A method for foundation reinforcement and rectification

Abstract

The invention relates to the technical field of foundation construction, and discloses a method for rectifying deviation of foundation reinforcement, which includes the following steps: implanting anchor rod steel bars around the first pile hole, constructing anchor rod static pressure steel pipe piles, and using the steel pipe piles to repair the deep soil After the grouting is completed, install the pressurized component and temporarily lock the steel pipe pile; open a second pile hole on the foundation ground to be constructed and insert the grouted steel pipe. The grouted steel pipe also uses repeated grouting The local directional reinforcement of the shallow soil is carried out by means of local directional reinforcement, the pressure value of the steel pipe pile is monitored during the grouting process, and the steel pipe pile is gradually repressed through the pressurization component to realize the slow reinforcement and lifting of the subsidence soil layer and the correction of the foundation. This method slowly reinforces and lifts the subsidence soil layer through repeated multiple times of deep and shallow soil mass, multi-point grouting and progressive recompression of steel pipe piles, and directional correction of the foundation, which can effectively reduce or eliminate The uneven settlement and the inclination of the whole building have occurred, and the reinforcement and deviation correction are combined into one.

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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