KR101539031B1 - Pack-mounted Reinforcing Structure - Google Patents

Abstract

The present invention relates to a pack-mounted reinforcing structure which can be used as a soil-retaining temporary facility girder, a rectangular reinforcement unit, a base structure, etc., connect a pack, a reinforcement material, and an injection hose without creating a gap, and be simply connected to facilitate construction. The pack-mounted reinforcing structure according to the present invention is installed in a hole (H) drilled on the ground or a structure to act as a reinforcement means, and comprises: a reinforcement material in a bar shape; a pack formed from fabric and wherein an upper end thereof is open, and a lower portion of the reinforcement material is inserted thereinto to enclose the reinforcement material; a spacer inserted into the reinforcement material inside the pack to maintain a position of the reinforcement material in the drilled hole; an injection hose to inject grout into the pack; a holder wherein a reinforcement material insertion hole into which the reinforcement material is inserted and a hose insertion hole into which the injection hose is inserted are formed; and a binding member to press an upper end of the pack against an outer surface of the holder to bind the pack to the holder.

Description

Pack-mounted Reinforcing Structure [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing-type reinforcing structure that can be used as a supporting material for retaining earth retaining material, a slope reinforcing hole, a foundation structure, and the like in construction and civil engineering fields. More particularly, The present invention relates to a packing-type reinforcing structure that is coupled to a circular holder and inserted into the perforation hole, and grout is injected into the inside and outside of the pack to secure the reinforcing strength.

Generally, in the construction of natural slopes and artificial slopes adjacent to terraces, railways and roads, reinforcement of artificial slopes, reinforcement of ground reinforcement for retaining structures such as underground structures and tunnels, maintenance of retaining walls, and installation, ground reinforcement The construction method is applied, earth retaining works, earth anchoring and Soil Nailing method are mainly used.

The double soil nailing method is a method in which a nail as a reinforcing material is inserted together with a ground penetrating hole in an underground excavation of a sloping ground or a building, a grout is injected, and the reinforcing material is reinforced with a fixing plate. The frictional resistance of the nail pulling resistance and the grouting high- The ground can be supported independently by increasing the overall shear strength of the ground and by restraining the generated displacement by restraining the expected relaxation of the ground during excavation and completion of excavation by increasing the rigidity of the ground surface against the earth pressure acting on the inclined ground surface. .

This type of soil nailing method is a method of securing the stability of the ground and reinforcement (nail) with a single structure by reinforcing the nail as a reinforcing material at regular intervals. It is widely used when the form of soil or slope is complex, Currently, it is being applied in the field of construction work actively in foreign countries as well as domestic ones. Various applications are being actively made for studying and acquiring monopoly rights.

However, since the conventional soil nailing structure or method is a method of simply injecting grout only in the perforation hole formed in the ground, the grout does not provide sufficient pressure in the perforation hole, and thus the strength of the reinforcement is deteriorated.

Registration No. 10-0966148 (Registration date June 17, 2010) Registration Utility Model No. 20-0352267 (registered on May 25, 2004)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a method of installing a pack made of a fabric such as a nonwoven fabric in a lower portion of a reinforcing member inserted into a perforation hole of a ground, So that the pack is brought into intimate contact with the inner surface of the perforation hole with a strong pressure, thereby exhibiting a pressure grouting effect and increasing the compressive strength.

According to an aspect of the present invention, there is provided a packed-type reinforcing structure comprising: a bar-shaped stiffener; A pack made of a fabric having an open upper end and a lower end and covering the lower portion of the reinforcement; An upper holder having a reinforcing material insertion hole through which the reinforcing material is inserted and having an upper end fixed to an outer surface thereof; An upper binding member for binding the upper end of the pack to the outer circumferential surface of the upper holder while tightly bonding; A lower holder having a reinforcing and recombining groove for receiving a lower end of the reinforcing member and having a lower end fixed to an outer surface thereof; A lower binding member for binding the lower end of the pack to the outer periphery of the lower holder while tightly bonding; An inner injection hose that penetrates the upper holder and has a lower end disposed inside the pack to inject grout into the pack; An outer infusion hose that penetrates through the upper holder and the lower holder and has a lower end disposed outside the pack to inject grout to the outside of the pack; And an air discharge hose that penetrates through the upper holder and is disposed so that a lower end thereof is disposed inside the pack to guide the air inside the pack to be discharged to the outside of the pack.

According to the present invention, the upper end portion and the lower end portion of the pack made of a flexible fabric are connected to each other via a holder made of a high-strength rubber material through a reinforcing material and an injection hose to stably connect the upper end portion and the lower end portion thereof, .

Accordingly, the grout injected into the pack brings the pack into close contact with the inner surface of the perforation hole with a strong pressure, and at the same time, the grout injected to the outside of the pack enables the pressure grouting to be realized by pinching the gap between the perforation hole and the pack, An effect of greatly improving can be obtained.

1 is an exploded perspective view showing a configuration of a packed-type reinforcing structure according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing the pack-type reinforcing structure of FIG. 1 embedded in the ground; FIG.
3 is a partial cross-sectional view of the upper holder portion of the pack-type reinforcing structure of Fig. 1;
Fig. 4 is a sectional view showing the main portion of the lower holder portion of the pack-type reinforcing structure of Fig. 1;
5A and 5B are cross-sectional views of main parts of a packed-in-type reinforcing structure according to another embodiment of the present invention.
6 is a cross-sectional view of a packed reinforcing structure according to another embodiment of the present invention.
7 is a cross-sectional view of a packed reinforced structure according to another embodiment of the present invention.
8 is a cross-sectional view of the main portion of the packed-in-type reinforcing structure of Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, preferred embodiments of a packed type reinforcing structure according to the present invention will be described in detail with reference to the accompanying drawings.

The pack-type reinforcing structure according to the present invention is a structure that is buried in the perforation hole (H) which is drilled in the ground or a construction / civil engineering structure to reinforce the structure. 1 to 4 illustrate a reinforcing structure for a soil nailing method according to an embodiment of the pack-type reinforcing structure according to the present invention.

1 to 4, a packed type reinforcing structure according to an embodiment of the present invention includes a rod-type stiffener 10, a fabric having an open upper end and a lower end, A plurality of spacers 30 which are inserted into the reinforcing member 10 from the inside of the pack 20 and maintain the position of the reinforcing member 10 inside the perforation hole H, And an upper end of the pack 20 is fixed to an outer circumferential surface of the upper holder 50. The upper holder 50 is formed to penetrate through the reinforcing material insertion hole 51, And a lower holder 70 on which a lower end of the pack 20 is fixed is formed on the outer surface of the lower holder 70. The lower holder 70 is fixed to the upper holder 60, And a lower end of the pack 20 is engaged with the outer peripheral surface of the lower holder 70 An inner injection hose 41 penetrating the upper holder 50 and having a lower end disposed inside the pack 20 to inject the grout into the pack 20; An outer injection hose 42 which penetrates the upper holder 50 and the lower holder 70 so that the lower end thereof is disposed outside the pack 20 and injects the grout to the outside of the pack 20, And an air discharge hose 43 installed at the lower end of the pack 20 to guide the air inside the pack 20 to the outside of the pack 20.

In the soil nailing method, a reinforcing bar is used as the reinforcing material 10, but a PC stand or a steel bar may be used as the reinforcing material 10 when applied to other methods. A plurality of spacers (30) are fitted to the front end of the fixing portion of the stiffener (10) so that the position and shape of the stiffener (10) can be maintained inside the perforation hole (H). The spacers 30 can be formed using known spacers and typically have a hole through which the stiffener 10 is inserted and a plurality of support pieces extending radially outward of the hole .

The pack 20 is made of a fabric such as a nonwoven fabric and is installed to surround a part or all of the stiffener 10 from the lower end of the stiffener 10. [

Grouting such as cement milk or mortar is injected into the pack 20 through the inner injection hose 41. The pack 20 is expanded by the grout to form the perforation hole H, And is reinforced by being pressurized and adhered to the inner surface.

The outer injection hose 42 is installed so as to pass through the upper holder 50 and the lower holder 70 in order so that the outer surface of the expanded pack 20 and the perforation hole H) function to increase the pressure by covering the gap between the inner surfaces. In other words, when the perforation hole H is perforated, the inner surface of the perforation hole H does not form a smooth surface, and the surface of the perforation hole H often flows down or becomes a rugged surface due to a puncture mark or the like. Therefore, when the pack 20 is inflated by injecting the grout into the pack 20 with only the inner injection hose 41, there is a possibility that a gap or space is generated between the pack 20 and the inner surface of the perforation hole H In the present invention, grout is injected to the outside of the pack 20 through the external injection hose 42 to fill the gap between the expanded pack 20 and the inner surface of the perforation hole H, thereby minimizing the pressure loss .

The upper holder 50 is formed in a disc shape having a diameter smaller than the inner diameter of the perforation hole H and has a stiffener insertion hole 51 through which the stiffener 10 is inserted, A first hose insertion hole 52a into which the internal injection hose 41 is inserted at a position spaced a predetermined distance from the first hose insertion hole 51 and a second hose insertion hole 52b into which the external injection hose 42 is inserted, And a third hose insertion hole 52c through which the air discharge hose 43 is inserted is formed.

The upper holder 50 is made of a resin material such as high-strength rubber and acts to support the reinforcing member 10, the injection hose 41 and the upper end of the pack 20 together. A coupling groove 53 to which the upper coupling member 60 is coupled is formed on the outer surface of the upper holder 50 so as to be concave along the circumferential direction. When the upper binding member 60 is fastened to the outer surface of the upper holder 50 and the upper end of the pack 20 is fastened to the outer surface of the upper holder 50, It is possible to prevent the member 60 from being detached from the upper holder 50 due to the grout pressure.

The upper holder 50 may have a uniform diameter as a whole, but may have a diameter different from that of the upper portion.

The upper binding member 60 is a component that acts to firmly fasten the upper end of the pack 20 to the outer surface of the upper holder 50. A plurality of fastening holes 61 are formed at regular intervals along the longitudinal direction A ring-shaped metal clamp band or a known tie band which can be tightened and loosened to an arbitrary diameter can be applied.

The lower holder 70 is made of a resin material such as high strength rubber as in the upper holder 50. The reinforcing and recombining groove 71 is formed at the center of the lower holder 70 by being inserted into the lower end of the reinforcing material 10, Hole 72 through which the lower end of the outer injection hose 42 penetrates is formed outside the reinforcement and recombination groove 71 so as to penetrate in the vertical direction.

As described above, the lower holder 70 serves to bind and support the outer injection hose 41 and the lower end of the pack 20 together. A binding groove 73 is formed in the outer surface of the lower holder 70 along the circumferential direction to prevent the lower binding member 80 from coming off.

The upper portion of the lower holder 70 is formed in a disc shape, and the lower portion of the lower holder 70 is formed into a conical shape with a downward point. When the lower portion of the lower holder 70 is formed in a conical shape, when the lower holder 70 is inserted into the perforation hole H, the lower holder 70 can be smoothly inserted into the perforation hole H .

The lower binding member 80 is a component that acts to firmly bind the lower end of the pack 20 to the outer surface of the lower holder 70 and has the same or similar structure as the upper binding member 60 described above.

The packing-type reinforcing structure constructed as described above is constructed as follows.

First, the hole (H) is drilled in the ground or civil engineering / construction structure using a rock drill or boring machine, and a pack-type reinforcing structure is assembled outside the perforation hole (H). The pack mounting type reinforcing structure is assembled by inserting the spacing member 30 into the reinforcing member 10 and inserting the lower end portion of the reinforcing member 10 into the reinforcing and recombining groove 71 of the lower holder 70, The upper holder 50 and the lower holder 70 are inserted into the upper holder 50 and the lower holder 70 so that the inner injection hose 41, the outer injection hose 41 and the air discharge hose 43 are inserted into the upper holder 50 and / Next, the upper and lower ends of the pack 20 are bound to the upper holder 50 and the lower holder 70 using the upper binding member 60 and the lower binding member 80, respectively.

Of course, the order of assembling the pack-type reinforcing structure is not limited to the above-described order. For example, in the above-described embodiment, the inner injection hose 41 and the air discharge hose 43 are first inserted into the upper holder 50, and the pack 20 is bound to the upper holder 50 and the lower holder 70 The pack 20 may be first bound to the upper holder 50 and the lower holder 70 and then the inner injection hose 41 and the air discharge hose 43 may be installed in the upper holder 50 will be.

When the pack-type reinforcing structure is assembled as described above, the pack-type reinforcing structure is inserted into the perforation hole H, grout is injected through the inner injection hose 41 to inflate the pack 20, And is fixed while applying pressure from the inside of the perforation hole (H). At this time, the air inside the pack 20 is discharged to the outside through the air discharge hose 43, so that the grout is smoothly filled in the pack 20.

The grout is injected through the external injection hose 42 and the grout is discharged through the outer side of the lower end of the lower holder 70 to fill the outer side of the pack 20 with grout.

The pack 20 is tightly fixed to the outer surface of the upper holder 50 when the packing type reinforcing structure is installed by injecting the grout into the inside and the outside of the pack 20 and the reinforcing member 10 and the inner injection hose 41 and the external injection hose 42 are inserted and supported in the stiffener insertion hole 51 and the hose insertion holes 51, 52a, 52b of the upper holder 50 so that the grout leaks to the outside of the upper holder 50 So that the phenomenon hardly occurs.

When there is a gap between the reinforcement material insertion hole 51 and the reinforcing material 10 of the upper holder 50 and between the hose insertion holes 52a and 52b and the inner injection hose 41 and the outer injection hose 42, 5a and 5b, the reinforcement member insertion hole 51 and the first to third hose insertion holes 52a, 52b, 52c of the upper holder 50, The inner injection hose 41 and the outer injection hose 42 are inserted into the outer peripheral edge of the lower end portion of each of the reinforcing member 10 and the outer injection hose 42 while being bent at the time of inserting the reinforcing member 10, It is preferable to form the sealing skirt 54 which is in close contact with the inner circumferential surface of the outer circumferential surface of the outer circumferential surface of the outer circumferential surface of the outer circumferential surface.

The upper and lower ends of the pack 20 are connected to the upper holder 50 and the lower holder 50 of the high strength rubber material together with the reinforcing member 10, the inner injection hose 41 and the outer injection hose 42, 70 so that they can be stably supported and bonded without generating a gap. Therefore, the grout is injected into the pack 20 to generate a high pressure inside the pack 20, so that the grout is prevented from leaking unnecessarily, so that the reinforcing action can be performed with sufficient pressure, and the workability can be improved. Can be obtained.

In this embodiment, the air discharge hose 43 is provided so as to communicate with the inside of the pack 20 so that the air inside the pack 20 is discharged to the outside through the air discharge hose 43 when the grout is injected. However, Alternatively, the air discharge hose 43 may be omitted.

6 is a perspective view illustrating a packed reinforced structure according to another embodiment of the present invention. The packed reinforced structure of the present embodiment includes an upper holder 50 coupled to the stiffener 10, A holder 92 for holding the upper end of the urethane filling pack 91 and a holder 92 for holding the urethane filling pack 91 through the holder 92 for filling the upper end of the urethane filling pack 91, And a urethane injection hose 94 for injecting foamed urethane into the inside of the urethane injection hose 91.

The upper end of the urethane filling pack 91 is fixed to the outer surface of the filling pack holder 92 by a binding member 93 and the lower end of the urethane filling bag 91 is fixed to the upper holder 50 And packed together with the pack 20 to be fixed. That is, in this embodiment, the upper holder 50 serves to bind and connect the upper urethane filling pack 91 and the lower pack 20 at the same time. The structure of the holder 92 for the filling pack is almost the same as that of the upper holder 50 of the first or second embodiment described above. However, there is a difference in that the filling pack holder 92 is further provided with a hose insertion hole for injecting urethane.

The inner injection hose 41 and the outer injection hose 42 for injecting grout into and out of the pack 20 are sequentially installed through the holder 92 and the holder 50. The air discharge hose 43 is also installed through the holder 92 and the holder 50 in order.

The packed type reinforcing structure according to this embodiment is constructed as follows.

The perforation hole H is formed in the ground or structure in the same manner as in the above embodiment, the pack-type reinforcing structure is assembled, and then the pack-type reinforcing structure is inserted into the perforation hole H.

Then, the foamed urethane chemical liquid is injected into the space between the holder 92 for the filling pack and the upper holder 50 through the urethane injection hose 94. At this time, since the foaming urethane chemical liquid has a very high gelation rate, when the foaming agent is injected for a few minutes after the chemical liquid is injected, the foamed urethane chemical liquid becomes a gel state and bulky expansion occurs, thereby expanding the urethane filling bag 91 made of a non- And is closely adhered to the inner peripheral surface of the perforation hole (H).

Subsequently, when grouting such as cement milk is injected through the inner injection hose 41, the grout is filled in the lower pack 20, and the pack 20 is fixed to the lower side of the perforation hole H And is tightly adhered to the inner surface. Then, the grout is injected through the external injection hose 42 to fill the gap with the outside of the pack 20.

When urethane is filled in the urethane filling pack 91 on the upper side of the pack 20 and the volume is expanded, the pressure is transferred to the lower pack 20 to complete the grouting into the pack 20 at once, There is an advantage that this can be done.

That is, in the case of the pack-type reinforcing structure of the first embodiment described above, it takes a lot of time to grout 3 to 6 grooves repeatedly to prevent shrinkage when the grout is injected into the pack 20. However, The pressure grouting can be performed by a simple construction and operation, and the time required for grouting can be greatly shortened.

7 and 8 show another embodiment of the pack-type reinforcing structure according to the present invention. The pack-type reinforcing structure of this embodiment has the same configuration as the pack-type reinforcing structure of the first embodiment described above. However, the pack-type reinforcing structure of this embodiment differs from the pack-type reinforcing structure in that a plurality of discharge holes 45 are arranged at intervals in the longitudinal direction in the inner injection hose 41 for injecting grout into the pack 20.

8, the inner injection hose 41 is formed with a plurality of discharge holes 45, so that even if expansion of the pack 20 is limited due to the collapse of the ground in the perforation hole H as shown in FIG. 8, The grout is discharged through the plurality of discharge holes 45 formed in the hose 41 so that the grout can be filled all over the pack 20 so that the grout can be completely filled in the pack 20 without forming grout- So that uniform pressure grouting can be realized.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is clear that the present invention can be suitably modified and applied in the same manner. Therefore, the above description does not limit the scope of the present invention, which is defined by the limitations of the following claims.

H: hole (perforation hole) 10: stiffener
20: Pack 30:
41: inner injection hose 42: outer injection hose
43: air discharge hose 50: upper holder
51: reinforcement material insertion hole 52a, 52b, 52c: hose insertion hole
60: upper binding member 61: fastening hole
70: Lower holder 71: Reinforced opening engaging groove
72: Hose through hole 80: Lower binding member
91: Urethane packing pack 92: Holder for charging pack
93: binding member 94: urethane injection hose

Claims (10)

1. A pack-type reinforcing structure buried in a hole (H) formed in a ground or a structure to be reinforced,
A rod-shaped stiffener 10;
A pack (20) made of a fabric having an upper end and a lower end opened and covering the lower portion of the reinforcing member (10);
An upper holder 50 having a reinforcing member insertion hole 51 through which the reinforcing member 10 is inserted and having an upper end fixed to the outer surface of the upper holder 50;
An upper binding member 60 that binds the upper end of the pack 20 while closely contacting the upper end of the pack 20 to the outer periphery of the upper holder 50;
And a lower end of the pack 20 is fixed to the outer surface of the reinforcing and recombining groove 71. The lower portion of the lower holder 70 is formed into a conical shape )Wow;
A lower binding member 80 binding the lower end of the pack 20 to the outer circumferential surface of the lower holder 70 while being in tight contact therewith;
An inner injection hose 41 penetrating through the upper holder 50 and disposed at a lower end inside the pack 20 to inject grout into the pack 20;
And an external injection hose 42 penetrating through the upper holder 50 and the lower holder 70 and disposed at the lower end of the pack 20 to inject grout to the outside of the pack 20,
A plurality of discharge holes 45 are arranged at intervals in the longitudinal direction of the inner injection hose 41,
Wherein the external injection hose is installed to penetrate from the upper portion of the lower holder to the lower portion so as to inject grout from the lower portion of the lower holder. The air conditioner according to claim 1, further comprising: an air discharge hose (43) provided to guide the air inside the pack (20) to the outside of the pack (20) ). ≪ / RTI > delete The packed type reinforcing structure according to claim 1, wherein the upper holder (50) and the lower holder (70) are made of a resin material. The upper binding member (60) and the lower binding member (80) according to claim 1, wherein the upper binding member (60) and the lower binding member (80) have a plurality of fastening holes (61) formed along the longitudinal direction at predetermined intervals, And a clamp band. The binding apparatus according to claim 1, wherein the binding grooves (53, 73) to which the upper binding member (60) and the lower binding member (80) are coupled are formed on the outer surfaces of the upper holder (50) Wherein the reinforcing member is formed to be concave. The hose according to claim 2, wherein a plurality of hose inserting holes (51) for inserting the reinforcing material insertion hole (51) of the upper holder (50), the inner injection hose (41), the outer injection hose When the reinforcing member 10 and the inner injection hose 41, the outer injection hose 42 and the air discharge hose 43 are inserted into the outer peripheral edge portions of the lower end portions of the holes 52a, 52b and 52c, Characterized in that a sealing skirt (54) which is in close contact with the outer surfaces of the inner injection hose (41), the outer injection hose (42) and the air discharge hose (43) is formed radially inwardly. The Urethane charging pack (91) according to claim 2, further comprising a urethane filling bag (91) which is bundled with the upper end of the pack (20) and injects foamed urethane into the upper side of the upper holder (50);
A holder 92 for a filling pack which is fitted on the upper side of the upper holder 50 and is fitted to the reinforcing member 10 to bind the upper end of the urethane filling pack 91;
Further comprising a urethane injection hose (94) for passing foamed urethane through the filler pack holder (92) into the urethane filling pack (91);
Wherein the inner injection hose 41 and the air discharge hose 43 are arranged inside the pack 20 through the holder 92 for the filling pack and the upper holder 50 in order. delete The pack according to claim 1, further comprising a spacer (30) inserted into the reinforcing member (10) inside the pack (20) to maintain the position of the stiffener (10) Mounted type reinforcement structure.

Images