| Study on the subgrade deformation under high-speed train loading and water–soil interaction |
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| 基金项目： | 51305360)，the National Basic Research Program of China(Grant 2011CB711103)，the 2015 Doctoral Innovation Funds of Southwest Jiaotong University |
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| 摘 要： | It is important to study the subgrade characteristics of high-speed railways in consideration of the water–soil coupling dynamic problem,especially when high-speed trains operate in rainy regions.This study develops a nonlinear water–soil interaction dynamic model of slab track coupling with subgrade under high-speed train loading based on vehicle–track coupling dynamics.By using this model,the basic dynamic characteristics,including water–soil interaction and without water induced by the high-speed train loading,are studied.The main factors-the permeability coefficien and the porosity-influencin the subgrade deformation are investigated.The developed model can characterize the soil dynamic behaviour more realistically,especially when considering the influenc of water-rich soil.
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| 关 键 词： | Water-soil interaction High-speed train loading Finite difference method Subgrade deformation Permeability coefficient Porosity |
Study on the subgrade deformation under high-speed train loading and water–soil interaction |
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| Authors: | Jian Han Guo-Tang Zhao Xiao-Zhen Sheng Xue-Song Jin |
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| Institution: | 1. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China;2. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China;China Railway Corporation, Beijing 100844, China |
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| Abstract: | It is important to study the subgrade characteristics of high-speed railways in consideration of the water–soil coupling dynamic problem, especially when high-speed trains operate in rainy regions. This study develops a nonlinear water–soil interaction dynamic model of slab track coupling with subgrade under high-speed train loading based on vehicle–track coupling dynamics. By using this model, the basic dynamic characteristics, including water–soil interaction and without water induced by the high-speed train loading, are studied. The main factors-the permeability coefficient and the porosity-influencing the subgrade deformation are investigated. The developed model can characterize the soil dynamic behaviour more realistically, especially when considering the influence of water-rich soil. |
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| Keywords: | Water-soil interaction High-speed train loading Finite difference method Subgrade deformation Permeability coefficient Porosity |
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