Three-dimensional multilayer cylindrical tunnel model for calculating train-induced dynamic stress in saturated soils

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• 作者：Honggui Di ^{dihongguila@126.com" class="auth_mail" title="E-mail the corresponding author} ; Shunhua Zhou ; ^{zhoushh@tongji.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Chao He ^{1310756@tongji.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Xiaohui Zhang ^{1988xiaohui@tongji.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Zhe Luo ^{zluo@tongji.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Shield tunnel ; Saturated soils ; Train load ; Dynamic stress
• 刊名：Computers and Geotechnics
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：80
• 期：Complete
• 页码：333-345
• 全文大小：1315 K

文摘

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.