›› 2007, Vol. 28 ›› Issue (10): 2234-2239.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Analysis of efficacy of rock bolt for tunnel support stucture

GUO Xiao-hong1, 2, WANG Meng-shu2   

  1. 1. China Communications 2nd Highway Survey Design and Research Institute, Wuhan 430052, China; 2. Beijing Jiaotong University, Beijing 100000, China
  • Received:2006-09-07 Online:2007-10-10 Published:2013-10-15

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Abstract: Anchor effects, pullout strength and corresponding main influential factors are studied under different geological conditions. Based on anchor bearing arch theory, a calculation method of system anchors bearing capacity is proposed and applied to analyzing the bearing capacity of different support types under different geological environments. Cost-effectiveness ratio is also compared. Result from the analysis is that: system anchors play an important effect in the surrounding rock mass; and the cost-effectiveness ratio decreases greatly as the geological condition deteriorates. Combined with several engineerings design and construction, conclusions can be drawn that few and long grouted anchors should be used instead of frequent system anchors in soft rock mass for better stabilizing the early supports.

Key words: tunnel, anchor, bearing capacity, soft surrounding rock mass

CLC Number: 

  • TU 455.7+1
  • 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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