Hengshui Yangtze Prestressed Co., Ltd.

High-quality expansion joints, Hengshui Yangtze River prestressed.. expansion joints [low price]
The main functions and installation methods of bridge expansion joints
1. The process flow of bridge expansion joints is as follows:
Preparatory work before installation rrr Concrete removal rrr Cleaning trough rrr Expansion joint in place rrr Centering and leveling rrr Temporary fixing rrr Inspection rrr Welding rrr One side rrr Adjusting the gap rrr Welding the other side rrr Inspection rrr Cleaning rrr Pouring and tamping rrr Maintenance rrr Release .
2. The detailed operations of the bridge expansion joints are as follows:
Carry out cutting and grooving on the bridge deck. On the original and preset platform pavement layer, reserve positions on each side to ensure the above concrete pouring range. Mark the edge line of its groove. Use a concrete cutting machine to cut the reserved grooves along the line. The cutting seams are required to be neat, straight, and aligned with the original reserved edges. During the cutting process, high-quality expansion joints, Hengshui Yangtze River prestressed... expansion joints [low price] < br/>Prevent contamination of the outer surface layer. Use a pneumatic pick to crush and dig out the concrete material in the trench and clean it. Chill the concrete surface inside the tank. Arrange the embedded steel bars.
, Installation and positioning of expansion joints
Place a square log of about 3, cross-section size every 3~ across the cleaned trough, and hang the expansion joints on it, corresponding to Check whether the position of the embedded steel plate in the trough is appropriate, and make necessary adjustments, and then the small gantry hoist is lifted into place roughly. High-quality expansion joints, Hengshui Yangtze River Prestressed...Expansion joints [low price]
Use a small wire rope to check the centerline position of the expansion joint (it must correspond to the centerline of the bridge end gap). Use 3 rulers to check the longitudinal straightness. There should be no less than two check points along the length of the joint to accurately check whether the top surface of the expansion joint and the road surfaces on both sides are smooth. After using wooden wedges to fix the overall support pad of the expansion joint, it will be inspected and approved by the supervisor.
, Fill the foam board to ensure that the poured concrete will not leak.
When pouring concrete, after cleaning and flushing the slot for the last time, cover the concrete pavement on both sides of the slot with cloth or tarpaulin to prevent concrete from contaminating the road surface or flowing into the joints and control box during construction. The concrete is poured and formed. After the concrete is finally set, the surface of the base is covered with water for curing.
, Sealing tape embedded in expansion joints
, Additional notes: The dimensions of the finished product may be partially adjusted according to the specific requirements of the project and the layout of structural steel bars
Bridge expansion joints
Located in the upper structure of the bridge The end and bridge deck fracture joints 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: first, to transfer vehicle vertical and horizontal loads to the bridge girder through the support structure; second, It is adapted to changes in the longitudinal and lateral
displacement of the bridge and the changes in the angle of beam end warping, to ensure that the upper structure of the bridge changes in temperature, high-quality expansion joints, Hengshui Yangtze River prestressed expansion joints [low price]
Concrete shrinkage and creep, as well as load
Under the action of load, the displacement can be achieved without generating additional additional internal forces, and can ensure smooth driving, with telescopic, load-bearing, and anti-
br/>The water and leveling functions make the bridge run smoothly and expand and contract freely, and its 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.