Concrete-filled steel tube sleeper for ballastless track

Abstract

The invention discloses a concrete-filled steel tube sleeper for a ballastless track. The concrete-filled steel tube sleeper for the ballastless track comprises two or more sleeper concrete blocks and sleeper connecting parts used for connecting the sleeper concrete blocks. Each sleeper concrete block is of a block-shaped structure and formed by pouring concrete, and each sleeper concrete block is internally provided with an embedded part for fixing the steel track and a steel-bar mesh or a stirrup connected with the corresponding sleeper connecting part. Each sleeper connecting part is composed of a plurality of hollow steel tubes transversely arranged between the corresponding sleeper concrete blocks. In the pouring process of the sleeper concrete blocks, the hollow steel tubes are filled with concrete at the same time, so that concrete-filled steel tubes are formed, and accordingly the sleeper connecting parts and the sleeper concrete blocks are integrated through pouring. The concrete-filled steel tubes are applied to the concrete sleeper for the ballastless track, the concrete-filled steel tubes are used as the sleeper connecting parts, and the concrete-filled steel tubes and the sleeper concrete blocks are formed integrally, so that the geometry retention capacity of the sleeper is effectively improved, and steel consumption is reduced; the sleeper has the advantages of being easy to manufacture, high in constructability and the like.

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 block sleeper steel bar trusses are space welded structures of multiple straight chord steel bars and two wave-shaped web bar steel bars, which are cold-rolled , Straightening, bending, welding and other processes. 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, and the site adaptability is poor. (3) Trapezoidal sleepers with steel pipes as connecting parts, which mainly use steel pipes to realize the connection of two longitudinal beams. The prepared sleepers are suitable for ballasted tracks. In the preparation process of the sleepers, the ends of the steel pipes need to be specially 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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