Synchronous lifting hydraulic system is used for replacing the rubber bearing on site of the basin bearing

The basin bearing is the node connecting the upper and lower structures of the bridge, which has the function of bearing the weight of the top of the bridge and buffering the impact of passing vehicles on the pier. It is made of high-strength rubber. Due to the impact of the field environment, and the use of the bearing The life span will gradually age and damage, which will seriously affect the stress state of the beam and slab, and it needs to be dealt with in time to avoid the occurrence of potential safety hazards.

Large-tonnage electro-hydraulic jacks are used to support the bridge span, 24 jacks are synchronously distributed on the bridge piers, stowage is carried out according to the principle of overall weight balance, and a 24-point synchronous lifting hydraulic system is used to synchronously lift the bridge. Raise the bridge body by 15mm and keep it, leaving a working space, and then replace the rubber bearing. The whole process is carried out under the condition of opening to traffic, and the impact on traffic is minimized, which is safe and reliable.

Build temporary supports and reinforce bridge piers. It is necessary to first calculate the unstructured weight of the bridge deck, middle beam, side beam, guardrail, etc. to ensure the balanced force during the lifting process. Put the jack on the temporary support, and equip the surrounding with sensors, dial indicators, ultra-high pressure oil pipes, and data lines. During the lifting process, the computer controls the lifting pressure and lifting speed of each jack in real time.