A Method for Vibration and Noise Control of Subway Tunnel

Abstract

The invention discloses a subway tunnel vibration and noise control method. A subway tunnel monitoring and protecting system used in the method comprises an anti-impact vibration reduction layer I, ananti-impact vibration reduction layer II, a signal collecting, receiving and sending device and a centralized electric control device; the anti-impact vibration reduction layer I comprises a high-damping vibration reduction ring and an adjustable damping vibration reducer I; the anti-impact vibration reduction layer II comprises arc-shaped pipe pieces and adjustable damping vibration reducers IIconnected between every two adjacent arc-shaped pipe pieces; the signal collecting, receiving and sending device comprises a vibration sensor, a noise sensor, a signal collecting, receiving and sending controller, a signal collecting module and a sound wave transmitting module; and the centralized electric control device comprises a central control computer, and the central control computer is electrically connected with the signal collecting, receiving and sending controller, the adjustable damping vibration reducer I and the adjustable damping vibration reducers II. According to the subway tunnel vibration and noise control method, active vibration reduction and noise reduction can be implemented in the subway operation process according to the magnitude of vibration and noise generatedin real time when a train makes contact with a rail, and the method is particularly suitable for subway rail transit.

Description

technical field [0001] The invention relates to a vibration and noise control method, in particular to a vibration and noise control method for underground rail transit tunnels, and belongs to the technical field of underground rail transit. Background technique [0002] The subway is a form of railway transportation, which refers to the urban rail transit system mainly operating underground. With the advantages of saving ground space, reducing air pollution, reducing traffic interference, fast speed, and saving a lot of commuting time, the subway has become a symbol of urban modernization, and the number of subway lines is also one of the important indicators to measure the development of a city. [0003] The current subway tunnel construction usually uses a shield machine. While the shield machine is driving forward to form the tunnel, the assembling machine splices the arched reinforced concrete tunnel segments into an overall annular shield shell at the rear to support t...

AI Technical Summary

Problems solved by technology

After the train enters the station, the load of the train will change due to the loading and unloading of passengers, and the change of the load and speed of the train will affect the amplitude and frequency of the vibration. To a certain extent, the vibration generated during the operation of the train is reduced, but the vibration reduction effect is very limited, and it is difficult to achieve the desired effect

The passive vibration reduction method that cuts off the vibration transmission path requires additional engineering, and usually destroys the integrity of the shield shell, resulting in local strength reduction

[0006] The existing subway noise reduction method usually adopts the method of spraying or pasting the damping material layer (or sound-absorbing material layer) on the tunnel segment (passive noise reduction), although this passive noise reduction method can alleviate the train running process to a certain extent The noise generated, but the noise reduction effect is also very limited, it is difficult to achieve the desired effect

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