›› 2005, Vol. 26 ›› Issue (8): 1278-1282.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Research on relation among surrounding rock classification, tunnel radii and overbreak-underbreak of tunnels

SUN Shao-rui1, WU Ji-min2, WEI Ji-hong2   

  1. 1.Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China； 2.College of Civil Engineering, Hohai University, Nanjing 210098, China
  • Received:2004-03-08 Online:2005-08-10 Published:2013-12-26

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Abstract: The geological characteristics of rock mass are main factors of affecting overbreak-underbreak of tunnels. It is important to analyze and forecast overbreak-underbreak of tunnels for evaluating rock mass quality correctly and classifying the rock mass and researching the relation between rock mass quality and overbreak-underbreak. The relations among the classification of RMR and Q and overbreak-underbreak are researched. The relations among different tunnel radii and overbreak-underbreak in the same class rock mass are studied. According to these, the relation between the classification RMR and Q is built. The linear relation and the logarithm linear relation among RMR and Q and overbreak-underbreak are gained. It is fit to fact that the relation between the classification of RMR and Q is built according to overbreak-underbreak of tunnels. Lastly, the multi-correlation among overbreak-overbreak, surrounding rock classification and radius of tunnel are researched.

Key words: tunnel, surrounding rock classification, overbreak-underbreak, rock mass rating, multi-correlation coefficient

CLC Number: 

  • TU 45
  • 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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