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Screw-thread fit type combination drill tool, preparation method and shape pile

A compound drilling and threading technology, which is applied to drilling equipment and methods, drilling equipment, drill bits, etc., to achieve the effects of improving work efficiency, increasing the bearing capacity of single piles, and reducing engineering costs

Pending Publication Date: 2019-08-20
李广信
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of thread fit composite drilling tool and type pile, to solve the technical problems existing in the prior art

Method used

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  • Screw-thread fit type combination drill tool, preparation method and shape pile
  • Screw-thread fit type combination drill tool, preparation method and shape pile
  • Screw-thread fit type combination drill tool, preparation method and shape pile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] combine Figure 1 to Figure 6 As shown, the present embodiment provides a threaded compound drilling tool, which includes: a first power drilling tool 1 and a second power drilling tool 2; the second power drilling tool 2 is set on the first power drilling tool 1, the first power drilling tool 1 and the second power drilling tool 2 are respectively equipped with a power mechanism, and the power mechanism can independently drive its corresponding drilling tool to rotate; the first power drilling tool 1 is in its An external thread structure 121 is provided on the outside of the core pipe of the drill main body, and the external thread structure 121 is used to act as a helical blade of the first power drill 1; An internal thread structure 221 is provided inside the core pipe, and the internal thread structure 221 is adapted to the external thread structure 121 to form a threaded connection. The second power drilling tool 2 is driven by its power mechanism , can reciproca...

Embodiment 2

[0078] Such as Figure 7 to Figure 13 and Figures 14 to 20 As shown, the present embodiment 2 provides a kind of two preparation methods for preparing the type pile 4 according to the above-mentioned threaded composite drilling tool for different site conditions, which include: according to the needs of the stratum for the construction method, the first power drilling tool 1 1. The second power drilling tools 2 are respectively drilled to their respective design depths, so as to form rounded step-shaped drilling holes; during the drilling process of each drilling tool, the middle sleeve drilling tool 22 reciprocates up and down in the soil squeezing area of ​​the pile hole. Single rotary extrusion, the rotary displacement soil of the first power drilling tool 1 is squeezed multiple times / single time, squeezed and expanded until the compactness of the upper and lower walls of the overall pile hole is relatively balanced; start the concrete pump 5, and start to compress Concre...

Embodiment 3

[0111] Such as Figure 21 to Figure 22 As shown, the present embodiment provides a type pile (variable-diameter threaded pile 4) prepared by the threaded composite drilling tool, comprising: a main pile body 41; the main pile body 41 is provided with rounded steps Shaped body 42; the main pile body 41 is provided with a threaded structure at its lower pile body; the angle range between the rounded platform bus extension line of the rounded step shaped body 42 and the central axis of the main pile body 41 is: 5°~90°.

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Abstract

The invention relates to the civil engineering technology field, in particular to a screw-thread fit type combination drill tool, a preparation method and a shape pile. The screw-thread fit type combination drill tool comprises a first power drill tool and a second power drill tool, wherein a helical blade on the outer side of a central core tube of the first power drill tool is of external threadstructure, the second power drill tool is formed by a drill tool main body having a soil squeezing and discharging combined function, an internal thread structure is arranged on the inner side of a central core tube of the second power drill tool, the internal thread structure on the second power drill tool and the external thread structure on the first power drill tool are matched with each other so as to form a thread connection, and further form a nut and lead screw relationship, and the second power drill tool can perform up-down reciprocating / one-time spin squeezing in a pile hole soil squeezing area under drive of an equipped power mechanism, and performs repeated / one-time squeezing and squeezed expansion on spirally discharged oil of the first power drill tool (center drill tool) for soil elimination until compactness of the hole wall of the whole pile hole reaches relative equilibrium from the top down.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a threaded composite drilling tool, a preparation method and a type pile. Background technique [0002] In the soft foundation treatment of building structures or bridges, ports, railways, highways, airports, water conservancy and hydropower facilities, etc., the foundation soil that needs to be treated can be generally divided into weak sites from shallow to deep according to the change law of equivalent shear wave velocity. Soil, medium-soft site soil, medium-hard site soil, hard site soil; foundation soil from shallow to deep, and the density changes from loose to dense, reflecting the theory of rock and soil deposition. According to the degree of compactness of the site soil and the distribution of each soil layer, the foundation soil can be simply divided into the compacted soil area (weak site soil, medium soft site soil, except for high water content or saturated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/00E21B10/44E21B17/22E02D15/04E02D5/36
CPCE21B7/002E21B7/005E21B10/44E21B17/22E02D15/04E02D5/36
Inventor 李广信
Owner 李广信