One-time hole cleaning device and hole cleaning method for bored piles

Abstract

The invention provides a device for clearing bored cast-in-situ piles at one time, which includes a slag collection bucket, an upper horizontal frame of the slag collection bucket, a kelly, an upper baffle plate for the kelly, a lower baffle plate for the kelly, a horizontal support rod, The first vertical strut, the second vertical strut, the oblique strut, the oblique push rod, the umbrella-shaped slag collecting bucket hat top square hole, the square hole, the slag retaining plate, the chute, the horizontal push rod, the horizontal push rod Guide ring, extension spring of slag collection mechanism, lower horizontal frame of slag collection bucket, vertical plate, short shaft, protrusion, bottom plate of slag collection bucket, slag collection knife plate, connecting inclined plate, rubber strip. The one-time hole cleaning device for bored piles of the present invention is to clean the holes after the reinforcement cage is lowered, changing the existing one-time and two-time hole cleaning methods. The hole can be cleaned at one time, and the hole can be completely cleaned without leaving any sediment, the quality of the pile body can be guaranteed, and the bearing capacity of the pile tip can be fully exerted.

Description

technical field [0001] The invention belongs to the field of building engineering construction, and in particular relates to a hole-clearing device and a hole-clearing method for bored cast-in-situ piles. Background technique [0002] "Technical Specifications for Building Pile Foundations" stipulates that the control standard for sediment thickness at the bottom of bored piles is: end-supported piles should not be greater than 50mm; friction piles should not be greater than 100mm; conventional sediment thickness measurement methods during construction are the A measuring rope with a steel bar hanging on one end is put into the drill hole, and it is completely based on feeling, more is more, and less is less. If the sediment is not removed, a large amount of sediment will appear on the surface after the final concrete pour. The cast-in-place pile is a concealed project, and a large amount of sediment that has been squeezed to the surface can be seen. More sediment may have ...

AI Technical Summary

Problems solved by technology

This method is difficult to remove when encountering large mud at the bottom of the hole; when the sand content of the mud is high, the purpose of thoroughly cleaning the hole cannot be achieved.

[0003] Practice has found that due to the complex geological conditions, the drilling is not very straight. During the process of lowering the reinforcement cage, the reinforcement cage will also wipe off the soil on the hole wall and sink to the bottom of the hole, forming new sediment, which requires a second cleaning of the hole , the conventional method is: after the catheter is installed, use the catheter to pump reverse circulation to clean the hole. This method also cannot guarantee that the hole is completely cleaned.

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