Vibration device for simulating new and old bridge splicing seam construction

By designing a vibration device to simulate the joint between new and old bridges, the problem that existing equipment cannot simulate the half-width traffic conditions during the construction of the joint between new and old bridges was solved. This enabled the simulation of the concrete setting process under vibration, optimized the concrete mix ratio, and improved the construction quality and structural strength of the wet joint.

CN224203132UActive Publication Date: 2026-05-05CHINA RAILWAY BRIDGE BUREAU OF THE NINTH ENG CO LTD +1
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Patent Information

Application Number
CN202520944389.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-13
Publication Date
2026-05-05
Estimated Expiration
2035-05-13

AI Technical Summary

Technical Problem

Existing testing equipment cannot simulate the working conditions of half-width traffic during the construction of splice joints between new and old bridges, nor can it simulate the setting process of wet joints under vibration. This makes it impossible to optimize the concrete mix ratio, which leads to the wet joints being prone to cracking after setting.

Method used

A vibration device for simulating the construction of splice joints between new and old bridges was designed, including a vibration table, a fixed table, and a specimen mold. By adjusting the vibration frequency and amplitude through the vibration device, the vibration interference of vehicles on the splice joints between new and old bridges is simulated, as well as the concrete setting process.

Benefits of technology

It enabled the simulation of the concrete setting process under vibration, verified the feasibility of the concrete mix design, and improved construction quality and the structural strength of wet joints.

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Abstract

The utility model relates to a vibration device for simulating new and old bridge splicing seam construction, and the device comprises a vibration rack which comprises a pedestal, a vibration table connected to the pedestal through a floating supporting mechanism, and vibration equipment for vibrating the vibration table; the fixed rack is located on one side of the vibration rack, and the top surface of the fixed rack is flush with the top surface of the vibration table; and the test piece mold is positioned at the tops of the vibration table and the fixed rack and is detachably connected with the vibration table and the fixed rack. A test piece mold is fixed to the top of a vibration rack and the top of a fixed rack, one part of the test piece mold is fixed to a vibration table, and the other part of the test piece mold is fixed to the fixed rack. According to the invention, the working condition of vibration interference of a vehicle in a traffic state on a new and old bridge splicing seam is simulated. The concrete test piece in the test piece mold simulates the concrete setting process of a construction site, and the interference condition of vehicle vibration on the concrete strength is obtained, so that the purpose of verifying the feasibility of the concrete mix proportion is achieved.
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