›› 2008, Vol. 29 ›› Issue (2): 483-490.

• Geotechnical Engineering • Previous Articles     Next Articles

Effect of supporting time on stability of small spacing roadway tunnel

YANG Jian-ping1, CHEN Wei-zhong1, GUO Xiao-hong2   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. China Communications Second Highway Survey Design and Research Institute, Wuhan 430052, China
  • Received:2007-02-09 Online:2008-02-11 Published:2013-07-10

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Abstract: As large scale construction of highways in West China, more small spacing tunnels have been adopted due to the limitation of landscape. Because of the complexity of construction techniques，deformation and failure mechanisms of surrounding rock mass during excavation are complicated. Construction sequences and supporting time are important to the stability of rock mass and concrete lining. Effects of release proportion of the load and supporting time on stability of tunnel are studied based on construction characteristics of Qishucao Small Spacing Tunnel which belongs to Shanghai-Chengdu high-way. Numerical simulation results show that, as the lining constructed earlier, linings and anchors bear bigger load and the plastic deformation becomes smaller. Constructing the reinforced concrete lining in time can prominently control the deformation of the rock pillars and improve the stress condition of the surrounding rock mass. Achievements from the study can guide the design and construction of small spacing tunnel with similar conditions.

Key words: small spacing tunnel, supporting time, release proportion of the load, reinforced concrete lining

CLC Number: 

  • TU 443
  • 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.
[1] ZHU Zheng-guo , SUN Ming-lu , ZHU Yong-quan , SUN Xing-liang . Field monitoring on blasting vibration and dynamic response of ultra-small spacing tunnels [J]. , 2012, 33(12): 3747-3752.
[2] GONG Jian-wu，LEI Xue-wen. Numerical analysis of stability of surrounding rock for large-section tunnels with small spacing [J]. , 2010, 31(S2): 412-417.
[3] SU Kai, WU He-gao. Nonlinear finite element analysis of reinforced concrete lining of hydraulic tunnels [J]. , 2005, 26(9): 1485-1490.
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