Submit

Login Login

Register Register

Home / Journals / SDHM / Online First / doi:10.32604/sdhm.2025.075333
Journal Menu
Special Issues
Table of Content

All issues

Online First

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

Open Access

ARTICLE

Study on Deformation and Differential Settlement of Large-Span Metro Foundation Pit with Top-Down Construction

Kai Wang1,2, Xinkai Liu3, Xiaolin Tang3,*
1 China Communications Construction Second Highway Survey, Design and Research Institute Co., Ltd., Wuhan, China
2 Tunnel and Underground Space Engineering Technology R&D Center of CCCC Group, Wuhan, China
3 Key Laboratory of Geotechnical Engineering Infrastructure Safety and Control of Jiangxi Province, East China Jiaotong University, Nanchang, China
* Corresponding Author: Xiaolin Tang. Email: email
(This article belongs to the Special Issue: Health Monitoring of Transportation Infrastructure Structure)

Structural Durability & Health Monitoring https://doi.org/10.32604/sdhm.2025.075333

Received 29 October 2025; Accepted 19 December 2025; Published online 19 August 2026

Abstract

Taking the foundation pit project of Zhongyilu Station as an example, this study established a numerical model using Plaxis 3D to analyze the impacts of the excavation of the metro station foundation pit on the horizontal deformation of the retaining structure, surface settlement, and differential settlement. Additionally, it analyzed the control of differential settlement through construction measures, including adjusting the diameter of lattice columns, soil reinforcement, and installing internal bracings. The research results show that with the excavation of the foundation pit, the horizontal displacement of the diaphragm wall and surface settlement gradually increase, while the differential settlement first increases and then stabilizes gradually. To control differential settlement, priority should be given to adjusting the diameter of the upper columns of lattice columns rather than the lower columns, and it is recommended that the diameter of the upper columns be set at 1.0–1.1 m. Soil reinforcement and installation of internal bracings can effectively control the deformation of the foundation pit and the surrounding environment, with a recommended reinforcement thickness of 6 m. When it is necessary to control the deformation and differential settlement of the foundation pit, the above three methods should be used in combination.

Keywords

Foundation pit engineering; cut-and-cover method; numerical simulation; deformation controls

  • 96

    View

  • 25

    Download

  • 0

    Like

Related articles
Copyright© 2026 Tech Science Press
© 1997-2026 TSP (Henderson, USA) unless otherwise stated

Share Link