Underground structure for active shock absorption

An underground structure and active shock absorption technology, which is applied in infrastructure engineering, roads, tracks, etc., can solve the problems of insignificant shock isolation effect, low vibration frequency, poor selectivity, etc., and achieves convenient manufacture and adjustable control force , the effect of small friction

Pending Publication Date: 2019-04-19
AVIC GEOTECHN ENG INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is a kind of passive isolation. The vibration frequency generated by passive isolation components is usually relatively low a

Method used

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  • Underground structure for active shock absorption

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Example Embodiment

[0018] The present invention will be further described below in conjunction with the embodiments and the drawings.

[0019] See attached figure 1 As shown, taking the underground subway as an example, the buried depth of the subway is 50 meters, and the neighborhood 50 meters away is a residential area. The residential area is 50 meters long on the side near the subway. The residential building is a box foundation and the foundation is buried at a depth of 15 meters. When the structure of the present invention is adopted, a retaining wall 1 is arranged underground between the underground track and the residential area at a horizontal distance of 5 meters from the buildings in the residential area. The retaining wall 1 adopts a concrete retaining wall with a length of 50 meters and a height of 50 meters. 10 meters, 1 meter thick, and 20 meters deep. While the retaining wall 1 is being built, vibration sensors 3 are arranged in front of the retaining wall 1 near the subway side, a...

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Abstract

The invention discloses an underground structure for active shock absorption. The structure comprises a retaining wall (1). The retaining wall (1) is installed between a vibration source and a vibration isolating area. The back face of the retaining wall (1) is provided with a vibrating motor (2). A vibrating body of the vibrating motor (2) tightly contacts with the retaining wall (1). In front ofthe retaining wall (1), a vibration sensor (3) is installed towards the vibration source. The vibration sensor (3) can actively respond a shock wave transmitted from the vibration source through underground rock or soil, and convert frequency and amplitude of the measured shock wave into an electric signal which is transmitted to a feedback control circuit (4) through an electric cable (5). A control signal is generated after the electric signal is processed by the feedback control circuit (4), and the control signal is transmitted to the vibrating motor (2) through the electric cable (5), sothe vibrating motor (2) generates vibration of which frequency is the same as the frequency of the shock wave and amplitude is opposite to the amplitude of the shock wave, at the same time, the retaining wall (1) transmits the vibration of the vibrating motor (2) towards a direction of the vibration source.

Description

technical field [0001] The invention relates to an underground structure for active shock absorption, which belongs to the technical field of fixed buildings. Background technique [0002] With the development of urban rail transit, the vibration and noise problems caused by train operation have attracted more and more attention. The train generates random vibration during operation, and the vibration is transmitted to the ground or other structures through track foundations, tunnels, soil media, underground or above-ground structures, etc., causing structural vibration or secondary vibration noise, which affects the surrounding environment. [0003] In engineering, seismic isolation trenches and isolation walls are usually set up around the foundation to reduce the impact of vibration on the surroundings. Hollow structures or cushion sponges, latex and other materials are often used for isolation in isolation trenches. Foam plastics, Polystyrene and other shock-absorbing m...

Claims

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Application Information

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IPC IPC(8): E02D31/08E01B19/00E01B2/00
CPCE01B2/003E01B19/003E02D31/08
Inventor 王笃礼王小波
Owner AVIC GEOTECHN ENG INST
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