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.

引用

页码：127 / 135

页数：8

共 27 条

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