KR101299643B1 - Apparatus for drilling a pile hole - Google Patents

Abstract

The present invention is to provide a method and a device for drilling boring holes for basic construction to improve the bearing capacity of the pile tip by drilling the expansion hole to the outside of the bottom of the pile hole to correspond to the shape of the tip of the pile disposed in the tip portion It is about.
In the drilling method of the present invention, the auger is rotated to drill a pile hole in the ground, and after the blade portion protrudes outwardly from the auger, the blade part disposed to be protruded to the outside of the auger is rotated. Rotating the blade unit in cooperation with the blade to form an expansion hole in the lower portion of the pile hole, after the expansion hole is formed, the blade portion is introduced into the interior of the auger and the auger is separated from the pile hole.

Description

Pile punching device for basic construction {APPARATUS FOR DRILLING A PILE HOLE}

The present invention relates to a pile drilling machine for basic construction, and in particular, by reinforcing the expansion hole on the lower portion of the pile hole outward so that the reinforcement shoe corresponds to the shape of the pile disposed on the tip portion, it is improved to increase the bearing capacity of the pile tip portion The present invention relates to a pile drilling machine.

In general, in the construction of various buildings, piles are press-fitted on the soft ground in order to solidify the foundation.

The construction cases of pile foundations are increasing according to the trend of high-rise, large-scale and weight of urban structures, and the need for pre-drilling embedding method is increasing as the low vibration / noise method is required due to the strengthening of environmental requirements and regulatory standards. .

Pile construction is one of the most important basic works of building construction. If pile method is classified according to construction method, it can be classified into type method (injection method), embedding method, and site casting method.

Type method is a method that has been traditionally used to hit the pile directly on the ground.

The embedding method is a method in which the pile made in the factory is drilled into the perforated hole after the ground is drilled and the pile head is struck and the cement fixative is injected around the pile. This embedding method was developed to solve the problem of noise and vibration generated during the construction of the type pile, including SIP (soil-cement injected precast pile), SAIP (special auger SIP), and SDA (seperated doughnut auger) , Quick drilling, PRD (percussion rotary drill), and the like.

The use of this purchase method has increased rapidly since the publication of the Noise and Vibration Control Act in 1994, and it has recently been used in most sites except for special cases such as coastal areas where there are no civil complaints caused by noise and vibration.

There are two types of piles for driving: steel piles and concrete piles (hereinafter referred to as 'PHC piles'). Prestressed Spun High Strength Concrete Piles are provided. There are general concrete piles made by pouring concrete, and high-strength piles made by placing tension muscles inside, pouring concrete and forcibly tensioning them to introduce stress and rapidly curing under stress conditions.

Recently, high strength piles are used which are much higher than ordinary concrete piles, and ordinary concrete piles are gradually being used except for lightweight construction.

Before the construction of the pile in the ground using the auger, the excavation equipment to drill the pile hole must be preceded in order to reduce the operation noise generated during navigation.

Figure 1 shows the overall configuration of a conventional excavator equipment. According to Figure 1, the basic construction pile construction equipment is connected to the lifting crane installed on the top of the crane (1), the reader 2 installed vertically to the crane (1), the reader (2), the reader (2) It includes an auger drive unit (3) guided to), an auger (4) connected downwardly to the auger drive unit (3).

The auger 4 forms a screw portion 6 on the outer periphery of the rod 5, which is a steel pipe, and has a bit 7, which is an excavation head, at the lower end thereof. Therefore, the auger 4 connected to the auger drive unit 3 rotates, and when the bit 7, which is an excavation head installed at its end, rotates along, the ground is excavated and drilled.

Excavated soil excavated by the bit (7) is discharged to the ground by being mounted on the screw portion (6) in the opposite direction of rotation of the auger (4). When the pile ball is formed to a predetermined depth, the auger 4 is reversely rotated to be withdrawn from the pile ball by reverse operation of the auger drive unit 3, and the PC or RC pile or steel pipe is introduced and embedded through the pile ball. will be.

At this time, the mortar is injected before the embedding is buried or the final pile is driven by the drop hammer after the pulling, so that the pile is firmly supported. However, in the excavation work of such auger (4) has the following problems.

First, after the auger is drilled, the soil remaining on the auger's wings will loosen at the tip of the concrete pile, forming a slime, which reduces the support capacity of the concrete pile.

Second, even if the support portion protruding from both sides is formed in the tip portion of the pile to reinforce the support force of the pile tip, the internal shape of the pile hole can not be punctured to correspond to the shape of the pile tip, there is a disadvantage that a blank portion occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has the following purpose.

First, it is an object of the present invention to provide an improved construction method for drilling holes and foundations for the foundation construction so as to form an expansion hole corresponding to the support projecting to the tip portion of the pile when the auger is drilled.

Secondly, by forming the pile pile and the expansion hole of the ground in a shape corresponding to the shape of the tip of the pile, the improved pile drilling method and apparatus for foundation work to increase the contact area of the pile to improve the bearing capacity of the pile The purpose is to provide.

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The fabric mill of the present invention basic construction pile hole to achieve the above object, the auger is formed inside the hollow and the outgoing hole is formed in communication with the hollow around the outer peripheral surface of the distal end portion, and the elevating means through the lifting means inside the hollow of the auger A perforated member that is possibly accommodated, and at least one blade portion pivotally coupled to an end of the perforated member, the at least one blade portion being retractably disposed from the exit hole of the auger during the lifting operation of the perforated member,
The punching member is composed of an upper connection portion formed in a rod shape at the upper portion and a lower connection portion connected to the outer circumferential surface of the blade portion at the lower portion thereof, and a bearing for guiding rotation of the lower connection portion is built in the connection portion of the lower connection portion and the upper connection portion. It is configured to be configured to form an expansion hole on the lower side of the pile hole when the auger pile hole is drilled outward.

Lifting means of the present invention is provided with a hydraulic cylinder for supplying a hydraulic force for the lifting of the punching member.

Preferably, the auger is formed with a guide portion for guiding the operation of the blade portion on the lower surface of the hollow.

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First, by arranging the drilling member and the blade portion for drilling the expansion hole inside the auger, it is possible to drill the expansion hole to the outside in the lower portion of the pile hole with a simple configuration.

Secondly, as the pile hole and the expansion hole are formed together, it has a useful effect of increasing the bearing area of the pile tip by increasing the contact area where the tip portion of the pile in which the reinforcing shoe is installed is in contact.

1 is a view showing a conventional ground drilling equipment.
Figure 2 is a flow chart sequentially showing a method of drilling a basic public file pile according to the present invention.
Figure 3 is a perspective view showing the configuration of a punching device for a basic construction pile hole according to the present invention.
4 is a joint state view of Fig.
5 is a plan view showing a coupling state of the blade unit and the auger of the present invention.
Figure 6 is a use state showing the state in which the punching member of the present invention is lowered operation protrudes the blade portion to the outside of the hole.
7 is a view showing a state in which the pile hole and the expansion hole is formed after the auger and the drilling member of the present invention is raised.
8 is a use state diagram showing a state that the file is entered into the file hole and expansion hole of the present invention.

The present invention is improved by forming an expansion hole that extends outwardly in the lower portion of the pile hole when the auger pile hole is drilled, so that the supporting force of the pile tip can be stably secured due to a hole corresponding to the shape of the tip of the pile.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the drilling method of the basic construction pile hole according to the present invention, when described with reference to Figure 2, the auger is rotated to drill the pile hole in the ground (S1), the blade disposed to be protruded outward on the tip of the auger After protruding the portion to the outside of the auger (S2), by forming the expansion hole (H1) in the lower portion of the pile hole by rotating the blade unit in conjunction with the rotation of the auger during rotation of the auger (S3), After the formation of H1), the blade unit is led back into the auger and the auger is separated from the pile hole (S4).

In the step S3 of forming the expansion hole H1, the blade part is formed to the outside of the pile hole by a portion protruding to the outside of the auger.

In addition, to rotate the blade portion, it may be rotated using a separate motor, but the configuration for this is complicated, it is preferable to rotate so as to interlock with the rotation of the auger.

Referring to Figure 3 to Figure 7, the basic construction pile hole fabrication factory according to the present invention is a hollow 15 is formed therein and a plurality of projection holes 12 are formed in communication with the hollow 15 around the outer peripheral surface of the front end portion is formed An auger 10 having a bit 7 disposed at its tip, a punching member 20 accommodated in a hollow 15 of the auger 10 via a lifting means, and an end portion of the punching member 20. It is composed of at least one blade portion 25 is coupled to the pin 26 so as to be rotatable in the end portion from the hauling hole 12 of the auger 10 in the lifting operation of the punching member 20 so that the end portion can be projected. .

In more detail, a plurality of abutting holes 12 of the auger 10 are formed around the outer circumferential surface of the distal end of the auger 10, and are formed in a downwardly inclined structure for the appearance of the blade portion 25.

In addition to the auger 10, referring to FIG. 3, and referring again to FIG. 1, a screw part 6 is formed along the outer circumferential surface of the rod 5, and the auger 10 is rotationally driven by the auger drive unit 3. The ground pile hole (H) is to be bored, and the hollow 15 is formed therein so that the boring member 20 is accommodated in the auger 10.

Lifting means is provided on the upper side of the drilling member 20 is provided with a hydraulic cylinder 40 for providing the lifting force to the drilling member 20.

The punching member 20 is composed of an upper connecting portion 22 formed in the shape of a rod on the upper portion, and a lower connecting portion 24 connected to the outer circumferential surface of the blade portion 25 at the lower portion thereof.

In addition, the punching member 20 is connected to the upper connection portion 22 to be moved up and down by the hydraulic force of the hydraulic cylinder (40).

The perforating member 20 may be disposed so that the upper connecting portion 22 is rotatable in the lower portion of the hydraulic cylinder 40 so that the entire part is rotated, but the rotation force of the auger 10 is lowered to the lower connecting portion 24 in the blade portion ( Passed through 25) only the lower connector 24 is rotatably connected.

When only the lower connector 24 is rotated, it is preferable that the bearing 30 for guiding the rotation of the lower connector 24 is embedded in the connection portion between the lower connector 24 and the upper connector 22.

The blade portion 25 is accommodated so as to be retracted in each of the plurality of recessed holes 12, the bracket 27 is disposed spaced apart from each other at the lower end of the punching member 20 and disposed around the outer circumferential surface of the lower connector 24 And a pin 26 to be pivotally connected.

In addition, the auger 10 is formed on the lower surface of the hollow 15, the guide portion 14 for guiding the appearance of the blade portion 25 is formed.

Guide portion 14 is formed in a trapezoidal cross-sectional structure having a slope and narrowed toward the top in order to guide the appearance operation of the blade portion 25.

Referring to the operation of the punching device of the present invention having such a configuration as follows.

The foundation work pile drilling machine according to the present invention rotates the auger 10 in the ground to form a pile hole H, and the drilling member 20 accommodated in the auger 10 inside the pile before entering the pile. The lowering operation is performed by the hydraulic cylinder 40.

In the lowering operation of the punching member 20, an end portion of the blade portion 25 connected to the pin 26 to the lower connector 24 protrudes outwardly from the hole 12.

At this time, the blade portion 25, one end of the blade portion 25 is in contact with the inclined surface of the guide portion 14 by its own weight before the drilling member 20 is lowered, the blade portion after the lowering of the drilling member 20 The other end of 25 is protruded to the outside of the hole 12 while opening to the outside along the inclined surface of the guide portion 14 with respect to the pin 26.

Subsequently, when the auger 10 rotates, an end portion of the blade portion 25 protruding outwardly from the hole 12 is interlocked to form an expansion hole H1 outside the lower portion of the pile hole H.

At this time, the blade portion 25 performs the function of the rotary blade for drilling the expansion hole (H1) by rotating the lower connector 24 together when the auger 10 is rotated.

After the expansion hole H1 is formed, the perforated member 20 is lifted back to its original position and the end of the blade portion 25 is introduced into the recessed hole 12.

As a result, one end of the blade portion 25 is not protruded outward and is accommodated in the hole 12, so that the auger 10 does not interfere with the inner wall surface of the pile hole H when the auger 10 is raised.

Thereafter, when the auger 10 is lifted up and separated from the pile hole H, the pile hole H maintains a state in which the expansion hole H1 is formed outward at a lower portion formed vertically.

On the other hand, the process of entering the pile into the pile hole (H) is formed expansion hole (H1), referring to Figure 8, the conical tip shoe 210 is coupled to the tip, the cylindrical band 220 on the outer peripheral surface of the tip Is coupled to protrude, is coupled to the front end of the band 220 is rotatably coupled to the pile 200 by employing a pile 200 is arranged a plurality of reinforcement shoes 300 rotated in the outward direction of the band 220 It enters into the pile ball (H).

After the reinforcement shoe 300 enters the lower portion of the pile hole H, the reinforcing shoe 300 is rotated outward and disposed in the expansion hole H1.

Thus, the tip end of the pile 200 is in contact with the tip shoe 210 of the pile 200 to the bottom surface of the pile hole (H), the reinforcement shoe 300 is in contact with the expansion hole (H1) Increase your support.

Description of the Related Art [0002]
10: Auger 12: Haunted
14: guide portion 15: hollow
20: punched member 22: upper connecting portion
24: lower connector 25: blade portion
26: pin 27: bracket
30: bearing 40: hydraulic cylinder
200: File 210: Tip shoe
220: band 300: reinforcement shoe
H: Pile ball H1: Expansion ball

Claims (5)

delete An auger 10 having a hollow 15 formed therein and a concave hole 12 communicating with the hollow 15 around the outer circumferential surface of the distal end portion;
A punching member 20 accommodated in a hollow 15 of the auger 10 via a lifting means;
At least one or more pins 26 rotatably coupled to an end of the punching member 20 and an end of the punching member 20 may be projected from an exit hole 12 of the auger 10 in a lifting operation of the punching member 20. Having a blade portion 25,
The punching member 20 is composed of an upper connecting portion 22 formed in the form of a rod on the upper portion, and a lower connecting portion 24 connected to the outer peripheral surface of the blade portion 25 at the lower portion, the lower connecting portion 24 and the upper portion By configuring the bearing 30 for guiding the rotation of the lower connector 24 in the connection portion of the connection portion 22,
Drilling device of the foundation public file pile, characterized in that to form an expansion hole (H1) to the outside in the lower portion of the pile hole (H) when drilling the pile hole (H) of the auger (10). 3. The drilling device for a foundation public file hole according to claim 2, wherein the elevating means has a hydraulic cylinder (40) for supplying a hydraulic force for elevating the drilling member (20). According to claim 2, The auger 10 is a perforation of the foundation public pile file, characterized in that the guide portion 14 for guiding the indentation operation of the blade portion 25 is formed on the lower surface of the hollow 15 Device. delete

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