Shakedown analysis of soil arch in piled embankment of high-speed railway

被引：0
|
作者：
Bi Z. [1 ]
Gong Q. [1 ]
Zhou S. [1 ]
Han G. [1 ]
机构：
[1] Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai
来源：
Tiedao Xuebao/Journal of the China Railway Society | 2016年 / 38卷 / 11期
关键词：
Critical load; Cyclic loading; High-speed railway; Piled embankment; Shakedown; Soil arching effect;
D O I：
10.3969/j.issn.1001-8360.2016.11.015
中图分类号：
学科分类号：
摘要：
Soil arch in pile-supported embankment of high-speed railway is inevitably affected by long-term cyclic dynamic loads. Its stability under dynamic loads directly affects the stress distribution and accumulated deformation of the embankment, further affecting its service performance. However, current studies involving soil arch stability mainly focused on limit state analysis under static load and rarely presented quantitative description on the influence of dynamic loads on the degradation and collapse of soil arch. In this paper, based on the soil arch model of Hewlett and considering the effect of additional cyclic loading, the force-bearing features of pile top and soil among piles were analyzed. The optimum residual stress field was constructed using the shakedown theory in combination with the failure mode of soil arch. The elasticity, shakedown and failure stage of the stability of the arch foot under cyclic load were distinguished with the theoretical calculation of critical loads pe, psd and pp proposed in this paper. The results indicated that the regularities reflected by calculation values were in agreement with the model test. The critical value of the cumulative deformation failure of soil arch under long-term cyclic loading can be determined by the stability load, which is of guiding significance for the design of the pile supported embankment structure. © 2016, Editorial Office of Journal of the China Railway Society. All right reserved.
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页码：102 / 110
页数：8
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