Analysis of Influence of Internal Erosion on Deformation of Subway Station Structure

Authors

QIN Tianxin, College of Civil Engineering, Tongji University, Shanghai 200092, ChinaFollow
WANG Chen, College of Civil Engineering, Tongji University, Shanghai 200092, China; Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, ChinaFollow
TAN Xuyan, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
WEI Shengming, College of Civil Engineering, Tongji University, Shanghai 200092, China; Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China
LIANG Fayun, College of Civil Engineering, Tongji University, Shanghai 200092, China; Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China

Corresponding Author

王琛, 男, 博士, 副教授. E-mail: cwang33@tongji.edu

Abstract

Under the long-term effects of disasters such as rainstorms and floods,the soil layer around subway stations may be affected by internal erosion,threatening the structural safety of urban subway stations.To explore the influence of internal erosion on subway station structures,this study conducted isotropic consolidation and triaxial compression tests on gap-graded sand soil.Eroded soil specimens were simulated by adjusting the fine particle content to explore the pattern of variations in physical and mechanical properties caused by internal erosion.Results indicate that internal erosion alters the stress-strain relationship of gap-graded sand soil,increasing compressibility,decreasing shear strength,and weakening dilatancy.Drucker-Prager (DP) cap model parameters for eroded sand soil were determined based on the test results.Numerical investigations have been carried out,and the deformation and internal force response of subway stations and site soil layers under four distribution ranges of internal erosion were analyzed.Results reveal that the internal erosion disasters at the top and sides of subway stations have minimal effects,while bottom-side erosion causes significant settlement and internal force changes in station structures,which deserves enough attention.

Publication Date

12-24-2025

DOI

10.14048/j.issn.1671-2579.2025.06.025

First Page

218

Last Page

226

Submission Date

December 2025

Recommended Citation

Tianxin, QIN; Chen, WANG; Xuyan, TAN; Shengming, WEI; and Fayun, LIANG (2025) "Analysis of Influence of Internal Erosion on Deformation of Subway Station Structure," Journal of China & Foreign Highway: Vol. 45: Iss. 6, Article 25.
DOI: 10.14048/j.issn.1671-2579.2025.06.025
Available at: https://zwgl1980.csust.edu.cn/journal/vol45/iss6/25

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