Elastic long sleeper ballast bed for urban rail transit

Abstract

The invention discloses an elastic long sleeper ballast bed for urban rail transit. Bilateral drainage ditches are arranged on two sides of the ballast bed, and a drainage pipe embedded into the ballast bed is arranged in the middle of the ballast bed. Vibration reduction base plates are installed on the two sides of the bottom of the prestressed concrete long sleeper, low-rigidity base plates areinstalled in the middle of the bottom of the long sleeper, and isolation base plates are installed around the side face of the long sleeper. Sundry-preventing filter block structures for preventing sundries from entering are arranged on the two sides of the middle of the long sleeper, and the contact range of the top of the drainage pipe and the bottom of the long sleeper and the contact range ofthe bottom of the sundry-preventing filter block are cut off. Inspection wells are arranged in the center of the ballast bed at intervals, and the inspection wells are communicated with the embeddeddrainage pipe. The technical problems that the flatness and smoothness of the evacuation face of a traditional elastic long sleeper ballast bed with a central open ditch are poor, a ditch forming formwork is complex, the smoothness and stability of a track structure are greatly influenced by construction factors, the overall strength of the ballast bed structure is weakened, and the vibration reduction performance is influenced by local formwork running can be solved.

Description

technical field [0001] The invention relates to a technique for improving urban rail transit facilities. Background technique [0002] The traditional elastic prestressed concrete long sleeper structure is composed of prestressed concrete long sleepers, isolation rubber boots on both sides, and vibration damping pads inside the isolation rubber boots. In the traditional central open ditch elastic long sleeper ballast bed structure, a central open ditch with a certain width is set in the center of the ballast bed. Under this kind of ballast bed structure system, the prestressed concrete long sleeper is in contact with the ballast bed by means of isolating rubber boots and vibration damping pads on both sides to support the upper structure and dampen the vibration; the middle part of the prestressed concrete long sleeper is suspended in the air, which can avoid The middle area of ​​the stressed concrete long sleeper bears a large negative bending moment to ensure the structur...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide an elastic long sleeper track bed for urban rail transit to solve the problem of poor flatness and smoothness of the evacuation surface, complex gutter forming templates, smoothness and stability of the track structure Performance is greatly affected by construction factors, the overall strength of the ballast bed structure is weakened, and local running molds affect the vibration damping performance and other technical problems

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