The PLC synchronous jacking hydraulic system is mainly used in the research and development area to increase the bottom clearance of the bridge and replace the rubber bearing. We have previously introduced to you two construction methods for bridge headroom to increase synchronous jacking: "Two Ways of Bridge Synchronous Jacking - Broken Column Jacking and Direct Jacking", here we will introduce you to the method of rubber bearing replacement.

First of all, let's talk about the necessity of replacing rubber bearings. Rubber bearings are prone to aging, and they are in a state of overload for a long time, and bridge bearings often suffer from cracking, voiding, and excessive shear deformation. Based on the original design model and material properties, the replacement process uses the overall jacking technology of the beam span. The bridge bearings are erected on the piers, withstand various forces acting on the superstructure, and reliably transmit them to the piers, which play a crucial role in the stability of the bridge structure and the safety of operation.

Some of the beams have a large displacement, and some structural parts of the bridge have diseases, the main diseases are the rust of the bearing steel plate, the crushing of the concrete of the bearing, and the serious misalignment of the bearing, which causes great hidden dangers to the operation safety of the bridge. The safe operation of the bridge must be ensured. Therefore, the competent unit requires that all bearings of the overpass be replaced and the design of the bearings optimized to solve the current problems and eliminate the hidden dangers of the bridge while minimizing the impact on traffic as much as possible.

Since the beam must be jacked when replacing the bearing, the traffic needs to be interrupted for a short time during the replacement period, so the construction is required to be convenient and the construction period is short, and the interference to traffic is reduced as much as possible.

The overall jacking and replacement method of the bridge

Overall jacking replacement method. As the name suggests, the overall jacking method is to lift the bridge deck across the whole span or the whole link, the advantages of this construction method are that the workload is small, the construction time is relatively short, and the impact on traffic is small, but special jacking equipment and facilities are required, and the requirements for the construction plan and construction control are high.

After each section of jacking, stop jacking, and compare the monitoring results with the actual situation, and then enter the next stage of jacking.

Of course, a good way is to need good tools as the premise, PLC synchronous jacking hydraulic system is a market-tested, with mature technology of bridge jacking equipment, Kanent has provided a complete set of solutions and jacking equipment for many years, can ensure the overall jacking safety and synchronous control accuracy of the bridge.

Through the study of this article, we know the necessity of rubber bearing replacement and jacking replacement method, so if you want to know the specific process of bearing replacement, you can click here to view: "PLC synchronous jacking system replacement bridge rubber bearing process"