Verifying discontinuous deformation analysis simulations of the jointed rock mass behavior of shallow twin mountain tunnels

Trong Nhan Do, Jian Hong Wu

Research output: Contribution to journalArticlepeer-review

Abstract

This study extends discontinuous deformation analysis (DDA) to simulate the interactions of twin tunnels in a jointed rock mass. The ground subsidence and the rock stress distribution around the tunnels from the DDA simulation are compared to those from the trap-door model. Both the experimental and computational results show that the changing tunnel interactions in the jointed rock mass between the two tunnels are coincidently associated with the tunnel distance. In addition, the dip angle of the rock strata significantly affects the surface subsidence patterns and the stress distribution around the excavation zone. Therefore, the DDA method is a useful tool for describing the mechanical behavior of a jointed rock mass when a twin-tunnel is constructed in mountain terrain.

Original languageEnglish
Article number104322
JournalInternational Journal of Rock Mechanics and Mining Sciences
Volume130
DOIs
Publication statusPublished - 2020 Jun

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology

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