Analysis of dynamic characteristics of coarse-grained soil high embankment under traffic load

被引：0

作者：

He Z. ^{[1
,2
]}

Qiu J. ^{[2
]}

Ke W. ^{[2
]}

Fan D. ^{[2
]}

机构：

[1] Key Laboratory of Special Environment Road Engineering of Hunan Province, Changsha University of Science & Technology, Changsha

[2] School of Traffic and Transportation Engineering, Changsha University of Science & Technology, Changsha

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2020年 / 51卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Coarse-grained soil high embankment; Dynamic model test; Dynamic response; Traffic load;

D O I：

10.11817/j.issn.1672-7207.2020.09.022

中图分类号：

学科分类号：

摘要：

In order to study the dynamic response characteristics and stress field evolution law of coarse-grained soil high embankment under long-term traffic load, based on the similar theory, an indoor dynamic model test was carried out. In the test, the traffic load was reduced by a ratio and applied in the embankment model through a dynamic simulation device. The numerical model of coarse-grained soil high embankment was established by using MIDAS/GTS software.Through comparative analysis of the test results and theoretical calculation results, the dynamic characteristics of the coarse-grained soil high embankment under the action of traffic loads were discussed. The results show that the dynamic stress and displacement generated by the embankment reflect the characteristics of superimposed front and rear axial loads. At the same depth of the embankment, the traffic load has the greatest influence on the dynamic stress response of the embankment soil directly below the wheel. The impact of vehicle load on the embankment is significantly higher than that of vehicle speed on the embankment. At different depths of the embankment, the dynamic stress displays obvious hysteresis, and the dynamic stress curve has nonlinear variation characteristics of attenuation. Under cyclic loading, the cumulative deformation law of the embankment is divided into four phases, i. e. a gentle increase, a sharp rise, a slow rise and a stabilization phase. © 2020, Central South University Press. All right reserved.

引用

页码：2571 / 2579

页数：8

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