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Journal of Zhejiang University SCIENCE A

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Numerical study on failure propagation between two closely spaced tunnels


Author(s):  Gang ZHENG, Rui ZHU, Ji-bin SUN, Tian-qi ZHANG, Jing-bo TONG, Rui-kun Wang, Yu DIAO

Affiliation(s):  School of Civil Engineering, Tianjin University, Tianjin 300072, China

Corresponding email(s):  tianqizhang@tju.edu.cn

Key Words:  Failure propagation; Closely spaced tunnels; Coupled Eulerian-Lagrangian (CEL)


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Gang ZHENG, Rui ZHU, Ji-bin SUN, Tian-qi ZHANG, Jing-bo TONG, Rui-kun Wang, Yu DIAO. Numerical study on failure propagation between two closely spaced tunnels[J]. Journal of Zhejiang University Science A, 1998, -1(8): .

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author="Gang ZHENG, Rui ZHU, Ji-bin SUN, Tian-qi ZHANG, Jing-bo TONG, Rui-kun Wang, Yu DIAO",
journal="Journal of Zhejiang University Science A",
volume="-1",
number="-1",
pages="",
year="1998",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2000502"
}

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A1 - Yu DIAO
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Abstract: 
An increasing number of engineering accidents have shown that the failure of a tunnel can propagate to a neighbouring tunnel. However, due to the complex interaction between the failed tunnel structure and the soil medium, the mechanism by which the failure is propagated between two closely spaced tunnels remains unclear. In this article, the coupled Eulerian-Lagrangian (CEL) modelling technique was adopted to investigate the influence of a failed tunnel (FT) on an adjacent tunnel, which was termed an “influenced tunnel” (IT). The safety of the IT was analysed in detail under different circumstances, such as different failure positions of the FT, different failure degrees of the FT, and different spatial relationships between the two tunnels. The simulation results indicated that the most adverse case may occur when the two tunnels are arranged as offsets and the IT is the upper tunnel. Under this circumstance, significant shear deformation may occur in IT because IT is located at the shear band of the FT.

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