Bridge expansion joints installed to accommodate the river route is not perpendicular to the direction of the bridge required, the anchor bars and displacement control box diagonally arranged for a variety of upcoming expansion volume 0 ~ 80mm telescopic device and MZL160 ~ 1200mm modulus telescopic anchor bars and the horizontal displacement device tilt control box shaped edge welded beam, its anchor bars and side beams and tilt angle with the direction of the bridge and the degree of change in purchase to store different types made in accordance with design drawings, length, sealing rubber parts type and installation requirements, such as the width of the telescopic device purchase and assembly, different brands and models of telescopic device by specialized manufacturer of complete sets of supply. Bridge expansion joint telescopic device manufacturers assembled in advance by specialized equipment package after delivery site. Telescopic device assembled in the factory, according to the manufacturer's installation dimensions drawings, fixed with clamps in order to maintain the required width and drawings were marked weight lifting point. If the transport length limits or for other reasons too long by modular telescopic device, approved by the supervising engineer, factory test after assembly, assembly, transportation can be segmented, but modulus telescopic device must be assembled at the factory. Expansion joint material used in this sub-project approach according to plan, both pads set telescopic device is stored when transported to the site from the ground at least 30cm height and color of the cloth cover with a good, make sure it is not damaged, meet operating requirements. 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 c, construction methods ① clean up a notch, 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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