First Casing Screw Drill Set

Abstract

We provide a first casing screw drill set that enables the efficient removal of underground obstacles in a way that eliminates the need to change procedures or setups during the process. [Solution] The screw drill 2 comprises a first casing 3 having a hollow cylindrical first casing body 4 and a drilling bit 5 provided at one end of the lower side of the first casing body, a spiral blade 6 that widens from bottom to top, a tip auger bit 7 provided at the lower tip of the spiral blade, and an intermediate auger bit 8 provided in the middle of the spiral blade, the screw drill is fixed inside the first casing body, the upper part of the spiral blade is located above the first casing body, and the tip auger bit is located above the drilling bit, and excavated soil can be discharged from the spiral blade.

Description

Technical Field

[0001] The present invention relates to a first casing screw drill set required for a multi-drill machine, an earth drill machine, etc., which efficiently removes underground obstacles in underground obstacle removal work.

Background Art

[0002] As a method for removing underground obstacles, first, excavation in the ground was performed with a first casing drilling bit, and after advancing until reaching a predetermined position, further excavation was performed with an auger bit of a spiral screw drill to discharge the obstacles and the residual soil.

[0003] Regarding the removal of underground obstacles, in recent years, it has become complicated in the removal of firm inclined piles and pile structures, etc., and the difficulty of removing underground obstacles has increased, making construction difficult due to the lengthening of the construction period.

[0004]

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

[0006]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] In the conventional work, first, excavation in the ground was performed with a first casing, and then the setup was changed and excavation was continued using an auger drill. Therefore, since these two work processes were performed separately, the current situation is that the efficiency is very poor. [Means for solving the problem]

[0008] This invention relates to a screw drill set comprising a first casing having a hollow cylindrical first casing body and a drilling bit provided at one end of the lower side of the first casing body, and a screw drill having a spiral blade that widens from bottom to top, a tip auger bit provided at the lower tip of the spiral blade, and an intermediate auger bit provided in the middle of the spiral blade, with the screw drill fixed inside the first casing body. The upper part of the spiral blade is located above the first casing body, and the tip auger bit is located above the cutting bit, and is characterized by enabling the discharge of excavated soil from the spiral blade. [Effects of the Invention]

[0009] The first casing screw drill set of this invention integrates the first casing and the screw drill, eliminating the need to change the setup. Furthermore, the drilling bit of the first casing excavates the outer ground, and after a certain distance, the tip bit of the auger drill body cuts, followed by the intermediate bit excavates the ground and breaks up underground obstacles, enabling efficient excavation and allowing the removal of excavated soil adhering to the spiral blades of the auger drill. [Brief explanation of the drawing]

[0010] [Figure 1] Obstacle removal and overview diagram for the multi-drill machine / earth drill machine of the present invention. [Figure 2] Structural diagram of the bit-equipped fast casing screw drill. [Figure 3] Structural drawing of the case as seen from the bottom. [Figure 4] Construction structural drawings for this project (a)(b)(c) [Modes for carrying out the invention]

[0011] This invention describes how to perform underground obstacle removal work using a first casing screw drill set attached to a multi-drill machine / earth drill machine. The process involves starting to excavate the ground from the outside with a first casing equipped with an excavation bit to destroy existing underground obstacles, then the auger bit at the tip of the screw drill excavates, and at regular intervals, a spiral intermediate auger bit breaks up the ground, after which the excess soil and other materials attached to the flared spiral blades are discharged to the outside. The embodiments of this invention are not limited to the following examples. In the following description, the same materials and reference numerals may be omitted for the same components and parts. [Examples]

[0012] Figure 1 illustrates that the first casing screw drill set of this invention can be used to excavate and dig through the ground, remove underground obstacles, and discharge excavated soil. The excavation machine, multi-drill machine / earth drill machine A, is coupled to mast C, and the first casing screw drill set 1 is attached to the Kelly bar B which is connected to it.

[0013] Figure 2 is a diagram illustrating the structure of the first casing screw drill set 1 of the present invention. The first casing is joined to the Kelly bar B of the Kelly box 10, and the spiral blades 6 and screw drill 2 are equipped with a tip auger bit 7 and an intermediate auger bit 8. The first casing body 4 of the first casing 3 is fixed by connecting welds 9, and a drilling bit 5 is attached to the lower part of the first casing body 4.

[0014] Figure 3 is an explanatory diagram showing the first casing screw drill set 1 mounted on the first casing 3 as viewed from the bottom, with the cutting bit 5 and spiral blade 6 fixed by connecting welds 9, a tip auger bit 7 and an intermediate auger bit 8 provided, and a Kelly box 10 positioned therein.

[0015] Figure 4 shows the excavation process by the first casing screw drill set 1. (a) The excavation bit 5 of the first casing body 4 starts to excavate by crushing the ground (dotted line). (b) The tip auger bit 7 of the screw drill 2 and then the intermediate auger bit 8 further crush the ground at regular intervals. (c) The crushed residual soil is discharged from the spiral blades.

[0016] The first casing screw drill set of the present invention integrates the first casing and the screw drill, eliminating the need for setup rearrangement. Also, the excavation bit of the first casing digs the outer ground, and then at a certain distance, the tip bit of the auger drill body in the next process cuts it. Subsequently, the intermediate bit digs the ground to crush obstacles in the ground, enabling efficient excavation and discharging the residual soil adhering to the spiral blades of the auger drill.

Description of Symbols

[0017] A Excavating machine Multi-drill machine · Earth drill machine B Kelly bar C Mast 1 First casing screw drill set 2 Screw drill 3 First casing 4 First casing body 5 Excavation bit 6 Spiral blades 7 Tip auger bit 8 Intermediate auger bit 9 Connecting weld 10 Kelly box

Claims

[Claim 1] A first casing 3 having a hollow cylindrical first casing body 4 and a drilling bit 5 provided at one end of the lower side of the first casing body 4, The screw drill 2 has a spiral blade 6 that widens from the bottom to the top, a tip auger bit 7 provided at the lower tip of the spiral blade 6, and an intermediate auger bit 8 provided in the middle of the spiral blade 6. A first casing screw drill set characterized in that a screw drill 2 is fixed inside the first casing body 4, the upper part of the helical blade 6 is located above the first casing body 4, and the tip auger bit 7 is located above the drilling bit 5, and excavated soil can be discharged from the helical blade 6.

Images