Characteristics of cumulative deformation evolution state of subgrade filler under cyclic loading and experimental verification

被引：0
|
作者：
Luo Q. [1 ]
Liu G. [2 ,3 ]
Zhang L. [1 ]
Jiang L. [1 ]
Xiong Y. [1 ]
机构：
[1] MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu
[2] Institute of Architecture and Civil Engineering, Xihua University, Chengdu
[3] Key Laboratory of Highway Engineering of Sichuan Province, Southwest Jiaotong University, Chengdu
来源：
| 1600年 / Science Press卷 / 38期
关键词：
Cyclic loading; Distinguishing method of powers level; Evolution state of cumulative deformation; High-speed railway; Model test; Subgrade;
D O I：
10.3969/j.issn.1001-8360.2016.07.016
中图分类号：
学科分类号：
摘要：
For the purpose of realizing the effective control of the cumulative deformation of high-speed railway subgrade, the characteristics of cumulative deformation evolution state of subgrade filler under cyclic loading have been analyzed. Four categories of the status of the cumulative deformation evolution of the subgrade filler with the change of cylic loading levels will appear, including immediate stabilization, gradual stabilization, gradual damage and immediate damage. What's more, the mathematical criteria were built based on the development of the cumulative deformation rate with the increasing of load times, which was described by the negative power function. Through the construction of the element filler model, the whole process simulation of the four states of the cumulative deformation of the model under the cyclic loading was realized, and three corresponding load thresholds were obtained. In view of the great difference of the ballastless and ballast track systems of high speed railway in adapting to the settlement of the foundation structure, the deformation control principles and technical conditions of the subgrade structures of the ballast and ballastless tracks to meet the long-term stabbility and fast stability were specified. The results privide a theoretical and experimental basis for the deformation control design of high-speed railway subgrade structures. © 2016, Editorial Office of Journal of the China Railway Society. All right reserved.
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页码：110 / 116
页数：6
相关论文
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