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Design method of ballastless track roadbed structure of high-speed railwayHigh-speed railway ballastless track roadbed structure design method

A ballastless track, high-speed railway technology, applied in the direction of roads, tracks, design optimization/simulation, etc., can solve the problem of not considering the nonlinear relationship between the modulus of the subgrade filler and the strain, etc.

Active Publication Date: 2020-06-26
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +4
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Problems solved by technology

[0003] In view of the above, the current design method of high-speed railway subgrade is mainly suitable for ballasted track subgrade, and does not consider the nonlinear relationship between subgrade filler modulus and strain. It is urgent to develop a set of structural design methods suitable for high-speed railway ballastless track subgrade

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  • Design method of ballastless track roadbed structure of high-speed railwayHigh-speed railway ballastless track roadbed structure design method
  • Design method of ballastless track roadbed structure of high-speed railwayHigh-speed railway ballastless track roadbed structure design method
  • Design method of ballastless track roadbed structure of high-speed railwayHigh-speed railway ballastless track roadbed structure design method

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[0042] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention. The main steps of the subgrade structure design method for high-speed railway ballastless track are as follows:

[0043] (1) Propose a simplified model of ballastless track load distribution

[0044] The invention studies the ballastless track subgrade of the Chinese high-speed railway, and fully considers the service characteristics and load transfer characteristics of the ballastless track structure. Schematic diagram o...

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Abstract

The invention relates to a design method of a ballastless track roadbed structure of a high-speed railway. The method comprises the following steps of providing aA simplified model of ballastless track load distribution is provided; establishing a dynamic modulus-strain relationship model of the coarse-particle roadbed filler; carrying out homogenization treatment on the supporting layer, the subgrade surface layer and the subgrade bottom layer by adopting modulus and thickness equivalent assumption of an Odemark method, and calculating subgrade stress and strain from the supporting layer by adopting a Buchner Boussinesq formula; considering a nonlinear relationship between roadbed filler strain and deformation modulus, and constructing a roadbed structure design method based on iterativecomputation; and optimizing a roadbed structure based on roadbed surface dynamic deformation and a roadbed bottom layer dynamic strain control criterion. According to the design method, fFor the ballastless track roadbed structure, the roadbed load distribution rule can be more reasonably represented, the influence of the nonlinear relationship between roadbed filler strain and deformation moduluson roadbed stress-strain calculation is reflected, and the refinement degree of ballastless track roadbed structure design is improved.

Description

technical field [0001] The invention relates to the technical field of high-speed railways, in particular to a method for designing a ballastless track subgrade structure of a high-speed railway. Background technique [0002] At present, the design methods of the subgrade bed structure of high-speed railways in various countries include: the control method of the deformation amount of the top surface of the subgrade, the control method of the deformation modulus of the subgrade surface, and the control method of the filling strength of the lower part of the subgrade bed surface. my country mainly adopts the design method of controlling the dynamic deformation of the subgrade surface and the dynamic strain of the subgrade bed layer, but the simplified treatment model for subgrade loads is only for ballasted tracks, and does not consider the nonlinear relationship between the modulus of subgrade filler and strain. The control index of the dynamic strain of the subgrade bed is a...

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Application Information

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IPC IPC(8): G06F30/20E01B1/00E01B2/00
CPCE01B1/002E01B2/00
Inventor 叶阳升蔡德钩张千里韩自力魏少伟闫宏业尧俊凯陈锋姚建平
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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