Numerical Analysis of a Shallow-Buried Portal in Expressway Tunnel with Weak Rockmass

Pan Ke Gao; Yong Li Xie; Heng Bin Wu

doi:10.4028/www.scientific.net/AMM.256-259.1369

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 256-259Numerical Analysis of a Shallow-Buried Portal in...

Numerical Analysis of a Shallow-Buried Portal in Expressway Tunnel with Weak Rockmass

Abstract:

Aiming at the problems in construction for a shallow-buried and unsymmetrical loading portal in Banzhulin Tunnel in Yu-Xiang expressway, the finite element simulation were carried on to study the behavior for bench excavation method. Main results of numerical analysis as follows:the displacement of surrounding rock of right tunnel(as AR)at the horizontal direction is large and may larger than that of the left tunnel(as AL) at the vertical direction,and the largest deformation is 22.63mm,occuring at the key point DL. Compared with the data of monitoring measurement, the correctness of this simulation was proved.The behavior for deformation and stress of mountain tunnels as Banzhulin is basically mastered,and the displacement of rockmass is the key factor in tunnelling.

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Periodical:

Applied Mechanics and Materials (Volumes 256-259)

Pages:

1369-1372

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.256-259.1369

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Online since:

December 2012

Authors:

Pan Ke Gao, Yong Li Xie, Heng Bin Wu

Keywords:

Numerical Simulation, Shallow-Buried, Tunnelling, Unsymmetrical Pressure, Weak Rockmass

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