WO2019022581A1

WO2019022581A1 - Improved hole drilling apparatus using screw casings and earth anchor method using same

Info

Publication number: WO2019022581A1
Application number: PCT/KR2018/008594
Authority: WO
Inventors: 강익희
Original assignee: 강익희
Priority date: 2017-07-28
Filing date: 2018-07-30
Publication date: 2019-01-31
Also published as: KR102091691B1; KR20190012646A

Abstract

The present invention relates to an apparatus for drilling a hole in the ground and a ground reinforcing method and, more specifically, to an improved hole drilling apparatus using screw casings and an earth anchor method using same, in which a head part and a casing or neighboring casings are coupled by keys and key grooves so as to be inseparable when drawing the casings, even if rotated in the direction opposite to the screw coupling direction, and the rotation in the opposite direction when drawing the casings prevents grooves formed by screws from being destroyed, resulting in an improved ground reinforcing effect.

Description

Improved punching apparatus using screw casing and earth anchor method using the same

The present invention relates to a device for boring a ground and a method for reinforcing a ground, wherein the head and the casing are coupled to each other by a key and a key groove between the casings or between adjacent casings, Thereby improving the effect of reinforcing the ground by increasing frictional force and consequently improving the ground reinforcement effect, and an improved punching apparatus using the same, It is an anchor construction method.

In general, when construction of roads, bridges, buildings, etc. is carried out on soft grounds with insufficient bearing capacity as a foundation of buildings, earthworks are installed for installation of underground structures. In this case, various methods are used to prevent the collapse of the earth One of them is earth anchor method.

The earth anchor method is a method in which a hole having a diameter of about 100 mm to 150 mm is drilled to a predetermined depth by using a punching machine to insert a prefabricated cable and then a grouting ) Fill ashes, make anchors on the back, apply tension to the cables from the outside, and hold the retaining walls.

Such existing apparatus and method will be described with reference to Figs. 1 to 4. Fig.

As shown in the drawing, the conventional perforating apparatus includes a guide unit 11 provided in the punching apparatus main body 10-1 so as to be adjustable in angle by a cylinder, And a casing (20) provided in the casing (11). The casing (20) is detachably connected to the head part (15) by a connecting part.

The head 15 is provided with a rotary joint 14. The rotary joint 14 is provided to move relative to the head 15. That is, even if the head 15 rotates, the rotary joint 14 is kept stationary. To this end, a bearing is provided inside the rotary joint 14. [

The casing 20 includes a hollow casing body 21 and a screw 23 protruding outwardly from the outer surface of the casing body 21 and forming a spiral. A male screw portion 25 is formed on the outer side surface of one end of the casing main body 21 and a female screw portion 29 is formed on the outer side surface of the other end. That is, a plurality of casings 20 are arranged in the perforated direction and are coupled to each other. To this end, the male thread portion 25 of one casing 20 is inserted into the female thread portion 29 of the adjacent casing 20, do. An end portion of the casing 20 in which the female screw portion 29 is formed is inserted into the female screw portion 29 so that the diameter of the tube portion 27 is increased.

A bit (30) is provided at the end of the casing (20) in the direction of puncturing. A casing shoe 40 is provided at the end of the bit 30 and the direction of the piercing of the casing 20 to connect the bit 30 to the casing 20. The bit 30 consists of a bit head 37 and a bit connection 31. A plurality of bit key portions 33 are provided on the outer surface of the bit connection portion 31. The bit key portion 33 protrudes outwardly from the outer surface of the bit connection portion 31 and extends in the longitudinal direction and is circumferentially spaced. A bit groove 35 is similarly formed on the inner surface of the bit connection part 31. A bit key portion (not shown) and a bit groove (not shown) of the casing shoe 40 are inserted and connected to the bit key portion 33 and the bit groove 35 of the bit connection portion 31, respectively.

The casing shoe 40 and the casing 20 are screwed together. And a male screw portion 25 formed at the end of the casing 20 in the direction of the piercing is screwed and connected to the inside of the casing shoe 40.

A method of strengthening a ground using such a conventional punching apparatus will be described.

The casing 20 provided with the bit 30 and the casing shoe 40 is connected to the head portion 15 by screwing. That is, after the female screw portion 29 of the casing 20 contacts the head portion 15, the head portion 15 is rotated in the screw direction to couple with each other. Thereafter, the casing 20 is advanced and punctured while rotating the casing 20 in the screwing direction. The casing 20 is advanced by a head driving means (not shown) provided on the guide portion 11. [ The head driving means is moved forward and backward by a moving means (for example, a chain) provided on the guide portion 11 and the casing 20 passes through the guide supporting portion 11-1 for stable forward and backward movement.

The casing 20 advances to a certain depth and pierces while rotating in the screwing direction.

And then the separate casing 20 is coupled to the rear end in the bore direction. To this end, the head portion 15 is reversely rotated to separate it from the casing 20 and then backward. A separate casing 20 is connected to the backward head 15 by the same method and then advanced. The separate casing 20 is screwed to the conventional casing 20 while rotating in the screw direction. Thereafter, the casing 20 is similarly advanced and pierced while rotating in the screwing direction. This is because the casing 20 is screwed to each other, so that when the casing 20 is rotated in the opposite direction, the casing 20 is separated from each other.

After the casing 20 is advanced to a predetermined depth, the cement milk is injected through the rotary joint 14 provided in the head part 15. [ After passing through the casing 20, the cement milk is injected into the perforated part through the bit 30 and cured to strengthen the ground. Thereafter, a separating rod (not shown) is inserted into the casing 20 to separate the bit 30, and the anchor body is inserted into the casing 20. [ Thereafter, as described above, the casing 20 is pulled out while the cement milk is poured, and a specific substance is injected through the injection hose of the anchor body to expand the dimension parka. Finally, reinforce the ground by curing the injected milk cement.

However, in the conventional technique as described above, the casing is pulled while rotating in the screwing direction to pull out the casing. This is because the casings and the casing and the head portion are screwed to each other in a specific direction, so that if they rotate in opposite directions, the casings or the casing and the head portion are separated from each other.

Therefore, the casing is pulled out while rotating in the screwing direction. In this case, the spiral groove formed by the screw of the casing is broken at the time of punching, and the ground reinforcing effect is deteriorated.

Meanwhile, the punching apparatus and the ground reinforcement method itself using the punching apparatus as described above are well-known and particularly described in the following prior art documents, and a detailed description thereof will be omitted.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a cushion structure for a cushion, It is an object of the present invention to provide an improved perforating device using a screw casing which can rotate in the opposite direction when the casing is pulled out to prevent collapse of the groove formed by the screw and consequently to improve the ground reinforcement effect and an earth anchor method do.

According to an aspect of the present invention, there is provided a punching device comprising: a guide unit provided on a body of a punching device so as to be adjustable in angle with a cylinder; and a guide unit provided on the guide unit to be movable along a longitudinal direction of the guide unit, A rotary joint provided at the head portion and having a charging port at one side thereof; and a plurality of rotary joints detachably installed at the head portion and detachably connected to each other and arranged in parallel with the guide portion, A casing and a bit coupled to an end of the casing provided at the tip of the casing; Wherein the connecting portion includes a connecting body protruding from the first side to be parallel to the guide portion and having a pin hole formed therein and a plurality of connecting key portions protruding outwardly from the outer surface of the connecting portion body and extending in the longitudinal direction and spaced apart in the circumferential direction; The bit includes a bit head, a bit connection portion extending in the longitudinal direction of the guide portion from the bit head toward the casing, and a plurality of bit key portions protruding outwardly from the bit connection portion and extending in the longitudinal direction and spaced apart in the circumferential direction Lt; / RTI > The casing is a hollow body having a spiral screw protruding outwardly on an outer surface thereof, and has a first connecting portion on one side in the longitudinal direction and a second connecting portion on the other side. The first connecting portion includes a first connecting pin And a plurality of casing key portions provided on the outer surface of the first connection body and protruding outwardly and extending in the longitudinal direction and spaced apart in the circumferential direction, the second connection portion being formed with a second connection pin hole, A plurality of casing keyways formed of a second connection body and recessed in the inner surface of the second connection body and extending in the longitudinal direction and spaced apart in the circumferential direction; The connecting body is inserted into the second connecting body, the connecting key is inserted into the casing key groove, the first connecting body on the other side is inserted into the second connecting body of the other casing, and the casing key is inserted into the keying key groove And a bit is coupled to the end of the casing provided at the tip through a casing shoe. The present invention also provides an improved drilling apparatus using the screw casing.

In this case, when the casing is drawn out from the perforation, a connecting adapter is further provided between the casing and the connecting portion; Wherein the casing key groove portion is concave and further comprises a key groove extension portion extending in a circumferential direction which is a direction of drawing out from the end of the first connection portion; Wherein the first adapter unit is provided on the outer surface of the first adapter unit main body and the second adapter unit is provided on the outer side of the first adapter unit main body, And the second adapter portion is hollow and comprises a second adapter portion main body having an adapter pin hole formed therein and recessed in the inner surface of the second adapter portion main body A plurality of adapter key portions extending in the longitudinal direction and spaced apart from each other in the circumferential direction are formed, the adapter key portion having an adapter key extension portion extending in the circumferential direction in the pull-out rotation direction at the end portion facing the casing; The first adapter extension portion is inserted into the second connection portion of the casing and the adapter key portion is inserted into the casing key groove portion and inserted into the second adapter portion so that the connection key portion is inserted into the adapter key groove portion, (Not shown) is inserted and the connection portion is coupled to the second adapter portion, and the connection adapter is provided between the casing and the connection portion; During rotation for withdrawing the casing, the adapter key extension is inserted into the keyway extension to prevent the adapter from being longitudinally separated from the casing.

In this case, a guide supporting portion having a guide hole penetrated in the longitudinal direction so that the casing is slidably inserted into the guide portion is provided at the tip end portion of the guide portion. The casing has a front end portion of the casing in which the connection portion is coupled with the second connection portion, But does not extend beyond the guide support.

In the above, the circumferential width of the adapter key portion including the adapter key extension portion is formed to be smaller than the circumferential width of the casing groove portion except for the keyway extension portion. The adapter key portion is slid in the longitudinal direction and inserted into the casing groove portion, Is inserted into the additional keyway extension.

According to another aspect of the present invention, there is provided a punching machine comprising a guide unit provided in a main body of a drilling machine so as to be adjustable in angle by a cylinder, a guide unit movably installed along a longitudinal direction of the guide unit, A multistage method ground punching apparatus comprising a head for rotationally driving the casing, and a rotary joint provided at a connecting portion of the head portion to which the casing is coupled and having a charging port at one side; A drilling step of forming a drilling hole in the ground by rotating the casing while advancing the head part along the guide part, and a bit separating step of separating the bits provided at the tip of the casing after drilling to the target depth, An anchor body coupling step of coupling an end of the anchor body to the bit by inserting an anchor body, a casing pulling step of pulling out the casing while grouting, and anchoring the anchor body to the anchor body by pulling the anchor body after curing; Wherein a connection portion between the casing and the head portion is coupled to each other by the casing key groove portion and the connection key portion and is prevented from being longitudinally separated by the pin. In the casing pulling step, The present invention provides an earth anchor method using an improved piercing apparatus using the same.

In the perforating step, the head is moved forward while rotating the casing, and the casing is separated from the connecting part of the head part for continuous punching, the head part is moved backward, the additional casing is connected to the connecting part of the head part, The other side of the additional casing is coupled to the line perforation casing by the casing key groove portion and the casing key portion, and the head portion continues to rotate while continuing the perforation; Casing for perforation to the target depth is repeatedly inserted.

In the above-described casing drawing step, a connecting adapter is further provided between the casing and the head portion connecting portion; The casing is a hollow body having a spiral screw protruding outwardly on an outer surface thereof, and has a first connecting portion on one side in the longitudinal direction and a second connecting portion on the other side. The first connecting portion includes a first connecting pin And a plurality of casing key portions provided on the outer surface of the first connection body and protruding outwardly and extending in the longitudinal direction and spaced apart in the circumferential direction, the second connection portion being formed with a second connection pin hole, A plurality of casing keyways formed of a second connection body and recessed in the inner surface of the second connection body and extending in the longitudinal direction and spaced apart in the circumferential direction; Wherein the connection portion extends parallel to the guide portion and extends toward the casing and includes a connection body formed with a pin hole and a plurality of connection key portions protruding outwardly from an outer surface of the connection portion body and extending in the longitudinal direction and spaced apart in the circumferential direction; The connection adapter includes a first adapter on one side in the longitudinal direction and a second adapter part on the other side in the longitudinal direction and is connected to the head connecting part and the casing by the adapter key groove part and the adapter key part respectively; The connection adapter includes a first adapter unit on the side facing the casing in the longitudinal direction and a second adapter unit on the side facing the connection unit. The first adapter unit is provided on the outer surface of the first adapter unit main body and the first adapter unit main body And a second adapter portion main body having a plurality of adapter key portions protruding outwardly and extending in the longitudinal direction and spaced apart from each other in the circumferential direction, the second adapter portion being hollow and having an adapter pin hole, A plurality of adapter key portions extending in the longitudinal direction and spaced apart in the circumferential direction are formed, and the adapter key portion has an adapter key extension portion extending in the circumferential direction and in the pull-out rotation direction at the end portion facing the casing; The first adapter extension portion is inserted into the second connection portion of the casing and the adapter key portion is inserted into the casing key groove portion and inserted into the second adapter portion so that the connection key portion is inserted into the adapter key groove portion, Is inserted to connect the connection portion to the second adapter portion, the connection adapter being provided between the casing and the connection portion; During rotation for withdrawing the casing, the adapter key extension is inserted into the keyway extension to prevent the adapter from being longitudinally separated from the casing.

In this case, in the casing pulling step, the head portion is rotated backward while being rotated backward, the casing is pulled out of the piercing, and when the engaging portion of the casing and the adjacent casing is exposed in the piercing, the pin is removed from the casing coupling portion, The drawer casing connected to the head portion is clamped and the head portion is rotated in the direction of perforation so that the adapter key extension portion is separated from the key hole extension portion and the head portion is pulled back and the connection adapter is separated from the drawer casing And the clamped drawn casing is moved laterally and the head portion is advanced to insert the first adapter portion of the connecting adapter portion into the second connecting portion of the perforated neighboring casing and reverse rotation to insert the adapter key extending portion into the key hole extending portion, The head is moved backward, Drawing and is repeated until all of the casing in the drilling drawing.

As described above, according to the present invention, it is possible to facilitate the separation after the casing is pulled out by the use of the key groove, and the grooves formed by the screws of the casing can be maintained even when the casing is pulled out to maintain the perforated state, So that the soil reinforcement effect can be improved.

1 is a schematic view showing a general punching apparatus,

2 is a schematic view showing a state in which a bit of a general punching apparatus, a casing shoe and a casing are coupled,

3 is a schematic view showing a casing of a general punching apparatus,

4 is a schematic view showing a state where a bit of a general punching device and a casing shoe are combined,

5 is a schematic view showing a perforating apparatus according to an embodiment of the present invention,

FIG. 6 is a schematic view showing a state where a bit, a casing shoe and a casing of a perforating apparatus according to an embodiment of the present invention are combined,

FIG. 7 is a schematic view showing a state where a bit of a perforating apparatus and a casing shoe are combined according to an embodiment of the present invention,

8 is a schematic view showing a casing of a perforating apparatus according to an embodiment of the present invention,

9 is a schematic view showing a state where a head part of a drilling machine and a rotary joint are combined according to an embodiment of the present invention,

10 is a schematic view showing a connection adapter unit of a perforation apparatus according to an embodiment of the present invention,

FIGS. 11 to 17 are schematic views sequentially illustrating a construction method according to an embodiment of the present invention,

18 is a flowchart of a construction method according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

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

As shown in FIGS. 5 to 10, the punching apparatus of the present invention includes a guide unit 110 provided on the body of the punching apparatus so as to be adjustable in angle by a cylinder, A head part 150 provided on the guide part 110 and provided with a connection part 153 at one side for rotatably driving the casing 200 detachably connected to the connection part 153; And a rotary joint 140 having an inlet 141 at one side thereof. The rotary joint 140 is installed in the connection part 153 and is relatively movable. That is, even if the connection unit 153 rotates, the rotary joint 140 maintains a stationary state. For this purpose, a bearing or the like is used between the rotary joint 140 and the connecting portion 153.

The guide part 110 is provided with a head part driving means M for driving the head part 150 in the longitudinal direction of the guide part 110 in the forward and backward directions. The head driving unit M moves back and forth the head unit 150 while moving in the longitudinal direction of the guide unit 110 by a chain or the like provided on the guide unit 110. [

A plurality of casings 200 are detachably mounted on the head unit 150. The plurality of casings 200 are detachably connected to each other and are disposed side by side with the guide portion 110. A bit 300 coupled to an end of the casing 200 is provided at the tip of the casing 200 in the perforation direction.

The connection unit 153 is for connecting the head unit 150 and the casing 200 and comprises a connection body 151 protruded to one side so as to be parallel to the guide unit 110 and having a pin hole 153-3 formed therein. A plurality of connection key portions 153-1 protrude outwardly from the outer surface of the connection body 151 and extend in the longitudinal direction and are spaced in the circumferential direction.

The bit 300 includes a bit head 370 disposed at the end in the bore direction and a bit connection part 310 extending in the longitudinal direction of the guide part 110 from the bit head 370 toward the casing 200 . On the outer surface of the bit connection part 310, a plurality of bit key parts 330 protrude outward, extend in the longitudinal direction, and are spaced in the circumferential direction.

The casing (200) is a hollow body having a screw (211) protruding outward on the outer surface and forming a spiral. The first connection part 220 is provided on one side of the casing 200 in the longitudinal direction and the second connection part 230 is provided on the other side.

The first connection part 220 includes a first connection body 221 formed with a first connection pin hole 225 and a second connection body 221 formed on the outer surface of the first connection body 221 and protruding outward and extending in the longitudinal direction, And a plurality of casing key portions 223.

The second connection unit 230 includes a second connection unit 231 having a second connection pin hole 235 formed in an expanded shape and recessed in an inner surface of the second connection unit 231, A plurality of casing key recesses 233 extending in the circumferential direction are formed. When the adjacent casing 200 is connected, the first connection part 220 of the casing 200, which is disposed in the second connection part 230 of the casing 200 disposed at the front end in the direction of the perforation, The second connection body 231 has an expanded shape. The casing key portion 223 of the first connection portion 220 is inserted into the casing key groove portion 233 of the second connection portion 230. [

When the casing 200 is connected to the connection unit 153, the connection unit body 151 is inserted into the second connection unit 230 of the casing 200. The connection body 151 is inserted into the second connection body 231 of the second connection portion 230. At this time, the connection key portion 153-1 of the connection portion 153 is inserted into the casing key groove portion 233 of the second connection portion 230. The first coupling body 221 on the other side of the casing 200 is inserted into the second coupling body 231 of the adjacent casing 200 and the casing key portion 223 is inserted into the keying key groove portion 233 .

The pin hole 153-3 of the connecting portion 153 is formed in a radial direction between the connecting key portions 153-1 in the circumferential direction. The pin hole 153-1 of the connection part 153 may be formed in the shape of a concave groove.

The coupling part 153 is inserted into the second coupling part 230 of the casing 200 and the pin hole 153-3 and the second coupling pin hole 235 are inserted into the coupling part 153, (Not shown) is inserted to prevent the connection portion 153 from being separated from the second connection portion 230 in the longitudinal direction.

When the casing 200 and the casing 200 are connected to each other, the first connection portion 220 of the casing 200 disposed at the tip end in the perforation direction is inserted into the second connection portion 230 of the adjacent casing 200, A pin (not shown) is inserted into the first connection pin 225 and the second connection pin hole 235 to prevent the casing 200 adjacent to the casing 200 from being separated from each other in the longitudinal direction.

The bit 300 is coupled to the end of the casing 200 provided at the tip via the casing shoe 500.

The casing shoe 500 is provided with a first shoe connection part 510 in which a bit 300 is connected to one side of a longitudinal direction as a hollow body and a second shoe connection part 510 in which a first connection part 220 of the casing 200 is connected to the opposite side. A connection portion 520 is provided.

The first shoe connection part 510 is formed with a plurality of first shoe key grooves 511-1 which are recessed in the inner surface and extend in the longitudinal direction and are circumferentially spaced apart from each other. The bit connection part 310 is inserted into the first shoe connection part 410 and the bit key part 330 is inserted into the shoe key groove 511-1 so that the bit 300 and the casing shoe 500 are integrally rotated.

The second shoe coupling part 520 has a plurality of second shoe key grooves 521-1 which are recessed in the inner surface and extend in the longitudinal direction and are spaced apart in the circumferential direction, A spindle ball is formed. The shoe fin 521-2 is formed in a radial direction.

The first connecting portion 220 of the frontmost casing 200 is inserted into the second shoe connecting portion 520 and the casing key portion 223 is inserted into the second shank groove 521-1, A pin (not shown) is inserted into the shoe fin hole 521-2 and the first connection pin hole 225 so that the casing 200 is separated from the casing shoe 500 in the longitudinal direction .

A connection adapter 400 is further provided between the casing 200 and the connection part 153 when the casing 200 is pulled out from the perforation.

The casing key groove 233 of the second connection part 230 is concave and further includes a key groove extension part 233-1 extending in the circumferential direction in the direction of drawing out from the end of the first connection part 220 side.

The connection adapter 400 includes a first adapter unit 410 on the side facing the casing 200 in the longitudinal direction and a second adapter unit 420 on the side facing the connection unit 153.

The first adapter unit 410 includes a first adapter unit main body 411 and a plurality of adapter key units 411 provided on the outer surface of the first adapter unit main body 411 and projecting outwardly and extending in the longitudinal direction and spaced apart in the circumferential direction 413). The second adapter unit 420 is hollow and comprises a second adapter unit main body 421 formed with an adapter pin hole 425. The second adapter unit main body 421 is recessed on the inner surface of the second adapter unit main body 421 and extends in the longitudinal direction, A plurality of adapter key recesses 423 are formed. The adapter key portion 413 has an adapter key extension portion 413-1 which is circumferentially formed at an end of the adapter key portion 413 facing the casing 200 and extends in the direction of the rotation.

The first adapter extension part 413-1 is inserted into the second connection part 230 of the casing 200 and the adapter key part 413 is inserted into the casing key groove part 233 of the second connection part 230, The connection portion 153 is inserted into the second adapter portion 420 so that the connection key portion 153-1 is inserted into the adapter key groove portion 423 and the adapter pin hole 425 and the pin hole 153-3 are inserted into the pin And the connection portion 153 is coupled to the second adapter portion 420. Accordingly, the connection adapter 400 is provided between the casing 200 and the connection portion 153.

That is, the casing 200, the connection adapter 400, and the connection unit 153 are sequentially disposed, the first adapter unit 410 is inserted into the second connection unit 230 of the casing 200, The connection portion 153 is inserted into the connection portion 420 and interlocked with each other by coupling the key and the key groove.

The adapter key extension portion 413-1 is inserted into the key groove extension portion 233-1 to prevent the adapter 400 from being separated from the casing 200 in the longitudinal direction when the casing 200 is rotated for withdrawing the casing 200. [ That is, when the casing 200 is rotated, the adapter key extension part 413-1 is caught by the keyway extension part 233-1 to prevent the adapter 400 from being detached.

The circumferential width W2 of the adapter key portion 413 including the adapter key extension portion 413-1 is smaller than the circumferential width W1 of the casing groove portion 233 except for the keyway extension portion 233-1 . As a result, the adapter key portion 413 is slid in the longitudinal direction, inserted into the casing groove portion 233, and rotated while the adapter key extension portion 413-1 is inserted into the keyway extension portion 233-1.

According to the present invention, the casing 200 and the casing 200, and the casing 200 and the coupling adapter 400 are connected to each other by the coupling of the key and the keyway, and the pins are inserted and fixed to the pin hole. Therefore, when the casing 200 is pulled out, the casing 200 is not detached even if it is pulled out while rotating in the direction opposite to the screw 211. Therefore, when the casing 200 is pulled out, the grooves formed by the screw are not collapsed, and the grouting material is injected into the grooves to improve the ground reinforcement effect.

Conventionally, it was difficult to draw in the opposite direction of the screw when the casing was pulled out. That is, conventionally, the casing is threaded and the direction of progression of the screw is the same as the progress direction of the screw (that is, the direction of rotation when drilling). Therefore, when the casing is rotated in the direction opposite to the screw connection when the casing is pulled out, the casing is separated from each other, so that the casing retracts while rotating in the screw advancing direction (i.e. According to this conventional technique, grooves formed by the screw are broken during drawing, so that it is difficult for the grouting material to be injected and the ground reinforcing effect is deteriorated. However, the present invention has solved the above problems by the above-described structure.

A guide support portion 111 having a guide hole (not shown) penetrated through the guide portion 110 is formed in the longitudinal direction of the guide portion 110 so that the casing 200 can be slidably inserted. At this time, in the casing 200, the leading end of the casing 200 to which the second connection part 230 of the casing 200 is coupled is connected to the guide support part 111 ). &Lt; / RTI > By such a configuration, the casing 200 is prevented from being detached from the guide support portion 111. [

Hereinafter, an earth anchor method using the improved piercing apparatus using the screw casing of the present invention will be described with reference to FIGS. 5 to 18. FIG.

The punching apparatus includes a guide unit 110 provided in the punching apparatus body so as to be angle-adjustable by a cylinder, a guide unit 110 provided on the guide unit 110 so as to be movable along the longitudinal direction of the guide unit 110, A head part 150 for rotating the casing 200 detachably connected to the connection part 153 and a connection part 153 of the head part 150 to which the casing 200 is coupled, And a rotary joint 140 having an inlet 141 at one side thereof.

11, the casing 200 is coupled to the head unit 150, and the head unit 150 is advanced along the guide unit 110 to rotate the casing 200, (ST-110). (ST-110), and the milk cement is injected through the inside of the casing (200) and the inside of the bit (300) to grout. When grouting, apply pressure grouting to feed milk cement at high pressure.

A bit separating step ST-120 of separating the bit 300 provided at the tip of the casing 200 after perforating to the target depth by the drilling step ST-110 is performed. 12, the bit separating step ST-120 inserts the removal rod EB into the casing 200, and then pushes the bit 300 to separate it. At this time, grouting continues even after the bit 300 is separated as shown in FIG.

Then, as shown in FIG. 14, the anchor body AB is inserted into the casing 200 to join the anchor body AB to the bit 300, and an anchor body coupling step ST-130 is performed. After the anchor body coupling step (ST-130) is performed, a casing drawing step (ST-140) for drawing out the casing 200 while performing grouting is performed. In the casing drawing step ST-140, the casing 200 is pulled out while rotating in a direction opposite to the direction of the perforation so as to maintain the groove formed by the screw of the casing 200. Casing In the drawing step (ST-140), the curing is continued during drawing to maintain the pressure in the hole, thereby filling the spiral portion formed by the casing and preventing collapse . In order to prevent excessive milk cement injection, it is possible to sense the grouting input pressure so that a proper amount can be inputted.

The casing 200 is pulled out by the casing drawing step ST-140 and the parker PC is extended while grouting the inside of the anchor body AB as shown in Figs. 15 and 16, Is exposed to the outside of the ground and the grouting material is introduced through a greeting injection pipe (GP) connected to the parka (PC).

Thereafter, as shown in FIG. 17, the ground reinforcement work is completed by performing an anchor body fixing step (ST-150) in which the anchor body AB after curing is pulled and fixed to the pressure plate GG.

At this time, the coupling part 153 of the casing 200 and the head part 150 is coupled to each other by the casing key groove part 233 and the coupling key part 153-1, and is prevented from being longitudinally separated by the pin, In step ST-140, the head unit 150 moves backward while being retracted, and the casing 200 is pulled out. That is, the casing is pulled out while rotating in the reverse direction opposite to the rotating direction of the casing during the casing pull-out step (ST-140), so that the groove formed by the screw of the casing is not collapsed as described above.

In the drilling step ST-110, the casing 200 is rotated by advancing the head part 150, and the casing 200 is separated from the head part connecting part 153 for continuous punching. The additional casing 200 is connected to the connection part 153 of the head part 150 and the head part 150 is advanced so that the other side of the additional casing 200 is connected to the line perforated casing 200 Is coupled by the casing key groove portion 233 and the casing key portion 223, and the head portion 150 rotates while continuing to advance to continue the perforation. In this way, the casing for perforation is repeatedly added to the target depth.

The connection adapter 400 is further provided between the casing 200 and the connection part 153 of the head part 150 in the casing drawing step ST-140. To this end, the casing (200) is a hollow body having a screw (211) protruding outward on the outer surface, and has a first connection part (220) on one side in the longitudinal direction and a second connection part (230) on the other side .

The first connection part 220 includes a first connection body 221 formed with a first connection pin hole 225 and a second connection body 221 formed on the outer surface of the first connection body 221 and protruding outward and extending in the longitudinal direction, And the second connection portion 230 is formed of a second connection body 231 having a second connection pin hole 235 formed in an expanded shape and the second connection body 231 231 are formed on the inner surface thereof, and a plurality of casing key groove portions 233 extending in the longitudinal direction and spaced apart in the circumferential direction are formed.

The connection unit 153 includes a connection unit main body 153-1 which is aligned with the guide unit 110 and extends toward the casing 200 and has a pin hole 153-3 formed therein, And a plurality of connecting key portions 153-1 extending in the longitudinal direction and spaced apart in the circumferential direction.

The connection adapter 400 includes a first adapter 410 on one side in the lengthwise direction and a second adapter 420 on the other side in the longitudinal direction and the adapter key groove 423 and the adapter key 413, The connection adapter 400 is connected to the connection part 153 and the casing part 200. The connection adapter 400 has a first adapter part 410 on the side facing the casing 200 in the longitudinal direction, A second adapter unit 420 is provided.

The first adapter unit 410 includes a first adapter unit main body 411 and a plurality of adapter key units 411 provided on the outer surface of the first adapter unit main body 411 and projecting outwardly and extending in the longitudinal direction and spaced apart in the circumferential direction 413).

The second adapter unit 420 is hollow and comprises a second adapter unit main body 421 formed with an adapter pin hole 425. The second adapter unit main body 421 is recessed on the inner surface of the second adapter unit main body 421 and extends in the longitudinal direction, And the adapter key portion 413 is provided with an adapter key extension portion 413-1 extending in the circumferential direction and extending in the pull-out rotation direction at the end of the adapter key portion 413 facing the casing 200, Respectively.

At this time, the first adapter extension part 413-1 is inserted into the second connection part 230 of the casing 200 and the adapter key part 413 is inserted into the casing key groove part 233, Is inserted into the second adapter portion 420 so that the connection key portion 153-1 is inserted into the adapter key groove portion 423 and a pin (not shown) is inserted into the adapter pin hole 425 and the pin hole 153-3 And the connection unit 153 is coupled to the second adapter unit 420 so that the connection adapter 400 is provided between the casing 200 and the connection unit 153.

The adapter key extension portion 413-1 is inserted into the key groove extension portion 233-1 to prevent the adapter 400 from being separated from the casing 200 in the longitudinal direction when the casing 200 is rotated for withdrawing the casing 200. [

In addition, in the casing drawing step ST-140, the head part 150 is rotated backward while rotating reversely so that the casing 200 is pulled out from the perforations. When the engaging portion of the casing 200 adjacent to the casing 200 is exposed in the perforation, a pin (not shown) is removed from the engaging portion of the casing 200, and the head portion 150 is retracted, And is separated from the neighboring casing 200 located in the perforation. At this time, the withdrawal casing 200 connected to the head part 150 is clamped, the head part 150 is rotated in the perforating direction, and the adapter key extension part 413-1 is released from the keyway extension part 233-1 .

As a result, the head part 150 separated from the casing 200 moves backward and the connecting adapter 400 is also separated from the drawing casing 200, and the clamped drawing casing 200 is moved laterally.

The head part 150 is advanced to insert the first adapter part 410 of the connection adapter part 400 into the second connection part 230 of the neighboring casing 200 of the perforated part, The adapter key extension portion 413-1 is inserted into the adapter portion 233-1, and the head portion 150 is moved backward while the adapter key extension portion 413-1 is continuously rotated backward so that the casing 200 is pulled out from the perforation. By repeating this method, all the casings 200 located in the perforation are pulled out.

Hereinafter, the method of the present invention will be described again with respect to the configuration.

First, the second connection part 230 of the casing 200 is coupled to the connection part 153 of the head part 150. When the casing 200 advances along with the head part 150 by the head driving unit M and the front end of the casing 200 protrudes past the guide support part 111, the first connection part 220 of the casing 200 The bit 300 is coupled via the casing shoe 500.

The head part 150 is rotated and the head part 150 and the casing 200 are integrally advanced by the head part driving means M to advance the drilling operation. When the head part 150 is punched to reach the guide support part 111, the casing 200 is separated from the head part 150. [

After the head part 150 is retracted, the second connection part 230 of the added casing 200 is coupled to the connection part 153 of the head part 150. [ The casing 200 is advanced in unison with the head portion 150 by the head driving means M.

The first connection part 220 of the casing 200 to which the bit 300 is coupled to the first connection part 220 of the casing 200 and which is added to the second connection part 230 of the casing 200 located at the perforation .

The head portion 150 is rotated and the head portion 150 and all the casings 200 are advanced by the head driving means M and pushed in unison. Continue drilling while adding casing as above.

After the drilling operation, the cement milk is injected through the inlet 141 (sweep) of the rotary joint 140 for grouting. Thereafter, the casing 200 is separated from the head portion 150, and the head portion 150 is retreated. Then, the connection adapter 400 is connected, and the casing and the head part are connected to the connection adapter 400.

The head unit 150 is moved backward while rotating backward to retract the casing 200 and the bit 300 by about 20 cm to 30 cm. The head part 150 is detached from the connection adapter 400 and the head part 150 is retreated and the removing rod EB is pushed into the connection adapter 400 and the casing 200 to press the head part 150 from the casing shoe 500 The bit 300 is disconnected.

At this time, the connection adapter 400 is detached from the casing 200 and the connection adapter 400 and the head part 150 are integrally retracted to press the removal rods EB into the casing 200, (300).

The head part 150 and the casing 200 or the connection adapter 400 and the head part 150 are joined again and grooved by addition of simmered milk through the inlet (swivel) 141 of the rotary joint.

The head part 150 is separated from the connection adapter 400 or the connection adapter 400 is separated from the casing 200 and retracted.

The anchor body AB equipped with the packer PC is inserted into the casing 200 and the tip thereof is inserted into the bit groove.

The head part 150 and the connection adapter 400 are coupled to the casing 200 and the casing 200 is retracted while reversing the rotation direction of the casing 200, And grouting.

When the head part 150 is retracted to a position close to the backward position, the head part 150 is gripped by a casing clamping device (a separate clamping device) connected to the connection adapter 400, and is disposed at a position at a margin of the length of the second connection part 230.

The head portion 150 and the connection adapter 400 are rotated forward to retract the head portion 150 and the connection adapter 400.

The pins are removed from the second connecting portion 230 of the perforated direction leading end casing 200 and the first connecting portion 220 of the perforated direction rear end casing 200 and the clamped casing 200 is removed.

The head part 150 and the connection adapter 400 are advanced to insert the first adapter part 410 of the connection adapter 400 into the second connection part 230 of the casing 200. The head portion 150 and the connection adapter 400 are rotated in the pull-out direction so that the adapter key extension portion 413-1 is inserted into the key-hole extension portion 233-1 so as to be engaged with each other.

The head unit 150 and the connection adapter 400 are retracted while rotating in the reverse direction. At this time, the cement milk is injected through the inlet (swivel) 141 of the rotary joint 140 to grout.

When the head part 150 is retracted, a casing clamping (separate clamping) connected to the connection adapter 400 grasps the casing 200, and the casing clamping is performed at a position at a margin equal to the length of the second connection part 230 .

The head portion 150 and the connection adapter 400 are rotated forward to retreat the head portion 150 and the connection adapter 400. [

The pins are removed from the second connecting portion 230 of the perforated direction leading end casing 200 and the first connecting portion 220 of the perforated rear end casing 200 to remove the clamped casing 200, After repeating the above steps until the removal, insert the grouting injection pipe (GP) into the expansion packer (PC) and grout to expand the packer (PC). The expanding packer (PC) may expand to the perforated screw groove portion as shown in Figs. 16 and 17 to generate a larger frictional force.

Finally, after curing the charged cement milk, the anchor body AB is pulled and bonded to the gypsum board GG to complete the construction.

According to the present invention as described above, it is possible to facilitate the separation after the casing is pulled out by the structure using the key groove, the pressure grouting can be performed, the groove formed by the screw of the casing is retained even when the casing is pulled out, The reinforcing agent is added more widely to improve the soil reinforcement effect.

Claims

A guiding part provided on the body of the perforator so as to be adjustable in angle by a cylinder and a guide part provided on the guide part so as to be movable along the longitudinal direction of the guide part and having a connecting part on one side, A rotary joint having a head portion, a rotary joint provided at the head portion and having a charging port at one side thereof, a plurality of casings detachably attached to the head portion and detachably connected to each other and aligned with the guide portion, And a bit coupled to an end of the casing;

Wherein the connecting portion includes a connecting body protruding from the first side to be parallel to the guide portion and having a pin hole formed therein and a plurality of connecting key portions protruding outwardly from the outer surface of the connecting portion body and extending in the longitudinal direction and spaced apart in the circumferential direction;

The bit includes a bit head, a bit connection portion extending in the longitudinal direction of the guide portion from the bit head toward the casing, and a plurality of bit key portions protruding outwardly from the bit connection portion and extending in the longitudinal direction and spaced apart in the circumferential direction Lt; / RTI >

The casing is a hollow body having a spiral screw protruding outwardly on an outer surface thereof, and has a first connecting portion on one side in the longitudinal direction and a second connecting portion on the other side. The first connecting portion includes a first connecting pin And a plurality of casing key portions provided on the outer surface of the first connection body and protruding outwardly and extending in the longitudinal direction and spaced apart in the circumferential direction, the second connection portion being formed with a second connection pin hole, A plurality of casing keyways formed of a second connection body and recessed in the inner surface of the second connection body and extending in the longitudinal direction and spaced apart in the circumferential direction;

The connecting body is inserted into the second connecting body, the connecting key is inserted into the casing key groove, the first connecting body on the other side is inserted into the second connecting body of the other casing, and the casing key is inserted into the keying key groove And a bit is coupled to an end of the casing provided at the tip through a casing shoe.
[3] The apparatus of claim 1, further comprising a connecting adapter between the casing and the connecting portion when the casing is pulled out of the hole,

Wherein the casing key groove portion is concave and further comprises a key groove extension portion extending in a circumferential direction which is a direction of drawing out from the end of the first connection portion;

Wherein the first adapter unit is provided on the outer surface of the first adapter unit main body and the second adapter unit is provided on the outer side of the first adapter unit main body, And the second adapter portion is hollow and comprises a second adapter portion main body having an adapter pin hole formed therein and recessed in the inner surface of the second adapter portion main body A plurality of adapter key portions extending in the longitudinal direction and spaced apart from each other in the circumferential direction are formed, the adapter key portion having an adapter key extension portion extending in the circumferential direction in the pull-out rotation direction at the end portion facing the casing;

The first adapter extension portion is inserted into the second connection portion of the casing and the adapter key portion is inserted into the casing key groove portion and inserted into the second adapter portion so that the connection key portion is inserted into the adapter key groove portion, (Not shown) is inserted and the connection portion is coupled to the second adapter portion, and the connection adapter is provided between the casing and the connection portion;

Wherein the adapter key extension is inserted into the keyway extension during rotation for withdrawing the casing to prevent the adapter from being separated from the casing in the longitudinal direction.
[2] The apparatus according to claim 1, wherein a guide support portion having a guide hole penetrated in the longitudinal direction so that the casing is slidably inserted into the guide portion is provided at a distal end portion of the guide portion, Wherein the guide member has a length such that the leading end of the guide member does not extend beyond the guide support portion.
The connector according to claim 2, wherein the circumferential width of the adapter key portion including the adapter key extension portion is smaller than the circumferential width of the casing groove portion except for the keyway extension portion, the adapter key portion is slid in the longitudinal direction and inserted into the casing groove portion, Wherein the adapter key extension is inserted into the keyway extension.
A guiding part provided on the body of the perforator so as to be angularly adjustable by a cylinder, and a casing provided on the guide part so as to be movable along the longitudinal direction of the guide part and having a connection part on one side, An improved punching apparatus using a screw casing comprising a head part and a rotary joint provided at a connecting part of the head part to which the casing is coupled and having a charging port at one side;

A piercing step of forming a perforation hole in the ground by rotationally driving the casing while the casing is coupled to the head part and the head part is advanced along the guide part,

A bit separating step of separating bits provided at the tip of the casing after drilling to the target depth,

An anchor body assembling step of inserting an anchor body and coupling the tip to the bit,

A casing drawing step of drawing the casing while grouting,

And anchoring the anchor body after curing to fix the anchor body to the support plate;

Wherein a connection portion between the casing and the head portion is coupled to each other by the casing key groove portion and the connection key portion and is prevented from being longitudinally separated by the pin. In the casing pulling step, Anchor Anchor Method Using Improved Punching Device.
[6] The method according to claim 5, wherein in the boring step, the casing is rotated by advancing the head while advancing the head, the casing is detached from the head part connecting part for continuous boring, the head part is moved backward and the additional casing is connected to the connecting part of the head part, The other side of the additional casing is coupled to the line perforation casing by the casing key groove portion and the casing key portion, and the head portion continues to rotate while continuing the perforation;

And a casing for piercing to the target depth is repeatedly added to the piercing hole, so that an earth anchor method using the improved piercing apparatus using the screw casing.
[7] The method of claim 6, wherein in the casing drawing step, a connecting adapter is further provided between the casing and the head portion connecting portion;

The casing is a hollow body having a spiral screw protruding outwardly on an outer surface thereof, and has a first connecting portion on one side in the longitudinal direction and a second connecting portion on the other side. The first connecting portion includes a first connecting pin And a plurality of casing key portions provided on the outer surface of the first connection body and protruding outwardly and extending in the longitudinal direction and spaced apart in the circumferential direction, the second connection portion being formed with a second connection pin hole, A plurality of casing keyways formed of a second connection body and recessed in the inner surface of the second connection body and extending in the longitudinal direction and spaced apart in the circumferential direction;

Wherein the connection portion extends parallel to the guide portion and extends toward the casing and includes a connection body formed with a pin hole and a plurality of connection key portions protruding outwardly from an outer surface of the connection portion body and extending in the longitudinal direction and spaced apart in the circumferential direction;

The connection adapter includes a first adapter on one side in the longitudinal direction and a second adapter part on the other side in the longitudinal direction and is connected to the head connecting part and the casing by the adapter key groove part and the adapter key part respectively;

The connection adapter includes a first adapter unit on the side facing the casing in the longitudinal direction and a second adapter unit on the side facing the connection unit. The first adapter unit is provided on the outer surface of the first adapter unit main body and the first adapter unit main body And a second adapter portion main body having a plurality of adapter key portions protruding outwardly and extending in the longitudinal direction and spaced apart from each other in the circumferential direction, the second adapter portion being hollow and having an adapter pin hole, A plurality of adapter key portions extending in the longitudinal direction and spaced apart in the circumferential direction are formed, and the adapter key portion has an adapter key extension portion extending in the circumferential direction and in the pull-out rotation direction at the end portion facing the casing;

The first adapter extension portion is inserted into the second connection portion of the casing and the adapter key portion is inserted into the casing key groove portion and inserted into the second adapter portion so that the connection key portion is inserted into the adapter key groove portion, Is inserted to connect the connection portion to the second adapter portion, the connection adapter being provided between the casing and the connection portion;

Wherein the adapter key extension is inserted into the keyway extension when the casing is rotated for withdrawing the casing, thereby preventing the adapter from being separated from the casing in the longitudinal direction.
[7] The method of claim 7, wherein, in the step of pulling out the casing, the head part is reversed while being rotated backward, the casing is pulled out from the perforation, and when the engaging part of the casing and the adjacent casing is exposed in the perforation, The withdrawal casing detached from the neighboring casing located at the back of the pulled out casing is clamped and the withdrawal casing connected to the head portion is clamped and the head portion is rotated in the direction of perforation so that the adapter key extended portion is separated from the keyhole extension portion, The clamped drawn casing is laterally moved and the head portion is advanced to insert the first adapter portion of the connecting adapter portion into the second connecting portion of the perforated neighboring casing and reverse the rotation to insert the adapter key extending portion into the key hole extending portion The head is moved backward while the casing continues to rotate And drawn from, the earth anchor method using the improved drilling device using a screw, it characterized in that the casing is repeated until all of the casing in the drilling drawing.
[6] The apparatus of claim 5, wherein the anchor body is an anchor body having an expansion packer; Further comprising a packer expansion step of expanding the expansion packer (PC) by inserting a grouting injection pipe (GP) into the expansion packer after grooving the casing and grouting the grouting injection pipe (GP) Method.