›› 2008, Vol. 29 ›› Issue (5): 1367-1371.

• Geotechnical Engineering • Previous Articles     Next Articles

Analysis of stress and deformation site-monitoring in fault zone of Wushaoling tunnel under complex geological conditions

LEI Jun1, ZHANG Jin-zhu2, LIN Chuan-nian3   

  1. 1. School of Civil Engineering & Architecture, Beijing Jiaotong University, Beijing 10044, China; 2. Wushaoling Tunnel Headquarters, Engineering Management Center of MOR, Lanzhou 730000, China; 3.School of Civil Engineering And Mechanics,LanZhou University,LanZhou,730000
  • Received:2006-12-11 Online:2008-05-10 Published:2013-07-24

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Abstract: Wushaoling tunnel is the longest single line railway tunnel in China up to now with the length of 20.50 km, and the F7 fault is the largest active fault, in which the geological conditions is highly complicated; it effects the tunnel construction badly. According to the characteristics of F7 fault and the problems met in tunnel construction, the stress and displacement of rock wall and lining structures were long term monitored after excavating in F7 fault section of Wushaoling tunnel. The trend of stress and displacement changing are analyzed based on the site monitoring results; and the mechanism of the extrusion large-deformation are explored so as to understand the regulation of stress releasing of rock wall and rock pressure. Furthermore, based on the site monitoring results, the optimized dynamic design and improved construction measure are proposed and adopted for the section at which the tunnel crosses the F7 fault. It not only avoided the large deformation occurrence, but also guaranteed tunnel drilling through the F7 fault section safely and quickly.

Key words: tunnel engineering, fault, stress monitoring, deformation monitoring, tunnel safety

CLC Number: 

  • U 459
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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