The bridge expansion joint is to meet the requirement of bridge deformation, usually between two beam end hinged position between the girder and the abutment or bridge set expansion joints. The expansion joints in parallel, two direction perpendicular to the axis of the bridge, can free expansion, firm and reliable, the vehicle should be smooth running out no, jump and noise; to prevent rainwater and waste soil infiltration obstruction; installation, inspection, maintenance, remove the dirt will be simple and convenient. In the setting of expansion joints, rail and bridge deck pavement are disconnected.
According to the joint performance and installation methods can be divided into: GQF-C type, GQF-Z type, GQF-D type, GQF-F type, GQF-MZL type and GQF-MZL type mode! The number of bridge expansion joint device, is the overall design of special-shaped steel bridge expansion joint device of hot rolling forming. The GQF-C type, GQF-Z type, GQF-D type, GQF-F type expansion joint bridge joint device is suitable for the expansion of the 80mm below the GQF-MZL type, GQF-160 type, GQF-240 type, GQF-320 type expansion joint device is composed of the side beam, inBeam, modular bridge expansion joints composed of crossbeam and linkage device, suitable for large and medium span bridge expansion of 80mm-1200mm.
Technical requirements of bridge expansion device:
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.
Install expansion joint device to meet the river bridge direction and route is not vertical to the anchor bar and the displacement control box oblique arrangement, anchor bar and displacement is expansion modulus telescopic device for various telescopic device and MZL160~1200mm 0~80mm of the control box of the welding in the horizontal tilt shaped side beam the anchor bar, angle and edge beam with the direction of the bridge and tilt of the change