Research on tunnel bearing structure safety under high geostress

DOI

10.2991/iceesd-18.2018.142How to use a DOI?

Keywords

high geostress; bearing structure; lining; seepage; fracture

Abstract

The underground water level of diversion tunnel is so high, that the power station in run-time will suffer enormous external hydraulic pressure, especially the marble show time dependent failure phenomenon, and increase the risk in run- time. For this reason, the reinforced concrete lining is adopted, and combine with the primary support and the consolidation grouting to form a composite bearing structure to ensure the stability of surrounding rock. According to the mechanism of lining structure and grouting on the surrounding rock stability, the importance of the composite bearing structure for the long-term stability of tunnel was revealed. By the three- dimensional seepage field analysis to reveal the importance of the relief pressure hole for the lining structure, and the pressure of lining edge is determined. The calculation results show that, in accordance with the existing design scheme, the whole stability of the structure can be guaranteed.

Copyright

© 2018, 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  - Ning Liu
AU  - Jianlin Chen
AU  - Weijiang Chu
AU  - Pingzhi Chen
PY  - 2018/05
DA  - 2018/05
TI  - Research on tunnel bearing structure safety under high geostress
BT  - Proceedings of the 2018 7th International Conference on Energy, Environment and Sustainable Development (ICEESD 2018)
PB  - Atlantis Press
SP  - 775
EP  - 778
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceesd-18.2018.142
DO  - 10.2991/iceesd-18.2018.142
ID  - Liu2018/05
ER  -