Bridge noise reduction and seismic resistance method

Abstract

The invention discloses a bridge noise reduction and seismic resistance method. A multidirectional displacement comb plate type telescopic device composed of unit structures is used, each unit structure comprises a fixed tooth plate and a movable tooth plate, and when a bridge structure moves longitudinally, a pressing connection mechanism and a sliding box are arranged on the front portion of each movable tooth plate; the requirement for longitudinal displacement of the telescopic device is met, meanwhile, the stress state of a movable plate tooth end is improved, a lever structure is avoided, and a fixed end bolt stress is reduced; and when transverse displacement or rotation occurs, a special anchoring device and a transverse displacement assembly are arranged on the rear portion of themovable tooth plate, and the requirements for transverse displacement and rotation are met through elasticity and transverse gaps of the pressing blocks.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a bridge noise reduction and anti-seismic method. Background technique [0002] The comb-type plate bridge expansion device currently used in highway bridges is developed on the basis of traditional zigzag expansion joints through improvement. It is a modular structure consisting of several sets of standard modules and accessories. The standard module is mainly composed of movable comb plate (spanning plate), fixed comb plate and multi-directional displacement hinge, and the modules are independent of each other. Accessories include stainless steel slides, rubber waterstops, anchor bolts and other components. The movable comb-tooth plate adopts a spanning type, and is connected to the bridge deck at one end of the bridge with a connecting anchor bolt; the fixed tooth plate is anchored on the bridge surface at the other end, and the bottom is made of a stai...

AI Technical Summary

Problems solved by technology

However, in the long-term practical application, the comb-tooth plate telescopic device generally has problems such as broken teeth, shedding of steel plates, and breakage of anchor bolts.

Analyzing the cause of the disease, the main reason is that the movable plate is fixed on one side, and the movable end is not restrained. During use, a lever structure is formed. Under the impact load of the vehicle, the connecting nut is easily sheared and loosened.

In addition, its lateral and vertical displacement is limited, so it cannot realize real multi-directional displacement, and the elastic support of the lower part of the movable plate is insufficient, resulting in high noise

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