Light roadbed structure of high-speed railway

Abstract

The invention discloses a light roadbed structure of a high-speed railway. The light roadbed structure comprises a box type roadbed, a cantilever structure and a rigid pile foundation, wherein the boxtype roadbed comprises a top plate which is integrally formed and horizontally arranged, two side wall plates which are vertically arranged and a bottom plate which is horizontally arranged, all thecomponents are fixedly connected to form a closed box-shaped structure, and the section of the closed box-shaped structure is in a closed rectangular shape; and the two ends of the top plate extend outwards to form outer cantilevers and extend towards the center line of the roadbed to form inner cantilevers, and damping rubber materials are filled between the adjacent inner cantilevers to seal andstop water. A track plate and a track supporting system are arranged on the top plate, an anti-collision wall, a cable trough and a contact net stand column base are sequentially arranged on the outer cantilevers, and a protective fence is arranged at the ends of the outer cantilevers. Vertical drainage ducts are formed in the positions, close to the outer side wall plates, of the top plate of the box type roadbed; a rigid pile foundation is arranged at the bottom of the box type roadbed. According to the method, the sloping range of the slope of the high-speed railway embankment is greatly reduced, the foundation reinforcement work amount is reduced, and the use amount of rigid piles and the filling amount of railway roadbed filler are reduced.

Description

technical field [0001] The invention belongs to the technical field of railway engineering, in particular to a light roadbed structure for high-speed railways. Background technique [0002] Most of the traditional high-speed railway subgrades are constructed by subgrade filler compaction. The subgrade section is mostly a standard trapezoidal section. These unfavorable factors also restrict the further popularization and application of traditional subgrade structures in high-speed railway construction. Especially for the high-speed railway turnout area and the connection line area, the use of traditional earth-filled subgrade structure not only has a large subgrade section, but also has the problem of mutual influence between the additional settlement deformation of the two subgrades. In order to reduce the land occupation of the traditional trapezoidal section subgrade structure and control the self-weight of the basic road structure, the retaining wall structure has been p...

AI Technical Summary

Problems solved by technology

[0002] Most of the traditional high-speed railway subgrades are constructed by subgrade filler compaction. The subgrade section is mostly a standard trapezoidal section. These unfavorable factors also restrict the further popularization and application of traditional subgrade structures in high-speed railway construction

Especially for the high-speed railway turnout area and the connecting line area, the traditional filling subgrade structure not only has a large subgrade section, but also has the problem of mutual influence of the additional settlement deformation of the two subgrades.

In order to reduce the land occupation of the traditional trapezoidal section subgrade structure and control the self-weight of the basic road structure, the retaining wall structure has been popularized and applied to a certain extent in the high-speed railway foundation. Finally, it is necessary to fill the subgrade filler and carry out compaction construction, resulting in relatively large lateral deformation of the light retaining wall, which is mainly used in the protection treatment of key parts in the project

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