Deformation of tunnels in service induced by ground surface surcharge based on 3D random field

TIAN Ning; CHEN Jian; TIAN Kai-wei; ZHOU Ning-xi; HUANG Jue-hao

doi:10.11779/CJGE2022S2026

Volume 44 Issue S2

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Chinese Journal of Geotechnical Engineering > 2022 > 44(S2): 120-124. > DOI: 10.11779/CJGE2022S2026

TIAN Ning, CHEN Jian, TIAN Kai-wei, ZHOU Ning-xi, HUANG Jue-hao. Deformation of tunnels in service induced by ground surface surcharge based on 3D random field[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(S2): 120-124. DOI: 10.11779/CJGE2022S2026

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Deformation of tunnels in service induced by ground surface surcharge based on 3D random field

TIAN Ning^{1, 2,},
CHEN Jian^{1, 2, 3, 4, ,},
TIAN Kai-wei^{1, 2},
ZHOU Ning-xi^{1, 2},
HUANG Jue-hao^{1, 2}

1.
State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
Hubei Key Laboratory of Geo-Environmental Engineering, Wuhan 430071, China
4.
China-Pakistan Joint Research Center on Earth Sciences, Islamabad, Pakistan

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Received Date: December 07, 2022
Available Online: March 26, 2023

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Abstract

Abstract

With the rapid development of urban infrastructure and the further development of rail transit, the existing shield tunnels will inevitably be affected by the surrounding construction. The adjacent construction will cause the stress redistribution of the soil around the existing tunnels, thus causing additional deformation of the tunnels. The influences of ground surface surcharge on the deformation of the tunnels in service are studied in the three-dimensional spatially variable soil. The probabilistic analysis of the vertical settlement of the shield tunnels is investigated by using the finite element method and the random field theory. The influences of the scale of fluctuation and coefficient of variation on the probability of failure of the tunnel deformation are revealed as well. A simplified equivalent deterministic analysis method is proposed based on the random analysis results. The conclusions provide a simplified method for considering the spatial variability of soil parameters in similar engineering problems.
- 3D random field,
- spatial variability,
- ground surface surcharge,
- tunnel,
- random finite element method

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References

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