A Steel Tube Concrete Sleeper Suitable for Ballastless Track

Abstract

The invention discloses a steel pipe concrete sleeper suitable for ballastless tracks, which comprises two or more sleeper concrete blocks and a sleeper connecting piece for connecting the sleeper concrete blocks, the sleeper concrete block is in a block structure, and is made of concrete It is made by pouring, and there are embedded parts for fixing the rails and steel mesh or stirrups connecting the sleeper connectors; the sleeper connectors are composed of a plurality of hollow steel pipes arranged horizontally between the concrete blocks of the sleeper. During the block pouring process, the hollow steel pipe is filled with concrete at the same time to form the concrete filled steel pipe, and then the sleeper connector and the concrete block of the sleeper are poured into one body. In the invention, the concrete-filled steel tube is applied in the concrete sleeper of ballastless track, the concrete-filled steel tube is used as the connector of the sleeper block, and the concrete-filled steel tube and the concrete block of the sleeper are integrally formed, so as to effectively increase the geometric shape and position retention capacity of the sleeper, reduce the amount of steel, and have the advantages of simple preparation , Strong constructability and so on.

Description

technical field [0001] The invention belongs to the field of ballastless track concrete sleepers, and more specifically relates to a steel tube concrete sleeper suitable for ballastless tracks. Background technique [0002] In the pillow ballastless track system, the function of the sleeper is mainly to provide the positioning of the embedded parts of the fasteners and the determination of the geometric shape of the track during the construction of the ballastless track bed slab. The correctness and the reduction of the adjustment amount of fasteners during the fine adjustment of the rail as much as possible require that the sleeper has a good shape and position retention ability, and its deformation, bending and torsion resistance during the manufacturing, storage, transportation and construction process should meet Relevant requirements; on the other hand, in order to effectively control the width and number of cracks between the new and old concrete of the precast concret...

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Problems solved by technology

[0004] However, further studies have shown that the above-mentioned sleepers still have the following problems: (1) The Stdedf type ballastless track adopts block concrete sleepers, and the concrete blocks of the sleepers are connected with angle steel to increase stability. The production process of this sleeper is simple, but the sleepers use angle steel (2) Radar 2000 and CRTS Ⅰ type block sleeper reinforcement trusses are space welded structures with multiple straight chord reinforcement bars and two wave-shaped web reinforcement bars. Rolling, straightening, bending, welding and other processes are produced. The production of the steel truss requires special equipment. The process is complicated and the equipment is expensive, resulting in high cost of the sleeper. It is difficult and time-consuming to adjust the wavelength of the wave-shaped web. (3) The trapezoidal sleeper with steel pipe as the connecting part mainly uses steel pipe to realize the connection of two longitudinal beams. The prepared sleeper is suitable for ballasted track. During the preparation process of the sleeper, the end of the steel pipe needs to be Special treatment, such as end leveling or the use of prestressed steel bars and reinforcing rods to achieve effective connection between steel pipes and longitudinal beams and prevent rotation, the preparation process is complicated and cannot be implemented on-site

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