KR102098336B1 - Sd nailing method - Google Patents

Abstract

The present invention rotates and inserts an excavation device including a hole having a hollow shape and a bit formed by inserting into the front of the perforation rod and then rotatingly coupled to the hollow of the perforation rod to form an injection hole for injecting grout into the ground. While injecting the grout into the ground through the injection hole of the hole and the hollow of the perforated rod pressurized; Inserting a nail into the hollow of the perforated rod, screwing the front end of the nail to the bit, and separating the bit from the perforated rod; And additionally injecting grout into the space and surrounding ground of the perforated rod that is drawn out by using the hollow of the perforated rod while withdrawing the perforated rod; relates to an SD nailing method comprising: By inserting the grout at the same time as the insertion, it is possible to provide an effect of minimizing the settlement and displacement of the ground.

Description

SD nailing method {SD NAILING METHOD}

The present invention relates to the SD nailing method, in particular, by inserting the nail and grouting the ground at the same time to increase the structural stability of the ground, and by firmly combining the nail and the bit, the nail fixing ability of the nail is improved. It's about the construction method.

In the case of construction of roads or apartment complexes, steep slopes frequently occur, and the soil nail method is widely used as a method of stabilizing the steep slopes.

In the general soil nail method, a shotcrete is placed on the excavation surface to protect the excavation surface, and then a hole is drilled at an appropriate depth and interval. Subsequently, a hose for injecting nail and grout into each hole is inserted together so that the rear end of the nail protrudes from the surface of the excavation surface. Subsequently, grout is injected into the perforated hole through a hose, and a shiatsu plate for fixing the wire mesh and nail is installed on the shotcrete surface and then fixed. This process increases the shear strength of the ground by means of nails and grout to suppress the displacement of the ground expected after completion of construction. The ground stabilization method using such a nail allows the ground in the region reinforced by the soil nail to act as an integral retaining wall and maintains the stability of the inclined ground.

However, the soil nail method is a process in which a perforation hole is drilled, the ground around the perforation hole is settled or displaced, and thus the structural stability of the ground is greatly reduced. In addition, it is difficult to secure the design depth of the nail because the collapsed ground soil flows into the front end of the perforation hole, and if you want to secure the insertion depth of the nail by removing the overflowed soil, you have to redo the work and at the same time settle the ground. And the construction is delayed. In addition, since the grout is filled into the collapsed ground, the amount of grout used increases, which is uneconomical.

Methods for solving the above problems are disclosed. As an example, Korean Patent Application Publication No. 10-2004-98837, 'Multipurpose Improved Soil Nail Anchor Construction Method' is disclosed (see FIGS. 1A to 1B). This conventional technology shortens the construction stage and replaces the perforated excavation main body with a sole nail anchor to replace the rebar anchor, thereby immediately completing the injection of high-strength cement milk, simplifying the cement milk grouting operation in the perforated hole, simplifying the injection work , It is a high-rigidity material so that it is sufficiently supported on rocky ground or earth pressure.

However, the prior art has a problem in that the high cost high-strength excavation pipe 4 must remain in the drilling hole, thereby increasing the construction cost, and the cement milk grouting operation is performed only once when the main pipe is injected, resulting in insufficient grouting.

As another conventional technique, Korean Patent Registration No. 10-573914, 'Nailing method using a nail for reinforcing the ground', filed by the inventor of the present application and has been filed is disclosed (see FIGS. 2A to 2C). In this prior art, 'the resin is impregnated with glass fiber to form a hollow shape, a spiral protrusion is formed on the outer circumferential surface thereof, and a nailing method using a nail coated with a protective material for protecting damage from the glass fiber is provided in the surface. , Excavating the ground 100 to a stable height that the excavation surface is independent; Drilling a insertion hole 110 at a predetermined depth on the excavation surface by using a hollow auger having a helical braid 11 formed on the outer circumferential surface of the bit 30 detachably coupled to the front end portion; Separating the bit (30) from the auger while entering the nail (40) through the hollow of the auger and engaging the tip of the nail (40) with the bit (30); The step of filling the filling material 60 in the outer circumferential surfaces of the insertion hole 110 and the nail 40 through which the auger is removed while removing the auger from the insertion hole 110 by rotating the auger in reverse. As a nailing method using a nail for reinforcing the ground (see claim 2), it is lightweight and easy to carry and handle, improving workability, reducing wear of the braid during drilling, and placing the nail in the center of the insertion hole. It aims to be able to be placed and employ environmentally friendly fillers.

However, the prior art still has a problem in that displacement occurs in the ground by drilling an insertion hole with an auger having a braid. In addition, since the filling material is injected while the auger is withdrawn after the perforation is completed, relaxation of the ground cannot be completely prevented. In addition, due to the nature of the structure of combining the bit 30 and the nail 40, there is a problem that the fixing force of the bit cannot be sufficiently utilized.

Patent 1: Republic of Korea Patent Publication No. 10-2004-98837 Patent 2: Republic of Korea Registered Patent Publication No. 10-573914

The present invention is to solve the above problems, and by inserting a bit into the ground and injecting a grout at the same time, to provide an SD nailing method that can completely prevent the settlement and displacement of the ground.

In addition, by not excavating a nail ball, there is no waste of grout, and an economical SD nailing method is provided.

In addition, the nail ball is not excavated and grout is injected to provide an SD nailing method that can secure the same quality regardless of the operator's ability.

In addition, it is intended to provide an SD nailing method having excellent ground reinforcement effect by additionally injecting a grout while drawing a perforated rod.

In addition, by not providing a grout injection hose separately, it is intended to provide an SD nailing method that increases productivity due to a simple nail structure.

In addition, by using a conventional material, such as reinforcing bar as a nail, to provide an SD nailing method that can reduce the construction cost.

In addition, the front end of the nail is screwed to the bit to provide an SD nailing method having an excellent anchoring effect of the nail by the bit.

In addition, by providing a tip rod between the perforated rod and the bit, it is possible to use an ordinary rod having a low price, and to provide an economical SD nailing method.

The SD nailing method according to an example of the present invention includes a hollow perforated rod and a bit formed by inserting into the front of the perforated rod and rotating to be coupled and connected to the hollow of the perforated rod to form an injection hole for injecting grout Pressing the grout into the ground through the hollow of the perforated rod and the injection hole of the bit while rotating and inserting the excavation device into the ground; Inserting a nail into the hollow of the perforated rod, screwing the front end of the nail to the bit, and separating the bit from the perforated rod; And additionally injecting grout into the space and surrounding ground of the perforated rod that is drawn out by using the hollow of the perforated rod while withdrawing the perforated rod.

In addition, the perforated rod includes an insertion groove cut in the rearward direction in the front and a locking groove with an expanded width inside the insertion groove, and the bit is inserted into the insertion groove of the punching rod on the outside and then into the locking groove. It may be characterized in that it comprises a locking key to hang.

In addition, an elastic piece is provided in the insertion groove of the perforated rod or the locking key, and the elastic piece may be characterized in that the bit is prevented from deviating from the punching rod by causing the locking key to move toward the locking groove. .

In addition, the width of the locking groove gradually increases toward the front toward the side, and the locking key is formed to correspond to the shape of the locking groove, so that the locking key is prevented from falling out after being inserted into the locking groove. You can.

In addition, a rubber, silicone or synthetic resin coating may be formed on one side of the contact bonding surface of the perforated rod and the bit to prevent leakage of the grout.

In addition, another embodiment of the SD nailing method according to an example of the present invention is a hollow-shaped perforated rod, a hollow-shaped tip rod screwed to the front of the perforated rod, and rotated after being inserted in front of the tip rod By connecting and inserting an excavation device including a bit formed with an injection hole for injecting a grout connected to the hollow of the tip rod into the ground while being inserted into the ground through the hole of the perforated rod and the tip rod and the hole of the bit Pressure injection of grout; Inserting a nail into the hollow of the perforated rod and the tip rod, screwing the front end of the nail to the bit and separating the bit from the tip rod; And additionally pressurizing and injecting the grout into the space of the perforated rod and the distal end of the perforated rod and the distal end of the distal end that is drawn out by using the hollow of the perforated rod and the distal end while withdrawing the perforated rod and the distal end rod can do.

In addition, the front end rod includes an insertion groove that is cut in the rearward direction in the front and a locking groove having an expanded width inside the insertion groove, and the bit is inserted into the insertion groove of the front end rod and then inserted into the locking groove. It may be characterized in that it comprises a locking key to hang.

In addition, an elastic piece is provided in the insertion groove of the tip rod or the locking key,

The elastic piece may be characterized by preventing the bit from deviating from the tip rod by causing the locking key to move toward the locking groove.

In addition, the width of the locking groove gradually increases toward the front toward the side, and the locking key is formed to correspond to the shape of the locking groove, so that the locking key is prevented from falling out after being inserted into the locking groove. You can.

In addition, a rubber, silicone, or synthetic resin coating may be formed on one side of the contact bonding surface of the tip rod and the bit to prevent leakage of the grout.

In addition, an extension rod is additionally connected to the rear end of the perforation rod by using a connection portion, and the connection portion is formed integrally with the inner ring having the same diameter and thickness as the perforation rod and extension rod, and outside the inner ring It characterized in that it comprises an outer ring that is further extended in length at both ends of the ring, the outer ring is formed with a screw on the inner surface of the portion of the extended length is coupled to the screw formed on the outer surface of the perforated rod and the extension rod. You can.

In addition, the nail further includes an anchor key that is installed at regular intervals, and the anchor key is coupled to the nail, an extension that extends in width in a trumpet shape from the coupling portion to the rear, and the extension portion. Separately and includes a wing portion extending apart and spaced apart from each other, the wing portion may be characterized in that the inner diameter is smaller than the inner diameter of the perforated rod, and the outer side is larger than the inner diameter of the perforated rod.

The present invention can prevent the settlement and displacement of the ground completely by injecting a grout at the same time as inserting a bit into the ground.

In addition, it is economical because there is no waste of grout by not excavating the nail ball.

In addition, the same quality can be ensured regardless of the operator's ability by injecting the grout without excavating the nail ball.

In addition, it is excellent in the reinforcement effect of the ground by additionally injecting the grout while drawing the perforated rod.

In addition, by not having a grout injection hose separately, the nail structure is simple and productivity is increased.

In addition, the construction cost can be saved by using a conventional material such as rebar as a nail.

In addition, since the front end of the nail is screwed with the bit, the ground fixing effect of the nail by the bit is excellent.

Further, by providing a perforated rod and a fine tip rod between bits, an ordinary rod with low cost can be used.

1 and 2 are drawings of prior art.
3A is a view showing a state in which a grout is pressurized and injected into the ground simultaneously with insertion in the SD nailing method according to an example of the present invention.
3B is a view showing a state in which the process of injecting and grouting at the same time as the insertion proceeds to a planned depth.
3C is a view showing a state of inserting a nail into the hollow of the perforated rod.
3D is a view showing a state in which the nail is screwed to the bit.
3E is a view showing a state in which a grout is additionally pressurized and injected into the ground by using the hollow of the perforated rod at the same time withdrawing the perforated rod.
3F is a view showing a state in which the perforated rod is completely drawn out of the ground, and at the same time, the grout is additionally injected into the space where the perforated rod was drawn out and the surrounding ground.
4A is an exploded perspective view of a bit, a perforated rod, and a nail according to an example of the present invention.
4B is a cross-sectional view of a bit and a perforated rod according to an example of the present invention, and a detailed connection diagram of the perforated rod and the extended rod.
4C is a view showing a state in which a bit and a perforated rod are combined according to an example of the present invention.
5A is an exploded perspective view of a bit, a tip rod, a drill rod, and a nail according to an example of the present invention.
5B is a cross-sectional view of a bit and a tip rod and a perforated rod according to an example of the present invention, and a detailed connection diagram of the perforated rod and the extended rod.
5C is a view showing a state in which a bit, a tip rod, and a perforation rod are combined according to an example of the present invention.
6A is a perspective view showing a state in which an elastic piece is provided on a tip rod according to an example of the present invention.
6B is a perspective view showing a state in which a locking groove and an insertion key according to an example of the present invention are formed in a trapezoidal shape.
6C is a perspective view showing a state in which an anchor key is installed on a nail according to an example of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing embodiments of the present invention, when it is determined that detailed descriptions of related well-known configurations or functions interfere with understanding of the embodiments of the present invention, detailed descriptions thereof will be omitted.

In addition, in describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, the component may be directly connected to or connected to the other component, but another component between each component May be "connected", "coupled" or "connected".

Hereinafter, the SD nailing method, which is an example of the present invention, will be described in detail with reference to FIGS. 3 to 6.

The SD nailing method according to an example of the present invention is inserted into the front of the perforated rod 10 and the perforated rod 10, and then rotates to be coupled and connected to the hollow of the perforated rod 10 to grout While inserting the drilling device including the bit 20 formed with the injection hole 22 for injecting it into the ground, through the hollow of the perforated rod 10 and the injection hole 22 of the bit 20 into the ground Pressure injection of grout; Step of inserting the nail 30 into the hollow of the perforated rod 10 to screw the front end portion of the nail 30 to the bit 20 and separating the bit 20 from the perforated rod 10 ; And additionally injecting grout into the space of the perforated rod 10 and the surrounding ground of the perforated rod 10 drawn out while using the hollow of the perforated rod 10 while drawing the perforated rod 10.

In the step of injecting the grout under pressure, the bit 20 in which the injection hole 22 is formed in front of the hollow rod 10 is combined. Thereafter, a separate device is used to rotationally insert into the ground, and at the same time, the grout is pressed and injected. In this step, by inserting the perforated rod 10 combined with the bit 20 into the ground and simultaneously injecting the grout, the settlement and displacement of the surrounding ground are completely prevented, and at the same time, the waste of the grout is prevented. It can be constructed with the same quality regardless of ability.

When inserting the perforated rod 10 and the bit 20, rotation is possible in any direction, but in the following, description will be given as an example of rotating left or counterclockwise.

The perforated rod 10 is a hollow tube with a hollow shape to allow grout to be injected through the hollow, and transmits rotational force and pressure input to the bit 20 coupled to the front end to be inserted forward. In addition, the hollow of the perforated rod 10 is used as a space for inserting the nail 30 after the bit 20 is completely inserted. A plurality of perforated rod 10 may be connected to each other by screws. That is, it is provided with a perforated rod 10 of an appropriate length, it can be used in connection with each other according to the insertion depth of the nail (30).

As the part where the bit 20 is coupled to the front of the perforated rod 10, an insertion groove 12 cut into the rear side is formed, and the inside of the insertion groove 12, that is, the width of the insertion groove 12 in the rear side The extended locking groove 14, that is, the locking groove 14 in the right direction of the insertion groove 12 may be formed.

The insertion groove 12 is a passage through which the locking key 24 formed in the bit 20 to be described later is inserted, and the locking groove 14 is seated by rotation of the locking key 24 inserted into the insertion groove 12. Space. That is, the locking key 24 is inserted into the insertion groove 12 and then rotated to be located in the locking groove 14 to prevent it from falling out of the punched rod 10. According to the drawing, the locking groove 14 is formed on the right side of the insertion groove 12. That is, the perforated rod 10 to which the bit 20 is coupled is rotated counterclockwise to the left, in this case, the locking key 24 is rotated in the state inserted into the locking groove 14 formed on the right side to rotate the bit ( 20) is prevented from falling out of the perforated rod 10 and insertion proceeds to the ground. The insertion groove 12 is formed to a width that can be inserted into the insertion key, and the locking groove 14 is sized such that it can be inserted while the insertion key is rotated.

As described above, the locking key 24 may be protruded outside the bit 20. That is, the insertion groove 12 and the locking groove 14 are formed in the front of the drilling rod 10 for the combination of the drilling rod 10 and the bit 20, the locking key 24 on the outside of the bit 20 ) May be formed. Therefore, the bit 20 is quickly coupled to the puncture rod 10 by inserting it into the front of the puncture rod 10 and then rotating, preventing departure from the puncture rod 10 during rotational insertion in the ground, described later. It can be easily separated from the perforated rod (10). The locking key 24 need not be formed at the rear end of the bit 20. Rather, the locking key 24 may be advantageously formed in front of a certain portion at the rear end of the bit 20, that is, the inner surface of the perforated rod 10 and the outer surface of the bit 20 are properly in contact with each other so that the perforated rod ( 10) It is possible to prevent the outflow of grout injected through the bit 20. The engaging groove 14 is gradually increased in width toward the right, that is, toward the clockwise direction, and the engaging key 24 may be formed to correspond to the shape of the engaging groove 14. That is, the locking groove 14 is formed in a trapezoidal shape in which the width gradually increases toward the right, and the locking key 24 may also be formed in a trapezoidal shape similar to the locking groove 14. In this case, the maximum width in the front-rear direction of the locking key 24 should be slightly smaller than the minimum width in the front-rear direction of the locking groove 14. The shape of the locking groove 14 and the locking key 24 prevents the locking key 24 from falling out after being inserted into the locking groove 14. The width in which the locking groove 14 and the locking key 24 increase toward the right direction is sufficient even in a small amount. That is, when the locking key 24 is inserted into the insertion groove 12 and slightly rotated toward the locking groove 14, the separation of the locking key 24 can be prevented. That is, after the bit 20 is inserted into the perforated rod 10, since the perforated rod 10 rotates counterclockwise, that is, to the left, departure of the bit 20 is prevented. Even if the bit 20 is about to escape in the forward direction, the locking key 24 moves to the right direction of the locking groove 14 due to the inclination of the front portion of the locking groove 14, so that the fall can be prevented.

An elastic piece 56 may be provided in the insertion groove 12 of the perforated rod 10. The elastic piece 56 may be provided inside the insertion groove 12, that is, on the rear side. The elastic piece 56 slightly moves the locking key 24 inserted into the insertion groove 12 toward the locking groove 14, and then the insertion key is prevented from falling out, in particular, the front slope of the locking groove 14 Can completely prevent the locking key 24 from falling out. The elastic force of the elastic piece 56 is sufficient even in a small amount. That is, the locking key 24 can be prevented from falling out only by being positioned on the side of the locking groove 14 with a slight smile. The elastic piece 56 may be provided on the locking key 24 of the bit 20 (not shown). Therefore, it is difficult for the locking key 24 to escape from the locking groove 14 unless the operator applies artificial force.

A thin cover may be formed on outer surfaces of the insertion groove 12 and the locking groove 14. That is, the insertion groove 12 and the locking groove 14 may be formed only inside the perforated rod 10. This prevents the inflow of soil and the like into the insertion groove 12 and the locking groove 14 in the process of inserting into the ground, and can also facilitate the separation of the bit 20.

A rubber, silicone or synthetic resin coating may be formed on one side of the surface where the perforated rod 10 and the bit 20 are in contact, that is, the inner surface of the main road 10 and the outer surface of the bit 20. This coating can prevent the grout from leaking by sealing the bonding surface.

Screws may be formed inside the bit 20 and outside the front end of the nail 30 to be described later. The screw is a right screw, that is, a screw coupled to the bit 20 when rotating the nail 30 to the right. This allows the nail 30 to be firmly coupled to the bit 20 coupled to the perforated rod 10, and then rotated to the left in the steps described below to separate the bit 20 from the perforated rod 10. Have it.

The step of separating the bit 20 from the perforated rod 10 inserts the nail 30 into the hollow of the perforated rod 10, and rotates the nail 30 to the right, thereby making the front end the bit 20. After being screwed with, the bit 20 can be separated from the perforated rod 10 by slightly rotating it again to the left and then pushing forward or pulling the perforated rod 10 backward.

The nail 30 may be used, such as a conventional circular reinforcing bar, release bar, steel bar. That is, the nail 30 can be used by forming a screw in front of a normal reinforcing bar or the like.

In this embodiment, the perforated rod 10 is re-used after being withdrawn, and the nail 30 can reduce construction cost by using ordinary reinforcing bars or the like.

Anchor keys 40 may be installed on the nail 30 at regular intervals. The anchor key 40 is a cylindrical coupling portion 41 that is coupled to the nail 30, an extension portion 43 that extends in a trumpet shape toward the rear from the coupling portion 41, the extension portion ( It may include a wing portion 45 that is separated from 43) and spaced apart from each other at regular intervals. The inner side of the wing portion 45 is smaller than the inner diameter of the perforated rod 10, the outer side is preferably formed larger than the inner diameter of the perforated rod (10). That is, when the anchor key 40 enters the inner side of the perforated rod 10, the wing portion 45 can be reduced to fit the inner diameter of the perforated rod 10, and the nail 30 is a bit ( 20) by being coupled and the perforated rod 10 is drawn out, the reduced wing portion 45 is expanded so that the nail 30 can be more firmly settled on the ground. The coupling part 41 may be coupled to the nail 30 by welding or the like. The coupling portion 41 and the expansion portion 43 may have a shape in which one side is cut.

In the step of additionally injecting the grout into the ground, the perforated rod 10 is drawn out by using the hollow of the perforated rod 10 while drawing the perforated rod 10 separated from the bit 20 to the outside of the ground. In this step, grout is additionally injected into the space and surrounding ground. Since the surrounding ground is tightly filled with the grout injected in the above-described step (first step), the grout that is additionally injected can be injected deep into the ground without leaking to the outside. Therefore, the surrounding ground can achieve a more enhanced effect than the original ground.

Another embodiment of the SD nailing method according to an example of the present invention is a hollow-shaped perforated rod 10, a hollow-shaped tip rod 50 screwed to the front of the perforated rod 10, and the tip After inserting into the front of the rod 50, it is rotated to be coupled, and it is connected to the hollow of the tip rod 50 and rotates an excavation device including a bit 20 formed with an injection hole 22 for injecting grout into the ground. Pressing the grout into the ground through the injection hole 22 of the bit 20 and the hollow of the drill rod 10 and the tip rod 50 while inserting; After inserting the nail 30 into the hollow of the perforated rod 10 and the tip rod 50, the front end of the nail 30 is screwed to the bit 20, and then the bit 20 is connected to the tip rod ( 50); And the space and surroundings of the perforated rod 10 and the distal end rod 50 drawn out by using the hollow of the perforated rod 10 and the distal end rod 50 while withdrawing the perforated rod 10 and the distal end rod 50. It may include; the step of further pressurizing the grout into the ground.

This embodiment is different from the above-described example in that the tip rod 50 is further provided between the bit 20 and the punched rod 10.

The same parts of the present embodiment and the above-described embodiment may be omitted. The omitted part can be applied by analogy with the description of the above-described embodiment.

The step of injecting the grout of the present embodiment is screwed to the front end rod 50 of the hollow shape in front of the hollow-shaped perforated rod 10, and the injection hole 22 is formed in front of the front end rod 50 After inserting the bit 20, it is rotated and combined. Thereafter, the bit 20, the tip rod 50 and the perforation rod 10 are inserted into the ground by rotation, and the grout is pressed and injected.

As the part where the bit 20 is coupled to the front of the tip rod 50, an insertion groove 52 cut in the rear direction is formed, and the inside of the insertion groove 52, that is, the width of the insertion groove 52 in the rear side The extended locking groove 54, that is, the locking groove 54 in the right direction of the insertion groove 52 may be formed.

The insertion groove 52 is a passage through which the locking key 24 formed in the bit 20 is inserted, and the locking groove 54 is a space where the locking key 24 inserted into the insertion groove 52 is rotated and settled. . That is, the locking key 24 is inserted into the insertion groove 52 and then rotated to prevent the position of the locking groove 54 from falling out of the tip rod 50. According to the drawing, the locking groove 54 is formed on the right side of the insertion groove 52. That is, the front end rod 50 to which the bit 20 is coupled rotates counterclockwise to the left, in this case, the locking key 24 is rotated in the state inserted into the locking groove 54 formed on the right side to rotate the bit ( 20) is prevented from falling off the tip rod 50 and insertion proceeds to the ground. Insertion groove 52 is formed to a width that can be inserted into the insertion key, the locking groove 54 is the size of a degree that can be inserted while the insertion key is rotated.

A locking key 24 may be protruded outside the bit 20. That is, the insertion groove 52 and the engaging groove 54 are formed in front of the leading rod 50 for the coupling of the leading rod 50 and the bit 20, the locking key 24 on the outside of the bit 20 ) May be formed. Therefore, the bit 20 is quickly coupled to the tip rod 50 by inserting it into the front of the tip rod 50 and then rotating, preventing the departure from the tip rod 50 during rotational insertion in the ground, preventing the tip It can be easily removed from the rod 50. The locking key 24 need not be formed at the rear end of the bit 20. Rather, the locking key 24 may be advantageously formed in front of a certain portion at the rear end of the bit 20, that is, the inner surface of the tip rod 50 and the outer surface of the bit 20 are properly in contact with each other, so that the tip rod ( It is possible to prevent the outflow of grout injected through the 50) and the bit 20. The engaging groove 54 may be formed to correspond to the shape of the engaging groove 54, the width gradually increases toward the right, that is, toward the clockwise direction, and the engaging key 24 is formed. That is, the locking groove 54 is formed in a trapezoidal shape in which the width gradually increases toward the right, and the locking key 24 may also be formed in a trapezoidal shape similar to the locking groove 54. In this case, the maximum width in the front-rear direction of the locking key 24 should be slightly smaller than the minimum width in the front-rear direction of the locking groove 54. The shape of the locking groove 54 and the locking key 24 prevents the locking key 24 from falling out after being inserted into the locking groove 54. A small amount is sufficient for the width of the locking groove 54 and the locking key 24 to increase toward the right. That is, when the locking key 24 is inserted into the insertion groove 52 and slightly rotated toward the locking groove 54, the separation of the locking key 24 can be prevented. That is, after the bit 20 is inserted into the tip rod 50, the tip rod 50 rotates counterclockwise, that is, to the left, thus preventing the bit 20 from deviating. Even if the bit 20 is about to escape in the forward direction, the locking key 24 moves to the right direction of the locking groove 54 due to the inclination of the front portion of the locking groove 54, so that it can be prevented from falling out.

An elastic piece 56 may be provided in the insertion groove 52 of the tip rod 50. The elastic piece 56 may be provided inside the insertion groove 52, that is, on the rear side. The elastic piece 56 slightly moves the locking key 24 inserted into the insertion groove 52 toward the locking groove 54, and then the insertion key is prevented from falling out, especially in front of the locking groove 54. Can completely prevent the locking key 24 from falling out. The elastic force of the elastic piece 56 is sufficient even in a small amount. That is, the fallout can be prevented by simply positioning the locking key 24 at the locking groove 54 side. The elastic piece 56 may be provided on the locking key 24 of the bit 20 (not shown). Therefore, it is difficult for the locking key 24 to escape from the locking groove 54 unless the operator applies artificial force.

A thin cover may be formed on outer surfaces of the insertion groove 12 and the locking groove 14. That is, the insertion groove 12 and the locking groove 14 may be formed only inside the tip rod 50. This prevents the inflow of soil and the like into the insertion groove 12 and the locking groove 14 in the process of inserting into the ground, and can also facilitate the separation of the bit 20.

A rubber, silicone or synthetic resin coating may be formed on one side of the surface where the tip rod 50 and the bit 20 are in contact, that is, the inner surface of the tip rod 50 and the outer surface of the bit 20. This coating can prevent the grout from leaking by sealing the bonding surface.

Screws may be formed inside the bit 20 and outside the front end of the nail 30 to be described later. The screw is a right screw, that is, a screw coupled to the bit 20 when rotating the nail 30 to the right. This allows the nail 30 to be firmly coupled to the bit 20 coupled to the tip rod 50, and then rotated to the left in the steps described below to separate the bit 20 from the tip rod 50. Have it.

The step of separating the bit 20 from the tip rod 50 inserts the nail 30 into the hollow of the perforated rod 10 and the tip rod 50, and rotates the nail 30 to the right to shear After the screw is screwed to the bit 20, the bit 20 is rotated slightly to the left again, and then pushed forward or by pulling the perforated rod 10 and the tip rod 50 rearward, thereby pulling the bit 20 into the tip rod 50. Can be separated from.

The direction of screwing the perforated rod 10 to the tip rod 50 is performed in the left direction, that is, counterclockwise. This is a direction to prevent the loosening of the tip rod 50 and the puncture rod 10 when the puncture rod 10 is rotated counterclockwise to insert it into the ground.

In this embodiment, the tip rod 50 and the perforated rod 10 are withdrawn and reused, and the nail 30 can reduce construction cost by using ordinary reinforcing bars or the like.

Anchor keys 40 may be installed on the nail 30 at regular intervals. The anchor key 40 is a cylindrical coupling portion 41 that is coupled to the nail 30, an extension portion 43 that extends in a trumpet shape toward the rear from the coupling portion 41, the extension portion ( It may include a wing portion 45 that is separated from 43) and spaced apart from each other at regular intervals. The inner side of the wing portion 45 is smaller than the inner diameter of the tip rod 50 and the perforated rod 10, and the outer side is preferably formed larger than the inner diameter of the tip rod 50 and the perforated rod 10. That is, when the anchor key 40 enters the inside of the tip rod 50 and the drill rod 10, the wing portion 45 is reduced to fit the inner diameter of the tip rod 50 and the drill rod 10 After the nail 30 is combined with the bit 20, the tip rod 50 and the perforated rod 10 are drawn out, and then the reduced wing portion 45 is expanded, so that the nail 30 is placed on the ground. It can be settled more firmly. The coupling part 41 may be coupled to the nail 30 by welding or the like. The coupling portion 41 and the expansion portion 43 may have a shape in which one side is cut.

In the step of additionally injecting the grout into the ground, the tip rod 50 and the perforated rod 10 separated from the bit 20 are pulled out of the ground while the tip rod 50 and the perforated rod 10 are pulled out. It is a step of additionally injecting grout into the space of the leading rod 50 and the perforated rod 10 and the surrounding ground drawn out by using the hollow. Since the surrounding ground is tightly filled with the grout injected in the above-described step (first step), the grout that is additionally injected can be injected deep into the ground without leaking to the outside. Therefore, the surrounding ground can achieve a more enhanced effect than the original ground.

In this embodiment, the tip rod 50 can be manufactured and utilized in various ways. For example, the diameter of the tip rod 50 may be gradually increased as it goes rearward, or may be increased stepwise. In addition, the perforated rod 10 may be connected to the inner side of the tip rod 50 or the perforated rod 10 may be connected to the outer side of the tip rod 50. This is provided with various shapes of the tip rod 50 to be connected to the perforated rod 10 of various standards, thereby increasing the usability of the equipment and saving cost. That is, by combining various bits 20 with one device, it is possible to increase economic efficiency and usability of the device.

In the above-described embodiments, the extension rod 70 may be additionally connected to the rear end of the perforated rod 10 using a connector 60. The connector 60 has an inner ring 62 having the same diameter and thickness as the perforated rod 10 and the extended rod 70, and an outer ring that is integrally formed on the outside of the inner ring and further extends in length at both ends of the inner ring. It may include a ring (64). In addition, a screw is formed on the inner surface of the portion where the length of the outer ring 64 is further extended to be coupled to a screw formed on the outer surfaces of the perforated rod 10 and the extended rod 70.

The connector 60 does not interfere with the insertion of the nail 30 by preventing the inner diameter from shrinking at the connection portion between the perforated rod 10 and the extended rod 70.

In the above, even if all the components constituting the embodiments of the present invention are described as being combined or operated as one, the present invention is not necessarily limited to these embodiments. That is, within the scope of the present invention, all the components may be configured or operated by selectively combining one or more components. In addition, the terms "include", "consist" or "have" as described above mean that the corresponding component can be intrinsic, unless specifically stated to the contrary, excluding other components. It should be construed that it may contain other components. All terms, including technical or scientific terms, have the same meaning as generally understood by a person skilled in the art to which the present invention pertains, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted as being consistent with the contextual meaning of the related art, and are not to be interpreted as ideal or excessively formal meanings unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and variations without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the claims below, and all technical spirits within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

10: perforated rod
12: Insertion groove
14: Hanging groove
20: Bit
22: Injector
24: Jam key
30: nail
40: anchor key
41: coupling part
43: Extension
45: wing
50: leading rod
52: Insertion groove
54: Hanging groove
56: elastic piece
60: connector
62: inner ring
64: outer ring
70: extension rod

Claims (10)

The perforation while rotating and inserting an excavation device including a hole having a hollow perforated rod and a bit having an injection hole for injecting a grout connected to the hollow of the perforated rod after being inserted into the front of the perforated rod and rotating into the ground Pressure-injecting grout into the ground through the hollow of the rod and the injection hole of the bit;
Inserting a nail into the hollow of the perforated rod, screwing the front end of the nail to the bit, and separating the bit from the perforated rod; And
Including the step of additionally injecting the grout into the space of the perforated rod and the surrounding ground drawn out by using the hollow of the perforated rod while withdrawing the perforated rod;
The perforated rod includes an insertion groove cut in the rearward direction at the front and an engaging groove having a width extended inside the insertion groove, and the bit is inserted into the insertion groove of the perforated rod on the outside and then caught in the engaging groove. Includes a jam key,
An elastic piece is provided in the insertion groove of the perforated rod or the locking key,
The elastic piece prevents the bit from deviating from the perforated rod by causing the locking key to move toward the locking groove,
A cover is formed on the outer surfaces of the insertion groove and the locking groove,
SD nailing method in which a rubber, silicone or synthetic resin coating is formed on one side of the inner surface of the perforated rod and the outer surface of the bit.
delete delete The method according to claim 1,
The locking groove gradually increases in width toward the front toward the side, and the locking key is formed to correspond to the shape of the locking groove, so that the SD is prevented from falling out after the locking key is inserted into the locking groove Nailing method.
A hollow-shaped perforated rod, a hollow-shaped tip rod screwed to the front of the perforated rod, and inserted into the front of the tip-rod to be rotated to be coupled and connected to the hollow of the tip-rod to inject a grout Pressure-injecting grout into the ground through the hollow of the perforated rod and the tip rod and the injection hole of the bit while rotating and inserting an excavation device including the formed bit into the ground;
Inserting a nail into the hollow of the perforated rod and the tip rod, screwing the front end of the nail to the bit and separating the bit from the tip rod; And
Including the step of additionally injecting the grout into the space of the perforated rod and the tip rod and the surrounding ground of the perforated rod and the tip rod that are drawn out by using the hollow of the perforated rod and the tip rod while withdrawing the perforated rod and the tip rod;
The tip rod includes an insertion groove cut in the rearward direction at the front and a locking groove having an expanded width inside the insertion groove, and the bit is inserted into the insertion groove of the tip rod at the outside and then caught in the locking groove. Includes a jam key,
An elastic piece is provided in the insertion groove of the tip rod or the locking key,
The elastic piece prevents the bit from deviating from the tip rod by causing the locking key to move toward the locking groove,
A cover is formed on the outer surfaces of the insertion groove and the locking groove,
An SD nailing method in which a rubber, silicone or synthetic resin coating is formed on one side of the inner surface of the tip rod and the outer surface of the bit.
delete delete The method according to claim 5,
The locking groove gradually increases in width toward the front toward the side, and the locking key is formed to correspond to the shape of the locking groove, so that the SD is prevented from falling out after the locking key is inserted into the locking groove Nailing method.
The method according to claim 1 or 5,
The extension rod is further connected to the rear end of the perforated rod using a connector,
The connector includes an inner ring having the same diameter and thickness as the perforated rod and the extension rod, and an outer ring integrally formed on the outside of the inner ring and extending in length at both ends of the inner ring, the length of the outer ring A screw nail is formed on the inner surface of the extended portion is coupled to the screw formed on the outer surface of the perforated rod and the extended rod SD nailing method.
The method according to claim 1 or 5,
The nail further includes an anchor key installed at regular intervals,
The anchor key includes a coupling portion coupled to the nail, an extension portion extending width in a trumpet shape from the coupling portion to the rear, and a wing portion separated from the extension portion and spaced apart from each other at regular intervals,
The wing portion inner side is smaller than the inner diameter of the perforated rod, the outer side of the SD nailing method, characterized in that formed larger than the inner diameter of the perforated rod.

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