KR100697629B1 - Grout injector and nailing apparatus having the same - Google Patents

Abstract

A grout injector and a nailing apparatus including the same are provided to inject grout into a bore quickly and securely by supporting the grout injector with an expansion sheet, and to stabilize the ground by nailing with the grout injector. A grout injector includes a steel pipe(100), a division unit(200) longitudinally dividing the steel pipe, a grout injection pipe(300) injecting grout, and an expansion sheet(400) contacted in a bore in expanding. An expansion hole(110) is communicated with an expansion region(410), and plural discharge holes(120) are formed in an outer periphery of the steel pipe to discharge grout. A check valve(700) is installed in the discharge hole to discharge grout out of the steel pipe. A support plate(600) is fixed at an end of the steel pipe to support the grout injection pipe, and a sealing member(800) is mounted at the other end of the steel pipe to close the steel pipe. A caulking injection pipe(500) is connected to the expansion region of the expansion sheet. An end of the caulking injection pipe is exposed in the support plate, and the other end is inserted to the steel pipe, bent and connected to the expansion hole. Grout is injected to the caulking injection pipe to expand the expansion region of the expansion sheet.

Description

GROUT INJECTOR AND NAILING APPARATUS HAVING THE SAME}

1 is a plan view showing a grouting injection device according to the prior art.

Figure 2a is a block diagram showing a grouting injection device according to the present invention.

2B and 2C are enlarged views of portions "A" and "B" of FIG. 2A in an enlarged view.

Figures 3a and 3b is a partial side cross-sectional view and front view showing a grouting injection device according to another embodiment of the present invention.

Figure 4 is an operational state diagram showing a grouting injection device according to another embodiment of the present invention.

Figures 5a and 5b is a partial side cross-sectional view and front view showing a grouting injection device according to another embodiment of the present invention.

Figure 6 is an operational state diagram showing a grouting injection device according to another embodiment of the present invention.

Figures 7a and 7b is a side cross-sectional view showing a nailing device according to the present invention.

8a to 8d is an operational state diagram showing the construction process of the grouting injection device according to the present invention.

<Code Description of Main Parts of Drawing>

100: steel pipe 110: expansion hole

200: partition means 210: support pipe

220: stretching member 230: pressing member

300: grout injection pipe 400: expansion sheet

410: expansion space 500: caulking injection pipe

600: support plate 700: check valve

800: sealing member 900: drilling hole

1000: grouting injection device 1100: support plate

1200: nut member 1300: fixed cover

The present invention relates to a grouting injection device and a nailing device including the same, wherein the grouting injection device is tightly fixed to the inner surface of the drilling hole by expansion of the expansion sheet and the grouting operation is made, and the grouting injection device capable of nailing operation and the same It relates to a nailing device comprising.

In general, the grouting injection device is for injecting grout into the perforated and perforated space in the ground or rock to improve and reinforce the ground of the tunnel excavation surface, soft paper, or incision. Insert the grout and inject the grout to reinforce or reinforce the ground, and to detect cracks and cavities in the rock during tunnel excavation to form a drill hole of a certain diameter and to grout the drill hole.

As shown in Figure 1, the grouting injection device according to the prior art is provided with a hollow rod 10 is inserted into the drilling space 20 perforated on the tunnel excavation surface, supplying the grout to the hollow rod 10 and perforated An injection tube 11 is inserted into the hollow rod 10 so that grout is filled between the spaces 20.

For example, the outer circumferential surface of the hollow rod 10 is formed with a discharge hole 13 for discharging the grout at regular intervals so that the grout can be filled in the space between the pre-drilled drilling space 20 and the hollow rod 10. In addition, an opening in which the injection tube 11 is inserted is formed at the front end of the hollow rod 10, and the outer periphery of the opening is sealed between the hollow space 10 and the perforated space 20 of the previously bored ground. The packing member 30 is installed to provide a sealing member 12, and a sealing member 12 is provided at an end of the injection tube 11 to prevent the outflow of grout injected through the injection tube 11.

However, the conventional grouting injection device has a disadvantage that the installation of the grouting injection device is unstable because the coupling between the puncture space 20 and the packing member 30 of the perforated ground is not made properly. In addition, during the grouting operation, the injection tube is drawn out of the hollow rod and the grouting is performed, resulting in a long working time and a decrease in working efficiency.

An object of the present invention is to solve the problems of the prior art described above, to provide a grouting injection device and a nailing device comprising the same and the grouting operation is performed at the same time the grouting installation and installation of the grouting injection device.

In order to achieve the above object, the present invention, the steel pipe is inserted into the drilling hole, the partition means for partitioning the inner longitudinal direction of the steel pipe to form a partition space, a grout injection pipe for injecting grout into the partition space, when expanding It includes an expansion sheet surrounding the outer circumferential surface of the steel pipe to form an expansion space to be in close contact with the inner surface of the drilling hole.

In this case, it is preferable that a plurality of expansion holes communicating with the expansion sheet are formed in the longitudinal direction and spaced apart from each other, and a caulking injection tube communicating with the expansion space of the expansion sheet located at the distal end of the steel pipe is installed at the front end of the steel pipe. In addition, the caulking injection pipe is fixed to the support plate for supporting the grout injection pipe at the tip of the steel pipe can be inserted into the inside of the steel pipe is installed, the caulking injection pipe is directly in the expansion sheet located at the tip of the steel pipe After being inserted, it may be packed and installed, and the caulking injection pipe may be inserted through a sleeve into an expansion sheet located at the tip of the steel pipe.

In addition, the steel pipe is formed with a plurality of discharge holes spaced apart in the longitudinal direction, the discharge hole may be provided with a check valve for flowing the grout in one direction, the partition means is supported extending extending in the inner longitudinal direction of the steel pipe It may include a pipe, an elastic member installed at a predetermined position of the support pipe, and a crimping member for crimping the opposing surfaces of the elastic member to increase the outer diameter of the elastic member to closely contact the inner surface of the steel pipe.

Nailing device according to the present invention is a grouting injection device that the screw thread is formed on the outer peripheral surface of the steel pipe in the above-described configuration, the support plate which is in close contact with the ground by penetrating the front end of the steel pipe, and is rotatably coupled to the outer peripheral surface of the front end of the steel pipe It is configured to include a nut member installed in close contact with the support plate.

In this case, a fixing cover for fixing the front end of the steel pipe is further installed at the front end of the grouting injection device, and the fixing cover has a container-shaped cover part with one side open to accommodate the front end of the grouting injection device, and the cover It is fixed to the inside of the part may include a rotating part that is rotationally coupled to the outer peripheral surface of the tip of the steel pipe.

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2a is a block diagram of a grouting injection device according to the present invention, Figures 2b and 2c is an enlarged view of the "A" and "B" portion of Figure 2a.

As shown in Figure 2a to 2c, the grouting injection device 1000 according to the present invention is a steel pipe 100, the partition means 200 for partitioning the steel pipe 100 in the longitudinal direction and the grout injection The grout injection pipe 300 is configured to include an expansion sheet 400 that is in close contact with the inner surface of the drilling hole 900 during expansion.

Specifically, the outer circumferential surface of the steel pipe 100 is formed with an expansion hole 110 in communication with the expansion space 410 of the expansion sheet 400 to be described later, a plurality of discharge holes 120 for the incoming grout is discharged to the outside ) Are spaced apart in the longitudinal direction. At this time, the discharge hole 120 is provided with a check valve 700 for selectively discharging the grout introduced into the steel pipe 100 to the outside of the steel pipe 100. That is, when the grout in the steel pipe 100 is filled in a predetermined amount, the check valve 700 discharges the grout to the outside of the steel pipe 100 through the discharge hole 120 by an increase in the internal grout pressure generated at this time. In addition, the check valve 700 prevents the discharged grout from flowing back into the steel pipe 100 again.

An expansion sheet 400 is installed on an outer circumferential surface of the steel pipe 100. The expansion sheet 400 is expanded radially when the grout is introduced from the expansion hole 110 so that the space between the drilling hole 900 and the steel pipe 100 is sealed. To this end, the edge of the expansion sheet 400 is fixed along the outer circumference of the steel pipe 100, the expansion space 410 between the inner edge of the fixed expansion sheet 400 and the outer peripheral surface of the steel pipe 100 Is formed. At this time, the connection portion of the steel pipe 100 and the expansion sheet 400 is preferably packed to be watertight. As such, since the expansion sheet 400 is expanded in accordance with the injection of the grout is formed on the outer circumferential surface of the steel pipe 100, the steel pipe 100 inserted into the drilling hole 900 to the inner wall of the drilling hole 900 Can be supported by.

A support plate 600 for supporting the grout injection pipe 300 is fixedly installed at the end of the steel pipe 100, and a sealing member 800 for closing the end of the steel pipe 100 is provided at the end of the steel pipe 100. Is installed. Here, the support plate 600 is formed in a shape corresponding to the diameter of the steel pipe 100, the edge is fixed to the front end of the steel pipe 100, the support plate 600, the grout injection pipe 300 is An unshown through hole is formed for insertion fixing.

The grout injection pipe 300 has one end fixed to the support plate 600 and the other end extends in the longitudinal direction of the inner side of the steel pipe 100 so that the grout is divided into the partition space 240 formed by the partition means 200. Allow inflow. As in the present embodiment, when two compartments 240 are formed in the steel pipe 100, the grout injection pipe 300 is a grout in the compartment space 240 formed at the end of the steel pipe 100 The first grout injection tube 300a for injection and the second grout injection tube 300b for injecting grout into the partition space 240 formed at the distal end portion of the steel pipe 100 are not limited thereto. The configuration of the grout injection tube 300 may be changed into various structures according to the number of partition spaces 240. For example, when the three partition space 240 is formed in the steel pipe 100 by the partition means 200, the grout injection pipe 300 is three grout injection pipe ( 300, and when four compartments 240 are formed in the steel pipe 100, the grout injection pipe 300 is divided into four grout injection pipes 300 so as to correspond to the compartment spaces 240. It may be configured.

The partition means 200 is for forming a plurality of partition spaces 240 in the steel pipe 100, the support pipe 210 is formed extending in the longitudinal direction of the steel pipe 100, and the support pipe 210 Stretch member 220 is installed at a predetermined position of the) and the pressing member 230 for crimping the opposite surface of the elastic member 220. That is, the support pipe 210 has a structure in which one end thereof is in communication with the first grout injection tube 300a and the other end thereof extends in the longitudinal direction in the steel pipe 100, and the inside thereof is the first grout injection. It serves as a moving passage of the grout flowing from the pipe (300a). In addition, the other end of the support pipe 210 is provided with a compression member 230 for compressing the elastic member 220 and the elastic member 220, wherein the elastic member 220 is the compression member 230 It is made of a flexible material that is stretchable when pressed by the pressing member, and the pressing member 230 has an area corresponding to the contact area of the stretching member 220 and is compressible to both opposing surfaces of the stretching member 220. Is placed.

On the other hand, a separate caulking injection pipe 500 may be connected to the expansion space 410 of the expansion sheet 400 located at the front end of the steel pipe 100. At this time, one end of the caulking injection pipe 500 is exposed to the support plate 600, the other end of the caulking injection pipe 500 is inserted into the steel pipe 100 through the support plate 600 and then bent to the The caulking injection pipe 500 is in communication with the expansion space 410 of the expansion sheet 400 by being connected to the expansion hole 110 formed at the tip of the steel pipe 100. That is, the caulking injection pipe 500, in addition to the grout injected through the grout injection pipe 300 to expand the expansion space 410 of the expansion sheet 400 located at the tip of the steel pipe 100, a separate grout Acts as a passage through which

3A and 3B are views showing a partial side cross-sectional view and a front view of a grouting injection device according to another embodiment of the present invention, Figure 4 is a view showing an operating state of the grouting injection device according to another embodiment of the present invention. .

In another embodiment, as shown in Figures 3a and 3b, the expansion sheet 400 located at the front end of the steel pipe 100 is a caulk injection pipe 500 of the straight pipe shape is inserted from the outside of the steel pipe 100. ) May be connected. For example, the caulking injection pipe 500 is inserted into and installed in close contact with the expansion sheet 400 and the steel pipe 100 is installed in communication with the expansion space 410 of the expansion sheet 400. Accordingly, as shown in FIG. 4, when the grout is injected into the expansion space 410 of the expansion sheet 400, the expansion sheet 400 surrounding the outer circumferential surface of the steel pipe 100 is in a radial direction of the steel pipe 100. Expanded to the steel pipe 100 may be fixed to the drilling hole (900).

In addition, as shown in Figures 5a and 5b, the caulking injection pipe 500 is the expansion space 410 of the expansion sheet 400 through a separate sleeve 610 for fixing the expansion sheet 400 Can be inserted in For example, the sleeve 610 is formed in an annular shape in which the front end of the steel pipe 100 is fixed to the inside, the end of the sleeve 610 is fixed to the expansion sheet 400 is installed, one side of the sleeve 610 The caulking injection pipe 500 is penetrated. Accordingly, as shown in FIG. 6, when the grout is injected into the expansion space 410 of the expansion sheet 400, the expansion sheet 400 surrounding the outer circumferential surface of the steel pipe 100 is in a radial direction of the steel pipe 100. Expanded to the steel pipe 100 may be fixed to the inner surface of the drilling hole (900).

Figure 7a and 7b is a side cross-sectional view of the nailing device according to the present invention.

As shown in FIGS. 7A and 7B, the nailing apparatus 2000 according to the present invention penetrates the grouting injection device 1000 having the above-described configuration and the steel pipe 100 of the grouting injection device 1000. It comprises a support plate 1100 in close contact with the ground, and a nut member 1200 in close contact with the support plate 1100.

For example, the grouting injection device 1000 is a steel pipe 100, the threaded 130 is formed on the outer peripheral surface of the tip, the partition means 200 for partitioning the inside of the steel pipe 100 in the longitudinal direction, and the grout for injecting grout The injection pipe 300 and the expansion sheet 400 which is in close contact with the inner surface of the drilling hole 900 is configured to include. Here, since the configuration other than the steel pipe 100 in which the thread 130 is formed is the same as the configuration of the grouting injection apparatus 1000 described above, a detailed description thereof will be omitted.

The support plate 1100 has a plate shape through which the steel pipe 100 of the grouting injection apparatus 1000 penetrates to the center thereof, and one surface of the support plate 1100 is in contact with the ground, and the other surface of the support member 1100 is described below. 1200) is a structure that is in close contact with the ground through the tightening.

The nut member 1200 has a diameter corresponding to the inner diameter of the steel pipe 100 of the grouting injection device 1000, and is rotatably coupled along the thread 130 formed in the steel pipe 100 to support the plate ( 1100 is in close contact with the ground.

In this case, a fixing cover 1300 for restricting the flow of the grouting injection device 1000 may be further installed at the front end of the grouting injection device 1000. That is, the fixing cover 1300 has a container shape in which one surface is opened, a cover part 1310 accommodating the front end portion of the grouting injection device 1000, and a fixed portion installed inside the cover part 1310 to fix the steel pipe. It is configured to include a rotating portion 1320 is rotationally coupled to the outer peripheral surface of the tip (100). The fixing cover 1300 maintains the tensile state of the steel pipe 100 when the steel pipe 100 of the grouting injection device 1000 is tensioned by tightening the nut member 1200.

Referring to the construction process through the grouting injection device of such a configuration as follows.

8a to 8d is a view showing the construction process of the grouting injection device 1000 according to the present invention.

First, as shown in Figure 8a, to form a drilling hole 900 in the ground for reinforcing the tunnel or slope, and then install the grouting injection device 1000 according to the present invention. At this time, when the grout is injected through the caulking injection pipe 500, the expansion space 410 of the expansion sheet 400 located at the distal end of the steel pipe 100 is expanded while being filled by the incoming grout, and drilled holes ( The steel pipe 100 inserted into the 900 is primarily supported in the drilling hole 900 by the expansion of the expansion sheet 400.

As shown in FIG. 8B, when the expansion of the expansion sheet 400 located at the front end of the steel pipe 100 is completed, the partition space 240 formed in the steel pipe 100 through the first grout injection pipe 300a. Inject grout into When grout is injected into the partition space 240, the grout flows through the expansion hole 110 into the expansion space 410 of the expansion sheet 400 to expand the expansion sheet 400. As shown in FIG. 8C, when the expansion space 410 is full, the grout is discharged to the outside of the steel pipe 100 through the check valve 700 of the discharge hole 120. That is, the grout introduced into the partition space 240 first flows into the expansion space 410 to expand the expansion sheet 400 so that the steel pipe 100 is tightly supported in the drilling hole 900, and the expansion sheet When the 400 and the compartment 240 is filled, the check valve 700 is opened by the internal pressure, and the grout filled in the compartment 240 is discharged to the outside of the steel pipe 100.

Subsequently, as shown in FIG. 8D, when the grout is injected into the partition space 240 through the second grout injection pipe 300b, the introduced grout is filled in the partition space 240 and then check valve 700. Through the steel pipe 100 is discharged to the outside. Since the injection of such grout is made in a batch, the present invention enables rapid grouting construction.

In addition, the nailing process using the grouting injection device of such a configuration will be described as follows.

Referring again to FIG. 7A, when the grouting construction by the grouting injection device 1000 is completed, the support plate 1100 is installed on the ground through the front end of the grouting injection device 1000 to support the nut member 1200. After tightly installing the plate 1100, the nut member 1200 is tightened to tension the steel pipe 100. At this time, the nut member 1200 is to press the reinforcing plate (1100) installed on the ground to be in close contact with the ground firmly, through which the ground is closely reinforced, preventing the ground collapse by the flow of the steel pipe (100) You can do it.

Referring again to FIG. 7B, when the steel pipe 100 of the grouting injection device 1000 is tensioned by tightening the nut member 1200, a fixed cover 1300 is installed at a distal end of the steel pipe 100. Fixing the front end portion of the steel pipe 100 so that the tensile state of the 100 is continuously maintained.

As such, when the steel pipe of the grouting injection device 1000 is tensioned, the support plate 1100 is firmly fixed to the ground, and the soil is reinforced by pulling the internal soil sand by the tensile force of the steel pipe 100. Can be obtained. In addition, since the soil is integrated by the tensioned grouting injection device 1000, it is possible to prevent the soil from falling down or falling rocks from the rock wall to obtain stable ground.

In the present embodiment, after the grouting construction is completed by the grouting injection device 1000, the nailing operation is performed through the process of further adding the components of the nailing device 2000 to the grouting injection device 1000, The grouting work and the nailing work may be performed through the nailing device 2000 including the grouting injection device 1000 and other components.

While the invention has been shown and described with respect to specific embodiments thereof, it will be appreciated that the invention can be variously modified and varied without departing from the spirit or scope of the invention as provided by the following claims. It will be obvious to those of ordinary skill.

As described above, according to the present invention, since the grouting injection device is supported through the expansion sheet at the same time the batch injection of the grout in the drilling hole has the advantage that the rapid grouting operation is made. In addition, the present invention has the advantage that the efficiency of the grouting operation can be increased, and the grouting construction safety can be expected.

In addition, the present invention has the advantage that can be formed at the same time through the grouting injection device to prevent the fall of earth and sand falling through the nailing structure to form a stable ground.

Claims (11)

delete delete delete delete In the grouting injection device comprising a steel pipe, a partition means, a grout injection pipe, an expansion sheet and a caulk injection pipe inserted into the drilling hole, The caulking injection pipe Grouting injection device, characterized in that the packing is installed after being inserted directly into the expansion sheet located on the tip of the steel pipe. In the grouting injection device comprising a steel pipe, a partition means, a grout injection pipe, an expansion sheet and a caulk injection pipe inserted into the drilling hole, The caulking injection pipe Grouting injection device, characterized in that inserted through the sleeve to the expansion sheet located on the tip of the steel pipe. In the grouting injection device comprising a steel pipe, a partition means, a grout injection pipe, an expansion sheet and a caulk injection pipe inserted into the drilling hole, The steel pipe is formed with a plurality of discharge holes spaced apart in the longitudinal direction, The grouting injection device, characterized in that the discharge hole is provided with a check valve for flowing inlet grout in one direction. The method according to claim 7, The partition means A support pipe extending in the inner longitudinal direction of the steel pipe; An elastic member installed at a predetermined position of the support pipe; Grouting injection device characterized in that it comprises a pressing member for pressing the two opposite surfaces of the elastic member so that the outer diameter of the elastic member is in close contact with the inner diameter surface of the steel pipe. A grouting injection device configured according to any one of claims 5 to 8, wherein a thread is formed on the outer peripheral surface of the tip of the steel pipe; A support plate penetrating the front end of the steel pipe to be in close contact with the ground; Nailing device comprising a nut member is rotatably coupled to the outer peripheral surface of the front end of the steel pipe is in close contact with the support plate. The method according to claim 9, At the front end of the grouting injection device Nailing device, characterized in that the fixing cover for fixing the front end of the steel pipe is further installed. The method according to claim 10, The fixing cover A cover portion having a container shape, the surface of which is opened to accommodate the front end portion of the grouting injection device; Nailing device characterized in that it is fixed to the inside of the cover portion is rotated to be coupled to the outer peripheral surface of the front end of the steel pipe.

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