Numerical Simulation of Separated Tunnel Under Vertical Dislocation of Fault

DOI

10.2991/978-94-6463-449-5_35How to use a DOI?

Keywords

Separated tunnel; fault; shear stress mutation; rock mass displacement

Abstract

Taking the fault surface of Tao River separated tunnel as the research background, the mechanical response of separated tunnel and the displacement law of deep rock mass under the action of vertical dislocation of fault are explored. The three-dimensional model of tunnel is established by using finite difference software FLAC, and the simulation analysis of separated tunnel crossing fault is completed. The sudden drop of shear stress and the settlement law of deep rock mass are obtained. FLAC analysis shows that: (1) When the distance between the tunnel faces is less than 20m, the right line tunnel crossing the fault plane induces the second sudden drop of the left line tunnel, which increases the possibility of instability slip, and the distance between the tunnel faces is inversely proportional to the sudden drop of shear stress; (2) The closer the distance between the working faces, the greater the peak value of the ratio of shear stress to positive pressure, and the more prone to activation instability at the fault; (3) The distance between the tunnel face is inversely proportional to the secondary settlement. Considering the construction period and economic effect, it is recommended that the distance between the tunnel face is 25m.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Huizhong Lu
AU  - Yanxi Zhang
AU  - Zheng Liu
AU  - Yinghua Dang
AU  - Zhengfei Zhao
AU  - Xubo Zhang
PY  - 2024
DA  - 2024/06/30
TI  - Numerical Simulation of Separated Tunnel Under Vertical Dislocation of Fault
BT  - Proceedings of the 2024 8th International Conference on Civil Architecture and Structural Engineering (ICCASE 2024)
PB  - Atlantis Press
SP  - 356
EP  - 364
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-449-5_35
DO  - 10.2991/978-94-6463-449-5_35
ID  - Lu2024
ER  -