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Geotechnical and Geological Engineering

Erschienen in:

28.03.2022 | Original Paper

Determination of Safety Factor for Rock Mass Surrounding Tunnel by Sudden Change of Equivalent Plastic Strain in Strength Reduction Method

verfasst von: Dok Yong Jong, Un Chol Han, Ui Jun Jang, Yong Nam Ri

Erschienen in: Geotechnical and Geological Engineering | Ausgabe 7/2022

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Abstract

The safety factor of rock mass surrounding tunnel can be determined using the strength reduction method (SRM), furthermore, it is very important to solve the criterion of critical state. For the stability estimation of rock mass surrounding tunnel, there is need to discuss that it is preferable to use the same criteria for the slope stability, such as non-convergence of finite element calculation, penetration of plastic strain and sudden change of horizontal displacement. The safety factor can be determined by sudden change of equivalent plastic strain in relationship between a reduction coefficient of strength parameter and equivalent plastic strain. This method is based on the elasto-plastic finite element method (FEM) and the SRM by ABAQUS and Mohr–Coulomb yield criterion. Simulation results using this method show how a safety factor varies with geometries, friction angles and cohesions for circle and square tunnels. Simulation results also show the safety factor varying with quality change of rock mass, pore water pressure and tunnel depth.

Vorheriger Artikel Study on Surrounding Rock Control of Gob-Side Entry Retaining in Inclined and Thick Longwall Face

Nächster Artikel Intralayer Variability and Compressibility of Hawthorn Group Soils

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Titel: Determination of Safety Factor for Rock Mass Surrounding Tunnel by Sudden Change of Equivalent Plastic Strain in Strength Reduction Method
verfasst von: Dok Yong Jong
Un Chol Han
Ui Jun Jang
Yong Nam Ri
Publikationsdatum: 28.03.2022
Verlag: Springer International Publishing
Erschienen in: Geotechnical and Geological Engineering / Ausgabe 7/2022
Print ISSN: 0960-3182
Elektronische ISSN: 1573-1529
DOI: https://doi.org/10.1007/s10706-022-02103-y

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