Strip-laying period cushion layer vibration reduction ballast bed

Abstract

The invention discloses a strip-laying periodic cushion layer vibration reduction ballast bed which comprises a periodic composite ballast bed plate and a concrete base arranged below the periodic composite ballast bed plate, and the periodic composite ballast bed plate is formed by alternately arranging and solidifying concrete plates and periodic cushion layers from top to bottom; the periodic cushion layer is composed of at least one long-strip-shaped cushion plate which continuously extends in the driving direction, the width of the cushion plate is smaller than that of a concrete plate, the cushion plate laying range of the cushion layer in the same period does not exceed the concrete plate, and a cushion layer strip laying mode is formed. Projections of the periodic cushion layers located in the interlayers are completely overlapped, the periodic cushion layers of the adjacent layers are aligned in the vertical direction or arranged in a staggered mode in the transverse direction, and a one-dimensional or two-dimensional scattering type periodic structure is formed. The vibration reduction ballast bed can form elastic wave forbidden bands in the vertical direction and the transverse direction, vertical vibration propagation and transverse vibration propagation are effectively controlled, the forbidden band range can be actively adjusted by changing the geometric dimension and material composition of the structure, and adjustability is high.

Description

technical field [0001] The patent of the present invention relates to the field of vibration reduction and noise reduction of rail transit, in particular to a vibration-reduction ballast bed laid with periodic cushion layers. Background technique [0002] At present, the rail vibration reduction measures widely used in the environmental vibration control of rail transit have exposed the following problems: (1) The current principle of rail vibration reduction is to reduce the support stiffness or increase the vibration mass. Excessive vibration reduction or improper vibration reduction may cause wheel-rail abnormalities Wear and tear will cause rapid and abnormal damage to equipment and parts, increase the maintenance and repair workload of the wheel-rail system, and even affect the stability and safety of driving; (2) The vibration reduction section is long and the investment is high. Taking the subway as an example, the cost increase caused by track vibration reduction may...

AI Technical Summary

Problems solved by technology

[0002] At present, the rail vibration reduction measures widely used in the environmental vibration control of rail transit have exposed the following problems: (1) The current principle of rail vibration reduction is to reduce the support stiffness or increase the vibration mass. Excessive vibration reduction or improper vibration reduction may cause wheel-rail abnormalities Wear and tear will cause rapid and abnormal damage to equipment and parts, increase the maintenance and repair workload of the wheel-rail system, and even affect the stability and safety of driving; (2) The vibration reduction section is long and the investment is high. Taking the subway as an example, the cost increase caused by the vibration reduction of the track may reach 200 million yuan; (3) Passengers' riding comfort is seriously damaged in the section paved with steel spring floating slabs

[0004] At present, there is no report on the periodic innovative design of the structure involved in rail transit by using the forbidden band characteristic of the periodic structure to realize the active regulation of vibration

Images