KR100971147B1 - Reinforce unit for grouting and soil nailing reinforce method using the same - Google Patents

Abstract

PURPOSE: A grouting reinforcement unit and a soil nailing reinforcement method using the same are provided to improve ground reinforcement by securely attaching a grouting enforcement unit inside a perforated hole. CONSTITUTION: A grouting reinforcement unit(100) comprises a reinforcing member(110), a corrugated pipe(120), and an anchor member(130). The reinforcing member is inserted into the perforated hole formed on the ground. The corrugated pipe is formed to surround the outside of the reinforcing member. A through hole is formed in the corrugated pipe. The anchor member is inserted into the inside of the corrugated pipe. The reinforcing member passes through the anchor member.

Description

Reinforce Unit For Grouting And Soil Nailing Reinforce Method Using The Same}

The present invention relates to a grouting method, and more particularly, to a grouting reinforcing unit which improves structural reinforcement by forming a structure that is uniformly and firmly adhered to the inside of a drilling hole for ground reinforcement, and a soil nailing reinforcement method using the same. will be.

In general, grouting refers to stabilizing the ground by injecting a predetermined grouting material such as cement into the ground for the purpose of preventing leakage or stabilizing soil in civil works.

With the development of industrialization, the development of steep slopes and excavation of tunnels is inevitable for the purpose of road construction or complex construction, which requires stabilization measures to satisfy construction stability, economic feasibility and environmental conservation. have.

To this end, a grouting method for reinforcing using a steel bar is widely used on slopes or the upper side of a tunnel, and the grouting method is used after drilling a plurality of perforation holes in a slope or the upper ground of a tunnel. The steel rod is inserted into the inside, and the grouting material is injected into the boring hole to harden the grouting material injected from the space between the boring hole and the steel bar to reinforce the surrounding ground.

That is, in the grouting method, the efficiency of the reinforcing performance is determined according to how firmly and uniformly the grouting material is injected into the empty space around the hole.

Therefore, in order to increase the efficiency of the grouting method, steel rods of various structures have been developed and used in reinforcement work.

1 and 2 is a view showing a conventional general grouting method, in particular will show that the grouting method is applied to the inclined surface.

First, as shown in FIG. 1, after drilling a plurality of drilling holes (1) from the upper side of the ground for reinforcing the ground of the inclined surface, the steel bar (2) is inserted into each of the drilling holes (1).

As shown in FIG. 2, the ground is reinforced by filling and curing the grouting material through the pipe 8 or the like in the space between the drilling hole 1 and the steel bar 2.

At this time, in the case of pressurized grouting to inject the grouting material at a predetermined pressure, the grouting material is inserted to the fine gap 5 around the perforation hole 1 and then hardened to allow more stable ground reinforcement.

In addition, in some cases, by applying a tensile force to the steel bar and grouting, when the grouting is completely completed until the hardening operation, the compressive force acts up and down on the ground to further strengthen the reinforcement work.

By the way, in the conventional grouting method, there was a structural weakness such that some of the steel rods contacted with moisture or the like, and rusted or severely broken.

In addition, when rock or gravel is present in a portion of the inner side of the drilled hole, the grouting material may not be partially inserted around the vicinity of the rock or gravel, and consequently, the reinforcing work of the part becomes poor after the grouting is completed. There was also a problem.

Furthermore, the grouting material itself also has a problem that a predetermined shrinkage occurs after a certain time, and a portion that occurs between the steel bar and the inside of the drilled hole occurs.

The present invention has been made to solve the above-mentioned problems and disadvantages, the object of the present invention is as follows.

First, the grouting reinforcing unit is to be more tightly adhered to the inside of the drilling hole is to make the overall ground reinforcement is formed more firmly.

Second, the purpose of overcoming the problem that the injection of grouting material is not made in some sections due to obstacles such as gravel or rock in the inner hole.

Third, the purpose of the present invention is to overcome problems such as some loss of the grouting material and a poor contact state with the inside of the hole due to the shrinkage rate after a certain time after the injection of the grouting material.

Fourth, the purpose is to prevent the rust from contact with the steel bar moisture.

In order to achieve the above object, the present invention is a reinforcing unit for grouting work using a drilling hole formed in the ground, the perforation in the form of surrounding the outside of the reinforcing member and the reinforcing member inserted into the drilling hole A corrugated pipe inserted into the hole and having a through hole formed to penetrate the inside / outside and the reinforcing member penetrates and is fixed to the inlet of the drilling hole and is bent outward when external force is applied from the center to the outside. It provides a grouting reinforcement unit comprising a plurality of pieces formed in one end portion and the fixing piece is inserted between the plurality of pieces to maintain the reinforcing member fixed to the fixing block.

Here, it may be configured to further include an anchor member which is inserted into the corrugated pipe so that the reinforcing member is located in the center of the inner corrugated pipe.

And a cover part provided at an outer side of the corrugated pipe to close the through hole when pressed from the outside of the corrugated pipe, and to open the through hole when pressed from the inner side of the corrugated pipe to the outside. have.

On the other hand, the present invention comprises the steps of drilling a hole in the ground and the step of inserting the grouting reinforcing unit into the drilling hole and the step of injecting the grouting material into the hole in the perforated hole of the grouting reinforcing unit and the grouting reinforcing unit Soil using a grouting reinforcing unit comprising the step of injecting the grouting material so as to supplement the filling between the corrugated pipe and the perforation hole that was not fully reinforced when injecting the grouting material into the inner side of the corrugated pipe of the Provide nailing reinforcement method.

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Referring to the effects of the present invention grouting reinforcing unit configured as described above and the grouting reinforcement method using the same as follows.

First, according to the present invention by using a corrugated pipe can be improved after the final solidification of the grouting material by the friction between the corrugated pipe and the inner wall of the drilled hole to increase the adhesion and prevent rust from moisture.

Second, after filling the grouting material to the outside of the corrugated pipe with a plurality of through-holes in the corrugated pipe, the outer filling of the corrugated pipe as well as the auxiliary filling proceeds at the same time when the inner filling of the corrugated pipe is further strengthened as a whole. Reinforcement work is effective.

Third, the one end side of the reinforcing member having a structure that can be opened to the outside by elasticity has the effect of being able to give the pre-stress at the same time using the one end side of the reinforcing member when fixing the reinforcing member.

Fourth, only the area where the gravel or rock, etc. are mainly distributed or the area containing water can be used to bring simplicity and economical effect at the same time as the above-described effect using the corrugated pipe.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. Note that, in the following description, components that are substantially the same in structure and function and can be handled identically can be identified by the same reference numerals.

Hereinafter, with reference to the accompanying drawings illustrating a structure according to a preferred embodiment of the present invention.

Figure 3 is a cross-sectional view showing a grouting reinforcement unit according to an embodiment of the present invention.

As shown, the grouting reinforcing unit 100 according to an embodiment of the present invention is configured to include a reinforcing member 110 and the corrugated pipe (120).

The reinforcing member 110 is formed in the form of an iron steel bar having a predetermined length, and is inserted into the drilling hole (H) along the longitudinal direction.

At this time, the reinforcing member 110 is installed in the drilling hole (H) and the one end exposed to the outside a plurality of elastically bent outward along the circumference over a predetermined section along the longitudinal direction around the center The cutting member 114 is formed.

The cutting member 114 is configured to be cut along a portion of one end portion of the reinforcing member 110, as shown, the center groove 112 is provided in the center of the reinforcing member 110 Preferably, the cutting member 114 is formed to the outside of the central groove 112.

The cutting member 114 is fixed to the outside of the drilling hole (H) while maintaining a state in which a predetermined tensile force is applied to the reinforcing member (110) when the reinforcing member (110) is installed in the drilling hole (H). In order to ensure that the description thereof will be described later in detail.

The corrugated pipe 120 is formed to have a predetermined length in a form surrounding the exterior of the reinforcing member 110. At this time, the corrugated pipe 120 is provided with a plurality of through-holes 123 formed to penetrate the inside / outside of the corrugated pipe 120 along the longitudinal direction.

4 to 6, the through hole 123 is provided on the outer side of the corrugated pipe 120 so that the through hole 123 is pressed inward from the outer side of the corrugated pipe 120. Closed, it is preferable to have a cover portion 124 to open the through-hole 123 when pressed from the inner side to the outer side of the corrugated pipe (120).

As shown, the cover portion 124 is formed larger than the through-hole 123 and at the same time one side of the cover portion 124 is fixed to the corrugated pipe 120, when pressing from the inside out It is preferable that the cover part 124 is folded outward so that the through hole 123 is opened.

In addition, the present invention grouting reinforcement unit 100 is inserted into the corrugated pipe 120 at predetermined intervals, and the anchor member 130 through which the reinforcing member 110 penetrates is provided.

The anchor member 130 is composed of a cylindrical plate-like member, a central groove 131 is provided in the center so that the reinforcing member 110 penetrates and fixed, the groove 132 is formed along the circumference.

In addition, pipes 181 and 183 for injecting grouting materials such as cement are installed inside and outside the corrugated pipe 120, and the pipes 181 and 183 are inserted into and fixed to the recesses 132 of the anchor member 130. Be sure to

In more detail, the outer side of the corrugated pipe 120 is provided with a first pipe 181 for injection of the grouting material and a second pipe 182 for confirming that the injected grouting material is filled in the drilling hole (H). Also, the third pipe 183 for the injection of the grouting material and the fourth pipe 184 for confirming that the injected grouting material is filled in the corrugated pipe 120 are provided inside the corrugated pipe 120.

Here, the first pipe 181 and the second pipe 182 is preferably fixed to the outer side of the corrugated pipe 120 by a separate coupling member 160.

At this time, the coupling member 160 may be a predetermined rubber band or a general tape form, and the first pipe 181 and the second pipe 182 is moved when the external force is applied along the longitudinal direction Each of the pipes to have a coupling force enough to pull out.

And, as described above, the groove 132 of the anchor member 130 is fitted into and fixed to the third pipe 183, and the groove 132 also exerts external force along the longitudinal direction of the third pipe 183. In this case, it is large enough to be moved.

On the other hand, the end side of the corrugated pipe 120 is provided with a stopper tab 128 to close the corrugated pipe 120.

The stopper tab 128 is formed to be coupled to the end of the corrugated pipe 120 by a screw 129, the cover band 127 is wrapped to cover the screwed portion to protect from external grouting material or moisture, etc. It is preferred to be provided.

Referring to the assembly process of the present invention grouting reinforcement unit configured as described above and the process of grouting using the same as follows.

7 is a flowchart illustrating a process of installing the grouting reinforcement unit of the present invention, and FIGS. 8 to 13 are views sequentially illustrating a process of installing the grouting reinforcement unit according to an embodiment of the present invention.

First, as shown in FIGS. 8 and 9, a step of constructing a hole H in the ground is performed (S10).

Next, as shown in FIG. 10, the step of inserting the grouting reinforcement unit 100, the assembly is completed in the drilling hole (H) (S20).

That is, as shown in FIG. 3 described above, the reinforcing member 110 and the anchor member 130 and the respective pipes (181, 182, 183, 184) are installed on the inside and the outside of the corrugated pipe 120 to complete all the assembly The grouting reinforcing unit is inserted into the drilling hole (H).

At this time, it is preferable to temporarily fix the grouting reinforcing unit by inserting a resin or a quick grouting material to the entrance of the drilling hole (H) in which the insertion of the grouting reinforcing unit 100 is completed (S30).

Then, the grouting material is injected into the drilling hole H through the first pipe 181 to the outer side of the corrugated pipe 120 of the grouting reinforcement unit 100 (S40).

The injection of the grouting material to the outside of the corrugated pipe 120 can confirm the degree of injection through the second pipe 182 is shown as shown in FIG.

On the other hand, when the grouting material is injected into the outer side of the corrugated pipe 120, the grouting material may not be completely injected in a section where obstacles such as some gravel or rock are present inside the drilling hole.

In addition, even when the grouting material is completely injected, the grouting material is partially leaked into the gap around the hole or the shrinkage caused by the hardening of the injected grouting material over time, and the size of the grouting material is deformed. Once fully hardened, areas that may not be completely in contact with the drill hole may occur.

To this end, the present invention further comprises a step of injecting a grouting material into the corrugated pipe 120 through the third pipe 183 (S50).

That is, as shown in FIGS. 6 and 12, when the grouting material is injected into the corrugated pipe 120, the grouting material is filled into the corrugated pipe 120 as well as the corrugated pipe by the injected pressure. The grouting material is allowed to flow to the outside of the corrugated pipe 120 through the through hole 123 while pushing the cover part 124 provided outside the 120 to the outside.

After injecting the grouting material up to the inside of the corrugated pipe 120 as described above, as shown in FIG. 13, the fixing block 177 fixed to the external ground with one end of the reinforcing member 110 exposed to the outside. After penetrating), the end of the reinforcing member 110 is positioned on the fixing block 177 by a nut 197, and then a conical fixing piece 195 is inserted into the central groove 112. Let's do it.

At this time, the reinforcing member 110 according to the degree of insertion of the fixing piece 195 forms a state in which the tensile force acts as a whole, the cutting member 114 (see FIG. 3) is opened to the outside fixed to the fixing block 177 Will remain intact.

That is, according to the present invention by pressing and inserting the fixing piece 195 between the cutting member 114 to achieve a state in which a predetermined tensile force is applied to the reinforcing member 110 and at the same time the reinforcing member 110 is fixed to the Since it is possible to maintain a fixed state in the block 177, a more advantageous structure for the reinforcement of the ground and at the same time there is an effect that is very easy to work.

On the other hand, Figure 14 is a view showing a state in which the grouting reinforcement unit is installed according to another embodiment of the present invention.

As shown, the corrugated pipe 120 in the grouting reinforcement unit according to the present invention is not provided over the entire area of the reinforcing member 110, the corrugated pipe 120 may be provided only in a predetermined area. .

That is, the corrugated pipe is mainly focused on a portion where obstacles such as gravel or rock are located, or a part where the ground is vulnerable or where the residual moisture in the ground must be more securely protected and grouting of the reinforcing member 110. 120 may be provided.

As such, when the corrugated pipe 120 is provided only in a predetermined area, the corrugated pipe 120 needs only to be installed, so that the work becomes more convenient and the production cost can be reduced. .

Instead of the cover part 124 described above, a coupling tape (not shown) or the like may be used so that the through hole 123 is closed.

In this case, when the predetermined pressure is increased inside the corrugated pipe 120, the coupling tape has to be broken or peeled off in a torn shape such that the through hole 123 is opened.

According to the present invention grouting reinforcement unit and the grouting reinforcement method using the same, as described above, it is possible to further strengthen the attachment of the reinforcing member and the corrugated pipe by using the corrugated pipe, and further increases the adhesion force by increasing the friction between the corrugated pipe and the inner wall of the drilled hole. There is an effect that can be improved.

In addition, the grout pipe is provided with a plurality of through-holes to fill the grouting material on the outer side of the corrugated pipe first, and when the inner filling of the corrugated pipe is carried out together with the external filling of the corrugated pipe and the reinforcing filling, the overall strengthening of the grouting material Reinforcement work is effective.

As described above, the preferred embodiments of the present invention have been described, and the fact that the present invention can be embodied in other specific forms in addition to the above-described embodiments without departing from the spirit or scope thereof has ordinary skill in the art. It is obvious to them. Therefore, the above-described embodiments should be regarded as illustrative rather than restrictive, and thus, the present invention is not limited to the above description and may be modified within the scope of the appended claims and their equivalents.

1 is a cross-sectional view schematically showing a tunnel in which the grouting reinforcement method according to the prior art is implemented;

Figure 2 is an enlarged view for explaining how the grouting reinforcement method according to the prior art is implemented;

3 is a cross-sectional view showing a grouting reinforcing unit according to an embodiment of the present invention;

4 is an exploded perspective view of FIG. 3;

5 and 6 are perspective views showing a corrugated pipe provided with a cover portion;

7 is a flowchart showing a process of installing the present invention grouting reinforcement unit;

8 to 13 are views sequentially showing the process of installing the grouting reinforcement unit according to an embodiment of the present invention:

14 is a cross-sectional view showing a state in which the grouting reinforcement unit is installed according to another embodiment of the present invention;

<Description of the symbols for the main parts of the drawings>

100: grouting reinforcing unit 110: reinforcing member

112: central groove 114: section member

120: corrugated pipe 123: through hole

124: cover 130: anchor member

131: center groove 132: groove

177: fixed block 195: fixed piece

Claims (7)

In the reinforcing unit for grouting work using the drilled hole formed in the ground, Reinforcing members inserted into the drilling holes; A corrugated pipe inserted into the drilling hole in a form surrounding the outside of the reinforcing member and having a through hole formed to penetrate the inside / outside; A fixing block through which the reinforcing member penetrates and is installed at an inlet of the drilling hole; A plurality of section members formed at one end of the reinforcing member to bend outward when an external force is applied from the center to the outside; And A fixing piece inserted between the plurality of cutting members to maintain the reinforcing member fixed to the fixing block; Grouting reinforcement unit comprising a. The method of claim 1, Grouting reinforcement unit, characterized in that it further comprises an anchor member inserted into the corrugated pipe so that the reinforcing member is located in the center of the inner corrugated pipe. The method of claim 1, It is provided on the outer side of the corrugated pipe when the pressure inward from the outside of the corrugated pipe closes the through hole, and when pressed from the inner side of the corrugated pipe further comprises a cover to open the through hole. Grouting reinforcement unit. delete delete delete In the grouting reinforcement method performed using the grouting reinforcement unit according to any one of claims 1 to 3, Drilling a hole in the ground; Inserting the grouting reinforcement unit into the drilling hole; Injecting a grouting material into the perforation hole to the outside of the corrugated pipe of the grouting reinforcing unit; And Injecting the grouting material into the corrugated pipe of the grouting reinforcing unit by injecting the grouting material to assist the filling between the corrugated pipe and the perforation hole, which was not completely reinforced when the grouting material was injected into the corrugated pipe outside; Soil nailing reinforcement method using a grouting reinforcement unit comprising a.

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