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Geotechnical and Geological Engineering

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21.07.2022 | Original Paper

Study on Critical Safety Distance Between the Shield Tunnel and Front Fault Fracture Zone in Urban Metro

verfasst von: Liping Li, Yizhe Han, Jing Wang, Qing Jin, Yifan Xiong, Jixin Chong, Xingzhi Ba, Zhongdong Fang, Kai Wang

Erschienen in: Geotechnical and Geological Engineering | Ausgabe 11/2022

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Abstract

This article examines the tunneling process for constructing subway shields in cities aiming at preventing the risk of water and mud inrush in fault fracture zones and with abundant groundwater. Here, we studied the influence law and the response sensitivity of shield cutter heads with different types and diameters on the critical safety distance. Likewise, we reveal the influence law and response sensitivity of the front fault fracture zone with different thicknesses and water pressure on the critical safety distance. This study simulates the propulsion process of shield tunnels and the moment of water inrush using COMSOL Multiphysics fluid–structure coupling method. Using a numerical simulation of a three-dimensional finite element model, we obtained a formula for a critical safe distance for the fault fracture zone in front of the shield tunnel. This research has particular relevance to the construction of metro shield excavations in cities with fault fracture zones and abundant underground water.

Vorheriger Artikel Statistical and Parametric Studies on Natural Levees as Weak Points Against Leakages in River Levees

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Titel: Study on Critical Safety Distance Between the Shield Tunnel and Front Fault Fracture Zone in Urban Metro
verfasst von: Liping Li
Yizhe Han
Jing Wang
Qing Jin
Yifan Xiong
Jixin Chong
Xingzhi Ba
Zhongdong Fang
Kai Wang
Publikationsdatum: 21.07.2022
Verlag: Springer International Publishing
Erschienen in: Geotechnical and Geological Engineering / Ausgabe 11/2022
Print ISSN: 0960-3182
Elektronische ISSN: 1573-1529
DOI: https://doi.org/10.1007/s10706-022-02239-x

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