Numerical Analysis on Interaction Induced by Crosswise Tunneling

Peng Lu Gan; Xiao Wu Tang; Wen Ming Shen; Heng Yu Wang

doi:10.4028/www.scientific.net/AMM.580-583.1076

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 580-583Numerical Analysis on Interaction Induced by...

Numerical Analysis on Interaction Induced by Crosswise Tunneling

Abstract:

A position conflict exists between Harbin Urban Rail Transit Line No.1 and the branch tunnel of "7381" civil air defense tunnel. Intense tunnel interaction occurs when Line No.1 is perpendicularly tunneled across the branch tunnel. The investigation of the interaction is necessary. A 3D numerical simulation is established using FLAC^3D and the vault deformation around the tunnel intersection is analyzed. The vault settlement of Line No.1 increases by 1.4 times during crosswise tunneling, while the vault settlement of branch tunnel increases 21.0mm in addition. The affected region of the tunnel intersection is further revealed. The affected length of the vault of Line No.1 and branch tunnel is 7.5 times the diameter and 6 times the width respectively. In combination with monitoring data, the reinforcement effect is studied at last. Both the vault settlement and surface settlement are well controlled in the tunnel intersection.

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Periodical:

Applied Mechanics and Materials (Volumes 580-583)

Pages:

1076-1080

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.580-583.1076

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Online since:

July 2014

Authors:

Peng Lu Gan*, Xiao Wu Tang, Wen Ming Shen, Heng Yu Wang

Keywords:

Numerical Simulation, Reinforcement Measure, Tunnel Intersection, Vault Settlement

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