Experimental Study on Dynamic and Static Mechanical Properties of Coarse-grained Soil Filled in High-speed Railway Subgrade

被引：0
|
作者：
Wang T. [1 ,2 ]
Zhang F. [1 ,2 ]
Song H. [2 ]
Bu J. [1 ,2 ]
Yin Z. [2 ]
机构：
[1] State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang
[2] Key Laboratory of Roads and Railway Engineering Safety Control, Ministry of Education, Shijiazhuang Tiedao University, Shijiazhuang
来源：
Tiedao Xuebao/Journal of the China Railway Society | 2022年 / 44卷 / 04期
关键词：
Coarse-grained soil; Cumulative plastic strain; Dynamic and static triaxial test; Dynamic stress; High-speed railway;
D O I：
10.3969/j.issn.1001-8360.2022.04.016
中图分类号：
学科分类号：
摘要：
Considering the influence of the fine-grained content and water content, the tests on the static and dynamic characteristics of coarse-grained soil in high-speed railway subgrade were conducted to analyze the deformation characteristics and strength evolution characteristics of coarse-grained soil under different static loads and confining pressures. The dynamic stress-strain characteristics and cumulative plastic deformation characteristics of coarse-grained soil under continuous dynamic loading were studied. The experimental results show that when the water content is high, the influence factors such as fine-grained soil content and confining pressure have little effect on the strength of coarse-grained soil. At the low water content, the coarse-grained soil with 10% fine-grained content has the best effect. Under the dynamic loading, the water content is still the main reason for the large cumulative plastic deformation of coarse-grained soil, and the coarse-grained soil with 5% fine-grained content has the best capability to resist the cumulative plastic deformation. The test results of this research have important reference value for the design of high-speed railway subgrade filling and safe operation of high-speed railway trains. © 2022, Department of Journal of the China Railway Society. All right reserved.
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页码：127 / 135
页数：8
相关论文
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