Calculation of soil deformation caused by construction of shield tunnels in composite layered strata

WEI Gang; ZHU Dehan; WANG Zhe; QI Yongjie; JIANG Haibo; XIANG Pengfei

doi:10.11779/CJGE20230151

Volume 46 Issue 5

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Chinese Journal of Geotechnical Engineering > 2024 > 46(5): 919-926. > DOI: 10.11779/CJGE20230151

WEI Gang, ZHU Dehan, WANG Zhe, QI Yongjie, JIANG Haibo, XIANG Pengfei. Calculation of soil deformation caused by construction of shield tunnels in composite layered strata[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(5): 919-926. DOI: 10.11779/CJGE20230151

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Calculation of soil deformation caused by construction of shield tunnels in composite layered strata

WEI Gang^{1, 2,},
ZHU Dehan³,
WANG Zhe³,
QI Yongjie⁴,
JIANG Haibo^{5, 6},
XIANG Pengfei⁶

1.
Key Laboratory of Safe Construction and Intelligent Maintenance for Urban Shield Tunnels of Zhejiang Province, Hangzhou City University, Hangzhou 310015, China
2.
Zhejiang Engineering Research Center of Intelligent Urban Infrastructure, Hangzhou City University, Hangzhou 310015, China
3.
Institute of Geotechnical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
4.
Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China
5.
College of Hydraulic and Civil Engineering, Xinjiang Agriculture University, Urumqi 830052, China
6.
College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi 832003, China

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Received Date: February 21, 2023
Available Online: May 14, 2024

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Abstract

Abstract

In order to solve the problem of soil deformation caused by shield construction under the condition of multi-layer horizontal soil covering on the upper part of the shield and the upper and lower horizontal layers in the excavation face, on the basis of the unified analytical method for soils, the influence parameters of soil conditions are modified so that the soil deformation can be calculated under composite strata, and the focus range of soil movement is re-divided. By combining the modified unified soil analytical method with the analogous stochastic medium theory method (ASMTM), a method can be obtained to solve the problem of multiple soil strata on the shield excavation surface, and can be applied to the shield construction with any shapes of excavation surface. The results show that the feasibility of the proposed method is verified through several engineering cases. The nonlinear change of soil deformation occurs when the thickness of a certain soil layer increases by the same amount. Since the soil loss has more influences on the soil deformation than the deformation transfer path, the soil deformation may be different under the same cavity diameter ratio.

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References (18)

References

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