What is the main function of the axial multi-directional displacement comb plate expansion device
The axial multi-directional displacement comb plate expansion device mainly has the following functions:
1. Adapt to bridge displacement: Able to adapt to multi-directional displacement of bridges under temperature changes, vehicle loads, wind loads, etc., including longitudinal expansion, lateral displacement, and vertical rotation angles. The multi-directional displacement hinge composed of ste
The axial multi-directional displacement comb plate expansion device mainly has the following functions:
1. Adapt to bridge displacement: Able to adapt to multi-directional displacement of bridges under temperature changes, vehicle loads, wind loads, etc., including longitudinal expansion, lateral displacement, and vertical rotation angles. The multi-directional displacement hinge composed of steel shafts and other components forms a corresponding rotation when the beam body rotates or moves, making the device tightly attached to the beam end, ensuring the stability and safety of the bridge structure under various working conditions.
2. Carrying vehicle loads: Using high-strength materials and reasonable structural design, it has a high bearing capacity. As a component that directly bears vehicle loads, the comb plate can evenly transmit vehicle loads to the bridge structure, reduce local stress concentration, avoid local damage to the bridge, extend the service life of the bridge, and ensure the safe use of the bridge under heavy traffic loads.
3. Ensure driving comfort: The contact surface between the comb teeth is usually treated with special treatment, such as installing rubber pads or using lubricants, which can reduce the noise and vibration generated when the vehicle passes through. At the same time, the design of the comb plate ensures that there is no transitional impact gap when the wheels pass through, making the vehicle travel smoothly and improving driving comfort.
4. Waterproof and dustproof protection for bridges: Generally, there are multiple layers of waterproof layers, such as chloroprene rubber waterproof layers, and waterproof grease is poured into the expansion gap of the comb plate, which can effectively prevent rainwater, debris, etc. from entering the interior of the bridge structure, prevent the steel bars and concrete of the bridge from being corroded, delay the corrosion of the bearings, and protect the bridge structure, thereby extending the service life of the bridge.
5. Automatic slag cleaning function: The expansion gap of the comb teeth is located on the end face of the single-sided beam, and the comb shaped bottom has a stainless steel sliding plate cushion layer. Under the expansion process of the comb shaped steel plate and the action of vehicle driving, ash, hard objects, etc. can be automatically discharged from the expansion gap, which can keep the expansion joint clean, prevent the accumulation of debris from affecting the normal operation of the expansion device, and reduce maintenance workload.
6. Adapt to different types of bridges: It belongs to shallow buried structure, with relatively low requirements for beam structure, and does not require deep grooves to be reserved inside the beam. It can be used for various bridge structures such as concrete beams, steel box beams, and connections between concrete beams and steel box beams. It can be used on both new and old bridges, especially for the replacement of large displacement rubber plate expansion devices on old bridges, with a wide range of applications.
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