WO2016064018A1

WO2016064018A1 - Method for using strip type fiber-reinforced material as soil nail structure

Info

Publication number: WO2016064018A1
Application number: PCT/KR2014/010890
Authority: WO
Inventors: 이정수
Original assignee: 주식회사 한포스
Priority date: 2014-10-22
Filing date: 2014-11-13
Publication date: 2016-04-28

Abstract

The present invention relates to a method for using a strip type fiber-reinforced material as a soil nail structure, in which a strip type fiber-reinforced material, which is a flexible material, is used as a soil nail structure used for the reinforcement of a slope and the reinforcement of various kinds of ground so as to promote cost reduction and constructability improvement. According to one embodiment, a strip type fiber-reinforced material (110) is inserted into the bored hole (H) of the ground in a state in which a ring (120) is formed by folding the strip type fiber-reinforced material (110) of a predetermined length along the longitudinal direction thereof and folding one end of the strip type fiber-reinforced material in the width direction thereof, and then grout (140) is filled in the bored hole so as to be cured. The strip type fiber-reinforced material (110) is relatively cheap compared with existing deformed bars or other soil nail materials, easy to be transported and handled, easy to be inserted when being inserted into the bored hole since the strip type fiber-reinforced material can be inserted in a straightly extended state by being folded in the longitudinal direction, and can increase resistance force even though the depth of the bored hole is not deep since the ring formed at the rear end exhibits passive resistance force in the state of being inserted into the bored hole, thereby enabling stable support of the slope, the wall surface and the like.

Description

How to use strip-shaped fiber reinforcement as a sawn nail structure

The present invention is to use the nail-shaped fiber reinforcement of the flexible material for the saw nail structure used for the reinforcement of various grounds such as slope reinforcement and excavation surface, the nail to shoot the strip-shaped fiber reinforcement to reduce the construction cost and improve construction and stability It relates to a method used as a structure.

In general, the saw nailing or rock bolting method forms perforations by drilling a slope or excavation surface that requires reinforcement, and inserts a reinforcing bar or round bar or steel pipe or steel wire or bolt of a predetermined length and thickness into the drilling hole. After that, the remaining space is filled with grout to harden, and the opening of the drilling hole is blocked with a pressure plate.

On the other hand, in the above-described saw nailing method, it is not economical to use reinforcing bars, round bars, steel pipes, or steel wires as reinforcing materials, and these materials are generally straight and rigid. Insertion into the hole is not easy, which leads to an increase in logistics costs, as well as inconvenient work, resulting in poor workability. In order to achieve the required support force, the drilling hole is required to exhibit the required support force. Since the depth had to be drilled quite deeply, it would increase the overall construction cost and delay the construction period.

In order to solve such a problem, in patent document 1 and patent document 2, it is proposed to use geotextile as a reinforcement material.

In Patent Literature 1, a ground anchor for supporting a wall surface formed by excavation is disclosed, which includes a tension member having a plurality of carbon fibers as a wick and coated with a resin on the outside; An anchor body coupled to one end of the tension member and inserted into an anchor hole that penetrates through a wall and is fixed to the anchor hole by hardening of a grout filled in the anchor hole; And an anchor head coupled to the other end of the tension member, the anchor head being supported on the support wall such that the carbon fiber of the tension member is tensioned so that a tensile force is applied to the support wall installed on the wall surface.

Patent Literature 2 discloses a strip-shaped geotextile reinforcement member, a pressure plate fitted to the head of the reinforcement member and fixed to a slope where the perforation hole is formed, and the reinforcement member to be disposed at the center of the perforation hole, and having a spacer coupled to the reinforcement material. Soil nail structure is provided for use in the soil nailing method is disclosed.

[Preceding technical literature]

[Patent Documents]

(Patent Document 1) Korean Laid-Open Patent Publication No. 10-2010-0094248 (published Aug. 26, 2010) Name of Invention: Ground Anchor

(Patent Document 2) Korean Registered Patent Publication No. 10-1447021 (registered on September 26, 2014) Name of invention: Soil nail structure and slope reinforcement method using the same

The present invention has been made to solve the above problems, an object of the present invention is to provide a binding force to the grout in the use of a band-shaped fiber reinforcement of a relatively flexible material as a sawn nail structure compared to the conventional release reinforcement or steel pipe or steel wire It is possible to exert effective supporting power without using this excellent and ancillary materials, thereby economical construction is possible, and the construction method is simple, so that even a skilled worker can do the construction quickly, and the transportation of materials required for construction and The present invention also provides a method of using a strip-shaped fiber reinforcement as a nailing structure to be used for various purposes such as slope reinforcement, retaining wall support, tunnel reinforcement, reinforcement earth retaining wall reinforcement (repair), and the like.

In one embodiment of the present invention to achieve the above object in a state in which the belt-shaped fiber reinforcement of a predetermined length is folded in the longitudinal direction, at least one of the front end or the rear end of the belt-shaped fiber reinforcement in the width direction formed in a ring shape After inserting into the drilled hole of the ground, the present invention provides a method of using a strip-shaped fiber reinforcement for filling the grout in the drilled hole as a sawn nail structure.

In another embodiment of the present invention, after folding the strip-shaped fiber reinforcement material having a predetermined length along the longitudinal direction, folding the rear end of the strip-shaped fiber reinforcement material in the width direction, inserting it into the boring hole of the ground, and then grouting the boring. The present invention provides a method of using a band-shaped fiber stiffener as a sawn nail structure to harden by filling in a hole and continuously connecting the band-shaped fiber stiffener to an adjacent drilled hole.

In the present invention, the strip-shaped fiber reinforcement is not limited to folding once (half width) or folding twice (half width) along the longitudinal direction, but folded to completely overlap or maintain a predetermined angle. It can be folded in various ways, and the folding method and shape can be changed in various ways. Also, an auxiliary tool and a strip-shaped fiber reinforcement are inserted into the perforation hole to maintain the folded state or maintain a predetermined angle so as to be completely folded. In one state, a spacer or the like for additionally allowing the strip-shaped fiber reinforcement to be located at the center of the perforation hole may be additionally used.

According to the embodiments of the present invention, since the band-shaped fiber reinforcement is folded along the longitudinal direction and inserted into the drilled hole, the flexible reinforcement is not bent but is in a straight stretched state, that is, the rigidity is reduced and the overall thickness (or width) is reduced. Easy insertion into the drilled hole, but excellent bonding force with the grout, and in one embodiment the tip of the reinforcement is inserted into the drilled hole to form a ring so that this part acts as a passive resistor during curing after filling the grout It is possible to improve the bearing capacity, and when the ring is formed in the part exposed to the outside of the drilling hole, the connecting member for fixing the pressure plate or supporting the wall can be directly connected to the ring without using a separate subsidiary material. The construction cost can be reduced quickly and easily. Since the band-like fiber reinforcement, which is the main material in the market, is rolled, it is easier to transport and handle than existing metal reinforcement materials, and the cost is low, thus reducing the overall construction cost.

1 is a perspective view of a nail nail structure according to a first embodiment of the present invention,

Figure 2 is a perspective view of the folded belt-like fiber reinforcement constituting the saw nail structure shown in Figure 1,

Figure 3 is an enlarged view of the ring portion of the saw nail tip shown in Figure 1,

4 is a cross-sectional view showing a state in which the saw nail structure shown in Figure 1 is inserted into the drilling hole,

5 is a plan view of the saw nail structure according to the second embodiment of the present invention, the state inserted into the drilling hole,

Figure 6 is a plan view of the saw nail structure according to the third embodiment of the present invention, inserted into the drilling hole.

7 is a plan view of the saw nail structure according to the fourth embodiment of the present invention, inserted into the drilling hole.

8 is a plan view showing a construction state of the saw nail structure according to the fifth embodiment of the present invention.

Figure 9 is a saw nail structure of the first embodiment showing a state in which a separate holding interval.

FIG. 10 is an enlarged view of a portion of the sawed nail structure shown in FIG. 9; FIG.

FIG. 11 is a perspective view of an inverted state of the nail nail structure of FIG. 10. FIG.

Figure 12 is a cross-sectional view of the construction of the saw nail nail structure of the present invention for slope reinforcement.

FIG. 13 is an enlarged cross-sectional view of the saw nail structure shown in FIG. 12. FIG.

14 is a perspective view showing the connection state of the saw nail structure and the retaining wall of the present invention during the construction of the panel retaining wall close to the slope.

FIG. 15 is a side sectional view showing the state of FIG. 14; FIG.

FIG. 16 is an enlarged cross-sectional view illustrating a connection state of the soil nail structure and the retaining wall panel illustrated in FIG. 14.

Figure 17 is a perspective view showing a state that the saw nail of the present invention used for reinforcement and slope greening of cut slopes.

18 is a side sectional view showing the state of FIG. 17;

19 is an enlarged view illustrating main parts of FIG. 18;

20 is a perspective view showing the connection state of the saw nail structure and the retaining wall of the present invention when the construction of the block-shaped retaining wall close to the slope;

21 is an enlarged view illustrating main parts of FIG. 20;

Figure 22 is a front sectional view showing a state using the saw nail of the present invention as a retaining wall for the basement building.

Figure 23 is a front sectional view showing a state using the saw nail of the present invention as a tunnel section support material.

FIG. 24 is an enlarged cross-sectional view of an example of the saw nail illustrated in FIG. 23. FIG.

25 is an enlarged cross-sectional view of another example of the saw nail illustrated in FIG. 23.

Figure 26 is a side cross-sectional view showing a state in which the saw nail of the present invention is applied to the reinforcement and repair of the existing reinforced earth retaining wall.

27 is a plan sectional view showing the state of FIG.

Hereinafter, with reference to the accompanying drawings, preferred embodiments that do not limit the present invention will be described in detail.

1 to 4 illustrate a saw nail structure and a construction state thereof according to a first embodiment of the present invention, the saw nail structure 100 according to the present embodiment has a length of a strip-shaped fiber reinforcement 110 of a predetermined length Fold in half width along the direction, fold about half of the length of the strip-shaped fiber reinforcement 10 in the width direction, and insert the grout 140 into the boring hole H of the ground in a state where the ring 120 is formed. The band-shaped fiber reinforcement 110 is integrally formed with the grout 140 so as to be hardened by filling the perforation hole H to exert a bearing force (draw resistance).

Although not shown in the drawings, in order to maintain one end of the strip-shaped fiber reinforcement 110 in a ring shape, an adhesive tape or a clip-shaped binding member may be used. It can also be used additionally for shape maintenance and smooth insertion.

In the present embodiment, there is no hook at the front end inserted into the drilling hole H, and the connecting ring 120 is formed only at the rear end, that is, the portion exposed to the outside, which is a strip-shaped fiber reinforcement material having a predetermined length, that is, the drilling hole H ) Fold the band-shaped fiber reinforcement having a length of about twice the length to form two strands to form a connecting ring 120 at the rear end, but in the present invention, the nail nail structure of the embodiment shown in FIGS. If necessary, on the contrary, that is, the ring 120 may be disposed inside the drilling hole H and may be installed without the ring at the inlet side of the drilling hole H.

In this embodiment, the strip-shaped fiber reinforcement 110 is preferably used to use a reinforcing material formed with a folding groove 112 along the longitudinal direction, as shown in Figure 2, the present invention is not limited to this folding groove 112 General civil band-shaped fiber reinforcement without a) can also be used to fold in any width along the longitudinal direction, of course, the folding groove 112 is also not limited to the case where only one line formed in the center as shown in FIG. Of course, it is also possible to use a plurality formed at intervals that evenly divide the width of the strip-shaped fiber reinforcement.

As shown in FIG. 2, the strip-shaped fiber reinforcement 110 used in the present embodiment includes a plurality of wicks 111 made of a long fiber bundle such as polyester, and an outer portion of the plurality of wicks 111. It is made of a cover material 113 made of synthetic resin, such as polyethylene to be coated, the folding groove 112 is formed along the longitudinal direction in the middle portion.

The strip-shaped fiber reinforcement 110 as shown in Figure 2 is continuously extruded several hundred meters at the factory, and rolled in a rolled state (roll) is easy to transport to the construction site, the length required in the construction site It is possible to reduce the logistics cost, as well as easy to handle because it is used by cutting.

In addition, the band-shaped fiber reinforcement 110 used in the present invention has the flexibility to be easily bent in the unfolded state, but when cut to the length required in the construction site, and folded in a width of half to 1/4 along the longitudinal direction Since the straight state is maintained in a straight state can be easily inserted into the drilling hole (H) has the advantage that can be installed without a separate auxiliary insertion tool.

Such a method is conceived for using a flexible band-shaped fiber reinforcement for civil engineering as a sawing nail, that is, an anchor having rigidity. In the present invention, the band-shaped fiber reinforcement 110 is described above to maintain a folded state along a longitudinal direction. As it is wound using a binding member such as adhesive tape or clip form, it is possible to maintain the folded state stably, as well as to maintain the shape of the ring 120 formed at one end.

As shown in the figure, the nail nail structure 100 according to the present embodiment does not use a separate connection member because the rear ring 120 serves as a connection ring with various front members such as walls or panels. The direct connection is possible without the need for a separate subsidiary material for the connection between the saw nail and the reinforcement or wall.

In addition, the ring 120 has the advantage of ease of construction, as well as ease the stress concentration of the connection because there is fluidity and flexibility in the up, down, left and right when connected to the front member.

1 to 4, the saw nail structure 100 of the first embodiment is to maintain a predetermined angle (20 ~ 60 °) without being completely folded when the belt-shaped fiber reinforcement 110 is folded along the longitudinal direction, This is advantageous to improve the rigidity of the strip-shaped fiber reinforcement 110, as well as the surface area for coupling with the grout 140 is reduced completely, but the original surface area of the strip-shaped fiber reinforcement 110 is maintained as it is at a predetermined angle This is because there is an advantage. Therefore, when folding while maintaining the surface area of the strip-shaped fiber reinforcement 110, it is possible to maximize the bonding strength with the grout (140) filled in the drilling hole (H) can be reinforced pull-out resistance.

In fact, when the belt-shaped fiber reinforcement 110 is folded along the longitudinal direction, it is also possible to fold so as to completely overlap if necessary, but it is preferable to maintain the open state at a predetermined angle, in the drawings for the following embodiments Although the strip-shaped fiber reinforcement is shown in a completely overlapped state, but this is just for convenience of work (() and should not be construed as limiting the scope of the present invention.

5 is a saw nail structure according to a second embodiment of the present invention, which is a plurality of rings 120 are formed at the front end of the strip-shaped fiber reinforcement 110 is inserted into the drilling hole (H), A single ring 120 is formed at the rear end of the bar, which is folded into a M-shaped band-shaped fiber reinforcement of a predetermined length (about 3 to 4 times the depth of a drilling hole) so that two rings 120 are formed at the front end thereof. One ring is formed at the rear end, and if necessary, a ring shape is maintained by using a binding member on the rear side of the ring 120, and the binding member is also formed on the side of the front end of the ring 120. 130) to maintain the ring shape is to bind the two to four band-shaped fiber reinforcement 110 in a bundle.

On the other hand, in the present embodiment, the strip-shaped fiber reinforcement 110 is folded in a half-width state along the longitudinal direction by folding in an M shape to maintain a straight stretched state stably, without using a separate auxiliary insertion tool Can be easily inserted into

6 is a saw nail structure 100 according to the third embodiment of the present invention, which is the end of the strip-shaped fiber reinforcement 110, that is, the end inserted into the drilling hole (H), as well as the outside of the drilling hole In other words, a portion 120, that is, the rear end of the ring 120 having the same shape as the front end is formed, and the ring 120 of the front end inserted into the drilling hole H serves as a passive resistor, and the rear end of the loop 120 ) Will serve as a link.

On the other hand, the ring 120 of the front end of the strip-shaped fiber reinforcement 110, but not shown in the drawings, if the passive resistor made using a material such as synthetic resin, concrete, or metal is equipped with a passive resistance force added to the ring-type passive resistance force This exertion can shorten the length of the strip-shaped fiber reinforcement 110, as well as has the advantage that can be strengthened the bearing capacity.

In the present embodiment, the strip-shaped fiber reinforcement 110 is generally cut to about three times the length of the drilling hole (H) to fold 1/3 and 2/3 of the full length in the width direction over the entire length Three strands are overlapped as a whole, but the present invention is not limited thereto, and a portion extending from the front and rear ring portions may be shorter as in the embodiment shown in FIG. 5.

7 is a saw nail structure according to a fourth embodiment of the present invention, which is the reverse form of the embodiment shown in Figure 5, that is, the tip of the strip-shaped fiber reinforcement 110 is inserted into the drilling hole (H) One ring 120 is formed therein, and two rings 120 are formed at the rear end exposed to the outside, which is a strip-shaped fiber reinforcement 110 having a predetermined length (about 3 to 4 times the depth of a drilling hole). ) To form one ring 120 at the front end and two rings 120 at the rear end and to form a binding member (not shown) at the rear side of the ring 120 portion. It is to be used to maintain the ring shape, while using the binding member to the side of the ring 120 portion of the tip to keep the ring shape is to bind the two to four band-like fiber reinforcement 110 in a bundle.

8 is a saw nail structure according to the fifth embodiment of the present invention, which is a continuous installation of a strip of fiber-like reinforcement 110 in the adjacent hole (H), a strip of fiber of a predetermined length The reinforcing material is folded in half to 1/4 width along the longitudinal direction, and the rear end is folded in the width direction according to the length of the perforation hole and inserted into the perforation hole of the ground, and the grout is inserted into the perforation hole. It is to be filled, but the belt-shaped fiber reinforcement is to be continuously connected to the adjacent drilling holes.

In the present embodiment, when the strip-shaped fiber reinforcement 110 exposed to the outside of the drilling hole (H) is relatively loosely installed, the wall and another strip-shaped fiber reinforcing material installed in front of the portion can be directly connected, and the drilling hole (H) When the band-shaped fiber reinforcement exposed to the outside is in close contact with the exposed slope, the band-shaped fiber reinforcement exposed to the outside acts as a kind of pressure plate may simplify the slope reinforcement work.

The present invention is not limited to the embodiment shown in FIGS. 1 to 8, and based on the saw nail structure described and shown in these embodiments, various modifications, for example, the number of times or the folding angle along the longitudinal direction ( It is obvious that it is within the scope of the present invention to be described below to vary the folding, or right angle or acute angle folding, etc.), the shape of the line and the rear end, the selection of the binding member, and the binding position.

On the other hand, the strip-shaped fiber reinforcement 110 is preferably maintained in the open state at a predetermined angle than when fully folded in the state of being inserted into the drilling hole to maximize the area in contact with the grout to improve the friction force. .

9 to 11 show the stripped fiber reinforcement 110 in the lengthwise and width directions of the saw nail structure 100 of the first embodiment shown in FIGS. The state in which the spacers 130 are coupled to allow the fiber reinforcement to be located at the center of the drilled hole is shown.

The spacer 130 is made of a synthetic resin, consisting of a large diameter portion 132 formed in a radially cut shape, and a small diameter portion 134 formed before and after the large diameter portion 132, the large diameter portion ( 132 is elastic, so that it is easy to insert into the drilled hole H in a state where it is mounted on the strip-shaped fiber reinforcement 110, and the strip-shaped fiber reinforcement 110 contacts the inner circumferential surface of the drilled hole H so that the strip-shaped fiber reinforcement 110 is approximately the center of the drilled hole. The small diameter portion 134 serves to fix the spacer 130 to the outside of the band-shaped fiber stiffener 110 and to stably maintain the folded state of the band-shaped fiber stiffener 110 in the longitudinal direction. It will play a role to make it possible.

The spacer 130 is formed in the form of upper and lower separators can be fixed by winding a separate binding member (not shown) such as a cable tie or wire to the outside of the small diameter portion 134 or separate the upper and lower parts. The sieves may be integrally coupled to each other by an elastic coupling method such as a hook, and the spacer 130 is spaced at regular intervals over the entire length of the strip-shaped fiber reinforcement 110 to install the strip-shaped fiber reinforcement 110 in a closed state. The state to be unfolded and balanced to maintain a straight stretched state can be stably maintained, and the grout flows into the inside of the hole through the gap between the spacers 130.

12 and 13 illustrate a state in which the saw nail structure (the embodiment shown in FIGS. 9 to 11) of the present invention is constructed for slope reinforcement, which is formed at regular intervals by drilling holes H in the ground of the slope. After forming and grouting by inserting the nail structure 100 to be inserted therein, the acupressure plate 160 using the eye bolt 150 and the nut 152 to the ring 120 at the rear end of the saw nail structure 100. Front plate) to reinforce the cut slope, and this construction process is carried out in a top-down manner from the top to the bottom of the slope.

Soil nail method constructed in this way is the earth pressure generated, that is, the earth pressure is hardly applied to the surface of the slope so that the slope can be stabilized, and the length of the nail nail structure is shorter than the general earth anchor method, it is excellent in workability and shortened air can do.

14 to 16 show the connection state between the nail nail 100 and the panel retaining wall W in the case of constructing the panel retaining wall close to the slope, and the perforated hole H is formed in the ground of the slope. Formed at regular intervals, and after inserting and grouting the saw nail (100) made of a strip-shaped fiber reinforcement, the saw nail structure (100) to support the panel retaining wall (W) installed in front of the slope The eye bolt 150 is connected to the rear end ring 120 and exposed to the front of the panel retaining wall (W) to insert the pressure plate 160 and fasten the nut 152 to support the panel retaining wall (W). The rear of the panel-shaped retaining wall (W) is filled with a back-filling soil, etc. After the chopped by tightening the nut fastened to the panel by applying pretension can improve the stabilization and appearance of the slope.

17 to 19 illustrate the state in which the saw nail 100 of the present invention is used for reinforcement and slope greening of cut slopes. In the present embodiment, the rear end of the strip-shaped fiber reinforcement 110 forming the saw nail 100 is shown. The eye bolt 150 and the nut 152 to the ring 120 to connect the pressure plate 160, the pressure plate 160 is to be able to support the surface protection member 170 made of a ridged wire mesh, etc. In addition, the rear portion of the surface protection member 170 is to prevent the loss of the slope by filling the back filler 180 such as aggregate or soil.

In the present embodiment, the backfill material 180 may be planted with vegetation on slopes reinforced by planting seeds of various plants or planting plants.

20 and 21 show a connection state between the saw nail 100 and the block retaining wall W in the case of constructing the block retaining wall close to the slope, and the perforated hole H is formed in the ground of the slope. Formed at regular intervals, and after inserting and grouting the saw nail (100) made of a strip-shaped fiber reinforcement, the saw nail structure (100) to support the block-shaped retaining wall (W) installed in front of the slope The block retaining wall W can be supported by directly connecting a separate wire wire or strip-shaped fiber reinforcement 110 ′ as shown in the drawing between the rear ring 120 and the block forming the retaining wall W. FIG. The rear surface of the block-shaped retaining wall (W) can be stabilized by filling the back-filled soil and compacted.

FIG. 22 illustrates a state in which the saw nail of the present invention is used as a retaining wall support material (ground reinforcement material) for constructing the basement layer, which is exposed to the ring 120 at the rear end of the shoot nail 100 to the front of the retaining wall 190. By using the eye bolts 150 on the ring 120, the acupressure plate 160 is fastened, or the anchor pin or the like is directly inserted into the ring 120 to support the retaining wall 190.

FIG. 23 illustrates a state in which the saw nail of the present invention is used as a tunnel section supporter, and two examples of the saw nail illustrated in FIG. 23 are enlarged in FIGS. 24 and 25.

In the present embodiment, the saw nail 100, as shown in Figure 24, its rear end may be embedded in the drilling hole (H) and the end may be sealed (closed) as it is, as shown in Figure 25 It is also possible to support the inner surface of the tunnel by connecting a separate pressure plate 160 to the ring 120 of the rear end using the eye bolt 150 and the nut 152.

On the other hand, the saw nail structure shown in Figure 24 is shown so that the hook portion is located on the outer side of the drilled hole, more preferably, the nail portion to be positioned by the exercise of passive resistance by the ring by placing the ring portion inside the drilled hole To improve the bearing capacity of the structure.

26 and 27 illustrate a state in which the saw nail of the present invention is applied to the reinforcement and repair of the existing retaining wall. In this embodiment, the existing reinforcement soil retaining wall is deteriorated or the deformation of the front of the retaining wall is caused, thereby requiring safety and aesthetic improvement. If there is, a new front wall (W ') is built on the front of the existing retaining wall (W), and after the drilling hole (H) in the retaining wall (W) to install the saw nail 100 of the present invention , Between the nail nail 100 and the front wall (W ') to be supported by a separate band-like fiber reinforcement (110'), and between the existing reinforcement soil retaining wall (W) and the new front wall (W '). Repair work is done by filling aggregates or other backfills.

In the present embodiment, the saw nail and the front wall (W ') is to be connected in a continuous zigzag state of the strip-shaped fiber reinforcement (110') as shown in the cross-sectional view of Figure 27, the present invention is limited to this It is, of course, also possible to connect using other reinforcement or connecting members other than the known turn-buckles or band-shaped fiber reinforcement.

As described above, the saw nail structure according to the embodiments of the present invention is relatively inexpensive compared to conventional rebar or other saw nail materials, but using a strip-shaped fiber reinforcement having flexibility that is easy to transport and handle, thereby reducing logistics costs. It is easy and easy to handle. Especially, it is easy to install in a narrow place, and when inserting into the drilling hole, it can be inserted into a straight and extended state along the longitudinal direction. Since it is possible to fold and insert several times even if it is small, it is not necessary to drill a large hole. Therefore, it is possible to improve the workability and shorten the air. It is easy to connect and the ring-shaped connection made of geotextile Since it is in a soft state, it is possible to alleviate the concentration of stress in this part, and when the ring is buried inside the drilling hole, the passive resistance is exerted, thereby increasing the resistance even if the depth of the drilling hole is not drilled deeply. Stable support of slopes and walls is possible, and the band-shaped fiber reinforcement has a useful effect such as excellent corrosion resistance compared to a soil nail structure using a conventional rebar.

[Description of the code]

100: saw nail (or saw nail structure)

110,110 ': Band-shaped fiber reinforcement

111: wick

112: folding groove

113: sheath

120: ring

130: spacer

132: large neck

134: small diameter

140: grout

150: eye bolt

152: Nut

160: pressure plate

170: surface protection member

180: backfill

190: retaining wall

H: perforation hole

W: retaining wall

W ': front wall

Claims

After the belt-shaped fiber reinforcement of a predetermined length is folded along the longitudinal direction, at least one of the front end or the rear end of the band-shaped fiber reinforcement is folded in the width direction to insert the band-shaped fiber reinforcement into the boring hole of the ground, A method of using a strip-shaped fiber reinforcement as a saw nail structure, characterized in that the grout is filled into the perforated hole and cured.
The method according to claim 1,

The strip-shaped fiber reinforcement is a method of using a strip-shaped fiber reinforcement as a saw nail structure, characterized in that the groove is formed along the longitudinal direction.
The method according to claim 1,

The strip-shaped fiber reinforcement is a method of using a strip-shaped fiber reinforcement as a saw nail structure, characterized in that the ring is formed on both ends of the line.
The method according to any one of claims 1 to 3,

The one or both sides of the ring is a method of using a band-like fiber reinforcement as a saw nail structure, characterized in that formed in plurality.
The method according to claim 4,

The ring forms a passive resistance portion inside the drilling hole, and a band-like fiber reinforcement as a saw nail structure, characterized in that it is used as a connection with the front member including a wall or a surface protection member outside the drilling hole.
Fold the strip-shaped fiber reinforcement of a predetermined length along the length direction, fold the tip in the width direction, insert it into the drilled hole of the ground, and then grout the hardened by filling the drilled hole into the hole. A method of using a strip-shaped fiber reinforcing material as a sawn nail structure, characterized in that continuously connected to the drilling hole.
The method according to any one of claims 1,2,3,6,

Nail structure to shoot the strip-shaped fiber reinforcement is inserted into the strip-shaped fiber reinforcement to maintain the folded state in the longitudinal direction and the width direction and to insert the strip-shaped fiber reinforcement in the center of the drilling hole when inserted into the drilling hole How to use as.
The method according to any one of claims 1,2,3,6,

Said nail structure is a nail structure to shoot a strip-shaped fiber reinforcement, characterized in that it is used for any one of the reinforcement, soil wall support (ground reinforcement), tunnel support, ground reinforcement for the existing reinforced soil retaining wall reinforcement (repair). How to use as.