Numerical simulation to determine the critical safe thickness of water-resisting rock wall based on FLAC3D

DOI

10.2991/gcmce-17.2017.30How to use a DOI?

Keywords

karst tunnel; water inrush; critical safe thickness; numerical simulation; regressive formula

Abstract

Caverns with high pressurized water ahead of tunnel face tend to cause water inrush. So, the determination of the critical safe thickness of the water-resisting rock wall to prevent water inrush geohazard is of great significance during karst tunnel construction. Firstly, to obtain the critical safety thickness of rock wall ahead of karst tunnel face, a numerical model based on FALAC3D and the method to determine the critical safe thickness are established. Then, a series of numerical tests planed by the orthogonal testing theory have been carried out. The rock mass level of rock wall, dip angle of strata, lateral pressure coefficient, cavity scale, water pressure and buried depth of tunnel on the critical safe thickness is studied. Finally, the regressive formula to determine the critical safe thickness of the water-resisting rock wall is established by means of numerical testing results. Taking for examples the Maluqing tunnel on Yiwan railway, the reliability and rationality of the proposed methods were proved, so providing reference for similar engineering projects

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Fan Chen
AU  - Jiaqi Guo
PY  - 2017/06
DA  - 2017/06
TI  - Numerical simulation to determine the critical safe thickness of water-resisting rock wall based on FLAC3D
BT  - Proceedings of the 2017 Global Conference on Mechanics and Civil Engineering (GCMCE 2017)
PB  - Atlantis Press
SP  - 153
EP  - 156
SN  - 2352-5401
UR  - https://doi.org/10.2991/gcmce-17.2017.30
DO  - 10.2991/gcmce-17.2017.30
ID  - Chen2017/06
ER  -