WO2022055298A1

WO2022055298A1 - Hole enlargement auger device and hole enlargement pile constructing method using same

Info

Publication number: WO2022055298A1
Application number: PCT/KR2021/012343
Authority: WO
Inventors: 정순용
Original assignee: 이지지오텍
Priority date: 2020-09-11
Filing date: 2021-09-10
Publication date: 2022-03-17
Also published as: KR102347012B1; KR20220034714A

Abstract

The present invention relates to a hole enlargement auger device and a hole enlargement pile constructing method using same, by which a boring hole can be drilled into the ground while the diameter of the lower end of the hole is enlarged, and without a separate mechanical manipulation or erroneous operation, an auger wing can be unfolded by downward movement to enlarge and drill a hole, or can be folded and retrieved only by upward movement.

Description

Expansion auger device and method of construction of excavation pile using the same

The present invention relates to an excavation auger device and a method for constructing an excavation pile using the same, and more particularly, it can be drilled by increasing the diameter of the lower end of the drilling hole in hard ground such as weathered soil and weathered rock, and can be drilled downward without separate mechanical manipulation and malfunction It relates to an expansion auger device capable of expanding the auger wing by moving and drilling, and recovering by folding the auger wing only by moving upward, and a method for constructing an expansion pile using the same.

The pile construction method being constructed in Korea can be divided into three types: the hole drilling method, the buried method, and the on-site casting method.

Among them, the punching method is a method that has been traditionally used as a direct punching method in which the pile is directly hit. This method has recently been used very limitedly due to pollution such as noise and vibration generated during driving of piles.

In order to solve the problems of noise and vibration during the construction of the drilling method, the buried method is recently used a lot. There is this. Here, the heavy excavation method is a method of inserting an excavation rod with an excavation bit and a spiral for plastering into the hollow part of the base pile, and immersing the base pile while excavating the ground using the excavation bit protruding from the tip of the base pile am.

1 is a view showing a conventional general pile construction apparatus.

A related prior art, Korean Patent Laid-Open Publication No. 10-2011-0103787, inserts an excavation rod into a hollow part of the main pile, and excavates the excavation bit installed at the tip of the excavation rod while protruding from the tip of the main pile immersing the main pile until it reaches the support layer of the ground while excavating the ground by rotating the rod forward; forming a preliminary bulb by rotating the excavation rod forward to excavate the support layer with the excavation bit; protruding an enlarged bit (or auger bit) to the outside of the excavation rod, and continuously rotating the excavation rod forward to expand and excavate some or all of the preliminary bulb with the enlarged bit to form an enlarged bulb; and injecting the bulb expansion solution into the preliminary bulbs and the expanded bulbs formed in the support layer, and inserting the main stakes into the expanded bulbs.

As shown in Korean Patent Laid-Open No. 10-2011-0103787, when forming an enlarged bulb, an auger equipped with a bit is put in a circular tube and rotated while rotating in reverse to each other, and at this time, the bit attached to the end of the auger cuts the ground. The excavated and excavated soil comes up on the excavation rod interpolated inside the circular tube and is discharged to the outside.

In order to scrape the ground a little wider than the inner diameter of the pile, or to excavate more widely around the tip of the pile after the end of the drilling, the drill bit or the drill auger is applied.

The conventional digging bit or digging auger is provided with an expansion structure on the side of the excavation rod, and is configured to be expanded by the operation of a mechanical device provided separately for forward/reverse rotation or expansion.

However, the conventional expansion auger must be provided with a separate complex mechanical device or hydraulic device to expand or fold the expansion auger, so that the hollow part through which air normally passes is utilized as a space for the operation of the mechanical device or hydraulic device, or a complex additional configuration There was a problem that required

In addition, in the prior art, it is folded during forward rotation and unfolded during reverse rotation, so after drilling, the expanded part must be folded by rotating forward again.

Therefore, the present invention for solving the above-mentioned problems of the prior art can be drilled by expanding the diameter of the lower end of the drilling hole even with a conventional drilling method that rotates while pressing without a separate mechanical operation or malfunction in hard ground such as weathered soil and weathered rock. The purpose of this is to provide an expansion auger device and a method for construction of an expansion pile using the same, which can be recovered by folding the auger wing only by moving the auger wing and expanding it by downward movement without separate mechanical manipulation and malfunction. .

According to one aspect of the present invention for achieving the above objects and other features of the present invention, after forming a drilling hole in the ground or rock, the drilling hole is detachably coupled to the excavation rod to form the drilling hole in the lowermost part of the drilling hole. In the auger device, a connection portion formed at the upper end to be connected to the lower end of the excavation rod, an auger wing receiving portion formed on the front surface of the lower end to receive the following auger wing, a hinge pin receiving hole for preventing the detachment of the hinge pin, and an auger housing comprising a through hole formed as a movement passage for air and injection material therein, and an outer diameter of which is less than or equal to the inner diameter of the drilling hole; An auger wing coupling portion fitted to the auger wing receiving portion of the auger housing, a hinge pin through hole through which a hinge pin for preventing separation from the auger housing passes, and an auger wing protrusion protruding out of the outer diameter of the auger housing a pair of ogre wings comprising; a hinge pin passing through the hinge pin through hole and coupled to the hinge pin receiving hole to prevent separation of the auger wing and the auger housing; and a plurality of auger tips provided on the front surface of the auger wing to crush the ground; including, when touching the bottom of the drilling hole, rotate around the hinge pin to unfold the pair of auger wings and the auger wing protrusion Expansion auger device is provided, characterized in that by extending out of the outer diameter of the drilling hole, drilling the ground with an outer diameter wider than the outer diameter of the drilling hole to form a drilling hole.

According to the expansion hole auger device and the method for construction of an expansion pile using the same according to the present invention, the following effects are provided.

First, the present invention has the effect of being able to carry out the folding of the auger wing for the expansion and recovery of the auger wing for the drilling operation without a separate mechanical configuration.

Second, in the present invention, even if the auger wing is not completely folded by its own weight when recovering the auger wing, it can be folded naturally by being caught at the bottom of the drilling hole when lifting the excavation rod (the excavation rod with the screw attached), thereby eliminating the malfunction in the recovery stage. It has the effect of improving workability as the driver does not need to pay attention to the depth to which the ogre wing needs to be unfolded and folded.

Third, the present invention has the effect of securing functionality and manufacturability by enabling the unfolding and folding of the auger wing while having a simple structure.

Fourth, the present invention has the effect of increasing the digging ratio because the auger wing is provided by utilizing the entire space of the lower surface of the excavation rod, not the relatively narrow side, so that it can be unfolded and folded.

Fifth, the present invention does not require a separate complicated mechanical device for unfolding the auger wing, so that the air passage of the excavation rod can be fully used.

Sixth, the present invention has the effect of securing applicability because it can be easily replaced and mounted on the lower end of the excavation rod only the excavation auger device without a separate equipment modification to perform the unfolding and folding function.

Effects of the present invention are not limited to those mentioned above, and other solutions not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a view showing a conventional general pile construction apparatus.

Figure 2 is a view showing the expansion hole construction state of the expansion auger device and the expansion auger device according to the present invention.

Figure 3 is a view showing a state in which the slime blocking means is provided on the excavation rod to which the screw constituting the excavation auger device according to the present invention is attached.

Figure 4 is an exploded perspective view showing the expansion auger assembly constituting the expansion auger device according to the present invention.

Figure 5 is a side view showing the expansion auger assembly constituting the expansion auger device according to the present invention, a view showing a part cut off.

Figure 6 is a view showing a coupling example of a pair of auger wings constituting the expansion auger assembly of the expansion auger device according to the present invention.

7 is a view showing another type of auger tip applied to the auger wing constituting the expansion auger assembly of the expansion auger device according to the present invention.

8 is a side view showing another embodiment of the expansion auger assembly constituting the expansion auger device according to the present invention, and is a view showing a part cut away.

9 is a view schematically showing the construction process of the drilling pile using the drilling auger device according to the present invention.

Figure 10 shows an embodiment of the spacing means for spacing a certain distance between the bottom of the drilling part and the bottom of the pile in the drilling pile according to the present invention.

According to the present invention, in the excavation auger device detachably coupled to the excavation rod of the drilling equipment, a connection portion formed in the upper end to be connected to the lower end of the excavation rod, and an auger wing formed in the front surface of the lower end to accommodate the following auger wing an auger housing comprising a receiving portion, a hinge pin receiving hole for preventing separation of the hinge pin, and a through hole formed as a passage for air and injection material therein, the outer diameter of which is less than or equal to the inner diameter of the perforated hole; An auger wing coupling portion fitted to the auger wing receiving portion of the auger housing, a hinge pin through hole through which a hinge pin for preventing separation from the auger housing passes, and an auger wing protrusion protruding out of the outer diameter of the auger housing a pair of ogre wings comprising; a hinge pin passing through the hinge pin through hole and coupled to the hinge pin receiving hole to prevent separation of the auger wing and the auger housing; and a plurality of auger tips provided on the front surface of the auger wing to crush the ground, wherein the auger wing receiving part is formed to transmit a rotational force and a downward pressing force in a state in which the auger wing is unfolded. A wing accommodating part, and a second oger wing accommodating part formed deeper than the first ogre wing accommodating part in the central part to increase resistance to rotational force even in the process of unfolding the ogre wing, and the ogre wing coupling part of the ogre wing is the A second auger wing coupling portion formed to correspond to the first ogre wing receiving portion, and a first ogre wing coupling portion formed to correspond to the second ogre wing receiving portion, wherein the second auger wing receiving portion is When viewed in plan view, the one oger wing accommodating part for accommodating the first ogre wing coupling part of one of the oger wings of the pair and the other ogre wing accommodating part for accommodating the first ogre wing coupling part of the other ogre wing, the Based on the longitudinal central axis of the hinge pin, the width of the one ogre wing accommodating part and the width of the other ogre wing accommodating part are respectively formed differently, and the widths formed relatively large in each of the one ogre wing accommodating part and the other ogre wing accommodating part are each other. It is made to be formed on the opposite side, the second ogre wing receiving portion is formed with a side wall portion facing a portion of the side of each of the first ogre wing coupling portions, so that both side surfaces of each of the first ogre wing coupling portions are the second It is made to be supported in the auger wing receiving part, so that when a steel pipe casing is installed in the ground or bedrock to prevent the collapse of the hole wall and the drilling of the hole in the ground, the hinge pin is centered Expansion auger device, characterized in that the auger wing protrusion extends outside the outer diameter of the drilling hole as the pair of auger wings are unfolded by rotating to, and the ground is drilled with an outer diameter wider than the outer diameter of the drilled hole to form a drilling hole provided

In one aspect of the present invention, the pair of auger wings are provided to be spread out in opposite directions, and a single hinge pin passing through all of the hinge pin through holes may be configured to prevent separation of the auger wing and the auger housing. there is.

In one aspect of the present invention, the ogre wing coupling portion, a first ogre wing coupling bottom surface in contact with the bottom surface of the second auger wing accommodating part which is flat, and a second ogre wing coupling part bottom surface in contact with the bottom surface of the second auger wing accommodating part by rotating a certain angle 2 is formed to have a bottom surface of the ogre wing coupling part, and a curved surface is formed between the first ogre wing coupling part bottom surface and the second auger wing coupling part bottom surface, and the first auger wing coupling part bottom surface and the second auger around the hinge pin. The wing coupling part bottom surface may be made to limit the rotation of the auger wing within a range in contact with the bottom surface of the second auger wing receiving part.

According to another aspect of the present invention, in the drilling pile construction method in which the ground is drilled to form a drilling hole, and a concrete pile is inserted and fixed by forming an drilling hole at the lowermost end of the drilling hole, the ground is drilled to a certain diameter to a predetermined depth A first step of forming a perforated hole up to; A second step of forming a drilling hole by additionally drilling to a predetermined depth with a diameter larger than the diameter of the drilling hole at the lower end of the drilling hole using the drilling auger device according to the above aspect; a third step of removing the slime under the drilling hole; a fourth step of injecting an injection material into the drilling hole; A fifth step of inserting a pre-fabricated concrete pile into the drilling hole is provided.

In another aspect of the present invention, a step 1-1 of installing a steel pipe casing to prevent collapse of the hollow wall at the same time as the drilling of the drilling hole; may further include.

In another aspect of the present invention, the second step is, after the completion of the first step, after the drilling hole is formed, a general auger without a drilling function at the bottom of the excavation rod is replaced with the drilling auger device, or a general hammer Step 2-2 of replacing the bit with the drilling auger device; may further include.

In another aspect of the present invention, a sixth step of hitting the top of the pile in the downward direction a plurality of times after the completion of the fifth step; may further include.

In another aspect of the present invention, the fifth step can be performed after providing a spacer means for spacing a predetermined distance between the bottom of the drilling hole and the bottom of the pile at the bottom of the concrete pile.

Additional objects, features and advantages of the present invention may be more clearly understood from the following detailed description and accompanying drawings.

Prior to the detailed description of the present invention, the present invention can make various changes and can have various embodiments, and the examples described below and shown in the drawings are not intended to limit the present invention to specific embodiments. No, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

When an element is referred to as being “connected” or “connected” to another element, it is understood that it may be directly connected or connected to the other element, but other elements may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

In addition, in the description with reference to the accompanying drawings, the same components are given the same reference numerals regardless of the reference numerals, and the overlapping description thereof will be omitted. In describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the expansion auger device and the method for construction of an expansion pile using the same according to a preferred embodiment of the present invention.

First, the diaphragm auger device according to the present invention will be described in detail with reference to FIGS. 2 to 6 . Figure 2 is a view showing the expansion hole construction state of the expansion auger device and the expansion auger device according to the present invention, Figure 3 is a slime blocking means provided on the excavation rod to which the screw constituting the expansion auger device according to the present invention is attached It is a diagram showing the state. 4 is an exploded perspective view showing the expansion auger assembly constituting the expansion auger device according to the present invention, Figure 5 is a side view showing the expansion auger assembly constituting the expansion auger device according to the present invention, a view showing a part cut and FIG. 6 is a view showing an example of coupling of a pair of auger wings constituting the expansion auger assembly of the expansion auger device according to the present invention.

As shown in FIGS. 2 to 6, the drilling auger device according to the present invention forms a drilling hole (H1) in the ground, and in the drilling auger device for forming a drilling hole (H2) in the lowermost part of the drilling hole, a normal screw (11) includes an excavation rod 10 to which is attached, and an excavation auger assembly (A) coupled to the lower end of the excavation rod. At the upper end of the excavation rod 10, a rotational force can be applied by a motor, and a mechanical device for performing a general drilling operation capable of moving the excavation rod 10 up and down is connected (refer to FIG. 1).

Specifically, as shown in FIGS. 2 to 6, the drilling auger device according to the present invention forms a drilling hole (H1) in the ground or rock, and forms a drilling hole (H2) in the lowermost part of the drilling hole (H1). In the expansion auger device that transmits the rotational force of the motor (M) provided at the upper end to the lower end, a passage for transmitting air is formed therein, and a spiral continuous screw 11 is provided on the outside thereof, An excavation rod 10 provided with a screw 11 for transferring the pulverized soil from the lower part to the upper part; And the upper part is coupled to the lower end of the excavation rod 10, the through hole 140, which is a movement passage of air and injection material, is formed therein, and a pair of auger wings provided to be expandable and foldable by their own weight are provided in the lower part It is configured to include a diaphragm auger assembly (A).

The excavation rod 10 provided with the screw 11 allows upward movement of the ground or rock mass (slime) generated by crushing the ground or rock by the pair of auger wings 200, and One or more slime blocking means 12 are provided on the screw 11 to block movement in the direction.

As shown in FIG. 3 , the slime blocking means 12 may be formed of a curved pipe member having a lower end (one end) communicating with the screw 11 and an upper end (the other end) opening laterally. In FIG. 3 , a solid arrow indicates an upward movement direction of the slime, and a dotted line arrow indicates a downward movement direction of the slime. In FIG. 3, the solid arrow is the upward movement direction of the slime when high-pressure air is injected through the through hole 140 provided in the expansion auger assembly (A) of the present invention, and the dotted arrow is the inside of the drilling hole after the high-pressure air injection is finished. This is the downward movement direction due to the gravity of the slime remaining in it. By spraying high-pressure air using this slime blocking means 12 to remove the slime and blocking the remaining slime and foreign substances falling from the upper part of the perforation hole, the injection material 420 is injected through the through hole 140. Contamination due to slime at the bottom of the hole can be minimized.

Next, the expansion auger assembly (A) is provided with a connection part 110, the upper portion of which is detachably coupled to the lower end of the excavation rod 10 to which the screw 11 is attached, and the passage of air and injection material therein. A through hole 140 is formed, and a pair of auger wings 200 that are provided to be expandable and foldable by their own weight are provided in the lower bottom portion and are configured.

The expansion auger assembly (A) is largely auger housing 100; a pair of ogre wings (200); and a hinge pin 300 .

Specifically, in the expansion auger assembly (A), the connection part 110 detachably coupled to the lower end of the excavation rod 10 to which the screw 11 is attached is formed on the upper side, and a pair on the front surface of the lower end The auger wing receiving part 120 for accommodating the auger wing 200 is provided, and a hinge pin receiving hole 130 for preventing the detachment of the hinge pin 300 is formed, and the passage of air and injection material is formed therein. The through hole 140 is formed, the outer diameter is less than the inner diameter of the perforated hole auger housing 100; The auger wing coupling part 210 fitted to the auger wing receiving part 120 of the auger housing 100, and a hinge formed in the auger wing coupling part 210 to prevent separation from the auger housing 100 A hinge pin through hole 220 through which the pin 300 passes, and an auger wing protrusion 230 integrally protruding from the auger wing coupling part 210 and extending to the outside of the outer diameter of the auger housing 100 . ) having a pair of auger wing 200; and a hinge pin 300 penetrating the hinge pin through hole 220 and coupled to the hinge pin receiving hole 130 to prevent separation of the auger wing housing 100 and the auger wing 200; do.

The excavation rod 10 is extendable along its length, and its lower end is usually a hexagonal female shape, and its upper end is a hexagonal male shape. . In accordance with this conventional excavation rod 10 connection standard, as shown in FIGS. 4 to 8, the connection part 110 of the drilling auger assembly (A) of the present invention is formed in a male shape of a hexagonal form, and a pin is inserted into the side to fix it. It is preferable to provide a pin coupling hole (111a, 111b) that can be. Of course, the shape or standard of the connection part can be changed to transmit the rotational force and the up-down force in response to the bottom of the excavation rod 10 .

Such a drilling auger assembly (A), when the auger wing 200 is unfolded when it touches the lower part of the drilling hole, the auger wing protrusion 230 is extended to the outside of the drilling hole outer diameter, the drilled hole (H1) (refer to FIG. 2) ), the ground is drilled with an outer diameter wider than the outer diameter to form an expansion hole H2 (see FIG. 2 ). Therefore, it is possible to drill the hole in the same way as a general drilling without a separate device or operation for unfolding the auger wing 200 and turning it in one direction while pressing.

The auger wing receiving part 120 of the auger housing 100 is the bottom surface (opposite side of the punching direction) of the auger wing protrusion 230 by applying the rotational force and downward pressing force in the state where each of the auger wing 200 is unfolded. The first auger wing accommodating part 121 formed in a groove shape so as to be transmitted to the surface), and the first ogre wing accommodating part 121 to increase resistance to rotational force in a state in which each of the auger wing 200 is unfolded. ) is formed deeper in the central portion and includes a second auger wing receiving portion 122 for accommodating the auger wing coupling portion 210 .

The first auger wing accommodating part 121 and the second auger wing accommodating part 122 receive a bottom surface portion (a portion opposite to the piercing direction) of the ogre wing 200 .

In other words, the second auger wing receiving part 122 is formed in the form of a groove in the central part of the auger housing 100, a pair of auger wing 200 overlapping a part in the coupling direction of the hinge pin 300, respectively. is formed to receive the auger wing coupling part 210 of the common, and the first auger wing receiving part 121 is respectively formed at a position in the diagonal direction from the second auger wing receiving part 122 to receive a pair of augers Each of the wings 200 is formed to receive a bottom side portion of the ogre wing protrusion 230 .

As will be described below, the first auger wing receiving part 121 accommodates the second auger wing coupling part 212 of the auger wing coupling part 210 of the auger wing 200, and the second auger wing receiving part 122 accommodates the first ogre wing coupling part 211 of the ogre wing coupling part 210 of the ogre wing 200 .

In addition, as the pair of auger wing 200 is accommodated in the second auger wing receiving part 122 , as shown in FIG. 6 , the second auger wing receiving part 122 and the auger wing coupling part The first auger wing coupling portion 211 of 210 is formed to have different widths on both sides with respect to the central axis of the hinge pin 300 to transmit rotational force.

That is, when the auger wing coupling part 210 of each of the pair of auger wing 200 is accommodated in the second auger wing receiving part 122 and coupled to the auger wing housing 100 through the hinge pin 300, 6, based on the center line CL of the hinge pin 300 (a line perpendicular to the rotation axis of the hinge pin), the distance L1 to one side and the distance L2 to the other side are formed differently from each other, which is Each of the wings 200 has a structure capable of resisting rotational force independently of each other. In the stage in which the auger wing 200 is unfolded, the first auger wing coupling part is not completely accommodated in the first auger wing receiving part, so the resistance to the rotation of the auger wing 200 is weak. By forming different distances between L1 and L2, rotational force can be transmitted even in the stage in which the auger wing 200 is not fully unfolded.

Next, the pair of auger wings 200 are spread out in opposite directions, and a single hinge pin 300 passing through all of the hinge pin through-holes 200 prevents separation from the auger housing 100 . provided

Specifically, the auger wing 200 is formed in the auger wing coupling part 210 fitted to the auger wing receiving part 120 of the auger housing 100, and the auger wing coupling part 210, and the auger The hinge pin through hole 220 through which the hinge pin 300 for preventing separation from the housing 100 passes, and the auger wing coupling part 210 are integrally protruded outside the outer diameter of the auger housing 100 . It is formed with an ogre wing protrusion 230 that is extended to be pushed out.

The first ogre wing coupling part 211 of the ogre wing coupling part 210 is a first ogre wing coupling part bottom surface 211a in contact with the bottom surface of the second ogre wing receiving part 122 that is a single plane (straight line). and the second auger wing coupling part bottom surface 211b in contact with the bottom surface of the second auger wing receiving part 122 by rotating at a predetermined angle, and the first ogre wing coupling part bottom surface 211a and the second auger wing coupling part Between the bottom surfaces 211b is formed as a curved surface.

The first auger wing coupling part 211 of the ogre wing coupling part 210 has a first ogre wing coupling bottom surface 211a and a second auger wing coupling bottom surface 211b with the hinge pin 300 as the center. 2 The rotation of the auger wing 200 is limited within the range in contact with the bottom surface of the ogre wing receiving part 122 .

In other words, the bottom surface of the first ogre wing coupling part 211, the first ogre wing coupling part bottom surface 211a in contact with the bottom surface of the second ogre wing receiving part 122, and the first ogre wing coupling part bottom surface ( It includes a second ogre wing coupling bottom surface 211b formed continuously with the first ogre wing coupling bottom surface 211a while forming an angular difference by a predetermined angle with respect to 211a).

In addition, the auger wing coupling part 210 is an auger facing the ogre wing coupling part outer surface 211c formed continuously with the first auger wing coupling part bottom surface 211a, and the auger wing coupling part outer surface 211c. A wing coupling portion inner surface (211d) is formed.

The first auger wing coupling part bottom surface 211a and the second auger wing coupling part bottom surface 211b form an angular difference, and the ogre wing coupling part outer surface 211c and the auger wing coupling part inner surface 211d are parallel to each other. The angular difference in the state is because the auger wing 200 is rotated by the angular difference. That is, as the auger wing 200 rotates, the bit coupling part 120 accommodated in the inner space of the bit housing body 200 of the auger wing 200 rotates smoothly within the second auger wing receiving part 122 . A curved surface was formed by removing unnecessary parts to make it possible. Therefore, the angular difference between the first auger wing coupling part bottom surface 211a and the second auger wing coupling part bottom surface 211b, the ogre wing coupling part outer surface 211c and the auger wing coupling part inner surface 211d are parallel to each other. The angle difference generated in is preferably the same as the angle at which the auger wing 200 is to be rotated.

In addition, when the second auger wing coupling part bottom surface 211b and the auger wing coupling part inner surface 211d are rotated and folded, the bottom surface of the second auger wing receiving part 122 and the second auger wing By coming into contact with the side surface of the receiving part 122, the auger wing 200 also serves to support the rotated state.

Subsequently, the auger tip 240 for perforating the ground is provided on the uncoupled exposed surface of the auger wing 200 (ie, the surface on the side facing the bottom of the drilling hole).

The auger tip 240 is a component for directly scraping the ground, and is made of a material having excellent resistance to abrasion, and the size and spacing thereof may be formed in various ways according to the characteristics of the ground.

7 is a view showing another type of auger tip applied to the auger wing constituting the expansion auger assembly of the expansion auger device according to the present invention, and a solid carbide button 250 is provided on the exposed surface of the auger wing 200 This makes it possible to drill hard ground.

In addition, between the auger wing receiving part 210 of the auger housing 100 and the wing auger 200, it communicates with the through hole 140 in the center of the auger housing 100, and a communication passage 261 through which air or injection material passes; 262) may be formed.

Specifically, the

communication passages

261 and 262 include a first communication passage 261 formed in the auger wing 200 to communicate with the through hole 140 of the auger housing 100 , and the auger housing 100 . ) is formed as a second communication passage 262 formed on the sidewall of the ogre wing receiving portion 120 .

The expansion auger assembly (A) constituting the expansion auger device according to the present invention, as shown in FIG. 8, a pair of auger wings 200 are rotated to the auger housing 100 through each hinge pin 310 It may be configured as possible, and other configurations are the same as those described above, so a detailed description thereof will be omitted.

Expansion auger device according to the present invention configured as described above, without a separate mechanical configuration for expanding the auger wing 200, the auger wing 300 is expanded with the same operation (turning in one direction while pressing) as in general drilling. It can be perforated, and the auger wing 200 can be automatically folded and recovered by contact with gravity or the lower part of the perforation hole narrower than the perforation hole while moving upward without the need for a separate mechanical operation even during recovery.

Next, it will be described in detail with reference to FIGS. 9 to 10 with respect to the expansion hole pile construction method using the expansion hole auger device according to the present invention.

9 to 10 are views schematically showing the construction process of the diaphragm pile using the diaphragm auger device according to the present invention.

Figure 9 (a) is a cross-sectional view to form a drilling hole by mounting a general auger without a drilling function at the bottom of the excavation rod 10, Figure 9 (b) is a drilling auger device of the present invention after removing the general auger This is the stage where the ogre wing is not unfolded in the installed state. Figure 9 (c) is a state in which the auger wing 200 of the expansion auger device is unfolded to form an expansion hole, and in Figure 9 (d) is an injection material 420 after the completion of the expansion hole drilling and the expansion auger device is removed. look. 9 (e) shows a state in which the construction of the expansion pile is completed by inserting the pile 400 into the expansion hole. As such, through the process of FIG. 9, the expansion pile can be constructed using the expansion auger device of the present invention.

Expansion pile construction method using a drilling auger device according to the present invention, in the drilling hole in the ground, and in the drilling pile construction method for inserting a pile of concrete material manufactured in advance at the factory into the drilling hole, in FIG. As shown, a first step of drilling the ground to a predetermined diameter to form a drilling hole to a predetermined depth; a second step of further drilling the lower end of the drilling hole to a predetermined depth with a diameter larger than the diameter of the drilling hole using the above-described drilling auger device to form a drilling hole; A third step of removing the slime under the drilling hole; a fourth step of injecting an injection material such as cement milk or mortar into the drilling hole; and a fifth step of inserting a pre-fabricated concrete pile into the drilling hole at the factory.

Expansion pile construction method using the excavation auger device of the present invention, after the completion of the first step, before the second step, or at the same time as the first step, the first to install a steel pipe casing to prevent the collapse of the wall at the same time as the drilling of the drilling hole -1 step; may further include.

Here, the present invention can apply the SDA method (separated donut auger), a construction method in which the drilling hole is drilled with a general auger, and at the same time, the steel pipe casing provided with a ring bit at the tip is rotated in the opposite direction. That is, if necessary, the first step and the first step 1-1 may be performed simultaneously.

Execution of the second step is, after the completion of the first step and before the start of the second step, after the formation of the drilling hole, the general auger without the drilling function at the bottom of the excavation rod is replaced with the drilling auger assembly (A), or the general hammer bit is replaced with the above This can be done by replacing the bore auger assembly (A).

In addition, the execution of the second step is, after the completion of the first step, the excavation rod and the general auger (general hammer bit) used when forming the drilling hole, the excavation rod and the drilling auger assembly (A) having a slime blocking means including It can be implemented by replacing it with an diaphragm auger device.

In the third step, the perforation hole and the slime generated when the drilling hole is drilled is discharged to the upper part using a screw and compressed air provided in the excavation rod at the same time as the drilling. The slime remaining on the bottom of the drilling hole can be discharged by spraying air immediately after the drilling of the drilling hole is finished.

In addition, when the slime is discharged in the third step, the slime blocking means described above allows the upward movement of the slime when the air is sprayed from the diaphragm auger device, and when the air injection is stopped, the downward movement due to free fall is blocked. .

In addition, the fifth step may be made after providing a spacer means for spacing a predetermined distance between the lower end of the drilling hole and the lower end of the pile at the lower end of the concrete pile.

The separation means 410 may be composed of a coupling plate 411 and a support 412 having the upper end supporting the pile 400, and a bracket 413 firmly connecting them, as shown in FIG. there is. Here, as shown in (b) of FIG. 10 , a separate lower support plate 414 may also be provided at the lower end of the support 412 .

The spacing means and the lower end of the pile 400 may be coupled by welding or bolting.

By providing the spacing means as described above, the load at the bottom of the pile is evenly distributed over the entire bottom area of the lower part of the drilling hole, and the injection material (cement milk or mortar) etc.) to harden.

In addition, frictional force enhancing means formed of irregularities and/or protrusions may be further formed on the outer peripheral surface of the lower end of the pile to more evenly transmit the load of the pile to the ground through the injection material.

Continuing, the present invention may further include; after the fifth step, a sixth step of hitting the top of the pile in the downward direction several times.

The pile 400 can use a concrete pile produced in a normal factory, and if necessary, a steel pipe pile and a composite pile combining steel pipe and concrete can also be applied in the same way.

According to the expansion auger device and the expansion pile construction method using the same according to the present invention as described above, the expansion of the auger wing for the expansion drilling work and the folding of the auger wing for recovery can be performed without a separate mechanical configuration, Even if the winger wing is not completely folded due to its own weight when recovering the winger, it can be folded naturally by being caught at the bottom of the drilling hole when lifting the excavation rod, thereby eliminating malfunctions in the recovery stage. There is an advantage in that workability can be improved because there is no need to concentrate.

In addition, according to the present invention, it is possible to expand and fold the auger wing while having a simple structure, thereby securing functionality and manufacturability. Since it is provided and can be expanded and folded, there is an advantage that can increase the expansion ratio.

In addition, the present invention does not require a separate complicated mechanical device for expanding the auger wing, so the air passage inside the excavation rod can be fully used, and only the excavation auger device is an excavation rod without a separate equipment modification to perform the unfolding and folding function It has the advantage of securing applicability because it can be easily replaced and installed at the bottom of the .

The embodiments described in this specification and the accompanying drawings are merely illustrative of some of the technical ideas included in the present invention. Accordingly, since the embodiments disclosed in the present specification are for explanation rather than limitation of the technical spirit of the present invention, it is obvious that the scope of the technical spirit of the present invention is not limited by these embodiments. Modifications and specific embodiments that can be easily inferred by those skilled in the art within the scope of the technical spirit included in the specification and drawings of the present invention should be interpreted as being included in the scope of the present invention.

The present invention is used for drilling by expanding the diameter of the lower end of the drilling hole in the hard ground.

Claims

In the drilling auger device detachably coupled to the excavation rod of the drilling equipment,

A connection part formed at the upper end to be connected to the lower end of the excavation rod, an auger wing receiving part formed on the front surface of the lower end to receive the following auger wing, a hinge pin receiving hole for preventing the detachment of the hinge pin, and air and injection material therein auger housing comprising a through hole formed as a movement path of the auger housing, the outer diameter of which is less than or equal to the inner diameter of the perforated hole;

An auger wing coupling portion fitted to the auger wing receiving portion of the auger housing, a hinge pin through hole through which a hinge pin for preventing separation from the auger housing passes, and an auger wing protrusion protruding out of the outer diameter of the auger housing a pair of ogre wings comprising;

a hinge pin passing through the hinge pin through hole and coupled to the hinge pin receiving hole to prevent separation of the auger wing and the auger housing; and

A plurality of auger tips provided on the front surface of the auger wing to crush the ground; includes,

The ogre wing receiving portion is a first ogre wing receiving portion that is formed to transmit the rotational force and downward pressing force in the unfolded state of the auger wing, and the central portion to increase the resistance to the rotational force even in the process of unfolding the auger wing. Including a second auger wing receiving portion that is formed deeper than the first auger wing receiving portion,

The ogre wing coupling part of the ogre wing includes a second ogre wing coupling part formed to correspond to the first ogre wing receiving part, and a first ogre wing coupling part formed to correspond to the second ogre wing receiving part,

The second auger wing accommodating part, one oger wing accommodating part for accommodating the first ogre wing coupling part of one of the pair of auger wings, and the other auger for accommodating the first ogre wing coupling part of the other auger wing When the wing receiving part is viewed in a plan view, the width of the one ogre wing accommodating part and the other ogre wing accommodating part are formed to be different from each other with respect to the longitudinal central axis of the hinge pin, the one oger wing accommodating part and the other ogre wing accommodating part are formed. The widths formed relatively large in each are made to be formed on opposite sides of each other, and the second auger wing receiving part is formed with a side wall part that faces a part of the side of each of the first auger wing coupling parts, so that the first auger Both side surfaces of each of the wing coupling parts are made to be supported in the second auger wing receiving part,

When the steel pipe casing to prevent the collapse of the hole wall is installed at the same time as the drilling of the drilling hole in the ground or rock, when it touches the lower part of the drilling hole to form the drilling hole at the bottom of the drilling hole, it rotates around the hinge pin and unfolds a pair of auger wings The auger wing protrusion extends to the outside of the outer diameter of the drilling hole, characterized in that by drilling the ground with an outer diameter wider than the outer diameter of the perforated hole to form a drilling hole

Drilling Auger Device.
According to claim 1,

The pair of auger wings are provided to be spread out in opposite directions, and a single hinge pin passing through all of the hinge pin through holes is configured to prevent separation of the auger wing and the auger housing.

Drilling Auger Device.
According to claim 1,

The auger wing coupling portion,

A first ogre wing coupling bottom surface in contact with the bottom surface of the second auger wing receiving part which is flat, and a second auger wing coupling part bottom surface in contact with the bottom surface of the second auger wing receiving part by rotating at a predetermined angle, the first A curved surface is formed between the ogre wing coupling bottom surface and the second auger wing coupling bottom surface, and the first ogre wing coupling bottom surface and the second auger wing coupling bottom surface are on the bottom surface of the second ogre wing receiving part around the hinge pin. characterized in that it is made to limit the rotation of the auger wing within the contact range

Drilling Auger Device.
In the drilling pile construction method in which a drilling hole is formed by drilling the ground, and an expansion hole is formed at the lowermost end of the drilling hole to insert and fix a concrete pile,

A first step of drilling the ground to a predetermined diameter to form a drilling hole to a predetermined depth;

A second step of forming a drilling hole by additionally drilling to a predetermined depth with a diameter larger than the diameter of the drilling hole at the lower end of the drilling hole using the drilling auger device according to any one of claims 1, 2 and 3;

a third step of removing the slime under the drilling hole;

a fourth step of injecting an injection material into the drilling hole;

A fifth step of inserting a pre-fabricated concrete pile into the drilling hole; characterized in that it comprises

How to construct an excavation pile.
5. The method of claim 4,

Step 1-1 of installing a steel pipe casing to prevent collapse of the hollow wall at the same time as the drilling of the drilling hole; characterized in that it further comprises

How to construct an excavation pile.
5. The method of claim 4,

The second step is

After completing the first step, after forming the drilling hole, a 2-2 step of replacing a general auger without a drilling function at the bottom of the excavation rod with the drilling auger device, or replacing a general hammer bit with the drilling auger device; characterized in that it further comprises

How to construct an excavation pile.
5. The method of claim 4,

After the completion of the fifth step, a sixth step of hitting the top of the pile in the downward direction a plurality of times; characterized in that it further comprises

How to construct an excavation pile.
5. The method of claim 4,

The fifth step is characterized in that it is carried out after providing a spacer means for spacing a predetermined distance between the bottom of the drilling hole and the bottom of the pile at the bottom of the concrete pile

How to construct an excavation pile.