Ordering E-type 80 expansion joints <Hengshui Yangtze Prestressed> expansion joints welcome your consultation!

Order-type expansion joints Hengshui Yangtze River prestressed expansion joints welcome your consultation!
Bridge expansion joints
Located at the movable end of the bridge superstructure and at the bridge deck fracture, they are mainly composed of a force transmission support system and a displacement control system. The main functions of special-shaped steel bridge expansion joints are: The vertical and horizontal loads of vehicles are transferred to the bridge girder through the supporting structure. The second is to adapt to the changes in longitudinal and lateral displacement of the bridge and the angle changes caused by the warping of the beam end, so as to ensure that the upper structure of the bridge is in good condition during temperature changes and concrete changes. Shrinkage and creep, as well as
under the action of load, the displacement here can be realized without generating additional additional internal forces, and can ensure smooth driving, with telescopic, load-bearing, waterproof
Leveling and other functions make the bridge run smoothly and expand and contract freely. Order-type expansion joints and Hengshui Yangtze River prestressed expansion joints welcome your consultation!
Their quality directly affects the overall performance and life of the bridge. According to
the displacement of the bridge, single-slit, double-slit or multi-slit special-shaped steel bridges can be used.
Installation method of bridge expansion joints
1. Bridge deck cutting joints When the bridge deck asphalt concrete pavement is completed and accepted, we can according to
Expansion joints
The requirements of the construction drawings are determined
Determine the slot width, accurately lay out, and use a cutting machine to saw the seams and straighten them after laying the lines. Order-type expansion joints. Hengshui Yangtze River Prestressed Expansion Joints welcome your consultation!
The asphalt concrete pavement outside the sawing line must be carefully covered with plastic sheet
and sealed with tape to prevent the stone powder produced during sawing from contaminating the road surface.
2. Grooving of the bridge: The construction unit uses a pneumatic pick to groove, and the depth of the groove shall not be less than
. The asphalt concrete and loose cement
concrete in the groove should be chiseled out. It should be chiseled to a hard layer, and dust and debris should be removed with a powerful hair dryer or high-pressure water gun.
3. Positioning of the steel bars on the bridge: Before we install the expansion joints, the expansion amount must be calculated based on the on-site temperature

**, position the plate body, and implant the steel bars on the top surface of the beam body For the following
bolt connection
, use high-quality welding rods to weld the positioning steel bars and expansion joint screws firmly.
4. About template installation. Order-type expansion joints Hengshui Yangtze River prestressed expansion joints welcome your consultation!
For bridge formwork using fiberboard, the formwork should be strong and tight so that it does not move when the concrete is vibrated, and can prevent mortar from flowing into the expansion joints to avoid affecting expansion. Reinforcement mesh should be installed on both sides, and the top of the ribbed steel mesh should be lower than the road elevation
3. Set up ribbed steel mesh and anti-crack steel mesh.
5. Concrete pouring and maintenance
Before pouring, plastic sheets should be laid on both sides of the joint to ensure that the concrete does not pollute the road surface.
When vibrating concrete, it should be done on both sides at the same time. In order to ensure that the concrete is dense, use a vibrator to vibrate until there are no more bubbles.
After the concrete is vibrated and compacted, use a trowel to rub out the cement slurry, and apply it in regular steps until it is smooth. Special attention should be paid to the flatness in this process. It is advisable that the concrete surface is slightly lower than the top surface of the asphalt pavement. Too high or too low will cause the car to jump.
After the cement concrete pouring is completed, it is then covered with sacks or grass thatch, and it is strictly sprinkled with water to maintain its health. The curing period shall not be less than a few days. Vehicles are strictly prohibited during the health care period.