KR100929203B1 - Ground reinforcement device with protrusion members for injecting grout - Google Patents

Abstract

PURPOSE: A ground reinforcement apparatus with a protruded member for a protruded member for spraying grout is provided to maximize ground reinforcement effect by spraying grout on the punched inner side wall of a reinforcement hole. CONSTITUTION: A ground reinforcement apparatus with a protruded member for a protruded member for spraying grout comprises a reinforcement body, a protruded member(40), a guide member(50) and a pressing member(60). A grout injection hole(12) is formed on the upper part of the reinforcement body. The protruded member is inserted into an advancing hole(21) formed on the outer circumference of the reinforcement body. An injection nozzle(44) is formed on the protruded member to spray the grout on the inner wall of the reinforcement hole. The guide member moves in the longitudinal direction inside the reinforcement body. The guide member protrudes the protruded member from the reinforcement body. The pressing member is connected to the guide member through the center hole(11) of the reinforcement body.

Description

Ground reinforcement device with protrusion members for injecting grout}

The present invention relates to a ground reinforcement device that is inserted into the reinforcing hole of the perforated ground to reinforce the ground, and more particularly, by using a protruding member projecting from the reinforcement embedded in the reinforcing hole to increase the expansion and adhesion of the ground The present invention relates to a ground reinforcement device having a protruding member for grout injection that can further enhance ground reinforcement by diffusing and spraying grout from a protruding member to an inner wall of a reinforcing hole.

As the industry develops, it is inevitable to construct a complex or to install a base road, and a slope reinforcement method is widely used to prevent the slope from collapsing or slipping. Such slope reinforcement method is classified into active force reduction method, resistance enhancement method and surface protection method, etc. Among these, there are rock bolt, anchor, soil nail, stepped retaining wall, and the like.

The anchor method is also widely used as a reinforcement for supporting structures such as reinforcement of ground and buildings and bridges.

In the construction of anchors, the ground is drilled to a predetermined depth and diameter, the anchor body is inserted, and the grout (grout, cement + water or cement + water + sand) is filled. In order to secure the ground anchoring force in the reinforcement of the slope using the anchor having such a configuration, a separate configuration for increasing the resistance between the anchor body and the ground is required.

A conventional anchor for increasing anchoring force between the anchor body and the ground is disclosed in Korea Patent Publication No. 2006-0122346. The anchor structure disclosed in the patent document is provided between the anchor cap and the anchor body is provided with an expansion anchor radially protruding by the elastic force of the spring to penetrate the perforated reinforcing hole and settle on the ground.

However, it is not only practically impossible to push the expansion anchor through the inner circumferential surface of the perforated reinforcing hole by the force of the spring in such an anchor structure, but also its operation structure is very complicated. In addition, the role of the expansion anchor is merely an auxiliary means for increasing the ground anchoring force by being pushed into the perforated reinforcing hole, and the expansion anchor reinforces the ground because it cannot spread and spray grout on the inner wall of the perforated reinforcing hole. There is a limit to this.

The problem to be solved by the present invention is to implement a protruding member protruding radially outward of the reinforcement with a simpler configuration, by using this protruding member to improve the fixing force with the ground of the reinforcement, at the same time reinforcing the grout perforated It is to provide a ground reinforcement device that maximizes the ground reinforcement effect by diffusion spraying on the inner wall of the hole.

The present invention to achieve the above object,

In the ground reinforcement device embedded in the reinforcement hole of the perforated ground to reinforce the ground,

A reinforcement having a grout injection hole formed therein for injection of grout thereon;

A protruding member inserted into an exit hole formed around the reinforcement and having an injection nozzle for injecting the grout into an inner wall of the reinforcing hole;

A conical guide member movable in the longitudinal direction of the reinforcement and protruding the protruding member from the reinforcement through interference with the protruding member; And

It includes a force member connected to the guide member through the center hole of the reinforcement,

The protruding member provides a ground reinforcement device having a protruding member for grout injection, which protrudes from the reinforcing body by moving the guide member through the force member.

Here, the guide member includes a hollow guide tube, a protrusion guide portion having a conical surface extending from one end of the guide tube, a disk portion connected to form a step in the outward direction from the protrusion guide portion, when the protrusion member protrudes The head of the protruding member may be seated on the step of the guide member.

In addition, the tension member is a tension member for applying a tensile force to the reinforcement, the guide member may be disposed so that the disk portion is located below the reinforcement.

In addition, the tension member is a compression material for adding a compressive force to the reinforcement, the guide member may be disposed so that the disk portion is located above the reinforcement.

In addition, a grout guide hole may be formed through the disk portion of the guide member.

In addition, the head portion of the protruding member is provided with a protruding engaging jaw in contact with the inner circumferential surface of the reinforcement, the protruding member may be prevented from rotating when protruding by the concave-convex coupling between the exit hole.

In addition, the reinforcing body is the upper reinforcing portion through which the grout injection hole and the center hole is formed, coupled to the lower end of the upper reinforcing portion, the hollow guide receiving portion for receiving the guide member, and the lower reinforcing sealing the lower end of the guide receiving portion It may include wealth.

In addition, the upper reinforcing portion includes a horizontal fixing hole formed in the horizontal direction in communication with the center hole, the horizontal fixing hole is provided with a clamping force pressed by the elastic member of the guide member through the coupling with the guide member The position can be maintained.

In addition, it is coupled to the upper end of the reinforcement, the grout injection hole of the reinforcement further comprises a repositionable member to be in communication with the central hole, the repositionable member is coupled to one or a plurality of auxiliary reinforcement member Joining holes can be formed.

In addition, the ground reinforcement device, it may be made by connecting a plurality of ground reinforcement devices in multiple stages through the connection hole formed in the guide member.

Using the ground reinforcement device according to the present invention, not only maximize the anchoring force with the ground in a simpler configuration, but also can be further improved by strengthening the ground reinforcement by spraying the grout to the inner wall of the perforated reinforcing holes. In addition, since the grout can be diffused and sprayed into the ground in a desired position according to the depth of the perforated ground, it is possible to further maximize the ground reinforcement efficiency.

Hereinafter, the present invention will be described in more detail with reference to preferred examples. However, these examples are intended to illustrate the present invention in more detail, it will be apparent to those skilled in the art that the scope of the present invention is not limited thereby.

1 is an exploded perspective view of the ground reinforcing device 100 according to the present invention, Figure 2 is a cross-sectional view when the ground reinforcing device 100 according to the present invention is embedded in the reinforcing hole (h) of the perforated ground.

The ground reinforcement device 100 according to the present invention is to reinforce the ground by being embedded in the reinforcing hole (h) of the perforated ground, the reinforcement body 1 through which the grout injection hole 12 for injection of the grout is formed therethrough. ; A protruding member 40 inserted into the exit hole 21 formed around the reinforcement 1 and having a spray nozzle 44 for injecting grout into the inner wall of the reinforcing hole; A conical guide member 50 which is movable in the longitudinal direction of the reinforcement in the reinforcement 1 and protrudes the protruding member from the reinforcement 1 through interference with the protruding member 40; And a force member 60 connected to the guide member 50 by penetrating the center hole 11 of the reinforcement 1, and the protruding member 40 opens the guide member 50 through the force member 60. It moves and protrudes from the reinforcement 1.

In the ground reinforcement device according to the present invention configured as described above, the tension member may be a tension member or a compression member depending on the direction in which the guide member 50 is disposed in the reinforcement 1. Here, the "force material" means a member that adds a force to the reinforcing body 1, and the force may be a tensile force or a compressive force. If the force member is a tension member, the protrusion member 40 protrudes from the reinforcement member 1 when the force member is pulled, and if the force member is a compression member, the protrusion member 40 is reinforcement member 1 when the force member is pressed. Conical guide member 50 may be disposed in a forward or reverse direction to protrude from.

1, 2 and 4 to 6 shows the case in which the force member 60 is a tension member, and in FIG. 3 the force member 60 'is a compression member that adds a compressive force to the reinforcement 1 Is shown.

Hereinafter, a ground reinforcement device including a force member acting as a tension member will be described.

Ground reinforcement device according to the present invention, to reinforce the ground fastening the force member 60 to the reinforcement (1) embedded in the reinforcing hole (h) perforated in the ground, the force member connected to the guide member 50 The conical surface 54 of the guide member 60 pushes or pulls the head 60 of the protruding member 40 so as to radially protrude the protruding member 40 so as to reinforce the reinforcement 1. (h) It is firmly fixed to the inner wall and at the same time, the grout hose (p) is connected to the grout injection hole (12) formed in the upper part of the reinforcement (1) to project the grout injected into the reinforcement (1) projecting member ( By spreading and spraying the inner wall of the reinforcing hole through the spray nozzle 44 formed at 40, it is possible to simultaneously improve the fixation force of the ground and the reinforcement of the ground.

The grout injection hole 12 is formed in the reinforcement 1 of the present invention, and the grout injected therein is introduced into the reinforcement 1.

The reinforcement 1 is coupled to the lower end of the upper reinforcement part 10 and the upper reinforcement part 10 in which the grout injection hole 12 and the center hole 11 into which the force member 60 is inserted are formed. Hollow guide receiving portion 20 for receiving 50, and a lower reinforcing portion 30 for sealing the lower end of the guide receiving portion. That is, the upper reinforcing portion 10, the guide receiving portion 20 and the lower reinforcing portion 30 are combined with each other to form the reinforcement of the present invention. They can be easily combined and separated by screwing together. The reinforcement 1 configured as described above is preferably made of metal, but may be made of fiber reinforced plastic (FRP) having excellent mechanical strength and durability in consideration of manufacturing cost.

The upper reinforcing portion 10 and the lower reinforcing portion 30 is preferably a disk-shaped cylindrical member, the guide receiving portion 20 is a hollow hollow formed with a space (s) for accommodating the guide member 50 therein It is preferable that it is a cylindrical member.

A central hole 11 is formed at the center of the upper reinforcement part 10, and the force member 60 inserted through the central hole 11 is coupled to the guide member 50. The force member 60 serves to stably reinforce the ground by applying tensile force to the reinforcement 1 and to move the guide member 50 inside the reinforcement as described below. That is, the guide member 50 can be moved inside the reinforcement 1 by pulling the force member 60.

On the other hand, on the circumferential surface of the upper reinforcing portion 10, the horizontal fixed hole 13 is formed in the horizontal direction so as to communicate with the central hole (11). The elastic member 14 and the fixing clamp 15 are inserted into the horizontal fixing hole, and the fixing clamp 15 may be installed in a state in which the elastic fixing member 15 is pressed by the elastic member 14 in the horizontal fixing hole 13. In order to prevent the elastic member 14 and the fixing clamp 15 from being separated in one direction of the horizontal fixing hole 13, a blocking pin (not shown) may be installed inside the horizontal fixing hole 13.

The fastener 15 is coupled to the guide member 50, for example, coupled with the fixing groove 57 formed on the outer circumferential surface of the guide tube 51 of the guide member 50, the guide member raised so that the protruding member 40 is projected It is used to maintain the position of 50.

The guide accommodating part 20 is a hollow cylindrical member having a space s therein to accommodate the guide member 50 therein, and a through hole 21 for protruding the protruding member 40 is formed therethrough. It is. The exit hole 21 is formed larger than the outer diameter of the trunk portion 42 of the protruding member 40 and smaller than the outer diameter of the head portion 41, thereby preventing the protruding member 40 from being completely separated from the exit hole 21. .

Guide grooves 21a may be formed around the exit hole 21 of the guide accommodation portion 20, and the guide grooves may include guide guides 45 formed on the body 42 of the protruding member 40 to be described later. Unevenness can be combined. This uneven coupling serves to prevent rotation of the protruding member when the protruding member 40 protrudes out of the reinforcement.

The lower reinforcing part 30 is combined with the lower end of the guide accommodating part 20 to seal the lower end of the guide accommodating part.

The guide member 50 serves to protrude the protruding member 40 through the lifting in the reinforcement (1). The guide member 50 is formed in a conical shape so as to easily protrude the protruding member 40 through the lifting.

The conical guide member 50 has a hollow guide tube 51, a protrusion guide portion 52 having a conical surface 54 extending from one end of the guide tube 51, and a step 55 outward from the protrusion guide portion 55. It comprises a disk portion 53 is formed in the connection.

In addition, the conical guide member 50 may be disposed such that the disk portion 53 is located below the reinforcement 1.

The outer circumferential surface of the hollow guide tube is formed with a fixing groove 57 for coupling with the fixing bar (15). The fastener 15 is coupled to the fixing groove 57 to maintain the position of the raised guide member 50.

The protruding guide portion 52 extending from the guide tube 51 has an inclined conical surface 54. When the guide member 50 is raised, the conical surface 54 and the head portion 41 of the protruding member 40 come into contact with each other so that the protruding member 40 is radially formed by the reinforcing body 1 through the exit hole 21. It protrudes outward.

The head portion 41 of the protruding member 40 is seated on the step 55 formed in the disc portion 53, so that the position of the protruding protruding member can be maintained.

Meanwhile, when the force member 60 is a steel wire, a tapered hole 58 may be formed on the bottom surface of the disc portion 53 of the guide member 50 for coupling between the steel wire and the guide member 50. The steel wire may be fixedly coupled to the guide member 50 by the tapered cone 65 installed in the tapered hole 58. A cover 66 for closing one end of the steel wire fixed by the tapered cone 65 may be coupled to the bottom of the disc portion 53.

When the resilient material 60 is a steel pipe or steel bar, the steel pipe or steel bar may be screwed with the male screw portion (51a) formed on the top of the guide member (50).

A gap d may be formed between the outer circumferential surface of the disk portion 53 and the inner circumferential surface of the guide accommodation portion 20. In the present invention, the grout is injected into the reinforcement (1) through the grout hose (p) connected to the grout injection hole 12, the grout injected into the reinforcement (1) injection nozzle of the protruding member (40) In order to smoothly move to 44) or at the same time to properly spread the grout in the reinforcement, the grout is preferably filled to the lower reinforcement 30 through the gap. In addition, the grout guide hole 56 is formed through the disk portion 53 so that the grout movement to the lower reinforcing portion 30 can be more smoothly performed.

The protruding member 40 raises the guide member 50 in the reinforcing body 1 to protrude from the reinforcing body, and includes a cylindrical body portion 42 and a head portion 41.

The head portion 41 of the protruding member 40 is provided with a protruding catching jaw 43 in contact with the inner circumferential surface of the reinforcing body 1 to prevent the protruding member 40 from being separated from the reinforcing body 1 when protruding. . In addition, the head part 41 may be seated and fixed to the step 55 formed in the guide member 50 when protruding, so that the protruding state may be maintained firmly.

The protruding member 40 may be prevented from rotating when protruding by the uneven coupling with the exit hole 21 penetrated in the circumferential direction of the guide receiving portion 20 of the reinforcing body (1). That is, the guide protrusion 45 is formed in the trunk portion 42 of the protruding member 40, and the guide groove 21a is formed at one side of the exit hole 21, and the protruding member 40 is formed through the uneven coupling thereof. Can be prevented from rotating.

The rotation of the protruding member is fixed to the direction of the injection nozzle 44 formed in the protruding member 40 when the protruding member 40 is fixed to the inner side wall of the reinforcing hole h. Helps to diffuse spray.

The body portion 42 of the protruding member 40 may form a screw thread or a wedge (not shown) to further increase the fixing force with the ground during protruding.

The protruding member 40 is formed with an injection nozzle 44 for diffusing and spraying the grout injected into the reinforcement body to the outside of the reinforcement body 1. The injection nozzle 44 may include a first injection nozzle 44a parallel to the longitudinal direction of the protruding member 40, and may further include a second injection nozzle 44b formed to be inclined with the first injection nozzle. The direction of the injection nozzle may be appropriately changed in consideration of the diffusion direction of the grout according to the ground state in which the ground reinforcement device is embedded.

The ground reinforcing device according to the present invention is embedded in the reinforcing hole (h) perforated in a state in which the guide member 50 and the protruding member 40 are accommodated in the reinforcement 1. The reinforcement member 1 is coupled to the reinforcement member 1. The pulling member 40 is pulled out to add a tensile force to the reinforcement member. Protrude radially outward; At this time, the guide member 50 can be maintained in its position by using the fastener 15 so that the protruding member 1 protrudes. Thereafter, the grout injection hose (p) is connected to the grout injection hole (12) of the reinforcement (1) to inject the grout (g) into the reinforcement (1), and the injected grout is sprayed by the protruding member 40. The nozzle 44 is diffused and sprayed on the inner wall of the reinforcing hole h.

Therefore, the ground reinforcement device according to the present invention maximizes the shear resistance to the ground by introducing a tensile force to the load before the injection of the grout, as well as to increase the anchoring force of the ground through the projecting member and at the same time using the projecting member Since the grout can be diffused and sprayed, the ground can be reinforced more firmly.

Meanwhile, as shown in FIG. 3, the conical guide member 50 may be disposed inside the reinforcement 1 such that the disc portion 53 is positioned above the reinforcement 1. In this case, the urging member 60 'is a compressive member, and by pressing the urging member 60' and lowering the guide member 50, the protruding member 40 can protrude radially outward of the reinforcing body 1. . Therefore, the ground reinforcement device as shown in Figure 3 can be used as a pile (pile) to reinforce the ground by vertically embedded in the soft ground to add a compressive force.

When the force member 60 'is a compression member, since the final position of the guide member 50 protruding the protruding member 40 is substantially the same as the direction of gravity, the fixing device for maintaining the position of the guide member 50 is May be omitted. In addition, the force member 60 'acting as the compressive material is preferably a steel bar or steel pipe capable of providing a compressive force, and the force member 60' and the guide through the fastening hole 58a formed in the disc portion 53. The members 50 may be screwed together.

As another embodiment according to the present invention, by introducing an auxiliary force member 61 for the ground of weak ground strength to look at the configuration to maximize the ground reinforcement by adding a shear resistance or compressive force to the force member (60) see.

Figure 4 is an exploded perspective view of the ground reinforcement device 100 'according to another embodiment of the present invention, further comprising a force repositioning member, Figure 5 is a ground reinforcement hole (h) of the ground perforated It is sectional drawing when it is buried.

The repositionable fixing member 70 is coupled to the upper end of the reinforcing body 1, the first through hole 71 to communicate with the center hole 11 and the grout injection hole 12 of the reinforcing body, respectively. ) And a second through hole 72 are formed. The elastic repositioning member 70 configured as described above is preferably made of metal, but may be made of fiber reinforced plastic (FRP) having excellent mechanical strength and durability in consideration of manufacturing cost.

And, the repositioning member (70) has a coupling hole (73) to which the auxiliary resilient material (61) is coupled. The coupling hole 73 may be formed to be rotationally symmetric about the second through hole 72 so as to add a substantially uniform tensile force or compression force to the ground reinforcement device. Although FIG. 3 illustrates three coupling holes, the number of coupling holes and auxiliary tension members may be appropriately changed according to the amount of tensile force (or compression force) to be added.

Auxiliary tension member 61 is inserted into the coupling hole 73 is fixedly coupled to the tension repositioning member (70). For example, when the auxiliary tension member 61 is a steel pipe or steel bar, female threads may be formed on the inner circumferential surface of the coupling hole 70, and male screws may be formed on the outer circumferential surface of the steel pipe or steel rod so that they may be screwed together.

On the other hand, as shown in Figure 4, when the auxiliary tension member 61 is a steel wire, the steel wire is coupled to the tapered cone (74) which is fitted to the inner peripheral surface of the coupling hole 70 and secures the end of the steel wire to the force repositioning member ( 70). In this case, the coupling hole 73 is preferably in the form of a tapered hole.

As described above, according to another embodiment of the present invention, the tensioning force or the compressive force required in the ground reinforcement device is further increased by connecting the force repositioning member 70 to which the auxiliary force material 61 is coupled to the upper end of the reinforcement 1. The ground reinforcement can be strengthened by doing so.

According to another embodiment of the present invention, a plurality of ground reinforcement devices in the depth direction of the reinforcing hole (h) may be connected in multiple stages.

In this case, the connection between the ground reinforcing device may be made by screwing the guide member 50 having a male screw portion at one end by forming a connection hole 59 having a female thread portion in the guide member 50. Then, the guide member 50 connected in multiple stages is also accommodated inside the reinforcement connected in multiple stages, and simultaneously raises (or lowers) the guide member 50 connected in multiple stages through the force member 60 in the longitudinal direction of the reinforcement. By simultaneously protruding the protruding members arranged in a plurality of rows, through which the grout (g) can be sprayed multiplely on the inner wall of the reinforcing hole.

7 is a photograph showing the spraying scene when the water is injected into the grout injection hole to determine the spraying performance through the protruding member of the ground reinforcing device according to the present invention, Figure 8 is spraying the grout through the protruding member The photograph shows the distribution of the hardened grout.

As can be seen through Figures 7 and 8, using the protruding member according to the present invention can be sprayed to the grout to the inner wall of the reinforcing hole, through which compared to the conventional anchor structure to simply increase the ground anchoring force It can be seen that the ground can be effectively reinforced.

All simple modifications or changes of the present invention can be easily made by those skilled in the art, and all such modifications or changes should be considered to be included in the scope of the present invention.

1 is an exploded perspective view of a ground reinforcing device according to an embodiment of the present invention.

2 is a view showing a case in which the ground reinforcing device is embedded in the reinforcing hole according to an embodiment of the present invention.

3 is a view showing a case in which the ground reinforcing device is embedded in the reinforcing hole according to another embodiment of the present invention.

Figure 4 is an exploded perspective view of the ground reinforcement device according to another embodiment of the present invention.

5 is a view showing a case in which the ground reinforcing device is embedded in the reinforcing hole according to another embodiment of the present invention.

6 is a view showing a case in which the ground reinforcing device is disposed in the reinforcing hole according to another embodiment of the present invention.

7 and 8 are experimental pictures illustrating the effect of the diffusion spray of grout in the ground reinforcement device according to an embodiment of the present invention.

Claims (10)

In the ground reinforcement device embedded in the reinforcement hole of the perforated ground to reinforce the ground, A reinforcement having a grout injection hole formed therein for injection of grout thereon; A protruding member inserted into an exit hole formed around the reinforcement and having an injection nozzle for injecting the grout into an inner wall of the reinforcing hole; A conical guide member movable in the longitudinal direction of the reinforcement and protruding the protruding member from the reinforcement through interference with the protruding member; And It includes a force member connected to the guide member through the center hole of the reinforcement, The protruding member is ground reinforcement device having a protruding member for grout injection, characterized in that to protrude from the reinforcement by moving the guide member through the force member. The method of claim 1, The guide member includes a hollow guide tube, a protruding guide portion having a conical surface extending from one end of the guide tube, a disc portion connected to form a step in the outward direction from the protruding guide portion, The ground reinforcement device having a protruding member for grout injection, characterized in that the head portion of the protruding member is seated on the step of the guide member when the protruding member protrudes. The method of claim 2, The tension member is a tension member that adds tensile force to the reinforcement, The guide member is ground reinforcement device having a grout injection projection member, characterized in that the disk portion is disposed to be located below the reinforcement. The method of claim 2, The tension member is a compression member that adds a compressive force to the reinforcement, The guide member is a ground reinforcement device having a grout injection projection member, characterized in that the disk portion is disposed so as to be located above the reinforcement. The method of claim 2, Ground reinforcement device having a grout injection projection member characterized in that the grout guide hole is formed through the disk portion of the guide member. The method of claim 1, The head portion of the protruding member is provided with a protruding engaging jaw in contact with the inner circumferential surface of the reinforcement, the protruding member is projected for grout injection, characterized in that the transition is prevented when protruding by the uneven coupling between the exit hole Ground reinforcement device provided with a member. The method of claim 1, The reinforcing body includes an upper reinforcing part through which the grout injection hole and the center hole are formed, a hollow guide receiving part coupled to a lower end of the upper reinforcing part to receive the guide member, and a lower reinforcing part sealing the lower end of the guide receiving part. Ground reinforcement device having a grout injection projection member, characterized in that. The method of claim 7, wherein The upper reinforcing part includes a horizontal fixed hole formed in the horizontal direction in communication with the center hole, The horizontal fixing hole is a ground reinforcing device having a grout spraying projection member, characterized in that the clamp is pressed by the elastic member is installed to maintain the position of the guide member through engagement with the guide member. The method of claim 1, It is coupled to the upper end of the reinforcement, and further comprising a repositionable force fixing member opening to communicate with the grout injection hole and the center hole of the reinforcement, Ground reinforcement device having a protruding member for grout injection, characterized in that the resilient fixing member is formed with a coupling hole to which one or a plurality of auxiliary supporting members are coupled. The method of claim 1, The ground reinforcement device, Ground reinforcement device having a projecting member for grout injection characterized in that the plurality of ground reinforcement device is connected in multiple stages through the connection hole formed in the guide member.

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