Strip-shaped interface constraint damping track bed for subway vibration and noise reduction

Abstract

The invention relates to a strip-shaped interface constraint damping track bed for subway vibration and noise reduction. The strip-shaped interface constraint damping track bed includes a concrete base layer, a constraint layer and an intermediate layer therebetween; the concrete base layer, the constraint layer and the intermediate layer are all strip-shaped interfaces; the strip-shaped interface is composed of a plurality of parallelly-arranged protruding strip units, wherein strips in two adjacent layers are matched with each other; the intermediate layer is a multi-layer constraint damping layer; and the intermediate layer is composed of a damping material layer I, a hard interlayer and a damping material layer II which are arranged sequentially; the damping material layer I is located at one side which is adjacent to the concrete base layer; and the damping material layer II is located at one side which is adjacent to the constraint layer. According to the strip-shaped interface constraint damping track bed for subway vibration and noise reduction of the invention, the track bed constraint interfaces are designed into strip-shaped structures, and therefore, on the one hand, the hidden hazard of the relative slide of the track bed can be eliminated, and on the other hand, shear area is increased, and therefore, the non-linear characteristic of damping materials can be fully utilized; and by means of the shear energy consumption of the damping materials, a loss factor can be increased by 0.3 to 0.5, and therefore, a vibration effect is also significantly improved.

Description

technical field [0001] The invention belongs to the field of construction and relates to a ballast bed vibration and noise reduction structure and a preparation method thereof, in particular to a strip interface combination structure which is beneficial to vibration and noise reduction. Background technique [0002] In today's society, all kinds of vibrations and noises emerge in endlessly and cannot be avoided. However, the long-term effect of this environment not only affects people's physical and mental health, but also leads to fatigue damage of structural equipment due to long-term vibration, and a decrease in the sensitivity of precision instruments. Therefore, controlling vibration and reducing noise has become an urgent problem to be solved. As an important part of urban rail transit, subway has played an increasingly important role in people's work and life. In order to improve ride comfort and improve the service life of rails and vehicles, more and more new tech...

AI Technical Summary

Problems solved by technology

However, these technologies have the following disadvantages: (1) the loss factor is only about 0.05 to 0.2, and the vibration reduction effect is not obvious; (2) the service life is short; because these devices use materials such as springs and rubber, the volume is relatively small compared to spray-type damping materials. If it is relatively large, after several years of use, the vibration damping effect will be significantly reduced due to the continuous impact of the train and the aging of materials; (3) and the most important point: these technologies will cause slippage and wavy structure of the ballast bed structure. Abrasion, this phenomenon will in turn increase the vibration of the structure, which will have a greater impact on passengers and residents of surrounding buildings, which will cause the subway department to receive complaints from the masses; The track bed caused immeasurable losses to the project

However, there is a huge potential safety hazard in this method, that is, as time goes by, the long-term impact of the train will cause relative slippage of the ballast bed

[0005] At present, epoxy resin is mainly used in the fields of coating protection, adhesives, electronic and electrical materials, engineering plastics, composite materials, civil engineering materials, etc. It has not been applied to the multi-layer constrained damping ballast bed structure for vibration and noise reduction.

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