A method for controlling overfilling concrete at the top of bored piles

Abstract

The invention discloses a method for controlling excessively-poured concrete on the pile top of a cast-in-situ bored pile. The method for controlling excessively-poured concrete on the pile top of the cast-in-situ bored pile comprises the steps that a cast-in-situ bored pile hole is constructed, concrete is poured, and redundant concrete on the pile top is scoured, specifically, in-situ scouring of a drill rod is maintained, and then the drill rod is slowly lifted upwards while the edge is scoured; and finally, the drill rod is completely lifted upwards, and scouring is completed. According to the method for controlling excessively-poured concrete on the pile top of the cast-in-situ bored pile, high-speed slurry is sprayed out horizontally from outlets of connecting ribs and a slurry baffle through the improved drill rod, the excessively-poured concrete on the pile top of the cast-in-situ bored pile is scoured and diluted, and the height of the excessively-poured concrete on the pile top of the cast-in-situ bored pile is effectively controlled, so that the pile with the set pile height is obtained; the workload of chiseling away the redundant concrete on the pile top after a foundation pit is excavated in the later stage is avoided, the construction period is shortened, the cost is greatly reduced, and the economic benefits are improved.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a construction method capable of controlling the height of superfilled concrete at the top of bored piles. Background technique [0002] Bored pile is the most common construction method used in building pile foundation construction. Its main function is to provide vertical load support for the building or use its friction with the soil around the pile to provide anti-buoyancy. [0003] In the construction of bored piles, the general design requires overfilling the length of 1.5-2.0D (D is the pile diameter of the bored pile) to ensure the quality of the concrete at the design pile top elevation, but in actual construction, due to the pile diameter Relatively small, the actual superfill height is far greater than this length. In this way, in the later excavation process of the foundation pit, it is necessary to remove the excess concrete above the design...

AI Technical Summary

Problems solved by technology

[0003] In the construction of bored piles, the general design requires overfilling the length of 1.5-2.0D (D is the pile diameter of the bored pile) to ensure the quality of the concrete at the design pile top elevation, but in actual construction, due to the pile diameter Relatively small, the actual superfill height is far greater than this length. In this way, in the later excavation process of the foundation pit, it is necessary to remove the excess concrete above the design level, which is not only time-consuming, but also requires a lot of money.

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