GQF-f60 type expansion joint, bridge expansion joint

Expansion joint models
Bridge expansion joint types, -type, -type, -type, -type, are all bridge expansion joint products designed using hot-rolled integrally formed special-shaped steel
Among them, the medium-sized, -type, -type, and -type bridge expansion joints are suitable for bridges with less than the expansion amount. The -type bridge expansion joints are modular bridge expansion joints composed of side beams, middle beams, cross beams and linkage mechanisms. The device is suitable for large and medium-span bridges with a minimum expansion amount
Key points in the design of expansion joints
It is extremely important to reasonably select a gap with an appropriate expansion amount. The larger the gap, the easier it is for the expansion device to be damaged. The gap used is too large or too small, and the gap is adjusted without considering the temperature during installation. Especially for plate-type rubber telescopic devices, it is easy to cause damage. Even with continuous bridge decks, cracks often appear in the surface pavement. therefore. This can be solved by pre-cutting the bridge deck, setting joints, using a softer pavement layer to absorb the cracks, or installing small telescopic devices. In the case of large longitudinal slopes, if no structure is provided to accommodate vertical displacement, defects may easily occur and cause damage. The telescopic device is along the longitudinal direction of the bridge deck. Even if the telescopic amount is small, there is still a problem of large deflection difference. Therefore, attention should be paid to the structure of the telescopic device. The combination of the telescopic device and the beam body to form an equally strong whole is undoubtedly an important means to improve its efficiency. In addition to modular telescopic devices, other types of bridge telescopic devices are often not sufficiently fixed and combined with the bridge deck, and the effect is not ideal. The general structure size is small, the stiffness is insufficient, and the characteristics and coordination of new materials, etc. The research is not in-depth enough, so sufficient comparative research should be done when selecting. In order to prevent leakage caused by rain, although in some steel expansion joint devices, sealing rubber is inserted into the mating parts or the drainage device or pavement layer is used as an easy-to-clean type, or the entire gap is poured and filled. Practical version of waterproof material. For rainwater on the bridge deck, centralized drainage outlets should generally be set up near the telescopic device. For components that are not subject to repeated painting during daily maintenance, high-quality and durable protective materials should be used in the design for effective treatment.