Ground Stress Characteristics and Their Influence on Tunnel Deformation:  Case Study on Muzhailing Tunnel

doi:10.3973/j.issn.1672-741X.2013.02.005

Tunnel Construction ›› 2013, Vol. 33 ›› Issue (2): 116-121.DOI: 10.3973/j.issn.1672-741X.2013.02.005

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Ground Stress Characteristics and Their Influence on Tunnel Deformation:  Case Study on Muzhailing Tunnel

ZHANG Wenxin¹, ZHANG Jianguo², TANG Shaowu³, LIU Zhiqiang⁴,  JIANG Yongqiang¹, GAO Pan1, LI Yanzong^1

(1. Technology Center of China Railway Tunnel Group, Luoyang 471009, Henan, China;  2. China Railway Tunnel Survey & Design Institute Co., Ltd., Tianjin 300133, China;  3. The 2nd Engineering Co., Ltd. of China Railway Tunnel Group, Sanhe 065201, Hebei, China;  4. China Railway Southwest Research Institute Co., Ltd., Chengdu 610031, Sichuan, China)

Received:2012-09-27 Revised:2012-11-20 Online:2013-02-20 Published:2013-03-05

Abstract

Abstract:

The ground stress values measured in the limited insitu ground stress tests are expanded by means of FE multiple element regression analysis and neural network.The characteristics of the ground stress field are analyzed. The conditions of carbonaceous slate of Muzhailing tunnel is analyzed by means of FLCD numerical calculation. Conclusions drawn are as follows: 1) The horizontal influencing range of the high ground stress on the deformation of tunnel constructed by 3bench excavation method is about 2 to 3 times of the tunnel diameter. 2) The middle bench, is the main stressreleasing phase and also the main deformationinducing phase. 

Key words: Muzhailing tunnel, high ground stress, numerical simulation, deformation

ZHANG Wenxin, ZHANG Jianguo, TANG Shaowu, LIU Zhiqiang, JIANG Yongqiang, GAO Pan, LI Yanzong. Ground Stress Characteristics and Their Influence on Tunnel Deformation:  Case Study on Muzhailing Tunnel[J]. Tunnel Construction, 2013, 33(2): 116-121.

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Ground Stress Characteristics and Their Influence on Tunnel Deformation:  Case Study on Muzhailing Tunnel

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