Bridge expansion joints: refers to the deformation of the bridge to meet the requirements, usually between two end of the beam, or set the position articulated joints on the bridge between the end of the beam and the abutment. Require expansion joints in parallel, perpendicular to the axis of the bridge in both directions, can freely scalable, secure and reliable vehicle should be smooth too, no sudden jump and noise; to be able to prevent the infiltration of rainwater and garbage soil obstruction; installation, inspection, maintenance eliminate the dirt to be simple and easy to use. Set expansion joints, railings and the bridge deck to be disconnected. A large amount of displacement of bridge expansion joints is the rise in recent years a new type of bridge expansion. It is mainly applicable to the construction of high-grade highways and bridges. Hengshui Rubber Co. Guangrun large amount of displacement Central girder bridge expansion joint products and two sides of the same shape and rubber sealing tape consisting of beam; Central column and roof beams welded; edge beam from the top of the chassis and the hook welded together. Columns and beams in the roof, and the chassis side beams and hook the top to form a small opening in a wide arc chamber. Column, cover and chassis side beams in the beam, hook the top are special rolled steel. This means high strength, flexibility, and long life, and the vehicle on the comfort and safety. We know: Large amount of displacement-type bridge expansion joints anchoring a direct impact on the life of the joints. Anchoring the metal plate mainly from the transfer force. After anchoring device fatigue test beam welded directly to side. At the same time, side beams and bridge superstructure rigidly connected to ensure a large displacement of the XF-type bridge expansion joints carry the maximum traffic load. In the long-term dynamic traffic load carrying case, other methods joints with screws or bolts connecting the upper structure of the bridge is not feasible. XF large amount of displacement-type bridge expansion joints in this area has been one step ahead of the design, the bearing and water to separate the two functions, one by one handle, which is more conducive to the strengthening and improvement of the two functions. How large amount of displacement-type bridge expansion joints to prevent the deal, one feature of which is the neoprene seal effectively embedded in the groove edge beam can ensure complete waterproofing. At the same time, as long as a simple tool can be on deck to replace or repair them by vulcanization. Under the protection of the edge of the beam, the seal is not subject to direct rolling wheels, and the "V" type structure can play a clear role in the sediment itself. Seal both tensile strength, but also the lateral and vertical displacement. In contrast, XF large amount of displacement-type bridge expansion joints leak to the bridge structure will cause some damage. Bridge expansion joint installation a, installation, determine the actual temperature of the installation width value. b, expansion joint installation process, you must use the expansion joint device neatly arranged, to maintain a certain inclination. Telescopic device to ensure the highest plane and finished flush with the deck. Bridge expansion joints ① clean up a notch construction methods, so as to achieve the design width and depth of the buried tank removal and displacement have reinforced interference reserve pit openings must be greater than the width of the expansion joints installed. ② Check whether the beam between the gap in line with telescopic device installation temperature requirements, otherwise, the application level jacks, adjust the clamp until it meets the design requirements, adjusted immediately after the placement of special fixtures. ③ joints central location settings lifting device, the telescopic device security within the notch and retractable top and deck elevation of the same device. Also note that slope aspect should also be consistent with the deck. ④ After hanging into the reserve tank telescopic device, which should be the end of the beam centerline centerline space reserved on the positive, the length and width of the bridge being. ⑤ on the telescopic device to adjust the line segment, and each stringer gap uniform. ⑥ telescopic device again in the box or anchor plate at vertical welding Ф16 more highly locate rebar, steel bar width horizontal welding Ф16 positioning. After anchoring ⑦ telescopic device is properly seated, would be able to anchor bars and reserved slots reserved telescopic device side welded steel telescopic device to ensure that the fixed line and leveling, as long as every two to three anchoring tendons welding a welding you can, and then press the steps above welding anchor tendons on the other side. After the two sides reached a fixed, you can rest welded anchor tendons then welded to ensure reliable anchor. When welding anchor tendons do not pay attention to the side beams and the beam welding any construction to prevent deformation of twisted steel beams. ⑧ telescopic device if the sub is installed, the seams must be welded, soldered by professionals, each beam welding is completed, then the anchor ⑦ steps. ⑨ According to sew reserved slot dimensions and production templates, the template should be put away after blocking tight to prevent water flowing into the displacement slurry tank, expansion joints stamped on board the plane, to prevent falling into the rubber seal with mortar, in the inspection apparatus After flatness is correct and neutral position, and are in line with the requirements of the gap before poured concrete, and concrete vibrators fully compacted, with particular attention to the displacement of the pit box and set aside the base surface can not leave empty. Concrete curing retreat to be fixed card templates and expansion joints on the go. ⑩ before concrete expansion joints does not reach 80% of the strength, expansion joints can withstand external loads. 

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