The commonly used method of correcting deviations in high-rise buildings is to jack the foundation superstructure on the side with large settlement to make it vertically meet the design requirements. The specific method is to set up a platform at the bottom of the frame column or shear wall, put a hydraulic jack between the platform and the foundation, cut off the bottom of the frame column or shear wall on the foundation surface, and use the PLC synchronous jacking system to control the hydraulic jack jacking, so that the building reaches the verticality, and then connect the structural void after jacking with a reinforced concrete structure. Regarding the jacking and correction method of buildings, we will introduce you to the "Building Correction and Righteation Hydraulic Jack Jacking Correction Method" in this article.

High-rise building correction: cut off the bottom of the frame and place a hydraulic jack

Jacking process of PLC synchronous jacking system:

Construction preparation before jacking:

The new anchor hydrostatic steel pipe pile is used for the overall jacking construction of the foundation and superstructure.

Arrange hydraulic jacks, and the specific number is calculated according to the force of the foundation to meet the requirements of jacking and correction.

Establish a safety and technical headquarters; Confirm the load and jacking amount of each jacking point; debugging the jacking machinery; Conduct safety technical disclosure for jacking technicians and workers.

Test top:

Before the official jacking, in order to test the working performance of the jacking device, check the working performance of the jack, determine the distance and time required to complete each stage of jacking, be familiar with the synchronous operation of the jacking jack, coordinate the unified actions of each operation team and other operational details, to ensure that the jacking is foolproof, it is necessary to carry out the test lifting first.

Official jacking:

Step by step jacking, tightening the check bolt, adjusting, and jacking the main engine... Jack up to the design elevation, tighten the check bolt, pour M5.0 self-leveling mortar into the void below the foundation, pressure seal the pile, and remove the jack after the pile sealing structure meets the design requirements.

When jacking, the jacking amount of each point is proportional in a linear manner according to the distance from the jacking point to the axis of rotation. Each stage is jacked by 1mm, and the jacking amount of each jacking point is reviewed when it is lifted by 3mm, and corrected in time.

PLC synchronous jacking system

PLC synchronous jacking system introduction:

PLC synchronous jacking system is composed of hydraulic pumping station, hydraulic jack, sensor, computer control system and other parts.

The system uses a frequency conversion governor to control the oil pump motor, relying on adjusting the frequency of power supply to change the motor speed, so as to achieve the purpose of continuously adjusting the flow rate of the oil pump, with appropriate electronic control and detection system, the lifting speed of the jack can be accurately controlled, and the jack synchronous control can be realized. The displacement synchronization accuracy ≤± 0.2mm. Display mode HMI. Control points 2 points, 4 points, 6 points, 8 points. More point operations can be expanded online.

PLC synchronous jacking system has been used more and more for jacking correction of high-rise buildings, what should we pay attention to in operation? will be introduced in this article: "Precautions for PLC Synchronous Jacking and Correction"

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