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Relationship Among Overbreak-Underbreak of Tunnel, Joints and Tunnel Axes

XIAO Yun-hua, WANG Qing, CHEN Jian-ping,QIU Dao-hong   

  1. College of Construction Engineering, Jilin University,Changchun 130026,China
  • Received:2007-08-27 Revised:1900-01-01 Online:2008-05-26 Published:2008-05-26
  • Contact: XIAO Yun-hua

Abstract: Applying the fractal geometry, it have been indicated that the overbreak-underbreak curve of tunnel has a self-similarity, and the fractal dimension of the overbreak-underbreak of tunnel is the function of structure of rock mass and the tunnel axes. On the basis of it, to a set of steep joints, it has the double logarithm linear relation between overbreak-underbreak and joints spacing, and it has the double logarithm linear relation between overbreak-underbreak and angle between joints and tunnel axes, too. Finally, the multi-relation among them is built up.

Key words: highway tunnel, overbreak-underbreak, fractal dimension, rock mass joints, tunnel axes

CLC Number: 

  • TU457
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