Ballastless track-structured waterproof vibration-reducing flexible protecting structure and paving method thereof

Abstract

The invention discloses a ballastless track-structured waterproof vibration-reducing flexible protecting structure and a paving method thereof. A waterproof linking layer and a buffer protecting layer are paved between the bottom of a ballastless track foundation plate and the top surface of a surface layer/bridge deck slab of a roadbed in a full-width manner. According to the ballastless track-structured waterproof vibration-reducing flexible protecting structure, by virtue of the linking layer and the buffer protecting layer which are paved on the full fracture surface, the overall stereoscopic water proofing and the integrality are realized; by regulating the dynamic modulus, the damping characteristic and the deformation adaptability of an asphalt concrete protecting layer by virtue of a special modifying enhancer, the rigidity matching and buffer vibration reducing functions are realized; and by enhancing the load diffusivity, the fatigue durability and the water damage resistance of asphalt concrete by virtue of the special modifying enhancer, the problems of premature failure, interlayer slurry extruding, disengaging, even frost heaving and the like of waterproof layers of existing ballastless track roadbeds are effectively solved, the integrality, the smoothness, the uniformity and the long-term stability of a lower base structure of a track are improved, and good and stable support is provided for a ballastless track plate, so that the fatigue life of the track plate is prolonged. The ballastless track-structured waterproof vibration-reducing flexible protecting structure is a long-lasting protection scheme.

Description

technical field [0001] The invention relates to a waterproof sealing layer of a new railway ballastless track, in particular to a waterproof and vibration-reducing ballastless track subgrade flexible protection structure and a laying method. Background technique [0002] In recent years, my country's high-speed railway has developed rapidly. As the foundation of the railway track, the roadbed's smoothness, uniformity and long-term stability are crucial to ensure the safe operation of high-speed trains. The existing high-speed railway ballastless track structure is as follows from top to bottom: ballastless track slab, base plate (reinforced concrete), subgrade surface (permeable graded crushed stone), subgrade bottom layer and subgrade soil; For the road shoulder part, a waterproof sealing layer is set to protect the subgrade. Practice has shown that the waterproof sealing layer is an important barrier to prevent rainfall and surface water from entering the road base, and i...

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: The present invention provides a flexible protection structure and laying method for waterproof and vibration reduction of ballastless track, which is suitable for waterproof sealing of subgrade sections or bridge sections of ballastless track of high-speed railways or passenger dedicated lines, and can effectively solve the problem of no existing high-speed railways. Problems such as premature failure and failure of the waterproof layer of the ballast track subgrade, scour slurry between layers of the bridge section, etc., provide comprehensive long-term protection for the substructure, provide appropriate buffering and vibration reduction functions for the ballastless track slab, and improve the integrity of the structure under the track. Smoothness, uniformity and long-term stability, with the advantages of simple construction and maintenance-free, it is a long-term ballastless track protection layer

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