Composite ballast bed with adjustable vibration damping and vibration isolation bandwidth and manufacturing method thereof

Abstract

The invention discloses a vibration absorbing, vibration isolating and bandwidth regulating composite track bed and a making method thereof. The vibration absorbing, vibration isolating and bandwidthregulating composite track bed comprises three layers of structures, wherein the first layer is a common concrete layer, the strength of the first layer is C35-40 MPa, and the thickness of the first layer is h1; the second layer is a light concrete layer, the strength of the second layer is C35-40 MPa, and the thickness of the second layer is h2; the third layer is a common concrete layer, the strength of the third layer is C35-40 MPa, and the thickness of the third layer is h3; the sum of h1, h2 and h3 is 30 cm. Within the total thickness range, the vibration absorbing and vibration isolatingeffects are improved by increasing the thicknesses of the first layer and the second layer and reducing the thickness of the third layer; and the vibration absorbing effect of a made vibration absorbing track bed prefabricated member is 10-16 dB.

Description

technical field [0001] The invention discloses a compound ballast bed for controlling vibration-reducing vibration-isolation bandwidth and a manufacturing method thereof, which realizes regulation and control of subway vibration-reducing vibration-isolation bandwidth through the combination of different structural layers, and overcomes the deficiencies of existing subway vibration-reducing vibration-isolation products . Background technique [0002] With the acceleration of my country's subway construction and the continuous increase of operating mileage, ensuring the safety of subway operation is not only an important livelihood project, but also a strategic project for urban development of green economy, which is related to everyone's travel safety. In fact, many potential safety hazards and hazards have appeared in the operation of subways in some cities, such as shutting down for maintenance after cumulative operation and differential settlements seriously exceeding the ...

AI Technical Summary

Problems solved by technology

No vibration-reducing measures are adopted for the foundation ballast bed in the general section of the subway project, but only vibration-reducing facilities are used in the areas where hospitals, workshops, and government agencies that require vibration reduction are located, such as floating slab ballast bed and elastic short sleeper integral ballast bed Measures such as rails and rubber pads are used to reduce vibration, but these measures are difficult to achieve good vibration reduction and isolation effects. The vibration attenuation is 6-10dB, the service life is limited, and the price is expensive.

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