市政技术2026，Vol.44Issue(4)：106-117,12.DOI:10.19922/j.1009-7767.2026.04.106
湿陷性黄土地层地铁基坑围护结构变形机理与稳定性控制研究
Study on Deformation Mechanism and Stability Control of Subway Foundation Pit Surrounding Structure in Collapsible Loess Stratum
胡正财1
作者信息
- 1. 中铁十八局集团第三工程有限公司,河北涿州 072750
- 折叠
摘要
Abstract
In view of the increasingly prominent problem of the stability of deep foundation pit engineering in col-lapsible loess stratum,based on the ultra-deep foundation pit of Yingze East Street Station of Taiyuan Rail Transit Line 1,the deformation mechanism and stability control measures of the surrounding structure of subway foundation pit in collapsible loess stratum are studied by the combination of field monitoring and theoretical analysis.The re-sults show that the retaining structure presents a typical"bulging"deformation characteristic during the excavation process.The maximum horizontal displacement occurs in the middle and lower part of the pile;The coupling effect of water and soil significantly aggravates the collapsibility of soil and the lateral displacement of retaining structure;Both the cooperative work and pre-stress control of the supporting system play a key role in suppressing deformation.Based on the field monitoring and theoretical analysis,control measures such as strengthening the bending resis-tance of retaining piles,optimizing the stiffness configuration of support system,setting water-proof curtain and soil improvement are put forward to ensure the safety and stability of foundation pit and surrounding environment.The research findings can provide a theoretical basis and practical reference for the design and construction of subway foundation pit engineering under similar geological conditions of collapsible loess strata.关键词
湿陷性黄土/地铁基坑/围护结构/变形机理/稳定性控制Key words
collapsible loess/subway foundation pit/enclosure structure/deformation mechanism/stability control分类
建筑与水利引用本文复制引用
胡正财..湿陷性黄土地层地铁基坑围护结构变形机理与稳定性控制研究[J].市政技术,2026,44(4):106-117,12.
