Construction method for integrally lifting and rectifying high-rise building foundation and structure

Abstract

The invention discloses a construction method for integrally lifting and rectifying a foundation and a structure of a high-rise building. The construction method comprises the following steps: 1) determining the number of anchor rod static pressure piles; 2) conducting temporary protection and reinforcement and basement dewatering on existing foundation rafts of the high-rise building to be subjected to inclination rectification; 3) conducting static coring on the existing foundation raft, forming pile pressing holes, embedding counter-force anchor rods, conducting pile sinking construction, and conducting core grouting on the steel pipe after pile sinking construction is conducted; 4) determining the lifting amount; 5) mounting lifting counter-force frame by using the pile repairing counter-force anchor rods; 6) mounting a hydraulic jack between the counter-face frame and the anchor rod static pressure piles; and 7) conducting lifting and rectifying, and conducting grouting, pile intercepting, load holding and pile sealing in a goaf of a substrate after lifting. According to the method, a series of problems in column intercepting jacking inclination rectification in the prior art are solved, the foundation sinking control technology and the inclination rectification technology are integrated, the construction cost is greatly reduced, and the construction period is greatly shortened.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a construction method for lifting and rectifying the foundation and structure of a high-rise building as a whole. Background technique [0002] There are two types of inclination correction methods commonly used in high-rise buildings: the forced landing rectification method and the jacking rectification method of intercepted columns. These two methods have their own advantages and disadvantages. Among them, the forced landing rectification method is less controllable than the jacking rectification method, and the rectification accuracy is low, which has a great impact on the elevation of the building. However, the rectification method of jacking up the truncated column can avoid the above problems, but there are also some disadvantages , such as 1) due to the high center of gravity of high-rise buildings and large horizontal loads, after the vertical me...

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Problems solved by technology

Among them, the forced landing rectification method is less controllable than the jacking rectification method, and the rectification accuracy is low, which has a great impact on the elevation of the building. However, the rectification method of jacking up the truncated column can avoid the above problems, but there are also some disadvantages , such as 1) due to the high center of gravity of high-rise buildings and large horizontal loads, after the vertical members are cut off, the stability of the structure will be adversely affected, and it is easy to cause instability; High safety risk, and at the same time unfavorable for earthquake resistance; 3) A large amount of dismantling of the underpinning system in the later stage will generate a large amount of construction waste, which is not environmentally friendly; 4) Long construction period and high cost

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