The manufacturer of bridge bearing supplier tells you how to extend the service life of bridge bearing replacement

In the daily use of bridges, we often see the following diseases of bridges:

Problems and defects. The defects of bridges in daily use include: according to the difference of bridge structure formation, component type, bridge construction environment, construction quality and use, the defect location, type and degree on the foundation components are also different. For the basic components of the superstructure of concrete highway bridges, the defects usually include concrete cracks, peeling, broken joints, reinforcement leakage and corrosion, insufficient quality of the concrete itself, abnormal deformation, etc., which are manifested as surface cracks, honeycombs, pits, voids, exposed reinforcement, peeling, free lime, gap interlayer, and other phenomena.

For highway concrete bridges, there is a risk of expansion due to the gradual change of certain defects and the impact of the environment. In addition, in concrete highway bridges, defects and causes are not one-to-one correspondence. In many cases, one reason is the inducement, and the other reason is mostly the reason for promoting the development of defects.

Secondly, another disease of the bridge is the bridge structure crack caused by various complex factors. The concrete types of bridge structure cracks are: mesh cracks, lower edge tension zone cracks, web vertical cracks, beam side horizontal cracks, and beam bottom longitudinal cracks.

First, aiming at the defects of the basic components of the superstructure of the concrete highway bridge, such as honeycomb, pitted surface, peeling, etc. During maintenance, the loose parts shall be cleaned first, and then filled with high-grade concrete or cement mortar according to the actual situation.

Secondly, for the phenomenon of steel leakage and peeling off of the protective layer in the beam, we adopt the repair method of chiseling off the loose protective layer, and then removing the inducement on the reinforcement, using the epoxy mortar repair method, but this can only be used to deal with small areas of damage, for large areas of damage, can be repaired by spraying high-grade cement mortar.

When repairing cracks in reinforced concrete simply-supported beams, the pressure grouting method of pouring epoxy resin adhesive shall be used to repair cracks exceeding the limit value; Secondly, when the crack develops extremely serious, the cause should be found out, and then different bridge maintenance and reinforcement measures should be taken according to different situations, and the crack should be observed at any time.