What is the function of the modular multi-group joint expansion device
The modular multi-group joint expansion device is mainly used for structures such as bridges, and its functions are as follows:
1.Adapting to bridge deformation: Bridges will undergo telescopic deformation under the influence of factors such as vehicle loads, temperature changes, and concrete shrinkage and creep. The modular multi-group joint expansion device can, through its own telescopic abili
The modular multi-group joint expansion device is mainly used for structures such as bridges, and its functions are as follows:
1.Adapting to bridge deformation: Bridges will undergo telescopic deformation under the influence of factors such as vehicle loads, temperature changes, and concrete shrinkage and creep. The modular multi-group joint expansion device can, through its own telescopic ability, adapt to these deformations of the bridge to ensure the safety and stability of the bridge structure. For example, when the temperature rises, the bridge structure will expand, and the expansion device will correspondingly elongate to provide space for the expansion of the bridge; conversely, when the temperature drops, the bridge contracts, and the expansion device shortens to avoid tensile stress caused by the contraction of the bridge, which may lead to structural damage.
2.Ensuring smooth driving: The surface of this device is flat, enabling vehicles to pass smoothly through the bridge expansion joints. Through reasonable structural design and installation, it minimizes the impact of the expansion joints on driving, reduces vehicle jolts and impacts, and improves driving comfort and safety. Even when the bridge undergoes relatively large deformations, it can maintain good flatness, providing a continuous and smooth driving surface for vehicles.
3.Waterproofing and drainage: The modular multi-group joint expansion device usually has good waterproof performance, which can effectively prevent rainwater, melted ice and snow water, etc. from penetrating into the interior of the bridge structure, and avoid damage such as corrosion and freeze-thaw to the bridge structure. At the same time, some expansion devices are also designed with a drainage system, which can guide and discharge the infiltrated water, further protecting the bridge structure. For example, during the rainy season, the waterproof layer of the expansion device can prevent rainwater from entering the bridge joints, and the drainage grooves can discharge the small amount of infiltrated rainwater outside the bridge to prevent the adverse effects of water accumulation on the bridge.
4.Transmitting loads: During the driving process of vehicles, the expansion device can effectively transmit the wheel loads to the bridge structure, ensuring the overall stress performance of the bridge. It is closely connected to the bridge structure, making the load evenly distributed and avoiding excessive local stress caused by the existence of the expansion joints, thereby extending the service life of the bridge. For example, when a heavy vehicle passes through the bridge, the expansion device can evenly transmit the weight of the vehicle to the bridge girders and piers, ensuring that all parts of the bridge are reasonably stressed.
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