Joints, Sheng rubber, factory outlets, modern design and reasonable price, durable joints inquiry hotline 15132847000 structural requirements (1) in parallel, perpendicular to the axis of the bridge in both directions can freely scalable (2) a solid and reliable (3) passing vehicle should smoothly, without sudden jump and noise (4) water and to prevent debris blocking infiltration (5) installation, inspection, maintenance, expansion joints to eliminate dirt should be simple and convenient to install a secure, we require the construction unit will joints hoisting, check whether the center line coincides with the beam centerline seam, the top surface and the road surface elevation is consistent, timely adjustments. The pre-delivery rebar and anchor firmly welded joints, and then across the 12 or 16 level bars. Expansion joints must be dismantled immediately positioning plate, engraved to locate the screw, and rubbed off the wheel burr horn, make up paint. Sealed with adhesive tape or wood joints the top slot in the notch portion 50 of the pouring of concrete; with the plug-in vibrator, vibrator fully dense. Smooth over the surface of the concrete section. Check the top surface with a ruler joints, excessive segment, should be smooth and the road. Only well after the opening of the concrete health. With anti-wall, sidewalk construction joints, the Senate made the mounting process operation. 2, the installation of [2] shall check whether the expansion joints with a factory certificate, manual, etc., and invite supervision, design and appearance of the officer on the joints, geometric precision inspection and acceptance, after passing before use. Scribed on the bridge, cutting: according to the location of the release of the expansion joint design center line, according to the design dimensions measured from the centerline position joints with concrete protection sideline, concrete cutting sewing machine according to the draw bridge asphalt concrete cutting edges. To ensure the trimming is not damaged, it can be divided into two cuts. The first slit edges aside from the protection zone 5cm, pending before pouring concrete, and then along a second cutting edges accurately. Slit requirements straight, accurate, careful not to damage the bridge deck waterproofing layer to protect the waterproof layer roll when cut. 3, be sure to promptly clean up the deck, filling the gap: artificial air compressor to clear cutting of asphalt concrete within the range, and chiseled loose concrete, and will clean up debris inside seam. Aperture width must meet the design requirements, after cleaning up the joints with benzene board blocking strict. Recovery embedded Anchorage, reserved number of bars to be consistent with the design drawings, not according to timely repair welding. Air compressor to clean up again. To prevent solder joints during installation flower burn foam board, foam board can be covered and protected on both sides with steel or iron. 4. When you want to install expansion joints in place with a crane lifting, you should check good crane hook, to prevent decoupling, should be in strict accordance with the manufacturer reserved hoisting crane lifting bits and tie rolled steel in accordance with the design drawings. In the fixed process used method of controlling the cable straight along the middle and degree of telescopic device, with a length greater than 3m beam or aluminum alloy steel having sufficient rigidity to control the ride height on both sides of the expansion joints. I-beam in the vertical direction at 1m spacing joints placed and pressed on both sides of the road with the seam, the joints with a wedge-shaped steel pad level, and then use the 3m ruler wicket stand with homemade piecewise precise leveling, adjusting level process should be made of steel wedges. After the expansion joints in place, it should be adjusted to the center line and elevation joints, according to the actual road surface elevation level on both sides of the seam is determined 5m range. Model joints expansion joints in accordance with performance and installation methods can be divided into: GQF-C type, GQF-Z type, GQF-L type, GQF-F type. Which GQF-MZL number of model type bridge expansion joint device is the use of hot-rolled steel bridge expansion joint device shaped the overall shape of the design; GQF-C type, GQF-Z type, GQF-L type, GQF-F-type expansion joint device for stretching the amount of 80mm below the bridge joints; GQF-MZL type, GQF-160 type, GQF-240 type, GQF-320-type expansion joints and other means is by the side beams, beams, beams and linked institutions of Modular bridge expansion joint device for stretching the amount of 80mm-1200mm of large and medium span bridges. Reason 1 damaged joints, expansion joints ill-designed beam end design failed to consider carefully, in repeated loads, beam end damage caused by the telescopic device failure. Moreover, sometimes deformation amount calculating inappropriate, excessive use of telescopic pitch, resulting in breakage of the telescopic device. 2, the expansion joint device itself insufficient member strength problems telescopic device itself insufficient stiffness of the anchor structure, resulting in varying degrees of damage in their operations. 3, after pouring pressure telescopic device fill material inappropriate choice of telescopic device after pouring pressure filling material is not taken seriously, carefully selected, resulting in lower quality telescopic device operations, resulting in varying degrees of disease. 4, the construction process of scientific and reasonable construction, beam end joints distance is not completed according to design requirements, artificially zoom in and out, positioning angle position is incorrect, resulting in the telescopic device is not working properly. It will appear the following conditions: As from the small seam, rubber expansion joints arising due to overrun crush lobe jumping; the seam away from excessive shear loads and driving under the vehicle inertia, will loose rubber expansion joints with a positioning angle, producing another type of jumping. Telescopic device anchoring steel welded construction is not strong enough, or produce the phenomenon of missing embedded anchor bars to the expansion joint itself cause problems; well, after pouring a bad bridge deck expansion joint telescopic device is installed during the construction, use, under cyclic loads causing damage to joints. 5, continuous seam set inadequate expansion joints in order to reduce a large number of continuous beam or continuous deck. Continuous deck on the need to set up a continuous seam, continuous seam setup is not perfect, resulting in continuous seam damage, and produce bridge jumping. Continuous deck joints, width and depth of the deformation fake joints set not standardized, not unified, which to varying degrees affect the normal operation of a continuous seam. Joints Note 1, the length of the telescopic device due to transportation restrictions, can be segmented manufacturing, field splicing. Stored at the site of the telescopic device should be placed in parallel, not cross stacking to prevent deformation. 2, the factory, the connection is only easy to transport and set up the jig, the gap is not a given location. When the telescopic device installation, should only be carried out under the supervision of engineers recognized. As specified on the design documents to file under the bridge design is based. 3, before hoisting the telescopic device, concrete tank should be set aside to fight hair, cleaned. When the value of a telescopic device installation width along the bridge to the deal said on gap expansion joints, and its top surface elevation and design elevation anastomosis pad level, and then put through a coupling level value to steel, telescopic device The anchor bars and weld steel beams embedded on both sides (try to increase the weld and weld length, to extend the life telescopic device), relax fixtures, its free stretch, then telescopic device into operation. 4. After completing the above steps, installing the necessary template to prevent the inflow of mortar joints, and then carefully washed with water. Reserved slots in the concrete pouring of more than concrete C50. Pouring concrete should take the necessary measures, vibrating compaction. 5, after the initial setting of concrete, unplug the template, the timely removal of expansion joints and shaped steel tape loading slot foreign body. Expansion joints Type 1, galvanized sheet steel joints. This is an easy on joints, fabricated in the small span girders bridge, when the beam deformation often chosen within 20-40mm. 2, steel expansion joints. Steel expansion joints made of steel production, it can be directly subjected to vehicle load and size of the amount under the flexibility to adjust the thickness of steel plate, steel expansion joints are also appropriate for the bridge of the trial. Its structure is more complex, only on a larger temperature difference between regions or large span bridge was adopted. When the span is large, on the one hand to thick steel plate, and the need to adopt more sophisticated comb plate joints. 3, rubber expansion joints. It is a rubber band as a cross stitch material. This expansion joint structure is simple, easy to use, the effect is. A large amount of deformation in the larger span bridge, you can use a combination of rubber and steel joints.