Subway upper cover low-frequency vibration isolation and reduction structure and design method thereof

Abstract

The invention relates to the technical field of vibration and noise control structures, and discloses a subway upper cover low-frequency vibration isolation and reduction structure. The subway upper cover low-frequency vibration isolation and reduction structure comprises a three-dimensional vibration reduction and isolation layer, supporting structures, floor slabs and vertical TMD vibration reduction devices, wherein the plurality of supporting structures are arranged on the three-dimensional vibration reduction and isolation layer, the at least two layers of floor slabs are arranged on the multiple supporting structures at intervals in the vertical direction of the supporting structures and located above the three-dimensional vibration reduction and isolation layer, and the vertical TMD vibration reduction devices are arranged on the floor slabs. According to the subway upper cover low-frequency vibration isolation and reduction structure, the three-dimensional vibration isolation and reduction layer and the vertical TMD vibration reduction devices are combined for application, so that vibration waves of a subway are reduced in a frequency band dividing mode, the vibration waves transmitted to an upper structure are effectively reduced, and a good vibration reduction effect is achieved, thereby effectively reducing vertical vibration of a rail transit upper cover structure, and promoting the development of a rail transit upper cover property.

Description

technical field [0001] The invention relates to the technical field of vibration and noise control structures, in particular to a low-frequency vibration isolation and vibration reduction structure for a subway upper cover and a design method thereof. Background technique [0002] With its convenient and fast travel experience, rail transit has developed rapidly in big cities. The rail transit-oriented TOD property development model has developed rapidly in my country's megacities. The residential property on the track has a very high economic value. When developers vigorously develop the property on the subway, the main technical problem encountered is how to make the superstructure meet the national vibration and noise specification requirements. This technical problem It has become the biggest obstacle to the development of properties above the subway. [0003] The human body is most sensitive to low-frequency vibrations, and it is most difficult to accept the influence...

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Problems solved by technology

[0003]The human body is the most sensitive to low-frequency vibrations, and the most difficult to accept the influence of low-frequency vibrations. Low-frequency vibrations are the most likely to cause discomfort and cause complaints from residents

Moreover, the current national code requires that the limit value for low-frequency vibration is much stricter than that for medium-high frequency vibration. It is difficult to reduce low-frequency vibration and the strict requirements are the main problems encountered in the development of the subway superstructure.

Existing research on the vertical vibration reduction structure of the upper cover of rail transit mainly focuses on three-dimensional vibration isolation and vibration reduction bearings or soil layer vibration reduction measures. Vibration Effective Measures

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