Hole cleaning system and method for cast-in-place pile

Abstract

The invention provides a hole cleaning system and method for a cast-in-place pile, and belongs to the field of cast-in-place pile hole cleaning construction. The hole cleaning system comprises a craneassembly, an air compressor, a high-pressure air pipe and a slag cleaning barrel for a primary hole cleaning procedure, wherein the crane assembly hoists the slag cleaning barrel to the bottom of a pile hole provided with a sleeve, and a gap is formed between the slag cleaning barrel and the bottom of the pile hole; and the air compressor outputs high-pressure air to the gap through the high-pressure air pipe, and after being mixed, sediment at the bottom of the pile hole rises and flows along the gap between the slag cleaning barrel and the sleeve and enters the slag cleaning barrel from thetop end of the slag cleaning barrel. Therefore, the problems that on site, gas lift reverse circulation hole cleaning operation of slurry in the sleeve needs to be achieved, circulation pipelines areextremely difficult to arrange, a slurry pool, the air compressor, the circulation pipelines and the like need to be arranged, the on-site installation time is long, a large crane is used for assisting in operation, and the construction efficiency is greatly affected are solved.

Description

technical field [0001] The invention relates to the field of borehole cleaning construction of cast-in-place piles, in particular to a borehole-clearing system and a hole-clearing method for cast-in-place piles. Background technique [0002] The full-casing full-rotary drilling rig is a full-casing construction equipment that can drive the casing to rotate 360 ​​degrees. It has been more and more widely used in the construction of cast-in-place piles under complex ground conditions. The construction process is mainly as follows: use the rotary device of the full-casing full-rotary drilling rig to greatly reduce the frictional resistance between the steel casing and the soil layer, press in while rotating, and at the same time use the punching bucket to dig and take soil until the casing sinks to up to the bearing layer at the pile end; after the hole is excavated, confirm the hole depth and the bearing layer, and use the slag bucket to remove the virtual soil in the hole so ...

AI Technical Summary

Problems solved by technology

However, since the operating platform of the fully-rotary full-casing drilling rig is about 3m above the ground, it is extremely difficult to lay out the circulation pipeline to realize the mud gas lift reverse circulation hole cleaning operation in the casing on site, and it is necessary to lay out mud pools, air compressors and circulation pipelines, etc. , the on-site installation time is long, and a large crane is used to assist the operation, which greatly affects the construction efficiency

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