Three-dimensional multilayer cylindrical tunnel model for calculating train-induced dynamic stress in saturated soils |
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| Institution: | 1. College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, PR China;2. Department of Mechanics and Maritime Sciences, Chalmers University of Technology, SE-412 96 Göteborg, Sweden;3. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, PR China;1. College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, PR China;2. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, PR China;1. Shanghai Key Laboratory of Rail Infrastructure Durability and System Safety, and Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai, 201804, China;2. Department of Civil Engineering, McMaster University, Hamilton, ON L8S 4L7, Canada;1. College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou, 310014, PR China;2. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou, 310058, PR China;3. Department of Mechanics and Maritime Sciences, Chalmers University of Technology, SE-412 96, Göteborg, Sweden;1. Department of Civil and Architectural Engineering, College of Engineering, University of Qatar, P.O. Box 2713, Doha, Qatar;2. Department of Civil Engineering, KU Leuven, Kasteelpark Arenberg 40, B-3001 Leuven, Belgium;3. Department of Architecture, KU Leuven, Kasteelpark Arenberg 1, B-3001 Leuven, Belgium;4. Engineering Department, Cambridge University, Trumpington Street, Cambridge CB2 1PZ, United Kingdom |
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| Abstract: | This study proposes an improved tunnel model for evaluating train-induced dynamic stress in saturated soils, which can consider multiple moving loads, grouting layer and pore-water pressure. Using Shanghai Metro’s actual parameters for train speed, tunnel, grouting layer and soils, the analysis of the spatial distribution of dynamic stress for soils and stress state of various locations under moving train loads shows that neglecting effects such as pore-water pressure can lead to underestimating dynamic normal stress and overestimating dynamic shear stress in the soils below tunnel. This model can be further extended to investigate principal stress axes rotations and tunnel settlement. |
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| Keywords: | Shield tunnel Saturated soils Train load Dynamic stress |
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