1. Top loading

After the jacking machine and equipment check up to standard, the load test can be carried out. When the wholesale mechanical jack is jacked to the wrong bearing beam 2-5mm, it is stopped. After placing 5-10min to carry out research, the overall jacking can be started only after there is no abnormality.

2. Simultaneous jacking

Hydraulic jacking must be carried out with step jacking according to the overall planning of the travel arrangement, the beam lifting rate should be manipulated at 1mm/min, and at the same time observe the relative height of the beam body jacking and the hydraulic jacking force of the hydraulic jacking, and implement the double control switch.

According to the lifting tonnage of the overall planning, the clutch jack is customized to check whether the lifting route is well connected according to the requirements, and then carry out inspection at all stages to ensure the accuracy of the actual operation can be completed.

3. Weighing prestressed tension

Open the switch power box, start the system software gradually bridge jacking, a jacking large displacement set 5mm, when the displacement sensor into the display screen shows that the displacement is 5mm, the system software stop, and through the gasoline pump to the hydraulic 1000 catts top stop to provide oil, At this time should be through the level sensor into the data information of the barometer to distinguish the bearing force of each hydraulic thousand catty top, according to the effect of the record, through the manipulator setting, adjust the displacement value of the hydraulic thousand catty top is not the same. Pretopping is operated by working pressure and displacement, and dominated by working pressure, which is divided into three parts. Multi-function jack customized after each pre-top, to query the sub-support management system of foundation settlement, deformation, the direction of each hydraulic thousand jin top, fixed support, force transmission machinery and equipment fixed immovable and direction to carry out one inquiry, if there is any doubt immediately adjust, and then repeated the actual operation of the last step. Until the rubber bearing can not bear the force, the above structure is located in the floating situation, stop lifting, according to the working pressure is very worthy of the beam practical activity component, and then according to the beam practical activity component to judge the top lift.

Detailed operation process of hydraulic jacks for bridge and step jacking system