Hengshui Kaixiang Rubber Products Co., Ltd.

Design of bridge expansion joints: The displacement of the bridge along the center line of the structure, and the expansion joints are obliquely intersecting with them. Calculate △△ according to the formula
This model of expansion joint is applicable. At the same time, it should be noted that the rubber strip is based on the middle part, and the maximum horizontal displacement in both front and rear directions should not be exceeded. If excessive displacement is found during calculation, a larger size expansion joint must be selected. When designing, if there is a sidewalk or anti-collision wall structure
, the design angle and size data must be provided to the factory so that the factory can manufacture it as a whole according to the design requirements.
On-site preparation before installation of single-group bridge expansion joints
Type expansion joints are manufactured and assembled in our factory. If the entire expansion joint is too long to be transported or the project needs to be constructed in sections, it needs to be welded together on site.
Finally, assemble the rubber sealing strip.
Reservation of slots for expansion joints When pouring the beam abutment where expansion joints are to be installed, it is recommended to reserve slots at the ends that meet the installation dimensions
See the table for dimensions. Table unit anchor type notch width b notch depth anchor bolt ∽ anchor ring
∽ special design of anchor plate to be determined
When the pre-embedded steel bars are set in the beam or abutment, pre-set steel bars should be set. Buried steel bars. The depth of pre-embedding shall be no less than 1, and the distance between the structural steel bars connected to the beam abutment shall be consistent with that of the expansion joint anchors.
The gap at the beam end should not be less than the elongation of the beam body, which should be determined by the design engineer based on the local temperature during precast-in-situ or hoisting.
Adjust the expansion joint positioning size and calculate it correctly according to the temperature during installation. After adjustment, tighten the positioning pressure plate.
Use a foamed plastic plate to embed it into the gap at the beam end, and its upper part is closely connected to the inside of the expansion joint steel beam to achieve a seal as much as possible to prevent slurry leakage and voids when pouring concrete

Single-group bridge expansion joint installation
After the expansion joint is hoisted into place, check whether the center line coincides with the center line of the beam joint, whether its top surface is consistent with the road elevation, and make timely
adjustments.
Weld the pre-delivery steel bars and expansion joint anchors firmly, and then cross or horizontal steel bars.
Immediately remove the expansion joint positioning pressure plate, chisel out the positioning screws, use an angle grinding wheel to remove the welding scars, and add paint.
Use adhesive tape or wooden boards to seal the top seam of the expansion joint, and pour concrete No. 1 at the slot. Use an inserted vibrator to fully
vibrate and compact it.
Smooth the surface of the concrete transition section. Use a ruler to check the transition section of the top surface of the expansion joint, which should be as smooth as possible with the road surface. The concrete must be cured
before it can be opened to traffic.
Expansion joints with anti-collision walls and sidewalk structures are involved in the above installation process.
Expansion amount of modular bridge expansion joints
Hengshui Kaixiang Rubber Products Co., Ltd.
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Mobile phone contact Manager Hou< br/> Email@
Address Beitian Village, Pengdu Township, Binhu New District, Hengshui, Hebei Province