Technical requirements of bridge expansion joint:
1 the use of rubber (CR, -25, suitable for temperature in -+60 c ) or the use of natural rubber (i.e. NR, suitable for temperature at -40 C -+60 C)
2 steel plate used in the expansion device, quality requirements in line with the provisions of GB374, GB012, the use of profiled steel, (that is, 16MN or Q345) in line with the provisions of JT/T1591.
GQF-C type bridge telescopic device
Type GQF-C bridge expansion device is adapted to a new type of bridge expansion joint of highway bridge construction in our country. The GQF-C device type bridge expansion device adopts whole hot rolled 16Mn shaped steel, overcome the extrusion special-shaped steel straightness and set size uneven, GQF-C type bridge expansion device comprehensive technical performance and technical indicators have reached or exceeded the international advanced level of similar products, structure and special-shaped steel rolling are the first domestic transportation industry will become the standard recommended products.
Type GQF-Z80 bridge expansion device features: low building height, homemade hot rolled profiled steel forming the overall height of only 50mm, has the advantages of simple structure, convenient installation, obvious reliability, comfort and durability. Suitable for pavement thickness is equal to or greater than 80mm and less than or equal to a variety of bridge expansion of 80mm, both for the convenience of the old bridge device replacement, and can be used for the new bridge built in use.
The middle type GQF-C bridge expansion device of rubber sealing strip the technical requirements: the use of chloroprene rubber (CR) sealing expansion device and temperatures for rubber belts for -25 -+60 DEG C area. The use of natural rubber (NR) sealing telescopic rubber belt joint device applicable to the temperature of -40 DEG -+60 DEG area.