Numerical simulation of deformation of strata and stacked tunnels under traffic loads of subway

HU Yao; LI Mingshuai; GUO Fei; XU Yinggang; LEI Huayang; WU Xiao; CHEN Xuejian

doi:10.11779/CJGE2023S20041

Volume 45 Issue S2

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Chinese Journal of Geotechnical Engineering > 2023 > 45(S2): 258-263. > DOI: 10.11779/CJGE2023S20041

HU Yao, LI Mingshuai, GUO Fei, XU Yinggang, LEI Huayang, WU Xiao, CHEN Xuejian. Numerical simulation of deformation of strata and stacked tunnels under traffic loads of subway[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(S2): 258-263. DOI: 10.11779/CJGE2023S20041

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Numerical simulation of deformation of strata and stacked tunnels under traffic loads of subway

1.
State Key Laboratory of Geological Disaster Prevention and Geological Environment Protection, Chengdu University of Technology, Chengdu 610059, China
2.
College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059, China
3.
CCCC (Tianjin) Eco-Environmental Protection Design & Research Institute Co., Ltd., Tianjin 300220, China
4.
School of Civil Engineering, Tianjin University, Tianjin 300350, China
5.
College of Water Resources and Hydropower, Wuhan University, Wuhan 430072, China

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Received Date: November 29, 2023
Available Online: April 19, 2024

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Abstract

Abstract

The traffic loads of subway have a significant impact on the strata and stacked tunnels. However, the existing studies have rarely focused on the deformation response of stacked tunnels and consider the influences of the location of the traffic loads. By selecting a stacked tunnel project in Tianjin, the excitation force function is used to determine the traffic loads, and numerical simulations are conducted to analyze the deformation of stacked tunnels under the traffic loads of subway. The results demonstrate that the position where the traffic loads of subway are applied significantly affects the displacement of strata and deformation of tunnels. Both S_max and i values are related to the location of data extraction. The critical influence range of lateral displacement caused by the traffic loads of subway is 1.5D from the center of the tunnel. Under the three conditions, the longitudinal deformations of the tunnels are overall downward. When the traffic loads of subway are applied only to the upper or the lower tunnel, the transverse deformation of the tunnel under the loads is large. When the loads are applied to two tunnels synchronously, both the two tunnels deform at the bottom.
- stacked tunnel,
- traffic load,
- excitation force function,
- numerical simulation,
- deformation characteristic

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References (15)

References

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