›› 2013, Vol. 34 ›› Issue (S1): 47-53.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Model test study of stability of large span tunnel under explosive plane wave

XU Jing-mao1, 2，GU Jin-cai2，CHEN An-min2，WANG Tao2，ZHANG Xiang-yang2   

  1. 1. Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, China; 2. The Third Research Institute of the Corps of Engineering, General Staff of PLA, Luoyang, Henan 471023, China
  • Received:2013-04-25 Online:2013-08-30 Published:2014-06-09

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Abstract: Through the anti-explosion model tests, the deformation and steady state of large span unlined tunnel and bolting and shotcrete lining supported tunnel under explosive plane wave are studied. This paper introduces the principle and method of model test. Based on the test data, the stress characteristics of surrounding rock, deformation behavior of tunnel wall, and the fracture morphology as well as bearing capacity of tunnel are analyzed. Research shows that under the design condition and overload condition, when tunnel supported by bolting and shotcrete lining, vertical stress in side wall, acceleration peak value of tunnel vault, peak and residual value of the displacement of tunnel vault, and peak value of hoop strain on tunnel wall are less than unlined tunnel. After overload test, unlined tunnel is damaged badly and loss of bearing capacity; but bolting and shotcrete lining supported tunnel is damaged slightly; the bearing capacity can be increased by 60%.

Key words: similarity theory, model test, plane wave, deformation characteristic, fracture morphology

CLC Number: 

  • U451
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