Study of Load Distribution Rules of Primary Support of  Shallowcovered Unsymmetrically Pressured Tunnel by Using  Multidisplacement Back Analysis Method

doi:10.3973/j.issn.1672-741X.2016.07.010

Tunnel Construction ›› 2016, Vol. 36 ›› Issue (7): 832-836.DOI: 10.3973/j.issn.1672-741X.2016.07.010

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Study of Load Distribution Rules of Primary Support of  Shallowcovered Unsymmetrically Pressured Tunnel by Using  Multidisplacement Back Analysis Method

LIU Yingqi¹, ZHANG Xiedong¹, CHEN Weidong², XU Shunlian², ZHANG Hang¹

(1. School of Transportation, Wuhan University of Technology, Wuhan 430063, Hubei, China;  2. Highway Administration of Wuhai, Wuhai 016000, Inner Mongolia, China)

Received:2015-12-14 Revised:2016-02-02 Online:2016-07-20 Published:2016-07-27

Abstract

Abstract:

A plan finite element model is established by means of multidisplacement back analysis method, so as to learn the rock stress distribution rules on support structure of shallowcovered unsymmetrically pressured tunnel. Meanwhile, the stress releasing rate, unsymmetrical pressure and influencing value loading principle are adopted in order to obtain formula of rock stress distribution. The comparison between calculated results and measured data shows that the formula and calculated results obtained are feasible and effective. The study results can provide references for similar projects in the future.

Key words: Longsheng Tunnel, multidisplacement back analysis method, stress releasing rate, primary support, shallow cover and unsymmetrical pressure, monitoring

CLC Number:

U 45

LIU Yingqi, ZHANG Xiedong, CHEN Weidong, XU Shunlian, ZHANG Hang. Study of Load Distribution Rules of Primary Support of  Shallowcovered Unsymmetrically Pressured Tunnel by Using  Multidisplacement Back Analysis Method[J]. Tunnel Construction, 2016, 36(7): 832-836.

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Study of Load Distribution Rules of Primary Support of  Shallowcovered Unsymmetrically Pressured Tunnel by Using  Multidisplacement Back Analysis Method

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