JP2018193850A - Sheet pile fitting type auger drill device and boring method using the same - Google Patents

Abstract

To provide a sheet pile fitting type auger drill device which can reduce a construction cost and a construction period, and can improve working efficiency, and a boring method using the same.SOLUTION: There are provided: a sheet pile fitting type auger drill device 100 configured to stably install a sheet pile 10 simultaneously with a boring work using a hammer bit 140 by configuring so as to mount the sheet pile 10 using a clamp part outside of a steel pipe forming a casing 160 when the sheet pile is installed in a soft rock, granite and a boulder stone layer; and a boring method using the same. Accordingly, the sheet pile fitting type auger drill device 100 includes: a casing shoe 150 fixed to a lower end of the casing 160 by welding; a first clamp part 170 which fixes the sheet pile 10 and supports a load; and a second clamp part 180 which supports the sheet pile so as to prevent pulling of the sheet pile.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a sheet pile (steel sheet pile) auger drill apparatus and a drilling method using the same, and more specifically, a steel pipe that forms a casing when a sheet pile is installed in a soft rock, granite, and a meteorite layer. A sheet pile-attached auger drill device configured to be able to stably install a sheet pile simultaneously with a drilling operation using a hammer bit by being configured so that the sheet pile can be attached to the outside using a clamp portion, and the same It relates to the drilling method using

In general, various types of earth retaining methods are implemented for the purpose of preventing sediment from flowing down and the ground from collapsing during construction work or civil engineering work, or for the purpose of water shielding work.
As typical examples of such earth retaining methods, cast-in-placed-pile method, H-type PC pile retaining wall method, soil cement wall method, soil cement wall combined H type A PC pile retaining wall method can be used, and a sheet-pile method can be used as a method having both a water shielding function and a soil retaining function.

  Normally, the sheet pile (steel sheet pile) method is a method in which a sheet pile is forcibly inserted into the ground by direct striking with a vibration hammer using a crane. A sheet pile with high strength and excellent durability is used. When used, it can sufficiently fulfill the role of a retaining wall as a continuous wall type rigid body, and is excellent in water tightness at the contact portion, so that it is a construction method capable of obtaining a water shielding effect.

  Moreover, since there is a merit that the sheet pile can be pulled out and reused after the construction is completed, it is excellent in economic efficiency and workability, and has been widely used both domestically and abroad.

  The sheet pile method is a method of striking and embedding a sheet pile using a vibration hammer. As shown in FIG. 1, a known ordinary sheet pile 10 is necessary around a virtual installation line to be installed. Depending on the situation, they are alternately placed and inserted into the ground.

  In general, joints are formed at both ends of the sheet pile 10 so that the connection state between adjacent sheet piles is maintained.

  However, it is difficult to install a sheet pile on a hard ground such as soft rock, granite, and meteorite layer by striking with a vibration hammer alone. After drilling using an auger drill apparatus, the site | part in which the drilling was performed is substituted by sand, and then the method of installing a sheet pile is utilized.

  In other words, in order to obtain a stronger support force, with the use of an auger drill device, a large number of drill holes are drilled up to the bedrock part, and the sheet pile is passed through the drilled holes overlapped to the bedrock part. Can be embedded using a vibration hammer.

  However, when installing a sheet pile in such a hard ground area, it is required to perform three or more complicated steps to install one sheet pile, resulting in a time loss. This has the problem of causing delays in the construction period.

  Therefore, there is a demand for a method of installing a sheet pile and an apparatus for performing the method so as to reduce the man-hours as much as possible and reduce the time loss.

  On the other hand, the hammer bit of an auger drill device that drills in the ground is usually inserted into the steel pipe forming the casing and exposed to the lower end of the steel pipe when rotating and drilling, while rotating. When a hole wider than the diameter of the casing is drilled and the excavation is finished, it is pulled up again to collect the hammer bit.

  Such a conventional hammer bit receives an external force from a vibrating and rotating hammer drill and drills while rotating the hammer bit's housing bit in the clockwise direction, but at this time, the inside is smaller than the outer diameter of the housing bit. And a wing bit that is expanded during operation to form a metal base that is larger than the outer diameter of the housing bit and the casing.

  The inventor of the present invention, in such a hammer bit structure, when excavating the ground, Patent Document 1, Patent Document 2 so that drilling using a housing bit and drilling with a wing bit become easy and practical. Have proposed an improved hammer bit through Patent Document 3.

  The present invention has been devised to provide an apparatus capable of installing a sheet pile at the same time as the drilling operation using the auger drill apparatus with a hammer bit of Patent Documents 1 to 3 described above.

Korean Registered Patent Publication No. 10-087127 (Registered on November 24, 2008) Korean Registered Patent Publication No. 10-1229209 (Registered on January 28, 2013) Republic of Korea Registered Patent Publication No. 10-1434353 (Registered on August 18, 2014)

  The present invention has been devised in order to solve the above-described problems, and when installing a sheet pile on a soft rock, granite, or meteorite layer, a clamp portion can be formed outside the casing and the sheet pile can be attached. Thus, it is an object of the present invention to provide a sheet pile-attached type auger drill apparatus configured so that a sheet pile can be installed simultaneously with a drilling operation, and a drilling method using the same.

  In order to achieve the above-described object, a sheet pile-attached auger drill device and a drilling method using the same according to the present invention are provided in a drill connected to an auger for installing a sheet pile. Hammer bit having a wing bit which is provided with a rod and an air hammer and which is extended and reduced from the housing bit protruding from the lower end of the casing so as to be interlocked with the guide device. Is provided.

  Also, a casing shoe disposed so as to surround the housing bit and fixed to the lower end portion of the casing by a welding method, and a seat pile is fixed on one side of the upper portion of the casing to support the load and prevent the slipping And a second clamp part that supports the sheet pile from being pulled out on one side of the lower part of the casing.

  At this time, the first clamp portion includes a first fitting groove formed so as to penetrate one side of the upper portion of the sheet pile, and one of the upper portions of the casing so as to correspond to the first fitting groove. And a clamp pin that is inserted through the first insertion groove and the second insertion groove and fixedly supports the sheet pile. .

  Further, according to one embodiment, the second clamp portion forms a clamp groove on one side of the casing shoe, and penetrates a retaining hole on one side of the lower portion of the seat pile so as to correspond to the clamp groove. And a wedge clamp which is formed so as to protrude from the outside by an elastic member provided inside the clamp groove and is fitted in the retaining hole.

  Preferably, the end portion of the upper surface of the wedge clamp forms an inclined surface having a gradient from the inner upper direction toward the outer lower direction.

  On the other hand, if necessary, the clamp groove is formed horizontally on the casing shoe, or is formed with an inclination angle from the inner upper side to the outer lower side.

  Further preferably, the inner peripheral surface on the upper side of the retaining hole is positioned in contact with one side of the upper surface of the wedge clamp when the sheet pile is fixed and supported by the first clamp portion. It is characterized by that.

  On the other hand, according to another embodiment, the second clamp portion is formed with a clamp groove on one side of the casing shoe, and one end of the clamp groove is provided so as to be able to pivot on the hinge, and the other end is engaged with the other end. A hook-shaped clamp that forms a pawl and catches the lower end of the sheet pile, and an elastic member that is provided inside the clamp groove and pivots the hook-shaped clamp by elasticity.

  Furthermore, in the drilling method using such an auger drill device attached with a sheet pile, the lower end of the casing is fixed to the upper part of the casing shoe by a welding method, and the hammer bit is drilled with respect to the ground position to be drilled. A setup stage to be installed vertically, and a seat pile is fixed to the upper part of the casing while supporting a load using a first clamp part and is attached to a lower part of the casing to be supported using a second clamp part. A stage pile installation stage, and a drilling and sheet pile installation stage for excavating the ground while drilling to the set depth by rotating the hammer bit in one direction and conveying the installed sheet pile to the set depth; When the fixing of the first clamp part is released so that the upper part of the sheet pile is in a free state Furthermore, the sheet pile pushes the second clamp portion by the load to automatically release the second clamp portion, and the sheet pile is placed at the installation position, and the auger drill with the casing Recovering the device to the outside of the ground.

  As described above, the sheet pile mounting type auger drill device and the drilling method using the same according to the present invention can perform an integrated method of constructing a sheet pile at the same time as performing a drilling operation on the ground, thereby reducing the construction cost. And the construction period can be shortened.

  In addition, the sheet pile can be easily attached to and removed from the casing using the first clamp portion and the second clamp portion, and the sheet pile can be prevented from shaking during the drilling operation, and the sheet pile can be stably installed. It is possible to increase the working efficiency.

It is a figure which shows the sheet pile used for a normal sheet pile (Sheet-Pile) construction method. It is the schematic which shows the sheet pile attachment type auger drill apparatus which concerns on this invention. It is the schematic which shows the sheet pile attachment type auger drill apparatus which concerns on this invention. It is a figure which shows embodiment of the 2nd clamp part applied to the sheet pile attachment type auger drill apparatus which concerns on this invention. It is a figure which shows embodiment of the 2nd clamp part applied to the sheet pile attachment type auger drill apparatus which concerns on this invention. It is a figure which shows embodiment of the 2nd clamp part applied to the sheet pile attachment type auger drill apparatus which concerns on this invention. It is the schematic which shows installation of the sheet pile by the drilling method using the sheet pile attachment type auger drill apparatus which concerns on this invention.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a preferred embodiment of a sheet pile mounting type auger drill device and a drilling method using the same according to the present invention will be described in detail with reference to the accompanying drawings.

  Further, in the description of the present invention, the lower part and the lower part indicate the part located on the ground or the direction thereof in the operation using the auger drill device, and the upper part and the upper part indicate the part opposite to the part or the part thereof. The direction shall be indicated.

  Further, in describing the present invention, the central portion or the inner side indicates a portion near the central axis of the rotating auger drilling device or its direction, and the outer side indicates a portion away from the central axis or its direction. And

  Furthermore, in describing the present invention, specific descriptions of known functions or configurations related to published hammer bits disclosed in Patent Documents 1 to 3 may obscure the subject matter of the present invention. Omitted to not.

  First, referring to FIG. 2 and FIG. 3, the sheet pile-attached auger drill device 100 according to the present invention simultaneously performs the drilling operation using the hammer bit 140 and the drill hole H formed in the ground G of the sheet pile 10. It is configured so that it can be stably installed at a location.

  For this purpose, the above-described sheet pile-attached auger drill apparatus 100 is installed on an auger 4 installed on a normal crane 2 and a guide 3 having rails, but a drill rod 110 and an air hammer 120 connected to the auger 4. And has a wing bit 140b that goes in and out of a housing bit 140a projecting from the lower end of the casing 160 so as to be interlocked with the guide device 130 and expands or decreases the outer diameter of the perforated hole H. A hammer bit 140 is provided.

  Such a structure is a known structure applied to a normal auger drill apparatus 100, and a specific description thereof will be omitted in order not to obscure the gist of the present invention.

  On the other hand, the seat pile-attached auger drill device 100 according to the present invention is large in order to stably install the sheet pile 10 simultaneously with the drilling operation, and is largely divided into a casing shoe 150, a first clamp portion 170, and a second clamp. The unit 180 is provided.

  The casing shoe 150 has a tubular shape and has a structure that can be applied to a normal auger drill device. More specifically, the casing shoe 150 is disposed so as to surround the housing bit 140a of the hammer bit 140, and the casing 160 is disposed on the upper portion thereof. The lower end part or one side is integrated by the welding method.

  Further, the casing 160 is formed in a shape opened at the upper end portion or in a hole shape on one side of the upper portion so that the earth and sand generated in the drilling operation can rise along the casing 160 and be discharged to the outside. The discharge port 162 is provided.

  As described above, the casing 160 is provided integrally with the upper portion of the casing shoe 150, so that the casing 160 is provided integrally with the auger drill apparatus 100 and is transported together after the drilling operation to perform the next drilling operation.

  On the other hand, the sheet pile 10 is fixed so as to come into contact with one side of the outer surface of the casing 160. In order to stably fix the sheet pile 10, a load of the sheet pile 10 is applied to the upper portion of the casing 160. The first clamp part 170 is provided so as to prevent it from coming off while being supported.

  Preferably, the sheet pile 10 is fixed so as to contact one side of the outer surface of the casing.

  Specifically, the first clamp unit 170 is for attaching the sheet pile 10 to the outer surface of the casing 160 of the auger drill apparatus 100 before performing the drilling operation. With reference to FIG. 3, the clamp pin 171 is used. .

  The clamp pin 171 is used to attach the sheet pile 10 integrally to the casing 160 or to completely remove the sheet pile 10 from the casing 160 according to the operator's choice. As described above, the clamp pin 171 is simply fitted into the fitting groove in a pin shape, or the clamp pin 171 is completely removed from the fitting groove.

  However, according to other embodiments, such a clamp pin 171 is connected to an external power unit using a hydraulic or pneumatic cylinder as necessary, and is repeatedly fitted into the fitting groove by an external force. Needless to say, it may be configured to be removed.

  An embodiment of the first clamp unit 170 will be described in detail with reference to FIG.

  Specifically, according to one embodiment, the first clamp portion 170 includes a first insertion groove 11 formed so as to penetrate one side of the upper portion of the sheet pile 10, and a first insertion groove. 11, a second fitting groove 161 formed so as to penetrate one side of the upper portion of the casing 160, and the first fitting groove 11 and the second fitting groove 161. A clamp pin 171 for fixing and supporting the sheet pile 10 that is inserted and has a load is provided.

  Preferably, the size and shape of the first fitting groove 11 and the second fitting groove 161 are not particularly limited as long as the clamp pin 171 can be inserted and the sheet pile 10 can be fixed.

  Further, a large number of first clamp portions 170 are formed as necessary.

  On the other hand, the sheet pile-attached auger drill device 100 according to the present invention can be supported while suppressing the impact received by the sheet pile 10 attached to the casing 160 due to the shaking generated during the drilling operation as much as possible, and preventing it from coming off. A second clamp portion 180 formed on one side of the lower portion of the casing 160 is further provided.

  Specifically, the embodiment of the second clamp unit 180 will be described below with reference to FIGS. 4A and 4B and FIG. 5.

  First, referring to FIGS. 4A and 4B, according to one embodiment, the second clamp portion 180 forms a clamp groove 151 having a depth on one side of the casing shoe 150, and A retaining hole 12 corresponding to the clamp groove 151 is formed through one side of the lower portion of the sheet pile 10, and the elastic member 182 disposed inside the clamp groove 151 is formed so as to follow the shape of the groove 151. There are wedge clamps 181 and 181 ′ fitted into the retaining holes 12.

  At this time, the elastic member 182 is preferably a compression spring, and the wedge clamps 181 and 181 ′ are pushed outward so that the ends of the wedge clamps 181 and 181 ′ are fitted into the retaining holes 12.

  On the other hand, the clamp groove 151 is formed horizontally as shown in FIG. 4 (a), or has a gradient angle from the inner upper side to the outer lower side as shown in FIG. 4 (b). It is formed.

  Preferably, the outer ends of the wedge clamps 181 and 181 ′ fitted into the retaining holes 12 are inclined surfaces 181a and 181′a whose upper surfaces are inclined from the inner upper direction to the outer lower direction. Have.

  Further, the inner peripheral surface on the upper side of the retaining hole 12 of the sheet pile 10 is formed on the upper surface of the wedge clamps 181 and 181 ′ when the sheet pile 10 is fixed and supported by the first clamp part 170. It is located on one side, preferably in contact with one side of the inclined surfaces 181a, 181'a.

  As described above, the seat pile 10 is stably brought into contact with the frictional force by the contact portion between the retaining hole 12 and the wedge clamp 181 in spite of the swaying generated during the excavation work for forming the hole. The position is maintained without being removed from the casing 160.

  On the other hand, after the punching operation is completed, when the first clamp part 170 is released and the sheet pile 10 is removed from the casing 160, the sheet pile 10 is positioned on the bottom surface where the drilling H is performed along the casing 160. While generating a load downward.

  Further, the retaining hole 12 presses one side of the upper surface of the wedge clamps 181 and 181 ′, preferably the inclined surfaces 181a and 181′a, in accordance with the load applied downward by the sheet pile 10, and the second The wedge clamps 181 and 181 ′ of the clamp unit 180 are automatically pushed inward by overcoming the elastic force of the elastic member 182 provided in the clamp groove 151.

  Thereby, the 2nd clamp part 180 is released and the sheet pile 10 is installed.

  On the other hand, referring to FIG. 5, according to another embodiment, the second clamp part 180 forms a clamp groove 151 ′ on one side of the casing shoe 150, and one end is hinged to the clamp groove 151 ′. A hook-shaped clamp 183 that is disposed so as to be pivotable and that forms a locking claw 183a at the other end and the lower end of the sheet pile 10 is hooked, and a hook-shaped clamp 183 that is disposed inside the clamp groove 151 ′. And an elastic member 184 that is hinged by elasticity.

  With such a structure, the hook-shaped clamp 183 of the second clamp portion 180 is hinge-rotated to a position that always supports the lower end portion of the sheet pile 10 by the elastic force of the elastic member 184.

  In other words, when the sheet pile 10 is fixed and supported by the first clamp portion 170, the lower end portion of the sheet pile 10 is hooked and supported by the hook engaging claws 183a of the hook-shaped clamp 183, and the first pile portion 170 is supported. When releasing the clamp part 170, the hook-like clamp 183 overcomes the elastic force of the elastic member 184 according to the load of the sheet pile 10, and the sheet pile 10 is released from the second clamp part 180 while being hinged inward. Installed stably.

  As described above, the second clamp portion 180 shown in FIGS. 4A and 4B and FIG. 5 is a first clamp portion that fixes and supports the upper portion of the sheet pile 10 according to the shape and structure thereof. The lower part of the sheet pile 10 is supported together with 170 to prevent the sheet pile 10 from shaking due to an external force.

  Further, the auger drill apparatus in which the second clamp part 180 is automatically released by the load of the sheet pile 10 generated in the downward direction as the first clamp part 170 is released, and the drilling operation and the installation of the sheet pile are completed. Don't get in the way of collecting 100.

On the other hand, it is needless to say that a large number of second clamp parts 180 may be formed as necessary, similarly to the first clamp part 170.
Next, based on FIG. 6, the drilling operation using the sheet pile-attached auger drill device 100 according to the present invention and the installation procedure of the sheet pile 10 will be specifically described as follows.

  As shown in FIG. 6A, the auger drill apparatus 100 according to the present invention performs a drilling operation in a state where the sheet pile 10 is attached so as to contact the casing 160.

  The upper part is fixed and supported on the upper part of the casing 160 by the first clamp part 170, and the lower part is supported and supported on the lower part of the casing 160 by the second clamp part 180.

  In addition, the auger drill device 100 performs the drilling H while moving toward the lower side C while drilling the ground G by operation.

  Referring to FIG. 6B, after the drilling operation is completed, the clamp pin 171 of the first clamp unit 170 is released, and the sheet pile 10 is placed by a load.

  At this time, the wedge clamps 181 and 181 ′ or the hook-shaped clamp 183 of the second clamp unit 180 overcomes the elastic force of the elastic members 182 and 184 and releases the sheet pile 10 due to the load directed downward of the sheet pile 10.

  Further, as shown in FIG. 6C, the auger drill apparatus 100 is transported to the upper portion and removed with the sheet pile 10 installed, and the sheet pile 10 is again removed from the first clamp portion 170 and the second clamp portion. After mounting so as to contact the casing 160 using the clamp portion 180, a subsequent drilling operation is performed.

  More specifically, in the punching method using the sheet pile mounting type auger drill device according to the present invention, the setup stage and the seat pile attaching stage, the punching and the seat pile installing stage so that the sheet pile can be installed simultaneously with the punching operation. , And a sheet pile placing stage and a collecting stage.

  First, in the setup step, the lower end portion of the casing 160 is fixed to the upper portion of the casing shoe 150 by a welding method, and the hammer bit 140 is provided perpendicular to the position of the ground where the drilling H is to be performed.

  Further, at the stage of attaching the sheet pile, the sheet pile 10 is fixed to the upper part of the casing 160 while supporting the load using the first clamp part 170, and the second clamp part 180 is attached to the lower part of the casing 160. Use to attach to support.

  Further, in the drilling and seat pile installation stage, the hammer bit 140 is rotated in one direction to excavate the ground while drilling H to the set depth, and the attached sheet pile 10 is transported to the set depth. .

  Next, in the stage of placing the sheet pile, the first clamp part 170 is released so that the upper part of the sheet pile 10 is in a free state, and the sheet pile 10 is moved to the second clamp part by a load. The second clamp part 180 is automatically released by pressing 180, and the sheet pile 10 is placed at the installation position.

  Furthermore, the auger drill device with the casing is recovered outside the ground by the recovery step.

  The sheet pile 10 is installed while repeating the punching method as described above.

  Since the present invention described above can be variously replaced, modified and changed without departing from the technical idea of the present invention for those who have ordinary knowledge in the technical field to which the present invention belongs, the above-described embodiment The present invention is not limited to the attached drawings.

10: sheet pile 11: first fitting groove 12: retaining hole 100: sheet pile mounting type auger drill device 140: hammer bit 150: casing shoe 151, 151 ′: clamp groove 160: casing 161: second fitting Insertion groove 170: first clamp part 171: clamp pin 180: second clamp part 181, 181 ′: wedge clamp 182, 184: elastic member 183: hook-shaped clamp 183a: locking claw

Claims (7)

The lower end of the casing (160) is provided with a drill rod (110) and an air hammer (120) connected to the auger (4) for installing the seat pile (10), and interlocked with the guide device (130). In an auger drill apparatus provided with a hammer bit (140) having a wing bit (140b) that goes in and out of a housing bit (140a) projecting from the boss and expands or decreases the outer diameter of the perforated hole (H) ,
A casing shoe (150) disposed so as to surround the housing bit (140a) and fixed to a lower end portion of the casing (160) by a welding method;
A first clamp part (170) for securing the sheet pile (10) on one side of the upper part of the casing (160) and preventing the release while supporting the load;
A sheet pile mounting type auger drill device comprising a second clamp part (180) for supporting the sheet pile (10) so as not to be pulled out on one side of the lower part of the casing (160). . The first clamp part (170)
The first fitting groove (11) formed so as to penetrate one side of the upper part of the sheet pile (10), and the casing (160) so as to correspond to the first fitting groove (11). A second fitting groove (161) formed so as to penetrate one side of the upper part,
A clamp pin (171) that is inserted through the first fitting groove (11) and the second fitting groove (161) to fix the seat pile (10) and supports the load is provided. The sheet pile mounting type auger drill device according to claim 1. The second clamp part (180)
Forming a clamp groove (151) having a depth on one side of the casing shoe (150);
A retaining hole (12) is formed through one side of the lower portion of the sheet pile (10) so as to correspond to the clamp groove (151),
It comprises a wedge clamp (181, 181 ′) that is located outside by being inserted into the retaining hole (12) by being protruded outward by an elastic member (182) disposed inside the clamp groove (151). The sheet pile mounting type auger drill apparatus according to claim 1, wherein the sheet pile mounting type auger drill apparatus is provided.   4. The clamp groove (151) according to claim 3, wherein the clamp groove (151) is formed horizontally on the casing shoe (150), or is formed with a gradient angle from the inner upper side to the outer lower side. Seat pile mounted auger drill device.   The inner peripheral surface on the upper side of the retaining hole (12) is one of the upper surfaces of the wedge clamps (181, 181 ′) when the sheet pile (10) is fixed by the first clamp part (170). The seat pile-attached auger drill device according to claim 4, wherein the auger drill device is positioned in contact with the side of the sheet pile. The second clamp part (180)
Forming a clamp groove (151 ′) having a depth on one side of the casing shoe (150);
One end of the clamp groove (151 ′) is pivotably hinged, and a hooking clamp (183a) is formed on the other end to hook the lower end of the sheet pile (10). 183),
The elastic member (184) provided inside the clamp groove (151 ') and pivoting the hook-shaped clamp (183) by using elasticity is provided. Sheet pile mounted auger drill equipment. A sheet pile mounting type auger drill device according to any one of claims 1 to 6,
A setup stage in which the lower end of the casing (160) is fixed to the upper part of the casing shoe (150) by a welding method, and the hammer bit (140) is installed perpendicularly to the position of the ground to be drilled (H);
The sheet pile (10) is fixed to the upper part of the casing (160) while supporting the load using the first clamp part (170), and the second clamp part (180) is fixed to the lower part of the casing (160). A mounting stage of the seat pile that is mounted to support using,
Drilling and rotating the hammer bit (140) in one direction to excavate the ground while drilling (H) to a set depth, and transporting the attached sheet pile (10) to a set depth Stages,
The first clamp part (170) is released so that the upper part of the sheet pile (10) is in a free state, and the sheet pile (10) pushes the second clamp part (180) by a load. A sheet pile placing step of automatically releasing the second clamp part (180) and placing the sheet pile (10) in an installation position;
And a step of recovering the auger drill device with a casing to the outside of the ground, and a drilling method using a sheet pile-attached auger drill device.

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