KR20190108780A - Sd nailing method - Google Patents

Abstract

The present invention relates to an SD nailing method including the following steps of: rotating and inserting an excavator, which includes a hollow boring rod and a bit rotated to be combined after being inserted into the front side of the boring rod and including an injection hole connected to a hollow hole of the boring rod to inject grout, into the ground, while injecting the grout into the ground with pressure through the injection hole of the bit and the hollow hole of the boring rod; screwing the front end of a nail with the bit by inserting the nail into the hollow hole of the boring rod, and then, separating the bit from the boring rod; and injecting additional grout into a space of the withdrawn boring rod and its neighboring ground by using the hollow hole of the boring rod while withdrawing the boring rod. Therefore, since the bit is inserted into the ground at the same time when the grout is injected, the subsidence and displacement of the ground can be minimized.

Description

SD nailing method {SD NAILING METHOD}

The present invention relates to a SD nailing method, in particular, to increase the structural stability of the ground by inserting the nail and grouting the ground at the same time, by improving the ground anchoring ability of the nail by combining the nail and the bit firmly It is about public law.

When constructing roads or apartment complexes, steep slopes are frequently generated. As a method of stabilizing the steep slopes, the small nail method is widely used.

In general, the small nail method is to protect the excavation surface by placing shotcrete on the excavation surface, and then drills the drill holes at the appropriate depth and interval. Then a hose for injecting the nail and grout into each of the drill holes is inserted together so that the rear end of the nail protrudes from the surface of the excavation surface. After the grout is injected into the hole through the hose, the pressure plate to fix the wire mesh and nail on the shotcrete surface is installed and fixed. Such a process increases the shear strength of the ground by nails and grout to suppress the displacement of the ground expected after the completion of construction. The ground stabilization method using such a nail allows the ground of the area reinforced by the small nail to act as an integral retaining wall and maintains the stability of the sloped ground.

However, in the small nail method, the ground around the hole is settled or displaced in the process of drilling the hole, thereby greatly reducing the structural stability of the ground. In addition, it is difficult to secure the design depth of the nail because the collapsed ground soil flows to the front end of the perforation hole, and when the soil is removed to secure the insertion depth of the nail, the work must be redone and the ground sinks at the same time. Construction is delayed. In addition, the grout is filled into the collapsed ground, thereby increasing the amount of grout used, which is uneconomical.

Methods for solving the above problems are disclosed. For example, Korean Laid-Open Patent Publication No. 10-2004-98837 discloses a method for constructing a multipurpose improved nail nail anchor (see FIGS. 1A to 1B). This conventional technology shortens and improves the construction stage, and replaces the drilled drilling mains with a soil nail anchor for the rebar anchor installation, and immediately completes the high-strength cement milk injection. As a high rigidity material, it is sufficiently supported by rock foundation or earth pressure.

However, the prior art has a problem that the construction cost increases because the expensive high-strength drilling tube (4) to remain in the drilling hole, and the cement milk grouting operation is performed only once in the injection of the main tube, there is insufficient grouting.

In another prior art, Korean Patent Publication No. 10-573914, filed by the inventor of the present application, has been disclosed 'nailing method using a nail for reinforcing ground' (see Figs. 2a to 2c). This prior art is' in the nailing method using a nail coated with a protective material for protecting damage from glass fiber, the glass fiber is impregnated with a glass fiber is formed in a hollow shape, the spiral projection is formed on the outer peripheral surface , Digging the ground 100 to a stable height where the excavation surface can stand; Drilling a insertion hole (110) to the excavation surface by using a hollow auger having a bit (30) detachably coupled to the tip portion and a spiral braid (11) formed on an outer circumferential surface thereof; Entering the nail (40) through the hollow of the auger and separating the bit (30) from the auger while engaging the tip of the nail (40) to the bit (30); And filling the filler 60 in the outer circumferential surface of the insertion hole 110 and the nail 40 through which the auger is removed through the auger while removing the auger by rotating the auger backward. Nailing method using a ground reinforcing nail (refer to claim 2), characterized by light weight, easy to carry and handle, improve workability, reduce the wear of the braid during drilling, nail in the center of the insertion hole It is intended to be placed and to employ environmentally friendly fillers.

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

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

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

In addition, there is no waste grout by not digging the nail ball to provide an economical SD nailing method.

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

In addition, by additionally injecting grout while drawing the punching rod, it is intended to provide an SD nailing method with excellent ground reinforcing effect.

In addition, the grout injection hose is not provided separately, it is intended to provide an SD nailing method that the nail structure is simple to increase the productivity.

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

In addition, the front end portion of the nail is screw coupled with the bit to provide an SD nailing method excellent in the ground fixing 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 a conventional rod at a low cost to provide an economical SD nailing method.

The SD nailing method according to an embodiment of the present invention includes a hollow-shaped punching rod, and a bit formed by inserting in front of the punching rod, rotating and coupled thereto, and having an injection hole connected to the hollow of the punching rod and injecting grout. Pressure-injecting grout into the ground through the hollow of the drilling rod and the injection hole of the bit while rotating inserting the drilling device into the ground; Inserting a nail into the hollow of the perforated rod to screw the shear portion of the nail to the bit and then separating the bit from the perforated rod; And additionally injecting grout into the space of the perforated rod and the ground around which the perforated rod is drawn out using the hollow of the perforated rod while drawing out the perforated rod.

In addition, the drilling rod includes an insertion groove cut in the rear in the front and a locking groove extended in the inner side of the insertion groove, the bit is inserted into the insertion groove of the drilling rod on the outside of the locking groove It may be characterized in that it comprises a locking key.

In addition, an elastic piece is provided in the insertion groove or the locking key of the punching rod, and the elastic piece may be characterized in that the bit prevents the bit from the punching rod by moving the locking key toward the locking groove. .

In addition, the locking groove is gradually wider toward the front toward the side toward the side, the locking key is formed to correspond to the shape of the locking groove, characterized in that the locking key is inserted into the locking groove is prevented from falling out. Can be.

In addition, a rubber, silicone or synthetic resin coating is formed on one side of the contact coupling surface of the perforated rod and the bit to prevent the grout from leaking.

In addition, another embodiment of the SD nailing method according to an embodiment of the present invention is a hollow punched rod, a hollow tip rod screwed to the front of the punched rod, and inserted into the front of the tip rod and then rotated Coupled to the hollow of the tip rod is inserted into the ground through the drilling hole including the hole and the injection hole of the drill rod and the tip rod into the ground while inserting the drilling device including a bit formed with an injection hole for injecting grout into the ground Pressurizing the 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 injecting grout into the space between the perforated rod and the tip rod and the ground around the perforated rod and the tip rod while drawing the perforated rod and the tip rod. can do.

In addition, the front end rod includes an insertion groove cut in the rear in the front and the engaging groove extended in the width of the inside of the insertion groove, the bit is inserted into the insertion groove of the front end rod on the outside of the engaging groove It may be characterized in that it comprises a locking key.

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

The elastic piece may be characterized in that the bit is prevented from being separated from the tip rod by causing the locking key to move toward the locking groove.

In addition, the locking groove is gradually wider toward the front toward the side toward the side, the locking key is formed to correspond to the shape of the locking groove, characterized in that the locking key is inserted into the locking groove is prevented from falling out. Can be.

In addition, a rubber, silicone or synthetic resin coating is formed on one side of the contact coupling surface of the tip rod and the bit to prevent the grout from leaking.

In addition, an extension rod is further connected to the rear end of the perforated rod by using a connector, and the connector is formed with an inner ring having the same diameter and thickness as the perforated rod and the extension rod, and integrally formed on the outside of the inner ring. And an outer ring having a longer length at both ends of the ring, wherein a screw is formed on an inner surface of the portion of which the outer ring extends further and coupled to a screw formed on the outer surface of the perforated rod and the extension rod. Can be.

In addition, the nail further comprises an anchor key is installed at a predetermined interval, the anchor key is coupled to the coupling portion, the extension portion is extended in the width of the trumpet shape to the back from the coupling portion, the extension portion, It may be separated to include a wing extending to be spaced apart from each other, the wing portion may be characterized in that the inner side is smaller than the inner diameter of the perforated rod, the outer side is formed larger than the inner diameter of the perforated rod.

The present invention can completely prevent settlement and displacement of the ground by inserting the grout while inserting the bit into the ground.

In addition, by not digging the nail ball, there is no waste of grout and economical.

In addition, the nail hole is not excavated and grout is injected to ensure the same quality regardless of the worker's ability.

In addition, by additionally injecting grout while drawing the punching rod, the ground reinforcing effect is excellent.

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

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

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

In addition, by providing a perforated rod and a bit sized tip rod, it is possible to use an ordinary rod having a low cost.

1 and 2 are diagrams of the prior art.
3A is a view illustrating a state in which grout is pressurized into the ground at the same time as the insertion in the SD nailing method according to an example of the present invention.
Figure 3b is a view showing a process proceeding to the planned depth of the injection of the grout at the same time as the insertion.
Figure 3c is a view showing how to insert the nail into the hollow of the perforated rod.
3d is a view showing the nail screwed to the bit.
Figure 3e is a view showing a state in which the additional injection of the grout into the ground by using the hollow of the drilling rod while drawing out the drilling rod.
3f is a view showing a state in which the grout is further injected into the space and the surrounding ground from which the punch rod is drawn out, while the drill rod is completely drawn out of the ground.
Figure 4a is an exploded perspective view of the bit, punched rod, nail in accordance with an example of the present invention.
Figure 4b is a cross-sectional view of the bit and the perforated rod, the connection of the perforated rod and the extension rod in accordance with an example of the present invention.
Figure 4c is a view showing a combination of bits and punched rod according to an example of the present invention.
5A is an exploded perspective view of a bit, tip rod, perforated rod, and nail in accordance with an example of the present invention.
5B is a cross-sectional view of the bit, tip rod, and perforated rod, and the connection of the perforated rod and the extension rod in accordance with an example of the present invention.
Figure 5c is a view showing a combination of the bit, the tip rod and the perforated rod in accordance with an example of the present invention.
6A is a perspective view illustrating a state in which an elastic piece is provided on a tip rod according to an example of the present invention.
Figure 6b is a perspective view showing the locking groove and the insertion key formed in a trapezoidal shape according to an example of the present invention.
Figure 6c is a perspective view showing a state that the anchor key is installed on the nail in accordance with an example of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the reference numerals to the components of the drawings, the same components are to have the same reference numerals as much as possible even if displayed on different drawings. In addition, in describing the embodiments of the present invention, when it is determined that a detailed description of a related well-known configuration or function interferes with the understanding of the embodiments of the present invention, the detailed description thereof will be omitted.

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

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

SD nailing method according to an embodiment of the present invention, the hollow hole punching rod 10, and inserted into the front of the punching rod 10 is rotated and coupled and connected to the hollow of the punching rod (10) grout While inserting an excavation device including a bit 20 formed with an injection hole 22 to inject into the ground through the hollow of the drilling rod 10 and the injection hole 22 of the bit 20 into the ground Pressurizing the grout with; Inserting the nail 30 into the hollow of the punching rod 10 to screw the front end of the nail 30 to the bit 20 and then separating the bit 20 from the punching rod 10. ; And additionally injecting grout into the space of the perforated rod 10 and the ground around the perforated rod 10 while using the hollow of the perforated rod 10 while drawing out the perforated rod 10.

Injecting the grout by pressure, combines the bit 20 is formed in the injection hole 22 in front of the hollow hole 10. Then, using a separate device to insert into the ground at the same time by inserting the grout by pressing the grout. In this step, by inserting the boring rod 10 combined with the bit 20 into the ground and simultaneously grout pressure injection, the settlement and displacement of the surrounding ground is completely prevented, and at the same time the waste of grout is prevented, It can be constructed with the same quality regardless of ability.

Rotation at the time of insertion of the punching rod 10 and the bit 20 may be performed in any direction, but the following description will be given by rotating to the left, that is, counterclockwise.

The perforated rod 10 is a hollow circular tube so that the grout is injected through the hollow, and transmits the rotational force and the pressure input to the bit 20 coupled to the front end to be inserted forward. In addition, the hollow of the drilling rod 10 is used as a space for inserting the nail 30 after the bit 20 is completely inserted. Perforated rod 10 may be connected to each other with a plurality of screws. That is, it is provided with a perforated rod 10 of the appropriate length, can be used to connect to each other to fit the insertion depth of the nail (30).

The front of the punching rod 10 is a portion where the bit 20 is coupled, the insertion groove 12 is formed to be cut in the rear side, the width of the insertion groove 12 in the insertion groove 12, that is, the rear side The extended locking groove 14, that is, the locking groove 14 may be formed in the right direction of the insertion groove 12.

The insertion groove 12 is a passage into which the locking key 24 formed in the bit 20 to be described later is inserted, and the locking groove 14 is rotatably seated by 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 so as to be located in the locking groove 14 to prevent it from falling out of the punching rod 10. According to the drawing, the locking groove 14 is formed on the right side of the insertion groove 12. That is, the punched rod 10 to which the bit 20 is coupled is rotated to the left, that is, counterclockwise. In this case, the locking key 24 is rotated in the state of being inserted into the locking groove 14 formed on the right. 20 is prevented from falling out of the perforated rod 10 and the insertion proceeds to the ground. Insertion groove 12 is formed in a width that can be inserted into the insertion key, the locking groove 14 is the size that can be inserted while the insertion key is rotated.

As described above, the locking key 24 may protrude from the outside of the bit 20. That is, an insertion groove 12 and a locking groove 14 are formed in front of the drilling rod 10 to couple the drilling rod 10 and the bit 20, and the locking key 24 is located outside the bit 20. ) May be formed. Therefore, the bit 20 is inserted into the front of the punching rod 10 and then rotated to be quickly coupled to the punching rod 10, and the deviation from the punching rod 10 during rotation insertion in the ground is prevented. It can be easily separated from the perforated rod 10 in the step. 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 portion at the rear end of the bit 20, that is, the inner surface of the punching rod 10 and the outer surface of the bit 20 may be in close contact with each other so that the punching rod ( 10) and the grout injected through the bit 20 can be prevented. The locking groove 14 may gradually increase in width toward the right, that is, toward the clockwise direction, and the locking key 24 may be formed to correspond to the shape of the locking groove 14. That is, the locking groove 14 is formed in a trapezoidal shape in which the width gradually increases toward the right toward the right side, 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-back direction of the locking key 24 should be slightly smaller than the minimum width in the front-back direction of the locking groove 14. The shape of the locking groove 14 and the locking key 24 prevents the locking key 24 from being pulled out after being inserted into the locking groove 14. A small amount is enough to increase the width of the locking groove 14 and the locking key 24 toward the right direction. 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 may be prevented. That is, since the bit 20 is inserted into the punching rod 10, the punching rod 10 rotates counterclockwise, that is, to the left, so that the bit 20 is prevented from being separated. Even when the bit 20 is to be moved forward, the locking key 24 is moved to the right direction of the locking groove 14 due to the inclination of the front portion of the locking groove 14, thereby preventing it from being pulled out.

An elastic piece 56 may be provided in the insertion groove 12 of the punching rod 10. The elastic piece 56 may be provided on the inner side, that is, the rear side of the insertion groove 12. The elastic piece 56 moves the locking key 24 inserted into the insertion groove 12 slightly toward the locking groove 14, and since the insertion key is prevented from being pulled out, in particular, the front inclination of the locking groove 14 is prevented. Can completely prevent the removal of the locking key (24). The small amount of elastic force of the elastic piece 56 is sufficient. That is, the locking key 24 can be prevented from being pulled out simply by being located at the locking groove 14 side slightly. The elastic piece 56 may be provided on the locking key 24 of the bit 20 (not shown). Therefore, unless the worker applies artificial force, the locking key 24 is difficult to detach from the locking groove 14 by itself.

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 on the inner side of the drilling rod 10. This can prevent 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, it can also facilitate the separation of the bit (20).

Rubber, silicone or synthetic resin coating may be formed on one side of the inner surface of the main roadway 10 and the outer surface of the bit 20, that is, the surface of the perforated rod 10 and the bit 20. This coating can prevent the grout from leaking by sealing the mating surfaces.

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

Separating the bit 20 from the punching rod 10 inserts the nail 30 into the hollow of the punching rod 10, rotates the nail 30 to the right, and shears the front end of the bit 20. After screwing together, the bit 20 can be rotated back slightly to the left and then pushed forward or pulled the punched rod 10 backward to separate the bit 20 from the punched rod 10.

The nail 30 may be used a conventional circular reinforcement, deformed rebar, steel bar and the like. That is, the nail 30 can be used by forming a screw in the front of the ordinary rebar and the like.

In this embodiment, the perforated rod 10 is drawn out and reused, and the nail 30 may reduce construction costs by using a common rebar.

An anchor key 40 may be installed on the nail 30 at regular intervals. The anchor key 40 is a cylindrical coupling portion 41 is coupled to the nail 30, the expansion portion 43 is expanded in the width of the trumpet shape toward the rear from the coupling portion 41, the expansion portion ( 43 may be separated from each other and may include wings 45 extending to be spaced apart from each other at regular intervals. The wing portion 45 is preferably formed in the inner side is smaller than the inner diameter of the drilling rod 10, the outer side is larger than the inner diameter of the drilling rod 10. That is, when the anchor key 40 enters the inner side of the punching rod 10, the wing 45 may be reduced to fit the inner diameter of the punching rod 10, and the nail 30 may enter the bit ( The nail 30 may be more firmly fixed to the ground by being coupled to the 20 and the expanded wing portion 45 is extended after the drill rod 10 is drawn out. The coupling part 41 may be coupled to the nail 30 by welding or the like. The coupling part 41 and the expansion part 43 may have a shape in which one side is cut.

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

Another embodiment of the SD nailing method according to an embodiment of the present invention is a hollow punch rod 10, a hollow tip rod 50 screwed to the front of the punch rod 10, and the tip The excavation device including a bit 20 is inserted into the front of the rod 50, rotated and coupled and connected to the hollow of the tip rod 50 to form an injection hole 22 for injecting grout into the ground. Pressurizing the grout into the ground through the hollow of the drilling rod 10 and the tip rod 50 and the injection hole 22 of the bit 20 while being inserted; The nail 30 is inserted into the hollow of the punching rod 10 and the tip rod 50 to screw the front end of the nail 30 to the bit 20, and then the bit 20 is the tip rod ( 50); And the space of the perforated rod 10 and the tip rod 50 drawn out by using the hollows of the perforated rod 10 and the tip rod 50 while drawing out the perforated rod 10 and the tip rod 50. And pressing the grout further into the ground.

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

The same parts of the present embodiment and the above-described embodiment can be omitted. Omitted parts may be applied by inferring the description of the above-described embodiment.

In the step of pressurizing the grout of the present embodiment, the hollow front end rod 50 is screwed to the front of the hollow perforated rod 10, and the injection hole 22 is formed in front of the front end rod 50. Insert the bit 20 and rotate to combine. Thereafter, the bit 20, the tip rod 50, and the perforated rod 10 are rotated and inserted into the ground, and the grout is pressurized and injected.

The front end of the rod 50 is a portion in which the bit 20 is coupled, the insertion groove 52 cut in the rear is formed, 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 may be formed in the right direction of the insertion groove 52.

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 in which the locking key 24 inserted into the insertion groove 52 is rotated and seated. . That is, the locking key 24 is inserted into the insertion groove 52 and then rotated to position the locking groove 54 so that the locking key 24 is prevented 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 tip rod 50 to which the bit 20 is coupled is rotated to the left, that is, counterclockwise. In this case, the locking key 24 is rotated in the state of being inserted into the locking groove 54 formed on the right side. 20) is prevented from being removed from the tip rod 50 and the insertion proceeds to the ground. Insertion groove 52 is formed in a width that can be inserted into the insertion key, the locking groove 54 is the size that can be inserted while the insertion key is rotated.

The locking key 24 may protrude from the outside of the bit 20. That is, an insertion groove 52 and a locking groove 54 are formed in front of the tip rod 50 to couple the tip rod 50 and the bit 20, and the locking key 24 is located outside the bit 20. ) May be formed. Therefore, the bit 20 is inserted into the front of the tip rod 50 and then rotates to be quickly coupled to the tip rod 50, and the deviation from the tip rod 50 is prevented during rotation insertion in the ground, the tip It can be easily separated 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 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 may be in close 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 locking groove 54 may gradually increase in width toward the right side, that is, clockwise, and the locking key 24 may be formed to correspond to the shape of the locking groove 54. That is, the locking groove 54 is formed in a trapezoidal shape in which the width gradually increases toward the right 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-back direction of the locking key 24 should be slightly smaller than the minimum width in the front-back direction of the locking groove 54. The shape of the locking groove 54 and the locking key 24 prevents the locking key 24 from being pulled out after being inserted into the locking groove 54. The width of the locking groove 54 and the locking key 24 that increases toward the right direction is sufficient even with a small amount. That is, when the locking key 24 is inserted into the insertion groove 52 and rotates slightly toward the locking groove 54, the locking key 24 may be prevented from being separated. That is, since the tip rod 50 is inserted into the tip rod 50 and the tip rod 50 rotates counterclockwise, that is, to the left, the departure of the bit 20 is prevented. Even when the bit 20 is to be moved forward, the locking key 24 is moved to the right direction of the locking groove 54 due to the inclination of the front portion of the locking groove 54, thereby preventing it from being pulled 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 on the inner side, that is, the rear side of the insertion groove (52). The elastic piece 56 moves the locking key 24 inserted into the insertion groove 52 slightly toward the locking groove 54, and since the insertion key is prevented from being pulled out, in particular, the front inclination of the locking groove 54 is prevented. Can completely prevent the removal of the locking key (24). The small amount of elastic force of the elastic piece 56 is sufficient. That is, the locking key 24 can be prevented from being pulled out only by being minutely positioned at the locking groove 54. The elastic piece 56 may be provided on the locking key 24 of the bit 20 (not shown). Therefore, unless the worker applies an artificial force, the locking key 24 is difficult to detach from the locking groove 54 by itself.

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 can prevent 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, it can also facilitate the separation of the bit (20).

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

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

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 screwing the part with the bit 20, the bit 20 is rotated slightly to the left side and then pushed forward or by pulling the perforated rod 10 and the end rod 50 to the rear to push the bit 20 to the tip rod 50. Can be separated.

The screwing direction of 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 punching rod 10 when the punching rod 10 is rotated counterclockwise to insert into the ground.

In this embodiment, the tip rod 50 and the perforated rod 10 are drawn out and reused, and the nail 30 can reduce the construction cost by using ordinary rebar.

An anchor key 40 may be installed on the nail 30 at regular intervals. The anchor key 40 is a cylindrical coupling portion 41 is coupled to the nail 30, the expansion portion 43 is expanded in the width of the trumpet shape toward the rear from the coupling portion 41, the expansion portion ( 43 may be separated from each other and may include wings 45 extending to be spaced apart from each other at regular intervals. The wing 45 has an inner side smaller than the inner diameter of the tip rod 50 and the perforated rod 10, 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 perforated rod 10, the wing 45 is reduced to suit the inner diameters of the tip rod 50 and the perforated rod 10. After the nail 30 is coupled with the bit 20 and the tip rod 50 and the perforated rod 10 are drawn out, the reduced wings 45 are expanded, so that the nail 30 is extended to 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 part 41 and the expansion part 43 may have a shape in which one side is cut.

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

In this embodiment, the tip rod 50 may be manufactured and utilized in various ways. For example, the diameter of the tip rod 50 may be gradually increased or gradually increased in the rearward direction. In addition, the perforated rod 10 may be connected to the inside of the tip rod 50, or the perforated rod 10 may be connected to the outside of the tip rod 50. It is provided with a variety of shapes of the front end rod 50 to be connected to the perforated rod 10 of various specifications, thereby increasing the usability of the equipment can save the cost. That is, by being able to combine the various bits 20 in one device, it is possible to increase the economics and the usability of the equipment.

In the above-described embodiments, the extension rod 70 may be further connected to the rear end of the punching rod 10 by using the connector 60. The connector 60 has an inner ring 62 having the same diameter and thickness as the punching rod 10 and the extension rod 70, and an outer ring which is integrally formed at the outer side of the inner ring and further extends at both ends of the inner ring. Ring 64. In addition, a screw is formed on the inner surface of the portion in which the length of the outer ring 64 is further extended, and may be coupled to a screw formed on the outer surface of the drilling rod 10 and the extension rod 70.

The connector 60 does not interfere with the insertion of the nail 30 by preventing the inner diameter from being reduced in the connecting portion of the punching rod 10 and the extension rod 70.

In the above description, all elements constituting the embodiments of the present invention are described as being combined or operating in combination, but the present invention is not necessarily limited to the embodiments. That is, within the scope of the present invention, all of the components may be configured or operated by selectively combining one or more of them. In addition, the terms "comprise", "comprise" or "having" described above mean that the corresponding component may be inherent unless specifically stated otherwise, and thus excludes other components. It should be construed that it may further include other components instead. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. Terms used generally, such as terms defined in a dictionary, should be interpreted to coincide with the contextual meaning of the related art, and shall not be interpreted in an ideal or excessively formal sense 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 changes 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 idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

10: perforated rod
12: Insertion groove
14: Hanging groove
20 bits
22: injection hole
24: Jam Key
30: nail
40: Anchor Key
41: coupling part
43: extension
45: wing
50: tip rod
52: insertion groove
54: locking groove
56: elastic piece
60: connector
62: inner ring
64: outer ring
70: extension rod

Claims (10)

The drilling by rotating the drilling device into the ground, including a drilling rod having a hollow shape, the bit is inserted into the front of the drilling rod and then rotated and coupled and connected to the hollow of the drilling rod to form an injection hole for injecting grout. Pressurizing 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 to screw the shear portion of the nail to the bit and then separating the bit from the perforated rod; And
And additionally injecting grout into the space of the perforated rod and the ground around which the perforated rod is drawn out using the hollow of the perforated rod while drawing out the perforated rod.
The method according to claim 1,
The drilling rod includes an insertion groove cut in the rear in the front and a locking groove extended in the inner side of the insertion groove, the bit is inserted into the insertion groove of the drilling rod on the outside to be caught by the locking groove SD nailing method comprising a locking key.
The method according to claim 2,
An elastic piece is provided in the insertion groove or the locking key of the drilling rod,
The elastic nailing method of the SD nailing method, characterized in that the locking key is moved toward the locking groove to prevent the bit from being separated from the punching rod.
The method according to claim 2,
The locking groove is gradually wider toward the front toward the side toward the side, and the locking key is formed to correspond to the shape of the locking groove, SD is characterized in that the locking key is prevented from being inserted after being inserted into the locking groove Nailing method.
Hollow-shaped perforated rod, a hollow end rod screwed to the front of the perforated rod, and inserted into the front of the front end rod is rotated and coupled to the injection hole connected to the hollow of the front end rod to inject grout Pressing the grout into the ground through the hollow of the drilling rod and the tip rod and the injection hole of the bit while rotating inserting the drilling apparatus 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
Pressing the grout into the space of the perforated rod and the tip rod and the ground surrounding the perforated rod and the tip rod while drawing out the perforated rod and the tip rod, the nailing method comprising; .
The method according to claim 5,
The front end rod includes an insertion groove cut in the rear in the front and a locking groove extended in the inner side of the insertion groove, the bit is inserted into the insertion groove of the front end rod on the outside and caught by the locking groove SD nailing method comprising a locking key.
The method according to claim 6,
An elastic piece is provided in the insertion groove or the locking key of the tip rod,
And the elastic piece prevents the bit from being detached from the tip rod by causing the locking key to move toward the locking groove.
The method according to claim 6,
The locking groove is gradually wider toward the front toward the side toward the side, and the locking key is formed to correspond to the shape of the locking groove, SD is characterized in that the locking key is prevented from being inserted after being inserted into the locking groove Nailing method.
The method according to claim 1 or 5,
An extension rod is further connected to the rear end of the punching rod by 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 which is integrally formed at the outside of the inner ring and further extends at both ends of the inner ring, and the length of the outer ring. The nailing method of claim 2, wherein a screw is formed on the inner surface of the extended portion and coupled to the screw formed on the outer surface of the perforated rod and the extended rod.
The method according to claim 1 or 5,
The nail further includes an anchor key is installed at a predetermined interval,
The anchor key includes a coupling portion coupled to the nail, an extension portion extending in width from the coupling portion to a back trumpet shape, a wing portion separated from the extension portion and spaced apart from each other by a predetermined interval,
The blade portion of the inside of the blade is smaller than the inner diameter of the punching rod, the outside of the nailing method, characterized in that formed larger than the inner diameter of the punching rod.

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