Railroad sleeper with multiplayer structure

Abstract

A railroad sleeper comprises a sleeper body (1) and track bearing areas (3). Every track bearing area (3) is provided with a track bearing surface (5), a first reinforcing element (6) and a second reinforcing element (7). The sleeper body (1), the first reinforcing elements (6) and the second reinforcing elements (7) are made of composite materials, the surface of the sleeper body (1) is provided with a multiplayer structure, and the thermal expansion coefficient of the multiplayer structure is sequentially reduced outwards from the surface of the sleeper body (1). The railroad sleeper is low in density and long in service life, not only has good damping effect and is high in load carrying capacity, but also is stable in performance and high in weather resistance and guarantees tightness of connection of every layer.

Description

technical field [0001] The invention relates to the field of railway tracks, in particular to a railway sleeper with a multi-layer structure. Background technique [0002] Railway is currently one of the most important means of transportation in the world. With the development of railways towards high speed, heavy load and environmental protection, the requirements for tracks are getting higher and higher. As an important part of the track, the sleeper is used as a cushion under the rails, and maintains the gauge, level, height and direction between two or more strands of rails through the mutual connection parts, and prevents the rails from being caused by trains. The longitudinal crawling generated by driving and the equal distribution of various loads on the rails on the foundation of the ballast bed, its materials and structures are constantly being developed and updated. [0003] Currently used sleepers mainly include wooden sleepers, steel sleepers and concrete sleepe...

AI Technical Summary

Problems solved by technology

As a sleeper commonly used in traditional railway tracks, although wood sleepers have the advantages of low cost, high elasticity, light weight, and good insulation, they also have insurmountable shortcomings, mainly in: easy weathering and cracking, short service life, generally only 15 years; more importantly, it consumes a large amount of forest resources and causes serious environmental problems

Steel sleepers have been used in some countries in Europe and South America. The advantages are: long service life, up to 50-60 years; large sleeper spacing to reduce consumption; can be made by smelting a large amount of scrap iron and steel, and can be returned to the furnace after being scrapped. However, its disadvantages are: high cost, heavy volume, and high noise, so it cannot be widely used

However, this reinforced fiber synthetic sleeper and its manufacturing method cannot ensure the sufficient and uniform mixing and distribution of fiber reinforced materials and resins. In addition, the adhesion between the resin and fiber reinforced materials is not strong. During the extrusion molding process, the fiber reinforced materials Easy to deform, make fiber reinforced material and numerical distribution layout, affect the quality of the sleeper

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