Study on Deformation Characteristics Induced by Deep Foundation Pit Excavation Sharing Diaphragm Wall with Existing Subway Station

Authors

LING Tonghua, School of Civil and Environmental Engineering , Changsha University of Science & Technology , Changsha , Hunan 410114 , ChinaFollow
ZOU Nanwei, School of Civil and Environmental Engineering , Changsha University of Science & Technology , Changsha , Hunan 410114 , ChinaFollow
ZHOU Kun, China Construction Fifth Division South China Company , Shenzhen , Guangdong 518000 , China
FENG Wei, China Construction Fifth Division South China Company , Shenzhen , Guangdong 518000 , China
WU Xing, School of Civil and Environmental Engineering , Changsha University of Science & Technology , Changsha , Hunan 410114 , China
ZHANG Liang, College of Civil Engineering , Hunan City University , Yiyang , Hunan 413000 , China

Corresponding Author

邹南伟，男，硕士研究生.E-mail：541755735@qq.com

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.

Publication Date

8-15-2025

DOI

10.14048/j.issn.1671-2579.2025.04.002

First Page

8

Last Page

16

Submission Date

August 2025

Recommended Citation

Tonghua, LING; Nanwei, ZOU; Kun, ZHOU; Wei, FENG; Xing, WU; and Liang, ZHANG (2025) "Study on Deformation Characteristics Induced by Deep Foundation Pit Excavation Sharing Diaphragm Wall with Existing Subway Station," Journal of China & Foreign Highway: Vol. 45: Iss. 4, Article 2.
DOI: 10.14048/j.issn.1671-2579.2025.04.002
Available at: https://zwgl1980.csust.edu.cn/journal/vol45/iss4/2

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