KR20210006070A - Grouting Inductive Pipe with Variable Rotation Wings And Grouting Method Using It - Google Patents

Abstract

The present invention provides a grouting injection inducing pipe for filling cavities including variable rotating wings. The grouting injection inducing pipe for filling cavities can fill the cavities with the equal amount and pressure without a limitation of an angle of repose by expanding a grouting diffusion width of a filler even while the filler is a particle filler. Accordingly, the grouting injection inducing pipe for filling cavities including the variable rotating wings can have an interval of injection holes for filling formed to be wider than an existing interval and safely perform grouting even in the cavities having the weak ground without a concern of subsidence, thereby improving efficiency, economic feasibility, and stability of grouting construction.

Description

Grouting Inductive Pipe with Variable Rotation Wings And Grouting Method Using It}

The present invention relates to a grouting injection guide pipe provided with a variable rotary blade and a grouting filling method for preventing ground subsidence using the same.

Unlike large-scale underground spaces, abandoned mines or naturally occurring limestone caves are left unattended without sufficient reinforcement, and there is a risk of ground depression. In order to suppress the ground depression, a grouting method for filling the cavity of the abandoned mine and the limestone cave with a filler has been studied. Most of the general grouting method for filling the cavity of the abandoned mine or limestone cave is simply filling the material in the cavity based on natural flow and water pressure. Since it is difficult to control the material dispersion of these existing grouting methods, accurate information on the cavity such as the current status of the cavity, whether or not the cavity is flooded, the connection of the cavity, the condition of the arrangement of underground obstacles, etc., and the water supply method, filling material, and filling in order to maximize the charging effect. Particle size and filling facility installation space should be thoroughly reviewed.

In addition, the existing grouting method has the characteristic that the gap between the filling holes installed for filling needs to be narrowed because the filling is possible only by the angle of repose formed when the material injected from the top falls into the bottom cavity. . If the space between the filling holes is narrow, there is a problem in that economical efficiency is deteriorated because a number of filling holes must be secured through repeated drilling operations, and there is a problem in that the construction is not efficiently performed when the space and space are narrow compared to the cavity size. In addition, in the case of soft ground, there is a possibility of ground subsidence due to repetitive drilling work, so there were cases where the use of drilling equipment was restricted.

Korean Patent Registration No. 10-1148175 describes an apparatus and method for filling the tunnel by forming a hole in a tunnel of an abandoned mine and injecting a filler material. A diffusion plate member was formed in the diffusion portion from which the filling was discharged, so that the filling was filled in a wider range than the angle of repose. However, since the diffusion plate member is formed only the width of the diffusion portion, there is a limitation in extending the filling range, and there is a problem in that the filling exceeding the angle of repose cannot be made after the filling is sufficiently accumulated.

The patent documents and references mentioned in this specification are incorporated herein by reference to the same extent as if each document was individually and clearly specified by reference.

Korean Patent Registration 10-1148175

An object of the present invention is to expand the grouting diffusion width without limiting the angle of repose by dispersing the filler in an equal amount and pressure in the grouting filling method for preventing ground subsidence by filling the mining area or limestone cavity of an abandoned mine or limestone cave. It is to improve construction quality and improve economy.

Other objects and technical features of the present invention are presented in more detail by the following detailed description, claims, and drawings.

To this end, the present invention provides a grouting injection guide pipe for filling a cavity including a variable rotary blade.

The grouting injection guide pipe for filling the cavity is inserted into the cavity through the injection hole drilled from the ground surface to the cavity, and the variable rotary blade spreads and rotates inside the cavity, striking and scattering the injected filler, thereby spreading grouting without limiting the angle of repose. It is characterized by increasing the width.

The present invention provides a grouting filling method for preventing ground subsidence using a grouting injection guide pipe for cavity filling, comprising the following steps:

The first step: forming an injection hole by drilling from the ground surface to the cavity;

Step 2: installing a casing in the injection hole;

Third step: inserting a grouting injection guide tube for filling a cavity including a variable rotary blade into the injection hole in which the casing is installed;

Step 4: Spreading the variable rotary blade inside the cavity and rotating it using a motor;

Step 5: Injecting a filler into the injection hole; And

Step 6: After the injection of the filler is finished, the rotation of the variable rotary blade is stopped and folded to remove the cavity filling grouting injection guide pipe from the injection hole.

The present invention provides a grouting injection guide tube for filling a cavity comprising a variable rotary blade. If the grouting injection guide pipe for cavity filling of the present invention is used, even a particulate filler can be filled with an equal amount and pressure without limiting the angle of repose by expanding the grouting diffusion width of the filler. Therefore, the spacing of the filling injection hole can be formed wider than the conventional spacing, and the grouting filling can be safely performed even in a cavity with weak ground without fear of subsidence, thus improving the efficiency, economy and stability of the grouting filling construction. have.

1 shows a grouting injection guide pipe for filling a cavity including a variable rotary wing of the present invention, and shows a state in which the variable rotary wing composed of a flexible metal is folded and unfolded.
Figure 2 shows a grouting injection guide pipe for filling the cavity including the variable rotary blade of the present invention, and shows the state in which the variable rotary blade made of an elastic material is folded and unfolded.
3 shows a grouting injection guide pipe for cavity filling including a variable rotary wing according to the present invention, and shows a state in which the variable rotary wing connected by the hinge is folded and unfolded.
Figure 4 shows a grouting filling method for preventing ground subsidence using a grouting injection guide pipe for filling a cavity in which the variable rotary blade of the present invention is made of a soft material.
5 shows a grouting filling method for preventing ground subsidence using a grouting injection guide pipe for filling a cavity in which the variable rotary blade of the present invention is made of an elastic material.
6 shows a grouting filling method for preventing ground subsidence using a grouting injection guide pipe for filling a cavity in which the variable rotary blade of the present invention is hinged.

Features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, terms or words used in the present specification and claims are based on the principle that the inventor can appropriately define the concept of terms in order to describe his or her invention in the best way. It must be interpreted as a corresponding meaning and concept.

The present invention provides a grouting injection guide pipe 10 for filling a cavity including a variable rotary blade 11. The cavity 40 may be a mining site in a mine or a lime cavity in a lime cave, and may be a cavity formed by draining groundwater that is the cause of a sink hole recently occurring in the city center. Preferably, the cavity 40 may be a mining area of a mine or a lime cavity of a lime cave, and more preferably a mining area of a mine.

Conventionally, in order to prevent ground subsidence due to the mining of the mine, a method of reinforcing by performing grouting on the upper part of the mining area was mainly used. However, the reinforcement for the upper part of the mine is a local reinforcement method, and there is a limit as a method of preventing ground subsidence by a mine that has already been mined. Therefore, there is a trend of increasing demand for a method of reinforcing the ground by directly filling the inside of the mine.

The present invention is to solve the problem that the conventional grouting filling method using free fall is limitedly used by the angle of repose of the filler in filling the filler by the grouting method in the mining area, and includes a variable rotary blade (11). After inserting the grouting injection guide pipe 10 into the cavity, the variable rotary blade 11 is spread and rotated to hit the injected filler 60. Since the filler 60 hit by the variable rotary blade 11 is scattered regardless of the angle of repose, it is accumulated with an equal amount and pressure, thereby enabling even reinforcement to the ground.

The grouting injection guide pipe 10 for filling the cavity of the present invention is inserted into the cavity 40 through the injection hole 20 drilled from the ground surface to the cavity 40. Conventional grouting pipes including blades have been used only to improve perforation efficiency while rotating the firmly fixed blades. On the contrary, the grouting injection guide pipe 10 of the present invention is inserted into the underground cavity 40 through the filler injection hole 20 in which the casing 21 is already drilled and is not intended for perforation. There is a difference in that the free-falling filler is hit to achieve even grouting regardless of the angle of repose.

The present invention provides a grouting filling method for preventing ground subsidence using the grouting injection guide pipe 10 for filling the cavity. The grouting filling method includes a first step of forming an injection hole 20 by drilling from the ground surface to the cavity 40; A second step of installing a casing 21 in the injection hole 20; A third step of inserting a grouting injection guide tube 10 for filling cavity including a variable rotary blade 11 into the injection hole 20 in which the casing 21 is installed; A fourth step of spreading the variable rotary blades 11 inside the cavity 40 and rotating them using a motor; A fifth step of injecting a filler 60 into the injection hole 20; And a sixth step of removing the cavity filling grouting injection guide pipe 10 from the injection hole 20 by stopping and folding the variable rotary blade 11 after the injection of the filler 60 is finished.

First, a double pipe is piped from the ground surface to the cavity 40 using a boring machine. The cavity may be a mine area of a mine or a lime cavity of a lime cave, and is preferably a mine area of a mine.

When the double pipe is inner tube, the construction starts to the planned depth by pumping the starting water, and the grouting injection guide pipe 10 for cavity filling is inserted, and the filler 60 drills the injection hole 20. The injection hole may be drilled without limitation as long as the filler material 60 freely falls and is injected in consideration of the state in which the grouting injection guide tube 10 for cavity filling is inserted. Preferably, the injection hole 20 is preferably drilled with a diameter corresponding to 3 to 4 times the diameter of the grouting injection guide pipe 10 for filling the cavity. If the diameter of the injection hole 20 is less than 3 times the diameter of the grouting injection guide tube 10 for filling the cavity, the injection speed of the filler may be slowed. Even if the diameter exceeds 4 times, the injection speed is similar.

When the perforation is completed, a casing 21 is installed in the main hole 20 in order to secure the stability of construction. A grouting injection guide tube 10 for cavity filling including a variable rotary blade 11 is inserted into the injection hole 20 in which the casing 21 is installed. When the variable rotary blade 11 is unfolded, it reaches 4 to 10 times the diameter of the grouting injection guide pipe 10 for filling the cavity. Therefore, in the unfolded state, it cannot be inserted into the injection hole 20. However, since the rotating blade of the present invention is of a variable type, there is no problem with the insertion of the injection hole 20 if it is maintained in a folded state.

The grouting injection guide pipe 10 for filling the cavity inserted into the cavity 40 is inserted into the lower ground 50 of the underground cavity and then the variable rotary blade 11 is unfolded.

The variable rotary blade 11 of the present invention is separated by a certain length in the longitudinal direction of the grouting injection guide pipe 10 at a predetermined interval at one end of the grouting injection guide pipe 10 and spreads outward. It is characterized by consisting of a number of variable wings (see Fig. 1).

In detail, the variable rotary blade 11 is configured integrally with the grouting injection induction pipe 10, so that one end of the grouting injection induction pipe 10 is spaced at a certain distance and is at least twice as long as a predetermined length in the longitudinal direction of the grouting injection induction pipe 10. The incision is separated to constitute two or more variable blades, and the variable blades have an open flower shape with a gap extending toward one end of the incision. Therefore, when the grouting injection guide pipe 10 reaches to the lower ground portion 50 of the cavity and applies pressure in the longitudinal direction, the variable blades are unfolded. The variable rotary blade may be made of a ductile metal material. Therefore, when unfolded as described above, the shape is maintained unless drawing is performed using the casing 21.

1 shows an example in which the variable rotary wing 11 is made of a soft metal material, and shows that the variable rotary wing 11 is in a folded or unfolded state. As shown in FIG. 4, the flexible rotating blade 11 made of flexible metal is inserted into the injection hole 20 to reach the lower ground 50 of the cavity 40, and then additional force is applied in the longitudinal direction to rotate the variable type. The wings (11) will be spread. In detail, the variable rotary blade 11 is made of a flexible metal material that is easily bent, and has a flower shape slightly spreading in the direction of the lower ground 50 of the cavity. When it comes into contact with the lower ground 50, the wing It is pushed out and unfolds easily.

Since the variable rotary blade 11 unfolded in the cavity lower ground 50 is raised near the entrance of the injection hole 20 of the cavity 40 and rotates by a connected external motor, it hits the injected filler 60, so the angle of repose It will perform an even charge without limitation. After the filling is completed, the unfolded variable rotary blade 11 is raised in the direction of the surface and passes through the casing 21 of the injection hole 20. In this process, the unfolded variable wing is pulled out while passing through the casing 21 having a smaller direct hit, and is converted to a folded state when first injected. The narrow inlet of the casing 21 serves to pull out the variable rotary blade 11 of the grouting injection guide pipe 10 for filling the cavity made of the unfolded soft metal, so the removed from the injection hole 20 The cavity filling grouting injection guide tube 10 is in a state where the blades before insertion are folded and can be used immediately for the next filling.

The grouting injection guide pipe 10 for cavity filling of the present invention is a variable rotation consisting of a plurality of variable blades extending outward by cutting a certain length in the longitudinal direction of the grouting injection guide pipe at a certain interval at one end An expansion part 12 extending the variable blade 11 outwardly into the inside of the blade 11; and one end is connected to the expansion part 12, and the other end is the grouting injection guide pipe 10 ) Through the operation portion 13 exposed to the outside of the grouting injection induction pipe 10; may further include a wing spreader including (see FIG. 2).

FIG. 2 shows a grouting injection guide pipe 10 for filling the cavity further comprising the wing spreader, and shows that the deformed rotary wing 11 is in a folded or unfolded state.

The variable rotary blade 11 is separated by a certain length in the longitudinal direction of the grouting injection guide pipe 10 at a predetermined interval at one end of the grouting injection guide pipe 10, and a plurality of It characterized in that it is made of variable wings. In detail, the variable rotary blade 11 is configured integrally with the grouting injection guide pipe 10, so that one end of the grouting injection guide pipe 10 is spaced at regular intervals, at least twice a predetermined length in the longitudinal direction of the grouting injection guide pipe 10. The incision is separated to constitute two or more variable blades, and the variable blades have an open flower shape with a gap extending toward one end of the incision. The variable blade is made of an elastic material, and an expansion part 12 is located inside the variable blade which is cut open, and the expansion part 12 penetrates the grouting injection guide pipe 10 and is connected to an operation part exposed to the outside. do. When the operation part 13 is pulled, the expansion part 12 penetrates into the variable blade to unfold the variable blade. The operation part 13 is fixed by a fixing device capable of restricting movement in a pulled state so that the variable blades can be maintained in an unfolded state. When the fixing device is released, the expansion part 12 It is returned to one end of the variable blade by the elasticity of and returns to the folded state.

Therefore, the grouting injection guide pipe 10 for filling the cavity further including the wing spreading part is required to expand the variable wing when the grouting injection guide pipe 10 reaches to the ground lower part 50 of the cavity and applies pressure in the longitudinal direction. There is an advantage of being able to charge after unfolding the variable rotary blade inside the highway without. The grouting injection guide pipe 10 for filling the cavity further including the wing spreading part has a deep cavity, which makes it difficult to reach the lower cavity ground 50, or the ground under the cavity is uneven, and thus expands the variable rotary wing by pressure. It can be useful in difficult cases.

The expansion part 12 may have a rhombus shape or a water drop shape so that it can naturally penetrate into the variable blade by the operation of the operation part 13, and the upper part of the expansion part 12 is in contact with the end of the variable blade. do. In addition, the expansion part 12 has a diameter greater than the diameter of the variable blade, so that friction can be minimized when injected into the casing 21.

The operation part 13 is connected to the expansion part 12 and can be used without limitation as long as it is a material having a tensile strength of a level that can be raised to the ground by overcoming the elasticity of the variable wing, and inducing grouting injection for filling the cavity. A fixing device capable of fixing the operation part 13 to the outside of the tube 10 may be further added.

The elastic material of the variable rotary blade 11 may be a metal material, a plastic material, or a wood material, and the shape can be restored when the external force disappears as it has elasticity to restore the original shape. Can be used without limitation.

As shown in FIG. 5, the variable rotary blade 11 formed of the elastic material is inserted into the injection hole 20 and enters the underground cavity 40, and then pulls up the operation part 13 toward the ground surface. The raised expansion part 12 expands the variable blades, and at this time, the operation part 13 is fixed to maintain the expanded state. The unfolded variable rotary blade 11 strikes the injected filler 60 while being rotated by an external motor so that even charging is performed.

When the charging is completed, the fixing of the operation part 13 is released, and the extension part 12 is released by being pulled up and naturally folded by the elasticity of the variable rotary blade 11. The grouting injection guide tube 10 for filling the cavity in which the blades are folded is removed from the injection hole 20 and is ready to be used for the next filling.

The grouting injection guide tube 10 for cavity filling of the present invention is a variable wing connected to the variable rotary wing 11 to be folded and unfolded through a hinge 11c at one end of the grouting injection guide tube 10 It characterized in that the variable blades are formed in a plurality and further includes an extension part 12 for operating the variable blades to be folded and unfolded (see FIG. 3).

In detail, the variable blade has one end connected through the grouting injection guide pipe 10 and the hinge 11c, and the other end connected through the second variable blade 11b and the hinge 11c. Variable blades (11a); and one end is connected to the other end of the first variable blade (11a) through a hinge (11c), and the other end is connected to one end of the extension part 12 and a hinge ( 11c) and a second variable wing (11b) connected through, wherein one end of the extension part 12 is connected to the other end of the second variable wing 12 through a hinge 11c The other end is exposed to the outside of the grouting injection guide tube 10 by penetrating the grouting injection guide tube 10 (see FIG. 3).

3 shows a grouting injection guide pipe 10 for filling a cavity formed in a structure in which the variable rotary blade 11 is connected by a plurality of hinges 11c to allow the central portion to be folded. In detail, the hinge-type variable rotary wing 11 may include a first variable wing 11a and a second variable wing 11b. One end of the first variable blade 11a is connected through the grouting injection guide pipe 10 and a hinge 11c for filling the cavity, and the other end thereof is the second variable blade 11b and a hinge ( It is connected via 11c). In addition, the other end portion of the second variable wing 11b that is not in contact with the first variable wing 11a, that is, the end portion in the direction of the underground cavity 40, is the expansion part ( 12). In addition, the expansion part 12 is exposed to the outside through the grouting injection induction pipe 10.

Therefore, when the extension part 12 is pulled in the direction of the ground surface, the first variable wing 11a and the second variable wing 11b are folded to come into contact with each other, as if an umbrella is opened, so that the variable rotary wing 11 in an unfolded state. When the variable rotary wing 11 is unfolded, the first variable wing 11a is unfolded toward the ground surface and strikes the filler 60 injected through the injection hole 20, and the second variable wing 11b is It spreads in the direction of the lower ground 50 of the underground cavity.

After the extension part 12 is pulled in the direction of the ground surface of the grouting injection guide pipe 10, the variable rotary blade 11 may be maintained in an unfolded state through an additional fixing device. In addition, the expansion part 12 may be made of a material without ductility, and the variable rotary blade 11 may be unfolded or folded as necessary, as if an umbrella was opened and folded.

6 shows a filling method using a grouting injection guide pipe 10 for cavity filling formed in a structure in which the variable rotary blade 11 is connected by a plurality of hinges 11c to allow the central portion to be folded. First, the grouting injection guide pipe 10 for filling the cavity is inserted into the injection hole, and then the expansion part 12 is pulled in the direction of the ground surface to unfold the variable rotary blade 11. The pull-out extension 12 is fixed through an additional fixing device, and this allows the variable rotary blade 11 to be maintained in an unfolded state. The grouting injection guide tube 10 for filling the cavity in which the variable blades are spread is rotated by an external motor, and the filler 60 injected through the injection hole 20 is hit by the variable blades, so that the angle of repose is equally unrestricted. Charging takes place. When the filling of the filler 60 is completed, the rotation of the variable rotary blade 11 is stopped and the extension 12 is released, so that the grouting injection guide pipe 10 is raised in the direction of the surface. At this time, since the narrow inlet of the injection hole 20 serves as a resistance to fold the unfolded variable rotary blade 11, the grouting injection guide tube 10 for cavity filling removed from the injection hole 20 has a blade before insertion. It can be folded and ready to use for the next charge. In addition, when the extension part 12 is manufactured in a bar shape without ductility, when the grouting injection induction pipe 10 is removed, the extension part 12 is pushed toward the lower ground 50 of the underground cavity, as if folding an umbrella. It is also possible to fold the variable rotary blade 11 first and then remove it from the injection hole 20.

The filler 60 of the present invention is a particulate filler and may be soil, sand, concrete, aggregate, or a mixture thereof. The particulate filler is a filler capable of stably staying on the slope by an angle of repose, and is compared to a semi-solid filler such as mortar flowing down from the slope. In the present invention, since the variable rotary blade 11 strikes and scatters the filler 60, there is an advantage in that uniform charging is possible regardless of the angle of repose. When the particulate filler is filled by the conventional grouting method, the filling becomes uneven due to the angle of repose, and the filler 60 that stays on the slope is accumulated to block the injection hole 20. Therefore, the additional injection hole 20 is further drilled at narrow intervals. Additional charging had to be done. However, since the present invention can evenly fill the particulate filler 60 regardless of the angle of repose, it is possible to perforate the injection holes 20 at wider intervals, and the scattered filler 60 is evenly filled to provide even load. As it is applied, it has the advantage that it can be sufficiently applied to underground cavities with weak lower ground structures.

After the filling is completed, the injection hole 20 from which the grouting injection guide pipe 10 for cavity filling has been removed can be moved to the next filling place after cleaning the inside by additionally flowing perforated water.

What has been described above is only one embodiment for carrying out the present invention, and the present invention is not limited to the above-described embodiment, and the present invention without departing from the gist of the present invention as claimed in the following claims. Anyone with ordinary knowledge in the field to which it belongs will be said to have the technical spirit of the present invention to the extent that various changes can be implemented.

10: grouting injection guide tube 11: variable rotary blade
11a: first variable wing 11b: second variable wing
11c: hinge 12: extension
13. Operating part 20: injection hole
21: casing 30: hollow upper ground
40: cavity 50: cavity lower ground
60: filling

Claims (11)

Grouting injection guide tube for cavity filling with variable rotating blades.
The method of claim 1, wherein the variable rotary blade
Grouting injection induction for cavity filling, characterized in that it consists of a plurality of variable blades that are cut and separated by a certain length in the longitudinal direction of the grouting injection induction pipe at one end of the grouting injection induction pipe and spread outwardly tube.
The method of claim 2, wherein an extension part for expanding the variable blades to an outside of the plurality of variable blades; and one end is connected to the expansion part, and the other end passes through the grouting injection guide pipe A grouting injection induction pipe for cavity filling, characterized in that it further comprises a wing spreading part including; an operation part exposed to the outside of the grouting injection induction pipe.
The method of claim 1, wherein the variable rotary blade is a plurality of variable blades connected to one end of the grouting injection guide pipe to be folded and unfolded through a hinge, and the variable blades are folded and unfolded. Grouting injection induction pipe for cavity filling, characterized in that it further comprises an extended portion to operate.
The method of claim 4, wherein the variable wing
A first variable blade having one end connected to the grouting injection guide pipe through a hinge and the other end connected through a second variable blade and a hinge; and
And a second variable blade having one end connected to the other end of the first variable blade through a hinge and the other end connected to one end of the expansion part through a hinge, and
The extension part is characterized in that one end is connected to the other end of the second variable blade through a hinge, and the other end is exposed to the outside of the grouting injection guide pipe through the grouting injection guide pipe. Grouting injection guide tube for cavity filling.
The grouting injection induction for cavity filling according to claim 1, wherein the variable rotary blade is inserted into the cavity and then unfolded and rotated by a motor while striking and scattering the filler, thereby expanding the grouting spread without limiting the angle of repose. tube.
The grouting injection guide pipe for filling a cavity according to claim 1, wherein the cavity is a mining area of a mine or a lime cavity of a lime cave.
The grouting injection guide pipe for cavity filling according to claim 1, wherein the grouting injection guide pipe for cavity filling is inserted into the cavity through an injection hole drilled from the ground surface to the cavity.
A first step of drilling from the ground surface to the cavity to form an injection hole;
A second step of installing a casing in the injection hole;
A third step of inserting a grouting injection guide pipe for filling a cavity including a variable rotary blade into the injection hole in which the casing is installed;
A fourth step of spreading the variable rotary blade in the cavity and rotating it using a motor;
A fifth step of injecting a filler into the injection hole; And
A sixth step of stopping the rotation of the variable rotary blade after the injection of the filler material is completed, and removing the grouting injection guide pipe for filling the cavity from the injection hole;
Grouting filling method for preventing ground subsidence using a grouting injection induction pipe for cavity filling comprising a.
The grouting filling method for preventing ground subsidence using a grouting injection guide pipe for cavity filling according to claim 9, wherein the filler is a particulate filler.
The cavity according to claim 9, wherein the grouting injection pipe for filling the cavity expands the filling range without limiting the angle of repose since the variable rotary blades spread in the cavity are driven to rotate by a motor and scatter the filler. Grouting filling method for preventing ground subsidence using filling grouting injection guide pipe.

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