Curved surface shock absorption and noise reduction telescopic device for highway bridge

Abstract

The invention discloses a curved surface shock absorption and noise reduction telescopic device for a highway bridge. The device comprises beam bodies on the two sides, and a preformed groove is formed between the beam bodies on the two sides. Curved surface noise reduction plates which are located on the two sides and coupled are arranged in the preformed groove, and a noise reduction and telescopic gap is reserved between the corresponding curved surface noise reduction plates on the two sides. Special-shaped steel grooves corresponding to the curved surface noise reduction gaps in positionare correspondingly formed in the inner sides of the lower portions of the noise reduction plates on the two sides, and corresponding push-pull body mounting grooves are formed in the lower ends of the special-shaped steel sections on the two sides. The device is provided with a unique curve design. The automobile tire contact width and the wheel track are studied, the curved surface wavelength isdetermined through tests, tires are prevented from impacting seams of the telescopic device at the same time, and an optimal vibration reduction effect is achieved. The tires make contact in an asymptotic mode when passing through the seams, supporting points always exist between the tires and the road surface, transition is smooth, the stress area is increased, impact kinetic energy of the vehicle tires is effectively absorbed, and through tests, noise can be reduced by 7 decibels or above.

Description

technical field [0001] The invention relates to the technical equipment field of road bridge expansion joints, in particular to a curved shock-absorbing and noise-reducing telescopic device for road bridges. Background technique [0002] The expansion device of the highway bridge is an important component of the bridge, which plays an important role in the normal operation of the bridge and the safety and comfort of driving. With the continuous and rapid development of my country's economy, in order to improve urban transportation and promote regional economic development, many places have built and are planning more urban expressways. Most of these expressways are mainly municipal viaducts, and most of them are urban residents Agglomeration areas pass through. Considering the environmental protection and noise reduction needs of the residents along the line, a safe and reliable noise-reducing bridge expansion device with obvious noise reduction effect has been developed and...

AI Technical Summary

Problems solved by technology

[0004] The "General Technical Conditions for Highway Bridge Expansion Devices" (JT / T 327-2016) promulgated and implemented in 2016 defines three types of expansion devices, namely modular type, comb-tooth plate type, and seamless type. Noise-type telescopic devices, there are no specific requirements for the environmental protection and noise reduction performance of the above three types of telescopic devices

[0007] (3) Seamless telescopic device: basically use elastomer or rubber composite material, the stiffness is small, the effect of noise reduction is relatively good, but the scope of application is small, generally used for bridges with expansion and contraction less than 40mm, and in high speed or The durability problem is prominent under the condition of heavy traffic on the main road of the city

[0008] The various types of expansion devices used in China above have their own advantages and disadvantages, but generally speaking, in the construction of highway bridges and urban elevated roads, the noise reduction functions and effects of various types of expansion devices are more or less ineffective. Therefore, it is necessary to research and develop a kind of noise reduction and vibration reduction telescopic device with excellent performance to reduce the pollution of bridge telescopic device noise to the environment

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