Analyzing of Reinforcement Effect of Bolt-Grouting in Squeezing Tunnel

DOI

10.2991/emeit.2012.123How to use a DOI?

Keywords

Squeezing tunnel, Self-supporting arch, Bolt-grouting

Abstract

For the weak rock liable to squeezing deformation, it is a very meaningful matter to seek a new reinforcement method. Bolt-grouting support is a new type of active method combine bolting and grouting, its principle is to reinforce the unloading loosening rock behind primary support composed of steel and spraying concrete by grouting way using hollow bolt. Bolt-grouting colligated filling and cementing effects by grouting and combined, suspension effects by anchor, is effective to improve the mechanical properties of surrounding rocks. In this paper, based on the surrounding rock self-supporting arch principle, the bolt-grouting support effect is analyzed using the finite element method. The results show that: the stress concentration state of surrounding rock approaches equilibrium after bolt-grouting, which is useful to promote the formation of surrounding rock self-supporting arch, and improve the stress condition significantly.

Copyright

© 2012, 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  - Yuanchun SUN
AU  - Huaijian LI
AU  - Zailiang XU
AU  - Bo GAO
PY  - 2012/09
DA  - 2012/09
TI  - Analyzing of Reinforcement Effect of Bolt-Grouting in Squeezing Tunnel
BT  - Proceedings of the 2nd International Conference on Electronic & Mechanical Engineering and Information Technology (EMEIT 2012)
PB  - Atlantis Press
SP  - 586
EP  - 589
SN  - 1951-6851
UR  - https://doi.org/10.2991/emeit.2012.123
DO  - 10.2991/emeit.2012.123
ID  - SUN2012/09
ER  -