Design method of subgrade structure for high-speed railway
A high-speed railway and structural design technology, applied in design optimization/simulation, roads, buildings, etc., can solve problems such as lack of physical and mechanical states
Active Publication Date: 2020-08-25
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +4
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[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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[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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The invention relates to a high-speed railway embankment structure design method, including determining the structure form of the high-speed railway embankment, determining the form of load distribution on the embankment surface; establishing a multi-layer embankment system model; establishing an analytical solution for the stress-strain relationship of a single layer of soil; and proposing to consider the materials of each layer Different expressions of subgrade stress and displacement; considering the nonlinear relationship between subgrade filler strain and deformation modulus, construct a subgrade structure design method based on iterative calculation; based on the comprehensive control criterion of subgrade surface dynamic deformation and subgrade bed bottom dynamic strain, optimize subgrade structure . The design method of the present invention is based on the multi-layer system theory, which can more reasonably characterize the physical laws of each layer structure of the subgrade bed during the service process, economically and effectively give the optimal result of subgrade design, and at the same time ensure the stability of high-speed railway subgrade design and efficiency.
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 ...
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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