›› 2009, Vol. 30 ›› Issue (12): 3765-3770.

• Geotechnical Engineering • Previous Articles     Next Articles

Monitoring and analysis of tunnel surface stability

JIA Jian-qing1, WANG Hong-tu2, LIU Da-peng1, AN Long-qi1   

  1. 1. School of Traffic and Transportation, Lanzhou Jiaotong University, Lanzhou 730070, China; 2.Key Laboratory for the Exploitation of Southwestern Resources & the Environmental Disaster Control Engineering, Ministry of Education, Chongqing University, Chongqing 400044, China
  • Received:2008-05-22 Online:2009-12-10 Published:2010-01-18

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Abstract:

The buried depth of Liziba tunnel is shallow, and surrounding rocks at entrance and exit are soft. Many houses and one water tower have been constructed over the tunnel. According to the engineering condition, the ahead ductile, I-steel and shotcrete are used in the first support, grounting and inverted arch are constructed at tunnel bottom, and the semicircular arch of reinforced concrete is used in the second lining. To ensure the construction safety and the building stability during construction, the stability of the most dangerous section is calculated, and the calculated stability factor is 1.9. The settlements of the surface, the water tower and the houses are monitored, and the arch settlement and horizontal convergence of the side-wall are monitored, too. The results show that settlements of the surface and the houses are little, the settlement of water tower goes down equably, and the deformations of arch and side-wall are little, too.

Key words: tunnel, stability, monitoring, settlement

CLC Number: 

  • U 45
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