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A square hole drilling device and working method

A drilling device and a technology for square holes, which are applied in drilling equipment and methods, earthwork drilling, supporting devices, etc., can solve the problems of low efficiency and high labor intensity, and achieve the effect of reducing labor intensity and high construction efficiency.

Active Publication Date: 2022-03-25
JINAN MUNICIPAL ENG DESIGN & RES INSITITUTE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the pile-forming method of square piles mainly adopts the method of artificially forming holes or improving the cylindrical piles after forming holes. The inventors found that this construction method has low efficiency and high labor intensity.

Method used

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  • A square hole drilling device and working method
  • A square hole drilling device and working method
  • A square hole drilling device and working method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0038] This embodiment discloses a working method of a square hole drilling device:

[0039] The casing is pre-inserted into the soil to be drilled by a pile driver.

[0040] Move the rotary drilling rig to the position to be drilled, and the rotary drilling rig drives the main shaft to rotate and move downward to drill the soil inside the casing.

[0041]The second earth extractor is rotated under the driving of the second shaft section, and the soil is excavated first. Under the action of the second earth extractor, a circular hole is excavated. Since the first earth extractor is located above the second earth extractor, Therefore, the second earth extractor enters the circular hole dug by the first earth extractor. Since the axis of the third shaft segment is not on the same line as the axes of the first and second shaft segments, the third axis The axes of the first shaft section and the second shaft section rotate, and the first soil extractor with a Leroy triangle in cr...

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Abstract

The invention relates to a square hole drilling device and a working method, comprising a main shaft, the main shaft includes a first shaft section and a second shaft section arranged coaxially, and a non-coaxial shaft is arranged between the first shaft section and the second shaft section. The third shaft section is provided, and the third shaft section is rotatably connected with the first soil fetcher with a triangular cross-section, and the second shaft section is fixedly connected with a second soil fetcher with a circular cross-section; power mechanism: with the first shaft Segment connection can drive the lifting movement and rotation of the main shaft; casing: the cross section is square, used for pre-inserting into the soil to be drilled, the drilling device of the present invention has high construction efficiency and low labor intensity.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a square hole drilling device and a working method. Background technique [0002] The statements herein merely provide background related to the present invention and do not necessarily constitute prior art. [0003] In engineering, the pile foundation is usually made into a cylindrical shape due to the characteristics of the circular shape that is easy to form holes. In practical engineering, cylindrical piles have smaller bearing capacity than square piles of the same volume when used as friction piles due to their shape characteristics. When calculating reinforcement, their bending resistance is also much inferior, especially in large-span structures. , In the single pile structure, the square pile has a greater advantage. [0004] At present, the method of forming square piles is mainly artificial holes or cylindrical piles after hole forming. The inventor ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/00E21B15/00
CPCE21B7/001E21B7/003E21B15/00
Inventor 马正李军张光利郑志超葛丰源匡伟杨帆
Owner JINAN MUNICIPAL ENG DESIGN & RES INSITITUTE GRP