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.
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Funding
This study was financially supported by the National Science Foundation for Distinguished Young Scholars of China (No.52025091), the National Natural Science Foundation of China (U1934218, No.51809158, NO.51909143, NO.52009076), Shandong Provincial Key Research and Development Program (Major Scientific and Technological Innovation Project, (NO.2019JZZY010601, NO.2019JZZY010428), Science and Technology Program of the Ministry of Housing and Urban–Rural Development (No.2020-K-142), and Shandong Province Housing and Urban–Rural Construction Science and Technology Plan Project (No.2019-S7-1).
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Conceptualization: LL; Methodology and Writing—original draft preparation: YH; Writing—review and editing: JW, QJ; Formal analysis and investigation: YX; Methodology: XB; Funding acquisition: JC; Resources: LL; Investigation: ZF; Data curation: KW.
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Li, L., Han, Y., Wang, J. et al. Study on Critical Safety Distance Between the Shield Tunnel and Front Fault Fracture Zone in Urban Metro. Geotech Geol Eng 40, 5667–5683 (2022). https://doi.org/10.1007/s10706-022-02239-x
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DOI: https://doi.org/10.1007/s10706-022-02239-x