Deviation rectification method for local settlement of pile foundation building

Abstract

The invention relates to a deviation rectification method for local settlement of a pile foundation building. The method comprises the following step: according to the settlement inclination conditionof the building, a jack bearing platform is additionally arranged on a pile with large settlement capacity to serve as a loading platform, a building serves as a counter-force point, a jack is adopted for gradually loading in a graded mode, a pile end is made to be located on a bearing layer by pressing the pile with the self-weight of the building, the later use bearing capacity is met, meanwhile, the jack bearing platform serves as the counter-force point, the building settled due to collapsing is lifted, and the purpose of deviation rectification is achieved. The application of the invention enables the settlement volume and the inclination correction rate to be effectively and safely controlled, the bearing capacity of the pile meets the requirement of safe use after back pressure isfinished, the problems that the settlement amount and the inclination correcting speed are not easy to control, and secondary uneven settlement or re-inclination is easily caused are well solved, andmeanwhile, the problem that secondary damage is caused to an upper structure in the jacking process is also solved. The construction process is simple and convenient, particularly conforms to the force transmission principle, is safe and reliable, and is worthy of wide-range popularization and application.

Description

technical field [0001] The invention relates to the technical field of building deviation correction and reinforcement, in particular to a deviation correction method for local settlement of pile foundation buildings. Background technique [0002] With the continuous development of my country's national economy, the urbanization process in the Northwest collapsible loess area is also accelerating, and the technical level of architectural structure design, construction technology and construction management has also been greatly improved, and more and more of high-rise buildings. As the foundation entity of high-rise buildings in collapsible loess areas, the pile foundation has been widely used in the foundation engineering of high-rise buildings in collapsible loess areas because of its wide range of design options and can adapt to complex geological conditions and buildings of different scales. Applications. [0003] However, due to the particularity of the collapsible loe...

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Problems solved by technology

[0005] Among them, the forced landing rectification method has high requirements on the type of foundation soil and the surrounding environmental conditions of the building, and the settlement amount and rectification rate are not easy to control, which may easily lead to secondary uneven settlement or re-tilt; It is easy to cause secondary damage to the upper structure of the building, and due to the high self-weight of high-rise buildings, improper jacking reaction force will cause accelerated settlement of the foundation, resulting in changes in the bearing capacity of the foundation, thereby inducing secondary settlement and other hazards

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