during the excavation process.In addition,field monitoring was conducted to measure the vertical and horizontal displacements of the pit sidewall and the subway station sharing the diaphragm wall.The results show that after excavation,the ground surface settlement behind the retaining wall exhibits an approximately elliptical distribution,with the affected range being about one time the excavation depth.The retaining wall shows lateral deformation toward the pit,forming an"inward convex"shape.The excavation mainly causes uplift displacement in the subway station sharing the diaphragm wall,while lateral displacement remains small.The maximum uplift displacement(2.85 mm)occurs at the center of the sidewall adjacent to the pit,and the maximum lateral displacement(1.44 mm)occurs at the base slab near the station center.The field monitoring data of the pit sidewall and subway station sharing the diaphragm wall agree well with the numerical simulation results,verifying the reliability of the numerical model.关键词
深基坑/共用地连墙/变形特性/地铁车站/硬化土模型/数值模拟/现场监测Key words
deep foundation pit/common diaphragm wall/deformation characteristic/subway station/hardening soil model/numerical simulation/field monitoring分类
交通工程引用本文复制引用
凌同华,邹南伟,周坤,冯威,伍星,张亮..与既有地铁车站共墙深基坑开挖的变形特征研究[J].中外公路,2025,45(4):8-16,9.基金项目
国家自然科学基金资助项目(编号:52078061) （编号:52078061）
湖南省教育厅科学研究优秀青年项目(编号:21B0725) （编号:21B0725）
