›› 2007, Vol. 28 ›› Issue (S1): 485-489.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Numerical experimentational research on concealed karst cave’s influence on circular tunnel stability

SONG Zhan-ping1, 2, QI Yan-bo2, LI ning3   

  1. 1. School of Civil Engineering, Xi’an University of Arch. and Tech., Xi’an 710055, China; 2. China Railway 13th Bureau Group Co. Ltd., Changcun 130033, China; 3. Geotechnical Engineering Center, Xi’an University of Technology, Xi’an 710055, China
  • Received:2007-05-31 Online:2007-10-25 Published:2014-03-28

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Abstract: In the construction of tunnel through karst area due to the concealed caves which in the project could not be taken to safety and often made nonplused susceptible damage to the tunnel construction and that caused a great deal of potential safety problems and greater danger. Because the stability problem caused by mid and small-scale concealed karst cave when tunnel through karst areas is most common, The influence of different scale of crown concealed kast cave and the different distance between the tunnel and the crown concealed kast cave to rock stress, displacement and the internal forces of supporting structure were studied used numerical analytial test method, and the influence of the concealed cave on the tunnel plastic changes of the rock characteristics is also studied. Based on the numerical tests, the tunnel displacement changes inherent mechanism caused by top concealed are proposed. The study shows that within a certain scope of the existing large-scale top concealed cave will lead to increased displacement of the tunnel and the tunnel of rock stress will also increase. The research results of the karst area tunnel have a scientific and quantitative promotion to the design and construction of karst tunnel.

Key words: tunnel engineering, concealed karst caverns, stability of tunnels, numerical experiment

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.
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