Kaixiang explains the welding method of the joints when installing bridge expansion joints

If the bridge expansion joints are installed in sections, the joints must be welded. The welded joints of the section steel have been prepared in the manufacturing factory, and can be installed after the two adjacent seams are aligned. After each beam is welded, anchor it according to the above steps. Install the formwork at the beam end. The formwork should be made according to the external dimensions of the telescopic device and the gap of the reserved slot. The formwork should be made very tight to prevent mortar from flowing into the displacement control box or into the gap at the beam end. After checking that the installed formwork is tight and seamless, clean the reserved groove before pouring concrete and vibrating it tightly. The concrete must be at least as strong as the structural concrete at that location, and bridge expansion joints must be kept clean when pouring concrete.
On-site inspection of bridge expansion joints: After the product arrives at the site, carefully look at the permanent trademark of the product to see if the batch number, production period, manufacturer name, inspector and other information are clearly marked. It is very important to have product inspection reports and certificates of conformity. The appearance of bridge expansion joints must be carefully inspected. Each expansion joint must be divided into at least five sections, and each section must meet the requirements. No matter what kind of expansion joint it is, it must be inspected. For example, modular expansion joints must undergo tension and compression, vertical and horizontal misalignment experiments, and must carefully check friction, uniformity of displacement, and stress and strain values at the links of the supporting beams, etc. Mainly engaged in various bridge expansion joints.
When installing expansion joints, the embedded steel bars in the grooves should be carefully checked before placing the joints. If cracks or breaks are found, the position is improper, or the gaps are too large, remedial measures must be taken. The expansion joints should also be adjusted according to the ambient temperature during installation. spacing between steel beams. The bridge telescopic device should be slowly placed into the slot so that the center line of the seam coincides with the center line of the actual reserved seam, and the deviation must not exceed it. At the same time, the inner edge of the steel edge beam should be kept vertical.
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