Concrete pile head breaking device and using method thereof

Abstract

The invention discloses a concrete pile head breaking device and method.The concrete pile head breaking device comprises a steel bar inner ring necking structure, a steel bar sleeve and an annular pile breaker, the steel bar inner ring necking structure comprises an upper necking cover, a lower necking cover and wedge blocks located on the sides of the upper necking cover and the lower necking cover, and a plurality of vertically-through open holes are symmetrically formed in the upper necking cover and the lower necking cover; when the upper necking cover and the lower necking cover are aligned, the upper open hole and the lower open hole are aligned to form a cement paste through hole, the cement paste through hole is narrow in the middle and wide in the vertical direction, slope surfaces are symmetrically arranged on the two sides of the lower surface of the upper necking cover and the two sides of the upper surface of the lower necking cover, and when the upper necking cover and the lower necking cover are aligned, wedge-shaped grooves are formed in the two side faces of the upper necking cover and the two side faces of the lower necking cover, and the wedge blocks are arranged in the wedge-shaped grooves. According to the method, only one-time pile breaking operation needs to be carried out on the bottom of the to-be-broken pile head, existing tedious pile breaking operation on multiple positions of the pile head is omitted, and the pile breaking efficiency can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of engineering construction, in particular to a concrete pile head breaking device and a method for using the same. Background technique [0002] When pouring the cast-in-place pile, it is difficult to guarantee the strength of the pile head due to the upward return of the cement slurry during the vibrating process of the concrete. Therefore, the top elevation of the cast-in-place pile should be 0.8~1.0m higher than the designed pile top elevation. The part above the elevation is chiseled to ensure the strength of the pile head concrete. The work of chiseling this part of the pile head concrete is called "breaking pile head". Only one circle of longitudinal reinforcement is set on the pile head part to be chiseled, and no stirrups are set. [0003] The tools for breaking the pile head are mainly divided into manual and mechanical, mainly mechanical pile head breaking. The main method is to vibrate and knock...

AI Technical Summary

Problems solved by technology

[0005] 1. For one pile head, multiple vibrations are required to break the pile, and the entire pile head needs to be crushed in stages, and the work efficiency is very low

[0006] 2. It will inevitably cause damage to the longitudinal reinforcement, which will reduce the bearing capacity of the cap in the subsequent construction of the cap

[0007] 3. When the forklift removes the concrete inside the longitudinal reinforcement, if the diameter of the concrete pile is small, it is difficult for the bucket of the forklift to remove the concrete inside the center without greatly bending the longitudinal reinforcement. The price is that it is easy to damage the steel bar and does not meet the specification requirements (the steel bar cannot be bent more than 15°)

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