A single-waisted multi-leaf cylinder drill bit and a hole-forming construction method for bored piles

A technology of bored cast-in-place piles and construction methods, which are applied to drill bits, sheet pile walls, drilling equipment, etc., can solve problems such as difficulties in bored cast-in-place piles, and achieve the effects of good wall protection, good guidance, and reduced scouring.

Active Publication Date: 2017-03-08
ZHEJIANG YUJIAN CONSTR GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This brings certain difficulties to bored piles in the construction process.

Method used

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  • A single-waisted multi-leaf cylinder drill bit and a hole-forming construction method for bored piles
  • A single-waisted multi-leaf cylinder drill bit and a hole-forming construction method for bored piles

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Embodiment Construction

[0025] Such as figure 1 , 2 As shown, the present invention discloses a single-waist multi-lobe cylindrical drill bit for bored piles, including a single-waist multi-lobe tapered drill bit 10, and a positioning guide cylinder 6 is fixedly welded at the end of the single-waist multi-lobe tapered drill bit 10. A plurality of positioning and guiding cylinder tungsten steel heads 7 are distributed on the circumference edge of one end of the positioning guiding cylinder 6 .

[0026] Further, the single waist multi-lobe tapered drill bit 10 includes a drill rod 1, and the outer peripheral surface of the drill rod 1 is fixedly welded with several horizontal leaves 3, and several horizontal leaves 3 are connected in series through the horizontal ring 2; the drill rod 1 and the horizontal ring 2 are connected by several oblique leaves 4, and the ends of the oblique leaves 4 of the drill pipe 1 are fixedly welded with a triangular drill bit 9, and the triangular drill bit 9 is located ...

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Abstract

The invention belongs to the field of building construction and particularly relates to a single-waist multi-leaf hose bit for a bored pile and a drilling construction method thereof. The technological process comprises the steps of positioning and sampling, centering in position, forming a hole, clearing the hole for the first time, descending a reinforcement cage, descending a guide pipe, clearing the hole for the second time and pouring concrete. The single-waist multi-leaf hose bit for the bored pile comprises a single-waist multi-leaf taper bit body. A positioning and guiding cylinder is fixedly welded to the end of the single-waist multi-leaf taper bit body. A plurality of positioning and guiding cylinder tungsten steel heads are distributed on a circumferential edge opening of one end of the positioning and guiding cylinder. The single-waist multi-leaf hose bit of the bored pile and the drilling construction method thereof have the advantages that the directivity is good, the hole forming perpendicularity is high, the wall protecting effect is good, deslagging is convenient, the hole forming speed is high, and the rock breaking speed is high.

Description

technical field [0001] The invention belongs to the field of building construction, and in particular relates to a single-waist multi-leaf cylindrical drill bit for bored piles and a hole-forming construction method. Background technique [0002] In recent years, with the emergence of large-scale industrial, civil buildings, high-rise buildings and other projects, the natural foundation cannot meet the load requirements. Bored piles have become a common choice in construction projects due to their strong adaptability, large bearing capacity, moderate cost, and simple construction. base form. However, most of the foundations of bored piles used in high-rise buildings take the moderately weathered rock formation as the bearing layer. [0003] Conical drill bits, roller cone bits and barrel drill bits are generally used to form holes for rock-socketed piles in soft soil areas. [0004] The guiding performance of the tapered drill bit is poor, the hole is easy to collapse duri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/42E21B10/26E02D5/38E02D15/04
CPCE02D5/38E02D15/04E21B10/26E21B10/42
Inventor 刘军凌阳张剑沈建成裘炜炜应征东
Owner ZHEJIANG YUJIAN CONSTR GRP CO LTD
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