Analysis on Rigidity of Primary Support of Composite Lining and Its Influencing Factors

doi:10.3973/j.issn.1672-741X.2014.08.008

Tunnel Construction ›› 2014, Vol. 34 ›› Issue (8): 754-759.DOI: 10.3973/j.issn.1672-741X.2014.08.008

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Analysis on Rigidity of Primary Support of Composite Lining and Its Influencing Factors

LI Chunqing^{1, 2}, LIANG Qingguo^{1, 2}, WU Xuyang^{1, 2}, SUN Kai³

(1. Key Laboratory of Road & Bridge and Underground Engineering of Gansu Province, Lanzhou 730070, Gansu, China; 2. College of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, China; 3. The Second Engineering Group Co., Ltd., of China Railway Erju Co., Ltd., Chengdu 610031, Sichuan, China)

Received:2014-05-23 Revised:2014-07-11 Online:2014-08-20 Published:2014-08-21

Abstract

Abstract:

There are a lot of superlarge crosssection loess tunnels on BaojiLanzhou passengerdedicated railway. In this article, thestateoftheart of studies on the design of the primary support of loess tunnels on passengerdedicated railways is presented, the equivalent elastic modulus of the primary support of the tunnels is calculated by means of conversion method and simulation method, comparison and contrast is made between the calculation results obtained by these two calculation methods, the value of the elastic modulus of the primary support and the pressure of the primary support are analyzed on basis of the monitoring data of the rock mass pressure. The study results show that the equivalent elastic modulus of the primary support calculated by simulation method is more accurate. The paper can provide reference for the design and construction of similar projects in the future.

Key words: loess tunnel, composite lining, primary support, elastic modulus, shotcrete, support pressure

CLC Number:

U 455.6

LI Chunqing, LIANG Qingguo, WU Xuyang, SUN Kai. Analysis on Rigidity of Primary Support of Composite Lining and Its Influencing Factors[J]. Tunnel Construction, 2014, 34(8): 754-759.

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Analysis on Rigidity of Primary Support of Composite Lining and Its Influencing Factors

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