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Research paper | Open Access

A constitutive model for cyclic densification of coarse-grained soil filler for the high-speed railway subgrade considering particle breakage

Yangsheng Ye1( ), Degou Cai1, Lin Geng2, Hongye Yan1, Junkai Yao1, Feng Chen1
State Key Laboratory for Track Technology of High-Speed Railway, China Academy of Railway Sciences Corporation Limited, Beijing, China
Beijing Tieke Special Engineering Technology Corporation Limited, China Academy of Railway Sciences Corporation Limited, Beijing, China
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Abstract

Purpose

This study aims to propose a semiempirical and semitheoretical cyclic compaction constitutive model of coarse-grained soil filler for the high-speed railway (HSR) subgrade under cyclic load.

Design/methodology/approach

According to the basic framework of critical state soil mechanics and in view of the characteristics of the coarse-grained soil filler for the HSR subgrade to bear the train vibration load repeatedly for a long time, the hyperbolic empirical relationship between particle breakage and plastic work was derived. Considering the influence of cyclic vibration time and stress ratio, the particle breakage correction function of coarse-grained soil filler for the HSR subgrade under cyclic load was proposed. According to the classical theory of plastic mechanics, the shearing dilatation equation of the coarse-grained soil filler for the HSR subgrade considering particle breakage was modified and obtained. A semiempirical and semitheoretical cyclic compaction constitutive model of coarse-grained soil filler for the HSR subgrade under cyclic load was further established. The backward Euler method was used to discretize the constitutive equation, build a numerical algorithm of “elastic prediction and plastic modification” and make a secondary development of the program to solve the cyclic compaction model.

Findings

Through the comparison with the result of laboratory triaxial test under the cyclic loading of coarse-grained soil filler for the HSR subgrade, the accuracy and applicability of the cyclic compaction model were verified. Results show that the model can accurately predict the cumulative deformation characteristics of coarse-grained soil filler for the HSR subgrade under the train vibration loading repeatedly for a long time. It considers the effects of particle breakage and stress ratio, which can be used to calculate and analyze the stress and deformation evolution law of the subgrade structure for HSR.

Originality/value

The research can provide a simple and practical method for calculating deformation of railway under cyclic loading.

Keywords

High-speed railwaySubgradeCoarse-grained soil fillerParticle breakageCumulative deformationStress ratioCyclic densification model

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Railway Sciences
Volume 1 Issue 1,
July 2022
Pages 1-15
DOI: 10.1108/RS-04-2022-0020
Cite this article:
Ye Y, Cai D, Geng L, et al. A constitutive model for cyclic densification of coarse-grained soil filler for the high-speed railway subgrade considering particle breakage. Railway Sciences, 2022, 1(1): 1-15. https://doi.org/10.1108/RS-04-2022-0020

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Received: 10 January 2022
Revised: 01 February 2022
Accepted: 11 April 2022
Published: 23 May 2022
© Yangsheng Ye, Degou Cai, Lin Geng, Hongye Yan, Junkai Yao and Feng Chen. Published in Railway Sciences.

This article is published under the Creative Commons Attribution (CC BY 4.0) licence. Anyone may reproduce, distribute, translate and create derivative works of this article (for both commercial and non-commercial purposes), subject to full attribution to the original publication and authors. The full terms of this licence may be seen at http://creativecommons.org/licences/by/4.0/legalcode
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