J4 ›› 2010, Vol. 40 ›› Issue (1): 153-158.

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Fractal Feature of Overbreak-Underbreak Figure of Tunnel Section

XIAO Yun-hua1,2, CHEN Jian-ping1, ZHANG Peng3, ZHANG Li1   

  1. 1.College of Construction Engineering, Jilin University, Changchun 130026, China;2.Three Gorges Geotechnical Consultants Co., Ltd., Wuhan 430074|China;3.Survey &|Design Institute, Hunan Provincial Communications Planning, Changsha 410011, China
  • Received:2009-06-22 Online:2010-01-26 Published:2010-01-26

Abstract:

Overbreak-underbreak of tunnel is a common phenomenon. To the very irregular overbreak-underbreak of tunnel, fractal geometry is a new idea. On the basis of the measured data, applying fractal geometry, it  indicates that the overbreakunderbreak curve of tunnel has a self-similarity. According to analyzing the relation between rock mass classification and fractal dimension of overbreak-underbrak curve of tunnel, for a certain diameter tunnel, the fractal dimension reflects better the relation between structure of rock mass and tunnel axes. This is a basis of the prediction of the overbreak-underbreak state of the tunnel.

Key words: highway, tunnels, overbreakunderbreak, fractal geometry, joint, tunnel axes

CLC Number: 

  • TU443
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