World Construction

Discussion on the Large Deformation Law of Muzhailing Tunnel in Lanhai Expressway

Xi Cheng

Abstract


Muzhailing tunnel is a key project of Weiwu section Lanhai Expressway. It is located in the northeastern margin of the Tibetan Plateau. The complex geological enviorments, such as high ground stress, large buried-depth, fault and fold development, soft and fragmented rock, leads to poor self-stabilizing ability. 2# inclined shaft of Muzhailing tunnel is the main object we studied in this paper. During the construction of the tunnel, large deformation, spalling and fall-block occured on the initial support. The accumulated dome sinking vale and peripheral convergence value are large, mainly presented by the vault sinking, wall squeezing, shotcrete spalling, fall-block, and steel arch twisting and so on. In this paper, the law of large deformation of the tunnel is discussed.

Keywords


large deformation; monitoring measurement; Muzhailing tunnel; deformation law

Full Text:

PDF

References


LIU Gao, ZHANG Fan-yu, LI Xin-zhao, YANG Zhong-cun. Research on Large Deformation and Its Mechanism of Muzhailing Tunnel[J]. Chinese Journal of Rock Mechanics and Engineering. 2005.11,24(2):5521-5525.

WU Jian-guang. Cause and Countermeasure Analysis of Large Deformation of Soft Rock Section in Muzhailing Tunnel[J]. Western Prospecting Project. 2011.2:199-202. [3]

ZHANG Wenxin, SUN Shaofeng, LIU Hong. Construction Techniques of Muzhailing Tunnel with High Ground Stresses and Large Soft Rock Deformations[J]. Modern Tunnelling Technology. 2011.04,48(2):78-82.

LIU Zhi-chun, ZHU Yong-quan, LI Wen-jiang, LIU Pan-xing. Mechanism and Classification Criterion for Large Deformation of Squeezing Ground Tunnels[J]. Chinese Journal of Geotechnical Engineering. 2008.05,30(5):690-697.

LI Guoliang,LIU Zhichun,ZHU Yongquan. On the Large Squeezing Deformation Law and Classification Criteria for the Lan-zhou-Chongqing Railway Tunnels in Soft and High Geostress Rocks[J]. Modern Tunnelling Technology. 2015.02,52(1):62-68.




DOI: http://dx.doi.org/10.18686/wc.v6i2.96

Refbacks

  • There are currently no refbacks.


Copyright (c) 2017 Xi Cheng

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.