Foundation reinforcing and deviation rectifying method

Abstract

The invention relates to the technical field of foundation construction, and discloses a foundation reinforcing and deviation rectifying method. The method comprises the following steps that anchor rod steel bars are implanted around a first pile hole, an anchor rod static pressure steel pipe pile is constructed, a deep soil body is repeatedly subjected to extruding and grouting through the steelpipe pile, and after grouting is completed, a pressurizing assembly is installed and the steel pipe pile is temporarily locked; and a second pile hole is formed in a foundation ground to be constructed, a grouting steel pipe is inserted into the second pile hole, the grouting steel pipe conducts local directional reinforcing on a shallow soil body in a repeated grouting mode as well, a pressure value of the steel pipe pile is monitored in the grouting process, and gradual re-pressing is conducted on the steel pipe pile through the pressurizing assembly, so that slow reinforcing and lifting ofa settled soil layer and deviation rectifying of a foundation are achieved. According to the method, through repeated multi-time multi-point grouting of the deep soil body and the shallow soil body and gradual re-pressing of the steel pipe pile, the settled soil layer is slowly reinforced and lifted, directional deviation rectifying is conducted on the foundation, uneven settlement and overall building inclination that have occurred can be effectively reduced or eliminated, and reinforcing and deviation rectifying are combined.

Description

technical field [0001] The invention relates to the technical field of foundation construction, in particular to a foundation reinforcement and deviation correction method. Background technique [0002] At present, there are many ways to strengthen the foundation of buildings, including pile foundation underpinning method, tree root pile method, base grouting method, etc., and mature design and construction methods have been formed, but the above methods can only strengthen the strength and rigidity of the foundation. Controlling the settlement after foundation construction cannot effectively reduce the difference in settlement between piles, and can not make directional and reasonable corrections to the overall or partial inclination of the building that has occurred, so that it can be restored to its original position and meet the requirements of national standards. Especially when limited by the conditions of the construction site and the weak strength of the original fou...

AI Technical Summary

Problems solved by technology

[0002] At present, there are many ways to strengthen the foundation of buildings, including pile foundation underpinning method, tree root pile method, base grouting method, etc., and mature design and construction methods have been formed, but the above methods can only strengthen the strength and rigidity of the foundation. Controlling the settlement after foundation construction cannot effectively reduce the difference in settlement between piles, and can not make directional and reasonable corrections to the overall or partial inclination of the building that has occurred, so that it can be reset to the original position and meet the requirements of national standards

Especially when limited by the conditions of the construction site and the weak strength of the original foundation, or when the bearing capacity of the bottom soil layer of the natural foundation is low, the reinforcement effect is often difficult to achieve the expected goal, such as using large-diameter hole-forming piles or manual excavation. There are still certain safety risks in the construction of hole piles. Construction next to the old foundation is likely to further disturb the base soil and aggravate the settlement of the foundation.

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