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High-speed railway subgrade structure design method

A technology for high-speed railway and structural design, applied in design optimization/simulation, roads, instruments, etc., and can solve problems such as lack of physical and mechanical states

Active Publication Date: 2020-06-02
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +4
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Problems solved by technology

[0010] Aiming at the problem that the design method of high-speed railway subgrade bed structure is deficient in clearly characterizing the physical and mechanical state of the materials of each layer of subgrade bed, the present invention proposes a high-speed railway subgrade structure design method

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Embodiment Construction

[0057] 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 high-speed railway subgrade structure optimization method based on multi-layer system theory design are as follows:

[0058] (1) Determine the subgrade structure of the high-speed railway and the structural form of the subgrade surface load distribution;

[0059] The invention conducts research on the ballasted track subgrade of the Chinese high-speed railway, and fully considers the service character...

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Abstract

The invention relates to a high-speed railway subgrade structure design method which comprises the following steps: determining a high-speed railway subgrade structure form and determining a subgradesurface load distribution form; establishing a multilayer roadbed system model; establishing a single-layer soil body stress-strain relationship analytical solution; proposing a subgrade stress and displacement expression considering the material difference of each layer; considering a nonlinear relationship between subgrade filler strain and deformation modulus, and constructing a subgrade structure design method based on iterative computation; and optimizing a subgrade structure based on a subgrade surface dynamic deformation and subgrade bottom layer dynamic strain comprehensive control criterion. The design method is based on the multi-layer system theory, the physical law of each layer structure of the subgrade bed in the service process can be more reasonably represented, the optimalresult of subgrade design is economically and effectively given, and meanwhile, the stability and high efficiency of high-speed rail subgrade design are ensured.

Description

technical field [0001] The invention relates to the technical field of high-speed railways, in particular to a method for designing a high-speed railway embankment structure. Background technique [0002] The subgrade is the foundation of the railway, which is related to the safe and efficient operation of the railway. The subgrade is the foundation of the track structure. With the continuous increase of train speed, especially the application of high-speed railways, the subgrade structure is required to provide smoother and more stable support for the upper structure. The rational design of the subgrade and the compaction quality of the filling project It is fundamental to determine its structural performance. [0003] At present, for the design method of high-speed railway subgrade, the design criteria of controlling the dynamic deformation of the subgrade surface and the dynamic strain of the subgrade bed are mainly used, but a lot of simplifications have been made, and ...

Claims

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Application Information

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IPC IPC(8): G06F30/13G06F30/20E01B2/00G06F119/14
CPCE01B2/00
Inventor 叶阳升张千里蔡德钩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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