Three-Dimensional Numerical Modeling of Freezing Construction of Underpass Tunnels Considering Orthotropic Anisotropy of Frozen Soil
Publication: International Journal of Geomechanics
Volume 24, Issue 10
Abstract
Compared to traditional tunnel construction, artificial freezing involves two distinct stages: freezing and thawing. However, this process can pose a risk to the surrounding environment if it is not possible to accurately analyze the frost heave and thawing settlement during the freezing process. The thermomechanical coupled mathematical model of formation frost heave was established by considering boundary conditions, such as formation temperature and convective heat transfer, and introducing the parameters of instantaneous volumetric strain and denaturation characteristic coefficient. In addition, the numerical analysis method for the whole construction process of the tunnel by the horizontal freezing method was established by programming the user subroutine that takes into account the characteristic coefficients of frozen soil relying on the secondary development technology of ABAQUS (version 2022). Then, the method was applied to the horizontal freezing engineering of a double-line tunnel, and the distribution laws of the freezing temperature field and frost heave displacement field were obtained and compared with the field measurement results. The numerical analysis method for determining the deformation law of the ground surface has been shown to be reliable through comparison with field measurements. This method can serve as a reference for designing effective ground surface heaving control schemes during the freezing construction period of tunnels in complex environments.
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Data Availability Statement
The data sets generated and analyzed during the current study are available from the corresponding author upon reasonable request.
Acknowledgments
This research was supported by the Research on Graduate Science Project in Anhui Province, China (No. YJS20210383), the National Natural Science Foundation of China (Grant No. 52378384), Anhui Provincial Natural Science Foundation of China (No. 2308085ME188), and Graduate Innovation Fund Project of Anhui University of Science and Technology (No. 2020CX2024)), and the Research Activities Fund Project for Reserve Candidate of Academic and Technical Leaders of Anhui Province, China (Grant No. 2018H170).
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Published In
International Journal of Geomechanics
Volume 24 • Issue 10 • October 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Apr 15, 2023
Accepted: Mar 12, 2024
Published online: Jul 16, 2024
Published in print: Oct 1, 2024
Discussion open until: Dec 16, 2024
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