STUDY ON SAFE NET DISTANCE AND ROCK STABILITY OF UNSYMMETRICAL PRESSURE LARGE SPAN NEIGHBOURHOOD TUNNEL

Wang Gengfeng; Zhang Yongxing; Xiong Xiaohui; Wang Guilin

doi:10.13204/j.gyjz201102011

Volume 41 Issue 2

Dec. 2014

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Wang Gengfeng, Zhang Yongxing, Xiong Xiaohui, Wang Guilin. STUDY ON SAFE NET DISTANCE AND ROCK STABILITY OF UNSYMMETRICAL PRESSURE LARGE SPAN NEIGHBOURHOOD TUNNEL[J]. INDUSTRIAL CONSTRUCTION, 2011, 41(2): 39-44. doi: 10.13204/j.gyjz201102011

Citation:

Wang Gengfeng, Zhang Yongxing, Xiong Xiaohui, Wang Guilin. STUDY ON SAFE NET DISTANCE AND ROCK STABILITY OF UNSYMMETRICAL PRESSURE LARGE SPAN NEIGHBOURHOOD TUNNEL[J]. INDUSTRIAL CONSTRUCTION, 2011, 41(2): 39-44. doi: 10.13204/j.gyjz201102011

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STUDY ON SAFE NET DISTANCE AND ROCK STABILITY OF UNSYMMETRICAL PRESSURE LARGE SPAN NEIGHBOURHOOD TUNNEL

doi: 10.13204/j.gyjz201102011

1.
School of Civil Engineering,Chongqing University,Chongqing 400045,China

Received Date: 2010-09-12
Publish Date: 2011-02-20

Abstract

Abstract

According to construction of Kuiqi two bores and eight lanes tunnel with super-large section and span,a 3D mathematic model was setup using ANSYS software,it was analyzed the variation of tunnel rocks displacement,equivalent plastic strain and the safety factors with different net distances and determined the safety net distance of large span neighbourhood tunnels.In the process of tunnel excavation simulation,three support parameters of middle rock pillar were used to study the force and deformation characteristics of middle rock pillar under Ⅲ,Ⅳ and Ⅴ level surrounding rocks.The results provided scientific basis for support design,excavation method and strengthening method of large span neighbourhood tunnel.
- neighbourhood tunnel,
- safe net distance,
- rock stability,
- ANSYS numerical simulation