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Research paper | Open Access

Current situation and development trend of design methods for subgrade structure of high speed railways

Yangsheng Ye1, Degou Cai1, Qianli Zhang2, Shaowei Wei1, Hongye Yan1, Lin Geng3( )
State Key Laboratory for Track Technology of High-Speed Railway, China Academy of Railway Sciences Corporation Limited, Beijing, China
China Academy of Railway Sciences Corporation Limited, Railway Engineering Research Institute, Beijing, China
State Key Laboratory of High Speed Railway Track Technology, China Academy of Railway Sciences Corporation Limited, Beijing, China
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Abstract

Purpose

This method will become a new development trend in subgrade structure design for high speed railways.

Design/methodology/approach

This paper summarizes the structural types and design methods of subgrade bed for high speed railways in China, Japan, France, Germany, the United States and other countries based on the study and analysis of existing literature and combined with the research results and practices of high speed railway subgrade engineering at home and abroad.

Findings

It is found that in foreign countries, the layered reinforced structure is generally adopted for the subgrade bed of high speed railways, and the unified double-layer or multi-layer structure is adopted for the surface layer of subgrade bed, while the simple structure is adopted in China; in foreign countries, different inspection parameters are adopted to evaluate the compaction state of fillers according to their respective understanding and practice, while in China, compaction coefficient, subsoil coefficient and dynamic deformation modulus are adopted for such evaluation; in foreign countries, the subgrade top deformation control method, the subgrade bottom deformation control method, the subsurface fill strength control method are mainly adopted in subgrade bed structure design of high speed railways, while in China, dynamic deformation control of subgrade surface and dynamic strain control of subgrade bed bottom layer is adopted in the design. However, the cumulative deformation of subgrade caused by train cyclic vibration load is not considered in the existing design methods.

Originality/value

This paper introduces a new subgrade structure design method based on whole-process dynamics analysis that meets subgrade functional requirements and is established on the basis of the existing research at home and abroad on prediction methods for cumulative deformation of subgrade soil.

Keywords

Design methodDevelopment trendHigh speed railwaySubgrade engineeringSubgrade bed structureExisting research

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Railway Sciences
Volume 2 Issue 3,
October 2023
Pages 289-309
DOI: 10.1108/RS-04-2023-0018
Cite this article:
Ye Y, Cai D, Zhang Q, et al. Current situation and development trend of design methods for subgrade structure of high speed railways. Railway Sciences, 2023, 2(3): 289-309. https://doi.org/10.1108/RS-04-2023-0018

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Received: 10 April 2023
Revised: 22 May 2023
Accepted: 22 May 2023
Published: 29 August 2023
© Yangsheng Ye, Degou Cai, Qianli Zhang, Shaowei Wei, Hongye Yan and Lin Geng. 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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