Large-diameter cast-in-place concrete pile defect treatment reinforcing structure and construction method

Abstract

The invention relates to a large-diameter cast-in-place concrete pile defect treatment reinforcing structure and a construction method. The large-diameter cast-in-place concrete pile defect treatmentreinforcing structure comprises defective large-diameter cast-in-place concrete piles, the defective large-diameter cast-in-place concrete piles comprise pile body defect sections, pile body punchingexcavation side boundaries and pile body punching excavation bottom boundaries are determined according to design requirements, after pile bodies are punched and excavated, core piles subjected to refilling treatment are arranged, core pile longitudinal bars and core pile stirrups are arranged on the core piles according to design requirements, and high-pressure jet grouting reinforcement sectionsare arranged in a certain range of the periphery of the pile body defect sections to form a waterproof curtain and an enclosure structure. Compared with the prior art, the original pile does not needwaste treatment, the construction period is short, the influence on the overall engineering progress is small, and the treatment cost is controllable; on the basis that an annular reinforced concretestructure outside the original pile body is complete, a core pile processing mode is additionally adopted, the hooping effect can be formed, and the bearing capacity of the pile body is improved; andthe mode of thoroughly chiseling away part of concrete of the defect sections is obvious in treatment effect, and no defect risk is left.

Description

technical field [0001] The invention belongs to the field of construction engineering, and in particular relates to a reinforcement structure and a construction method for defect treatment of large-diameter concrete pouring piles with a pile diameter greater than or equal to 800mm. Background technique [0002] With the rapid development of urban construction, concrete pouring piles are widely used in underground engineering because of their simple construction, controllable cost, and strong geological adaptability. However, due to the characteristics of underground pile formation, if the construction control is slightly negligent, quality defects such as broken piles, mud inclusions, and segregation will easily occur, which will eventually lead to insufficient strength of concrete pouring piles or pile disposal. Therefore, a series of reinforcement measures are required. Reinforcement measures. [0003] At present, the conventional methods for treating the defects of concr...

AI Technical Summary

Problems solved by technology

For large-diameter concrete cast-in-situ piles with a pile diameter greater than or equal to 800mm, if the pressure grouting construction control is not good, the strength is difficult to meet the design bearing capacity requirements of the original pile; The original pile is stressed, which not only greatly increases the cost, but also has a certain impact on the construction period

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