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Bored pile cleaning device

A technology for drilling cast-in-place piles and hole cleaning devices, which is applied to drilling tools, sheet pile walls, drilling equipment, etc., can solve problems such as long hole cleaning time, difficulty in ensuring pile quality, and incomplete hole cleaning.

Inactive Publication Date: 2018-08-21
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the hole cleaning is not thorough, the hole cleaning time is long, and the pile quality is difficult to guarantee

Method used

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  • Bored pile cleaning device
  • Bored pile cleaning device
  • Bored pile cleaning device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0017] Embodiment: A device for clearing bored cast-in-situ piles, comprising a drill pipe 1, on which at least one stirring paddle 2 is installed, the stirring paddle is composed of a paddle 3 and a paddle hub 4, and the circumference of the paddle hub is Hooped on the drill pipe, the paddle has at least two blades and is fixed on the paddle hub with the blade facing upward.

[0018] The propeller hub is composed of two petals. One end of the two-petal propeller hub is a concave-convex groove 5, and the other end is a butt joint 6 folded along the axial direction. The radians of the two-petal propeller hubs are equal and less than 180 degrees.

[0019] The stirring paddle is fixed on the drill pipe through the hoop function of the two paddle hubs. After the drill pipe is connected, insert the stirring paddle into the drill pipe. There can be multiple stirring paddles, which are arranged on the drill pipe at a certain interval according to the construction requirements, and th...

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Abstract

The invention discloses a hole cleaning device for a cast-in-situ bored pile. The hole cleaning device comprises a drill pipe. At least one stirring paddle is installed on the drill pipe and composed of blades and a paddle hub, wherein the paddle hub surrounds the drill pipe in a hooped mode, the number of the blades is at least two, and the blades are fixed to the paddle hub with the blade surfaces facing upwards. During primary hole cleaning of positive circulating rotation, the drill pipe drives the stirring paddles fixed to the drill pipe to rotate, and in combination with the idling of a drill bit, dregs arising from the pile bottom are effectively and gradually pushed upwards, so that the carrying efficiency of the dregs is improved, the thickness of the dregs is lowered, and the hole cleaning efficiency and the bearing capacity of a pile foundation are improved. Meanwhile, the concentration of sludge at the pile bottom is high, the sludge pushed upwards by the blades has a painting function on a hole wall, the circulation speed of the sludge is increased due to the lifting function of the blades, formation of a sludge cover is accelerated, and occurrence of a hole collapse phenomenon is reduced. The hole cleaning device for the cast-in-situ bored pile is simple in structure, convenient to operate, high in dreg cleaning efficiency, high in dreg cleaning depth, good in economic benefit, and obvious in effect during hole cleaning for the ultra-deep cast-in-situ bored pile.

Description

technical field [0001] The invention relates to the field of building foundation construction, in particular to a hole cleaning device for bored cast-in-place piles. Background technique [0002] Clearing holes is an important link in the construction of bored piles, and the quality of clearing holes will directly affect the quality of piles. The hole cleaning method used in the traditional positive circulation rotary drilling construction is: after the hole is finished, the drill bit is lifted away, and the mud with more suspended drilling slag in the hole is replaced by the mud stirred by the drill bit and pressed in. The disadvantage of this method is that the hole cleaning is not thorough, the hole cleaning time is long, and the pile quality is difficult to guarantee. With the increasing number of high-rise buildings in our country, the importance of deep foundations is becoming more and more important. The construction technology in the process of pile formation plays ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B12/06E02D13/08
CPCE02D13/08
Inventor 江建洪冯建光
Owner SUZHOU UNIV
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