Qiu Z W,Yu Y,Du Y,Zhou Z H. 2021. Numerical analysis of effect of reverse fault dislocation on tunnel engineering. Acta Seismologica Sinica43(2):237−244. DOI: 10.11939/jass.20200049
Citation: Qiu Z W,Yu Y,Du Y,Zhou Z H. 2021. Numerical analysis of effect of reverse fault dislocation on tunnel engineering. Acta Seismologica Sinica43(2):237−244. DOI: 10.11939/jass.20200049

Numerical analysis of effect of reverse fault dislocation on tunnel engineering

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  • Received Date: April 02, 2020
  • Revised Date: May 26, 2020
  • Available Online: June 17, 2021
  • Published Date: March 14, 2021
  • The permanent deformation of surrounding rock caused by fault dislocation will do harm to tunnel structure. In order to study the deformation and stress characteristics of tunnel under reverse fault dislocation, this paper takes Yuelongmen tunnel project of Chengdu-Lanzhou railway crossing Beichuan-Yingxiu fault as the research object. Using Abaqus software, the numerical model of tunnel structure crossing reverse fault is established, parameters are selected and boundary conditions are set. The stress and deformation of tunnel lining structure under reverse fault displacement are simulated and analyzed. The results show that the S-shaped bending deformation of the tunnel lining structure is caused by the reverse fault dislocation, and the longitudinal stress of the lining structure increases with the increase of fault dislocation, which shows that the tensile and compressive stress distribution at the top and bottom of the lining is opposite. The tensile and compressive stresses at the top of the lining are greater than those at the bottom, and the compressive stresses at the top and bottom of the lining are greater than the tensile stresses.
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