A kind of elastic limit device of track bed board

Abstract

The invention belongs to the technical field of railway tracks and provides an elastic limiting device of a roadbed slab. The elastic limiting device of the roadbed slab comprises roadbed slab bodies (1) and a limiting boss (5) and further comprises an elastic limiting body located in a limiting groove formed by grooves or gaps of two adjacent roadbed slab bodies. The elastic limiting body in contact with the roadbed slab bodies (1) and matched with the limiting boss (5) comprises an elastic buffer layer (4), a limiting layer I (2) and a limiting layer II (3). The limiting layer I (2) and the limiting layer II (3) are adjacent and can vertically slide. The limiting layer I (2) and the limiting layer II (3) are respectively combined with the roadbed slab bodies (1) and the limiting boss (5). The elastic limiting device achieves relative vertical motion of the roadbed slab under the vehicle running load condition, limits transverse, longitudinal and torsional deformation of the roadbed slab and ensures the stability and safety of train operation.

Description

Technical field [0001] The invention belongs to the technical field of railway tracks, and in particular relates to an elastic limit device of a track bed slab. Background technique [0002] With the development of green and efficient rail transit and technological progress, especially the rapid development of urban rail transit construction, it provides people with fast, comfortable and safe transportation tools. At the same time, the vibration and noise generated during rail transit operations also seriously affect surrounding work , The quality of living environment and the safety of surrounding buildings, and the safety and service life of rail transit facilities will also be directly affected by system vibration. Ballastless track bed vibration isolation systems, especially floating slab track beds, are widely used to increase the vibration isolation performance of the track system. This type of vibration isolation design usually adds an elastic layer under the track bed use...

AI Technical Summary

Problems solved by technology

The ballastless ballast bed vibration isolation system, especially the floating slab ballast bed, is widely used to increase the vibration isolation performance of the track system. This vibration isolation design usually adds an elastic layer under the ballast bed used to fix the rail, such as rubber elastic pad or steel Springs, etc., isolate the transmission of the track vibration caused by the passing of the train to the foundation. This floating design of the ballast bed with an elastic vibration isolation layer added between the ballast bed slab and the ballast bed foundation makes the ballast bed slab dynamically deform relative to the ballast bed foundation under the running load of the train. Generally, the elastic design of the floating slab mainly considers the use of low-rigidity elastic elements to support the ballast bed in the vertical direction, such as rubber pads or steel springs, etc., but the connection between the ballast bed and the ballast bed foundation in the horizontal direction often uses simple elastic limit layers such as Rubber floating slab bed ( Figure 9 ), usually the elastic limiting layer is directly connected to the ballast bed slab and the side wall of the ballast bed foundation. The connection of the ballast bed foundation is unconstrained between the ballast bed slab and the ballast bed foundation, such as the steel spring floating slab design ( Figure 10 ), the lateral and longitudinal resistance and stability of the track bed only depend on the lateral and longitudinal shear stiffness of the support spring

Since the track rails are installed on the ballast bed plate through fasteners, the dynamic deformation of the ballast bed plate or the movement relative to the ballast bed foundation under the vehicle operating load condition, especially the large horizontal deformation, that is, the lateral and longitudinal deformation of the ballast bed plate, will reduce the stability of the train operation sex and security

In addition, when replacing and repairing the elastic layer under the track bed plate of the track bed system with replaceable track bed, such as the patent CN102220733B "Nonlinear Interchangeable Track Bed and Vibration Damping Fastener Combination System", it is filled between the positioning boss and the track bed plate The buffer material in the room is not easy to remove and restore

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