WO2019054678A1

WO2019054678A1 - Pile head reinforcing structure using excavation bit, which enables multi-stage reaming and to which non-welded casing coupler is applied, and pile construction method using same

Info

Publication number: WO2019054678A1
Application number: PCT/KR2018/010190
Authority: WO
Inventors: 계진태
Original assignee: (주)씨엔피텍; 계진태; 김홍연; 정인욱; 여규권
Priority date: 2017-09-14
Filing date: 2018-09-03
Publication date: 2019-03-21
Also published as: KR101871118B1

Abstract

The present invention relates to a pile head reinforcing structure using an excavation bit, which enables multi-stage reaming and to which a non-welded casing coupler is applied, and a pile construction method using the same, the structure and the method: mounting a non-welded casing coupler to the excavation bit, which enables multi-stage reaming, so as to perform boring and insert a casing at the same time, thereby promoting the simplicity and rapidity of construction; enabling the plurality of casings to be connected or separated by means of the coupler, thereby resolving problems caused by the welding and cutting of the casings during construction; and coupling a head reinforcement to the upper part of a pile without welding and burying the same in concrete of a foundation part so as to disperse a pullout load and a vertical load and relieve stress concentration, thereby enabling the stable foundation part for supporting an upper structure to be formed.

Description

Pile head reinforcement structure using excavation bit capable of multistage expansion using welded casing coupler and file construction method using it

The present invention is characterized in that a weldless casing coupler is mounted on a drilling bit capable of multi-stage expansion, and the casing is inserted at the same time as the drilling, so that a plurality of casings can be connected or separated through a coupler while simplifying and quick- It solves the problems caused by welding and cutting, and also prevents the stress concentration phenomenon by distributing the vertical load together with the pullout load by making the head reinforcement body to be buried in the concrete of the foundation by joining the head reinforcement body to the upper part of the pile. The present invention relates to a pile head reinforcement structure using a drill bit capable of multi-stage expansion using a weldless casing coupler that can form a stable base portion for supporting an upper structure, and a pile construction method using the same.

In general, when a building or structure is erected, foundation work is performed to reinforce the ground in order to support the upper structure according to the condition of the ground or the load of the structure.

At this time, when the ground is soft ground, to prevent subsidence of the ground, it is necessary to strengthen the ground by carrying out the file construction or the improvement of the ground.

The file to be installed on the soft ground is classified into a steel pipe file, a PC file, a PHC file, etc. according to the material thereof, and is classified into a steel pipe file, a tubular type file, an H-shaped steel pipe file, The tubular file is generally used.

In addition, microfiles of small diameter piles are used for basic reinforcement works of existing buildings, or for basic reinforcement work in narrow areas where large excavation equipment is not available.

The micro pile is usually a file with a diameter of 250 mm or less and can support a large load with a small diameter hole using small equipment as compared with a general tubular file. Since the micro pile is small in diameter, It is advantageous that it can be installed at any angle from horizontal to horizontal.

The microfibers have a structure in which a core having threads formed thereon for supporting the body supports the body. More specifically, the microfibers include a thread bar in which spiral coupling protrusions are continuously and repeatedly formed on the body outer surface, A centralizer coupled to an outer surface of the tread bar to maintain a center of the tread bar inserted into the pile hole, a centralizer coupled to the upper and lower ends of the tread bar to couple the tread bars adjacent to each other, And the grout is supplied to the perforation hole to be cured and cured.

Specifically, as for general construction,

First, a drilling hole is drilled using a drilling rig, that is, a drilling hole is drilled, a bit for excavation is removed, a casing is press-fitted, and a fixation hole for stably fixing a microfilm is drilled at a lower end of the drilling hole, There is a problem due to the complexity and delay of the process due to the process of removing the excavating bit, installing and grouting the file, and forming the head reinforcement,

Furthermore, the depth of the perforation hole is unexpectedly drastically deeper, or the length of the casing due to the thin excavation is controlled by welding or cutting, which causes delays in construction and inconvenience.

Conventionally, a perforation hole formed in the upper surface of the foundation concrete is provided with a head reinforcement for reinforcing a file assembled on the ground. The pile is continuously formed on the outer circumferential surface of the steel bar, And a lock nut, a plate, a coupler, a plate, a coupler, a plate, and a lock nut in this order. When the head reinforcement is installed in the perforation hole, an unshrunk mortar grout material is injected around the perforation hole to complete a pile foundation do.

However, in the prior art, there is a technical limitation on the basic concrete supporting force by using a small-diameter file when a large-sized file is installed on the foundation concrete and the ground and the foundation is still vulnerable to the punching shear by the file. Therefore, it is necessary to develop a technique that can prevent the settlement of the foundation concrete and increase the supporting capacity of the foundation, because it can damage the supporting force of the foundation concrete in the process of installing a large number of files on the foundation concrete.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems,

First, the welded casing coupler is mounted on a drilling bit capable of multi-stage expansion. By inserting the casing at the same time as the drilling, it is possible to connect and detach a plurality of casings through a coupler while facilitating the construction and quickness. And to solve the problems caused by the cutting, and it is an object of the present invention,

Second, the head reinforcement is joined to the upper part of the pile by welding, so that it is buried in the concrete of the foundation part. In addition, the vertical load is dispersed along with the pulling load, thereby relieving stress concentration phenomenon. Another object of the present invention is to provide a stable base portion,

Third, by inserting the casing into the excavation bit capable of multi-stage expansion, it is possible to drill the perforation hole and to make more than a plurality of drilling tools at the lower end of the perforation hole. In addition to the speed and simplicity of the process, Another object of the present invention is to solve the problem.

In order to achieve the above object,

"Coupled to the outer periphery of the casing at the upper and lower ends so that the casing can be connected and coupled at the upper and lower ends according to the depth corresponding to the depth of penetration of the perforation hole by being coupled to the outer periphery of the drilling bit capable of multi- And a pile reinforcing member formed at a top end of the casing, the pile reinforcing member being inserted through the center of the casing and having an extension plate integrally formed at a lower end thereof,

The excavation bit capable of multi-stage expansion has an advanced excavation surface formed on the bottom, and a rotation cam having an outer circumferential surface alternating with the cam protrusion and the cam groove is integrally formed at the center of the upper surface. A pair of fastening holes are formed at predetermined positions near the lower and rear ends of the outer circumferential surface of a cylindrical member to be detachably attached to the upper surface of the bit body, And a shoulder drive unit having a shoulder hole pierced in a state of maintaining an interval between the upper and lower surfaces and a rotating shaft member coupled to an upper surface of the shoulder drive unit. Wow,

A drilling hole drilling step of drilling a drilling hole using a drilling bit capable of multi-step drilling, wherein the drilling hole is drilled in the depth of the drilling hole by coupling the casing to the outer circumference of the drilling hole; A cement grout material injection step of injecting and curing a cement grout material to the outside of the press-fitted casing in a state of removing the excavating bit, which is the excavation equipment, and a cement material grout material injection step after the grout material injection step A step of installing a head reinforcement member for installing a head reinforcement member on a casing protruding from the ground surface, and a step of installing the head reinforcement member and assembling the basic reinforcing bar and curing the concrete by curing the concrete.

In the drilling of the perforation hole, the extension connection of the casing for excavating the perforation hole may be naturally performed when the new casing to be connected to the upper end of the casing exposed near to the ground is seated, A plurality of first coupling grooves formed on the outer circumferential surface are maintained at constant intervals and in such a state, the coupler is mounted on a central outer circumferential surface of the boundary line of each of the casings so as to coincide with a single or a plurality of second coupling grooves formed on the inner circumferential surface of the coupler And a wire is inserted into the first fastening groove and the second fastening groove through the through hole and the upper and lower ends of the casing are coupled to each other to be extended so as to be able to be extended. Purpose can be achieved.

In the present invention constructed as described above, a plurality of casings can be connected or disconnected through a coupler while mounting the casing in a drilling bit capable of multi-stage expansion by inserting the casing without welding, It is possible to solve the problems caused by the welding and cutting of the casing at the time of construction,

In addition, since the head reinforcement is joined to the top of the pile by welding, the vertical load is dispersed along with the pullout load, thereby relieving the stress concentration phenomenon. As a result, A stable base portion can be formed,

In addition, it is possible to drill a perforation hole by inserting a casing into a drilling bit capable of multi-stage expansion and to allow a plurality of drilling tools to be drilled at the lower end of the drilling hole, and to perform the complicated process at once, It is to exert its effect.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic perspective view of a drill bit in a pile head reinforcement structure using a drilling bit capable of multi-stage expansion using a weldless casing coupler according to the present invention;

FIG. 2 is an exploded perspective view of a drill bit in a pile head reinforcement structure using a drilling bit capable of multistage expansion using the weldless casing coupler of the present invention.

3 is a fragmentary perspective view of a drill bit in a pile head reinforcement structure using a drilling bit capable of multistage expansion using the weldless casing coupler of the present invention,

FIG. 4 is an operational state view showing a state in which a shoulder protrusion for excavation is pulled out from a drill bit in a pile head reinforcement structure using a drill bit capable of multi-stage expansion using a weldless casing coupler according to the present invention;

FIG. 5 is an operational state view showing a state in which a shoulder projection for excavation is pulled in a drill bit in a pile head reinforcement structure using a drill bit capable of multi-stage expansion using a weldless casing coupler according to the present invention;

FIG. 6 is a view showing a state in which a shoulder projection due to rotation of a rotation cam is pulled out from a drill bit in a pile head reinforcement structure using a drilling bit capable of multistage expansion using the weldless casing coupler of the present invention,

FIG. 7 is a view showing a state in which a shoulder projection due to rotation of a rotation cam is pulled in a drill bit in a pile head reinforcing structure using a drilling bit capable of multistage expansion using the weldless casing coupler of the present invention,

FIG. 8 is a perspective view of a pile head reinforcement structure using a drilling bit capable of multi-stage expansion using a weldless casing coupler according to the present invention, in which a plurality of casings are connected by a coupler,

FIG. 9 is an exploded perspective view of a plurality of casings and a coupler in a pile head reinforcement structure using a drilling bit capable of multistage expansion using the weldless casing coupler according to the present invention.

10 is a cross-sectional view illustrating a pile head reinforcement structure using a drilling bit capable of multi-stage expansion using a weldless casing coupler according to the present invention, in which wires are inserted and coupled through a through hole when a plurality of casings are connected by a coupler.

11 is a sectional view of a pile head reinforcement structure using a drilling bit capable of multi-stage expansion using a welded casing coupler according to the present invention, in which a plurality of casings are connected by a coupler,

FIG. 12 is a perspective view of a pile head reinforcement structure using a drilling bit capable of multi-stage expansion using a weldless casing coupler according to the present invention in a state where a pile, a casing, a coupler,

FIG. 13 is a perspective view of a pile-head reinforcing structure using a drilling bit capable of multi-stage expansion using a weldless casing coupler according to the present invention, in which a pile to which a casing and a coupler are coupled and a head reinforcement are separated;

FIG. 14 is an exploded perspective view of a head reinforcement member in a pile head reinforcement structure using a drilling bit capable of multi-stage expansion using a weldless casing coupler according to the present invention;

15 is a sectional view of a head reinforcement member in a pile head reinforcement structure using a drill bit capable of multistage expansion using the weldless casing coupler of the present invention.

16 is a flowchart of a file construction method according to the present invention,

17 is a flowchart of another embodiment of the file construction method of the present invention,

FIG. 18 is a sectional view of a pile head reinforcement structure using a drilling bit capable of multi-stage expansion using the welded casing coupler of the present invention, and a pile construction method using the same,

FIG. 19 is a sectional view of a pile head reinforcement structure using a drilling bit capable of multi-stage expansion using a weldless casing coupler according to the present invention, and a completed pile foundation concrete and a grouting material,

FIG. 20 is a perspective view showing a pile head reinforcement structure using a drill bit capable of multi-stage expansion using the weldless casing coupler according to the present invention, and a casing shoe coupled to the lowermost stage of the casing,

21 is a pile head reinforcement structure using a drill bit capable of multi-stage expansion using a weldless casing coupler according to the present invention, and a pile construction method using the pile head reinforcement structure, wherein the casing is press-fitted into a bottom surface of a perforation hole, Sectional view showing a construction method in which an extension plate of a file is provided,

FIG. 22 shows a pile head reinforcement structure using a drill bit capable of multi-stage expansion using a weldless casing coupler according to the present invention and a construction method for a pile construction method using the same, in which a fastening rod is coupled to a head reinforcement body instead of a file Sectional view.

In the best mode of the present invention,

The casing 20 is connected to the outer periphery of the excavation bit 10 by a depth corresponding to the penetration depth of the perforation hole H, A coupling 30 is fastened and coupled to an outer circumferential portion between the upper and lower casings 20 so as to be extendable and a head reinforcement 40 is formed at the upper end of the casing 20 and is inserted through the center of the casing 20, And a pile (50) integrally provided with an extension plate (500)

The drilling bit (10) capable of multi-

And a rotary cam 104 having an outer circumferential surface alternately provided with a cam protrusion 102 and a cam groove 103 is integrally formed at the center of the upper surface of the rotary cam 104, A bit body 100 having three shoulder members 105 in the longitudinal direction,

A pair of fastening holes 112 are formed at predetermined positions near the lower and rear ends of the outer circumferential surface of the cylindrical member 111 to be detachably attached to the upper surface of the bit body 100, And a shoulder driving unit 110 having a shoulder hole 113 formed in the upper and lower portions thereof with an interval maintained and a rotating shaft member 114 coupled to the upper surface thereof. And a pile head reinforcing structure using a bit for excavation.

First, a pile head reinforcement structure using a drill bit capable of multistage expansion using the weldless casing coupler of the present invention will be described.

The reference numeral 10 designates an excavation bit capable of multi-stage expansion, and the excavation bit 10 capable of multi-stage expansion is, as shown in FIGS. 1 to 3,

And a rotary cam 104 having an outer circumferential surface alternately provided with a cam protrusion 102 and a cam groove 103 is integrally formed at the center of the upper surface of the rotary cam 104, And a cylindrical member 111 which is fastened to the upper surface of the bit body 100 so as to be detachable from the upper and lower surfaces of the outer circumferential surface of the outer circumferential surface of the cylindrical member 111, A shoulder hole 113 is formed in the upper surface of the fastening hole 112 in a state where the upper and lower circumferential surfaces of the fastening hole 112 are spaced apart from each other, And a shoulder driving unit 110 to which the shoulder driving unit 110 is coupled.

As shown in FIGS. 4 and 6, in the drilling bit 10 having the above-described configuration, when drilling the perforation hole H by engaging the casing 20 described later with the outer circumferential portion, The shoulder drive unit 110 coupled to the shoulder drive unit 110 is generally driven to perforate the perforation hole H and the perforation hole H is formed in the pile 50, The casing plate 20 or the casing shoe 60 to be described below is stably inserted or pressed into the casing 20 so as to be seated on the bottom surface of the perforation hole H, The extension plate 500 integrally formed at the lower end of the pile 50 is inserted into the punch hole H to be positioned at a predetermined distance from the upper end of the extension plate 500 and the casing 20 (10) of the excavating bit (10) The engaging shoulder protrusion 106 of the shoulder member 105 protrudes to the outer periphery and the lower end of the perforation hole H or the predetermined inner periphery of the perforation hole H In the same way,

Next, the reference numeral 20 designates a casing, and the casing 20, as shown in Figs. 8 to 11,

The drill bit H is connected to the outer circumference of the drilling bit 10 so as to be penetrated in the depth of the drilling hole H and can be connected to the upper and lower ends by a depth corresponding to the depth of penetration of the drilling hole H However,

The casing 20 has a single or a plurality of first fastening recesses 200 formed on the upper and lower outer circumferential surfaces of the casing 20, The first fastening groove 300 and the second fastening groove 300 are formed in the first fastening groove 200 and the second fastening groove 300 through the through hole 301 formed in one side of the second fastening groove 300, And the upper and lower casings 20 are connected and coupled to each other.

The coupling 30 is fastened to the outer circumferential portion of the upper and lower casings 20 so as to extend and connect the upper and lower ends of the casing 20.

Preferably, as shown in FIG. 20, a cylindrical casing shoe 60 can be coupled to the lowermost end of the casing 20,

The casing shoe 60 is provided with a seating chin 600 on the inner circumferential surface so that the lowest end of the casing 20 can be seated and a single or a plurality of fourth coupling grooves 602 are provided on the seating chin 600 And an insertion hole 601 penetrating outward is perforated at a predetermined position of the fourth coupling groove 602 so that the first coupling groove 200 provided in the casing 20 and the fourth coupling groove 602 formed in the fourth coupling groove 602 And the casing 20 is coupled to the casing shoe 60 so that the casing 302 can be detached from the casing 20.

Next, the reference numeral 40 designates a headrest reinforcing member, and the headrest reinforcing member 40 is formed as shown in FIGS. 12 to 15 and 22,

(40) coupled to the upper end of the casing (20) by the coupling (30). Specifically, the head reinforcement (40)

The upper end of the casing 20 is connected to the coupling 30 by the coupling 30 and the lower end has a third coupling groove 401 and a cylindrical ending pipe 400 A bolt-shaped connecting rod 70 which is inserted into the center of the inside of the ending pipe 400 and which is coupled to the coupling hole 402 and has one side thereof concavely rounded, A support bracket 410 is formed at a predetermined position on the upper surface of the seating piece 412 and a supporting groove 413 is formed at a predetermined position on the other side of the seating piece 412, A through hole 421 is formed at the center to fix a plurality of locking protrusions 411 protruding into the ending pipe 400 through the fitting hole 402 of the pipe 400 in the vertical direction, And a step 422 for fixing the part 411 A nut 430 for fixing the fixing bracket 420 on the upper and lower surfaces of the fixing bracket 420 with a plurality of fixing brackets 420 interposed therebetween; A support bar 440 slidably coupled to the support bar 440 and a ring reinforcing bar 450 having a relatively small diameter and a relatively large diameter on the lower side on the outer circumferential surface of the support bar 440 to be.

That is, the bottom end of the ending tube 400 is seated at the uppermost end of the casing 20, and the first fastening groove 200 of the casing 20 and the third fastening groove 401 of the ending tube 400 are naturally spaced The coupler 30 is positioned at the center of the outer circumferential surface of the boundary between the casing 20 and the ending pipe 400 so as to coincide with the single or plural second coupling grooves 300 formed in the inner circumferential surface of the coupler 30, The wire 302 is inserted into the first fastening groove 200 and the third fastening groove 401 through the through hole 301 located at the end of the end pipe 400, A support bracket 410 is coupled to the engagement hole 402 so that the engagement protrusion 411 is engaged with the engagement hole 402 and then the fixing bracket 411 is fixed to the inside of the ending pipe 400 420 are fastened to each other and then the nut 430 is fastened to the upper and lower sides of the fixing bracket 420 through the

pile

50 or 20 The support bracket 410 is fixedly coupled to the coupling hole 402 and then the support bar 440 is inserted into the coupling groove 413 of the support bracket 410. Then, A ring-shaped reinforcing bar 450 having a relatively small diameter on the outer circumferential surface of the support bar 440 and having a relatively small diameter and a relatively large diameter on the upside is coupled.

The reference numeral 50 designates a file. The file 50 is inserted into the casing 20 and the center of the inside of the ending tube 400, and the extension plate 500 is integrally provided at the lower end.

Next, another file construction method according to the present invention will be described with reference to FIGS. 16 and 22. FIG.

[Drilling hole drilling step]

First, in excavating the perforation hole H using the excavation bit 10 capable of multi-step expansion, the casing 20 is coupled to the perforation hole H at the outer periphery thereof, The drilling of the perforated hole,

In this step, when the perforation hole H is drilled by joining the casing 20 to the outer circumferential portion of the drilling bit 10 capable of multi-step expansion, the extension (not shown) of the pile 50 is provided near the lower end of the perforation hole H, After the plate 500 stably seats or presses the casing 20 to seat on the bottom surface of the perforation hole H, the plate 50 is integrally formed at the lower end of the pile 50 up to a position spaced apart from the uppermost end of the casing 20. [ The extension plate 500 is inserted into the hole H so that the extension plate 500 and the rotation cam of the drilling bit 10 can be seated on the uppermost end of the

casing

20, 104 are driven by the shoulder driving portion 110 so that the shoulder protrusion 106 for excavation of the shoulder member 105 is projected to the outer peripheral portion and is inserted into the lower end portion of the perforation hole H or the peripheral portion in the predetermined position of the perforation hole H It is to puncture it with multi-stage.

Of course, when the reaming is not perforated, that is, when a general perforation hole H is perforated, the perforation hole H is perforated in a state where the excavating shoulder protrusion 106 does not protrude to the outer periphery, When the excavating bit 10 is removed from the casing 20 as shown in FIGS. 5 and 7, the excavation shoulder protrusion 106 is naturally excavated The shoulder protrusion 106 for casing does not protrude to the outer periphery and the casing shoulder protrusion 107 is also integrally formed with the excavation shoulder protrusion 106 so that the casing protrusion 107 is pulled out together.

In addition, in the extending connection of the casing 20 for drilling the perforation hole H deeply in the perforation hole drilling step,

When a new casing 20 to be connected to the upper end of the casing 20 exposed near the ground is seated in the process of excavating the excavating bit 10, it is possible to naturally form a single or a plurality of The first coupling groove 200 is maintained at a predetermined interval and the coupler 30 is inserted into each of the casings 20 in conformity with a single or a plurality of second coupling grooves 300 formed in the inner peripheral surface of the coupler 30 The wire 302 is inserted into the first fastening groove 200 and the second fastening groove 300 through the through hole 301 located at the center outer circumferential surface of the boundary line of the upper and lower ends, It is possible to easily attach and detach the casing 20 when the excavation of the perforation hole H is required for deeper excavation or when the depth of the perforation hole H is thinner than expected, The hassle of In a construction which enables the combination or removal to the operator convenience.

[Excavation equipment removal step]

This step is to press the casing 20 into the perforation hole H as it is after the completion of the perforation hole excavation step as described above and to excavate the excavated perforation hole H from the casing 20 press- The bit 10 is removed.

[Grout re-injection step]

In this step, cement grout material is injected into the inside of the press-fitted casing 20 in a state where the excavation bit 10, which is the excavation equipment, is removed and cured,

[Installation step of head reinforcement]

In this step, after the curing of the grout is completed, the ceiling reinforcement 40 is installed on the casing 20 protruding above the ground,

Specifically, the lowest end of the ending pipe 400 is seated at the uppermost end of the casing 20, so that the first fastening groove 200 of the casing 20 and the third fastening groove 401 of the ending pipe 400 are fixed The coupler 30 is moved to the center of the boundary line between the casing 20 and the ending pipe 400 so as to coincide with the single or plural second coupling grooves 300 formed in the inner circumferential surface of the coupler 30, The wire 302 is inserted into the first fastening groove 200 and the third fastening groove 401 through the through hole 301 located on the outer circumferential surface and then the engaging hole 402 of the ending pipe 400 is inserted And the support bracket 410 is engaged with the support bracket 410 so that the engagement protrusion 411 is engaged with the engagement hole 402. The fixing bracket 411 is fixed to the inside of the ending tube 400, And then the nut 430 is fastened to the fastening rod 70 on the upper and lower surfaces of the fixing bracket 420 with the fastening bracket 420 interposed therebetween. The support bracket 410 is fixedly coupled to the coupling hole 402 and then the support bar 440 is inserted into the coupling groove 413 of the support bracket 410. The support bar 440 is fixed to the outer peripheral surface of the support bar 440 And a ring-shaped reinforcing bar 450 having a relatively small diameter and a relatively large diameter as it goes up.

[Completion phase]

In this step, after installing the head reinforcement member, it is a step of assembling the foundation steel and pouring the concrete, and in this step, the construction method of the present invention is completed.

Another embodiment of the pile construction method according to the present invention will be described with reference to Figs. 17 to 19 and Fig. 21 as follows.

[Drilling hole drilling step]

In this step, when the perforation hole H is drilled by joining the casing 20 to the outer circumferential portion of the drilling bit 10 capable of multi-step expansion, the extension (not shown) of the pile 50 is provided near the lower end of the perforation hole H, After the plate (500) stably stays or the casing (20) is seated on the bottom surface of the perforation hole (H) in a pile joining step described in the following, the upper end of the casing The extension plate 500 integrally formed at the lower end of the pile 50 is inserted into the piercing hole H so that the extension plate 500 and the upper end of the casing 20 can be seated with a predetermined distance therebetween, The rotation cam 104 of the bit 10 is driven by the shoulder driving portion 110 so that the shoulder protrusion 106 for excavation of the shoulder member 105 is projected to the outer periphery to form the lower end of the perforation hole H or the perforation hole H ) In a predetermined position of the main body .

[Excavation equipment removal step]

This step is the same as the above-mentioned construction method, and the construction method is a step of combining files.

[File join step]

In this step, the pile 50 is inserted into the center of the inside of the press-fitted casing 20 in a state where the excavating bit 10 as the excavation equipment is removed, and the extension 50 is integrally formed at the lower end of the pile 50, (500) stably stays on the bottom surface of the perforation hole (H)

21, after fitting the casing 20 to the bottom surface of the perforation hole H in the pile joining step, the upper end of the casing 20 is pushed up to a position spaced apart from the uppermost end of the casing 20 The extension plate 500 integrally provided at the lower end of the pile 50 is inserted into the piercing hole H so that the extension plate 500 and the upper end of the casing 20 are maintained at a predetermined distance.

[Grout re-injection step]

In this step, the grout material is injected into the casing 20 coupled with the pile 50 to cure it,

[Installation step of head reinforcement]

Specifically, the lowest end of the ending pipe 400 is seated at the uppermost end of the casing 20, so that the first fastening groove 200 of the casing 20 and the third fastening groove 401 of the ending pipe 400 are fixed The coupler 30 is moved to the center of the boundary line between the casing 20 and the ending pipe 400 so as to coincide with the single or plural second coupling grooves 300 formed in the inner circumferential surface of the coupler 30, The wire 302 is inserted into the first fastening groove 200 and the third fastening groove 401 through the through hole 301 located on the outer circumferential surface and then the engaging hole 402 of the ending pipe 400 is inserted And the support bracket 410 is engaged with the support bracket 410 so that the engagement protrusion 411 is engaged with the engagement hole 402. The fixing bracket 411 is fixed to the inside of the ending tube 400, The nut 420 is fastened to the pile 50 on the upper and lower sides of the fixing bracket 420, The support bracket 410 is fixed to the coupling hole 402 and then the support bar 440 is inserted into the coupling groove 413 of the support bracket 410. Then, Shaped reinforcement bars 450 having a relatively small diameter and a relatively large diameter as they ascend upward.

[Completion phase]

In this step, after installing the head reinforcement member 40, it is a step of assembling the foundation steel and pouring the concrete and curing it. In this step, the construction method of the present invention is completed.

The present invention relates to a civil engineering and construction field applied to a foundation for reinforcing a ground to support the upper structure according to the condition of the ground or the load of the structure when the building or the structure is erected.

Claims

The casing 20 is connected to the outer periphery of the excavation bit 10 by a depth corresponding to the penetration depth of the perforation hole H, A coupling 30 is fastened and coupled to an outer circumferential portion between the upper and lower casings 20 so as to be extendable and a head reinforcement 40 is formed at the upper end of the casing 20 and is inserted through the center of the casing 20, And a pile (50) integrally provided with an extension plate (500)

The drilling bit (10) capable of multi-

And a rotary cam 104 having an outer circumferential surface alternately provided with a cam protrusion 102 and a cam groove 103 is integrally formed at the center of the upper surface of the rotary cam 104, A bit body 100 having three shoulder members 105 in the longitudinal direction,

A pair of fastening holes 112 are formed at predetermined positions near the lower and rear ends of the outer circumferential surface of the cylindrical member 111 to be detachably attached to the upper surface of the bit body 100, And a shoulder driving unit 110 having a shoulder hole 113 formed in the upper and lower portions thereof with an interval maintained and a rotating shaft member 114 coupled to the upper surface thereof. Pile head reinforcement structure using excavation bits.
The casing 20 is connected to the outer periphery of the excavation bit 10 by a depth corresponding to the penetration depth of the perforation hole H, A coupling 30 is fastened and coupled to an outer periphery of upper and lower casings 20 so as to be extendable and a ceiling reinforcement 40 is provided at the upper end of the casing 20,

The drilling bit (10) capable of multi-

And a rotary cam 104 having an outer circumferential surface alternately provided with a cam protrusion 102 and a cam groove 103 is integrally formed at the center of the upper surface of the rotary cam 104, A bit body 100 having three shoulder members 105 in the longitudinal direction,

A pair of fastening holes 112 are formed at predetermined positions near the lower and rear ends of the outer circumferential surface of the cylindrical member 111 to be detachably attached to the upper surface of the bit body 100, And a shoulder driving unit 110 having a shoulder hole 113 formed in the upper and lower portions thereof with an interval maintained and a rotating shaft member 114 coupled to the upper surface thereof. Pile head reinforcement structure using excavation bits.
The casing 20 is connected to the outer periphery of the excavation bit 10 by a depth corresponding to the penetration depth of the perforation hole H, A coupling 30 is fastened and coupled to an outer circumferential portion between the upper and lower casings 20 so as to be extendable and a head reinforcement 40 is formed at the upper end of the casing 20 and is inserted through the center of the casing 20, And a pile (50) integrally provided with an extension plate (500)

The head reinforcement (40)

The upper end of the casing 20 is connected to the coupling 30 by the coupling 30 and the lower end has a third coupling groove 401 and a cylindrical ending pipe 400 )and,

And a seat cushion 411 is formed on the upper and lower sides thereof and a seat cushion 412 is formed on the other side thereof with a relatively long rectangular shape, 412), a support bracket 410 having a coupling groove 413 formed therein at a predetermined position,

A plurality of protrusions 411 protruding inwardly from the ending pipe 400 through the fitting hole 402 of the ending pipe 400 are vertically fixed with a through hole 421 formed at the center thereof, A plurality of fixing brackets 420 provided with a step 422 for fixing the locking protrusion 411,

A nut 430 for fixing the fixing bracket 420 on the upper and lower surfaces of the fixing bracket 420,

A support bar 440 slidably coupled to the coupling groove 413 so as to be widened upward,

And a ring-shaped reinforcing bar 450 having a relatively small diameter and a relatively large diameter as it goes up is coupled to the outer circumferential surface of the support bar 440 at a lower side thereof. Pile head reinforcement structure using available excavation bits.
The casing 20 is connected to the outer periphery of the excavation bit 10 by a depth corresponding to the penetration depth of the perforation hole H, A coupling 30 is fastened and coupled to an outer periphery of upper and lower casings 20 so as to be extendable and a ceiling reinforcement 40 is provided at the upper end of the casing 20,

The head reinforcement (40)

The upper end of the casing 20 is connected to the coupling 30 by the coupling 30 and the lower end has a third coupling groove 401 and a cylindrical ending pipe 400 )and,

A bolt-shaped connecting rod 70 inserted through the center of the inside of the ending tube 400,

One side of the connecting rod is coupled to the coupling hole 402 and is rounded concavely to press the connecting rod 70. The locking rod 411 is formed on the upper and lower sides, A support bracket 410 in which a coupling groove 413 is formed at a predetermined position on the upper surface of the seating piece 412,

A plurality of protrusions 411 protruding inwardly from the ending pipe 400 through the fitting hole 402 of the ending pipe 400 are vertically fixed with a through hole 421 formed at the center thereof, A plurality of fixing brackets 420 provided with a step 422 for fixing the locking protrusion 411,

A nut 430 for fixing the fixing bracket 420 on the upper and lower surfaces of the fixing bracket 420,

A support bar 440 slidably coupled to the coupling groove 413 so as to be widened upward,

And a ring-shaped reinforcing bar 450 having a relatively small diameter and a relatively large diameter as it goes up is coupled to the outer circumferential surface of the support bar 440 at a lower side thereof. Pile head reinforcement structure using available excavation bits.
5. The method according to any one of claims 1 to 4,

The casing 20 has a single or a plurality of first fastening recesses 200 formed on the upper and lower outer circumferential surfaces of the casing 20, The first fastening groove 300 and the second fastening groove 300 are formed in the first fastening groove 200 and the second fastening groove 300 through the through hole 301 formed in one side of the second fastening groove 300, And the upper and lower casings (20) are coupled to each other so that the upper and lower casings (20) can be extended.
5. The method according to any one of claims 1 to 4,

A cylindrical casing shoe 60 can be coupled to the lowermost end of the casing 20,

The casing shoe 60 is provided with a seating chin 600 on the inner circumferential surface so that the lowest end of the casing 20 can be seated and a single or a plurality of fourth coupling grooves 602 are provided on the seating chin 600 And an insertion hole 601 penetrating outward is perforated at a predetermined position of the fourth coupling groove 602 so that the first coupling groove 200 provided in the casing 20 and the fourth coupling groove 602 formed in the fourth coupling groove 602 Wherein the casing shoe (60) is detachably coupled to a casing (20) coupled at the lowermost end by inserting and connecting the wire (302). Reinforced structure.
A drilling hole H is formed by drilling the drilling hole H using a drilling bit 10 capable of multi-stage drilling to join the casing 20 to the outer periphery of the drilling hole H, A hole drilling step and an excavating equipment removing step of removing the excavating bit 10 from the casing 20 press-fitted into the inside of the excavated perforation hole H and a step of removing the excavating bit 10 A cement grout material injecting step of injecting and curing a cement grout material to the outside of the press-fitted casing 20 and a cushion grout material filling step of curing the tofu reinforcement material 40 in the casing 20 protruding from the ground surface after the grout material injecting step And a completion step of installing the reinforcement member (40), assembling the foundation steel, and curing the concrete by installing the reinforcement member (40)

In the extending connection of the casing 20 for drilling the perforation hole H deeply in the perforation hole drilling step,

When a new casing 20 to be connected to the upper end of the casing 20 exposed near the ground is seated in the process of excavating the excavating bit 10, it is possible to naturally form a single or a plurality of The first coupling groove 200 is maintained at a predetermined interval and the coupler 30 is inserted into each of the casings 20 in conformity with a single or a plurality of second coupling grooves 300 formed in the inner peripheral surface of the coupler 30 The wire 302 is inserted into the first fastening groove 200 and the second fastening groove 300 through the through hole 301 located at the center outer circumferential surface of the boundary line of the upper and lower ends, Wherein the first and second portions are constructed so as to be extendable.
A drilling hole H is formed by drilling the drilling hole H using a drilling bit 10 capable of multi-stage drilling to join the casing 20 to the outer periphery of the drilling hole H, A hole drilling step and an excavating equipment removing step of removing the excavating bit 10 from the casing 20 press-fitted into the inside of the excavated perforation hole H and a step of removing the excavating bit 10 A pile 50 having an extension plate 500 integrated at the lower end is inserted into the center of the press-fitted casing 20, and the extension plate 500 is inserted into the pile 50 And a casing 20 projecting onto the ground after the grout material injecting step. The grouting material injecting step cures by injecting cement grout material to the outside of the casing 20 coupled with the pile 50, The head reinforcement 40 is installed in the head reinforcement And a completion step of installing the reinforcing bar body 40 and assembling the foundation reinforcing bar and curing the concrete by curing.

In the drilling of the perforation hole H, when the perforation hole H is pierced by joining the casing to the outer periphery of the drilling bit 10 capable of multi-stage piercing in the perforation hole drilling step, After the extension plate 500 stably stays or presses the casing 20 to seat the bottom of the perforation hole H in the pile joining step, The extension plate 500 integrally formed at the lower end of the casing 50 is inserted into the hole H so that the excavation bit 500 can be seated on the upper end of the casing 20, 10 is driven by the shoulder driving portion 110 so that the shoulder protrusion 106 for excavation of the shoulder member 105 protrudes to the outer peripheral portion to protrude from the lower end of the perforation hole H or the lower end of the perforation hole H A plurality of holes are drilled in the peripheral portion of the predetermined position How to file construction that features.
9. The method of claim 8,

In the extending connection of the casing 20 for drilling the perforation hole H deeply in the perforation hole drilling step,

When a new casing 20 to be connected to the upper end of the casing 20 exposed near the ground is seated in the process of excavating the excavating bit 10, it is possible to naturally form a single or a plurality of The first coupling groove 200 is maintained at a predetermined interval and the coupler 30 is inserted into each of the casings 20 in conformity with a single or a plurality of second coupling grooves 300 formed in the inner peripheral surface of the coupler 30 The wire 302 is inserted into the first fastening groove 200 and the second fastening groove 300 through the through hole 301 located at the center outer circumferential surface of the boundary line of the upper and lower ends, Wherein the first and second portions are constructed so as to be extendable.
9. The method according to claim 7 or 8,

In the installation of the head reinforcement member 40,

The lower end of the ending pipe 400 is seated at the uppermost end of the casing 20 so that the first fastening groove 200 of the casing 20 and the third fastening groove 401 of the ending pipe 400 are spaced apart from each other The coupler 30 is positioned on the outer circumferential surface of the boundary line between the casing 20 and the ending pipe 400 so as to coincide with the single or plural second coupling grooves 300 formed in the inner circumferential surface of the coupler 30 in this state The wire 302 is inserted into the first fastening groove 200 and the third fastening groove 401 through the through hole 301 and then inserted into the support bracket 402 through the coupling hole 402 of the ending pipe 400 And a fixing bracket 420 for fixing the plurality of locking protrusions 411 to the inside of the ending pipe 400 in the vertical direction after the locking protrusions 411 are engaged with the coupling holes 402 And then the nut 430 is fastened to the pile 50 or the fastening rod 70 at the upper and lower sides with the fixing bracket 420 interposed therebetween. The support bracket 410 is fixed to the coupling hole 402 and then the support bar 440 is inserted into the coupling groove 413 of the support bracket 410. Then, And a ring-shaped reinforcing bar (450) having a relatively small diameter and a relatively large diameter as it goes up.