JP6322542B2 - Reinforcing material and its construction method - Google Patents

Description

  The present invention relates to a reinforcing material used for slope stabilization for stabilizing the ground of a slope where the surface ground may collapse or peel off, and a method for producing the same.

  Slope stabilization works include, for example, a rock bolt construction method that uses a reinforcing material to suppress a relatively small soil block (moving layer) near the surface of the slope, and a relatively large moving layer up to the deep ground. There is a known ground anchor construction method that uses a reinforcing material to prevent the above.

  The rock bolt method is to create a hole to the stable ground (immobilized layer) deeper than the moving layer near the ground surface of the slope, place steel material in this hole, and replace the space around this steel material Reinforcement material is created in the ground near the ground surface by filling it with an injection material (grout) such as soil cement, and the moving layer near the ground surface is relatively small mainly due to the frictional force between the ground and the reinforcement material. It is a construction method that suppresses large-scale landslides.

  On the other hand, in the ground anchor method, a steel or steel pipe anchor body is placed in a hole drilled to the immovable layer further ahead of the moving layer to the deep ground of the slope, and the surrounding area is filled with an injection material and fixed. A fixed anchor body and a head fixing material having a pressure receiving plate near the ground surface are connected using a high-strength tensile material to generate a tensile force, and a ground that is a relatively large and long reinforcing material in the ground. By creating an anchor, the moving layer is sandwiched by the frictional force between the stable ground and the anchor body, and the tensile force between the anchor body and the head anchoring material, and the landslide of a relatively large moving layer is suppressed. It is a construction method.

  In the ground anchor method, a bag body (sheath) is provided with injection means so as to surround the periphery of the anchor body of the steel pipe, and the injection material is injected into the bag body to inflate it, thereby injecting the steel pipe of the anchor body and the surrounding area. The frictional force with the material can be increased to make it difficult to pull out, the strength against tensile force can be increased, and the anchoring property of the anchor body can be improved. Furthermore, by providing this bag body, the steel pipe of the anchor body and the surrounding hardened injection material can be integrated, and the tensile strength can be increased. Furthermore, if a bag is provided, cracks in the injected material after hardening due to the elastic difference between the steel pipe and the injected material when tensile force is applied can be suppressed, and corrosion of the steel pipe due to penetration of cracks in groundwater This eliminates the need for a spacer to maintain a constant distance from the hole at the time of installation, and even if the ground around the drilling hole is sandy or has cracks in the ground, the injected material will be washed away. The cost of the injection material can be reduced (see, for example, Patent Document 1).

  Moreover, the ground anchor construction method can obtain a strong bearing resistance force against the pulling force by inflating a plurality of bag bodies in the length direction of the anchor body. Further, even when the bag body has water permeability and air permeability, since the injecting material gradually clogs the fiber fibers of the bag body, the bag body finally swells and the fixability can be improved. By using a non-water-permeable bag body (sheath) to inject and inflate the injection material into the bag body, groundwater penetrates due to cracks after the injection material has hardened, and the anchor body steel pipe or metal It can control that a tension material corrodes (for example, refer to patent documents 2).

  In addition, the ground anchor method uses a double injection pipe structure for the anchor body part and an injection packer on the inner pipe when the soil quality of the immovable layer ground is poor and sufficient anchorage cannot be obtained with the anchor body alone. By doing so, the surrounding material can be filled multiple times by expanding the injected material so that it protrudes radially in a random substantially pulse shape or substantially noise shape in the depth direction (see, for example, Patent Documents 3 and 4).

JP-A-2-171417 JP-A-4-7411 Japanese Patent No. 2922041 Japanese Patent No. 3373171

  However, in the above-described rock bolt method, the shape and diameter of the reinforcing material created in the ground are restricted by the drilling holes. For this reason, in the rock bolt method, only a substantially cylindrical reinforcing material equal to the diameter of the drilling hole could be created. The substantially columnar reinforcing material has a problem in that there is no change in diameter on the side surface that generates a frictional force with the ground, and there is little bearing resistance against the pulling force.

  Also, in the rock bolt method, in order to increase the frictional force with the ground of the reinforcing material, a drill hole with a relatively large diameter is created and filled with an injection material so as to replace the space of the hole to form a cylindrical shape. It can be solidified. In that case, in order to suppress relatively small-scale landslides, a large drilling machine must be used, and a robust scaffold corresponding to the large drilling machine can be assembled with effort, time and cost. There was also the problem of having to.

  Furthermore, in the rock bolt method, since the bending strength of the reinforcing bars, which are tensile core materials, is low, a large number of reinforcing materials had to be placed at a small pitch when the required landslide deterrence was high. . However, when a large number of reinforcing materials are placed at a small pitch, the upper surface of the ground may be raised, and there is a possibility of hindering the leveling of the structure (for example, railroad rails) on the upper portion of the ground. There was also a problem.

  Then, this inventor examined the method which can suppress a comparatively small-scale landslide using the technique of a ground anchor construction method instead of a rock bolt construction method. However, the ground anchor method is intended to suppress relatively large-scale landslides, and the construction equipment including the structure of the reinforcing material, drilling machines and scaffolds is also large. For this reason, if the technology of the ground anchor method is used as it is in order to suppress relatively small landslides, the structure and construction scale of the reinforcing material will become large, and in addition, tensile force will be applied to the reinforcing material. Therefore, there is a problem that cost increase cannot be avoided.

  The present invention has been made in view of the above-described problems, and can increase the bearing resistance of the reinforcing material against pulling out, and can suppress relatively small-scale landslides easily and inexpensively. The purpose is to provide a reinforcing material and a method for producing the same.

  In order to achieve the above object, the reinforcing material of the present invention is a reinforcing material that is formed on the ground by an injection material that is placed in a hole drilled in the ground, and is injected by pressure into the injection tube, The injection tube has a size that can be expanded to a size having a plurality of discharge holes spaced in the longitudinal direction and a diameter larger than the diameter of the hole drilled in the ground by the injection material discharged from the discharge hole. A sheet material including a region surrounding at least one discharge hole and covering the region surrounding the injection tube in a tubular shape and having both longitudinal ends of the injection tube fixedly fixed to the injection tube. In the pressure injection, the injection material is expanded from the at least one discharge hole in the hole formed by drilling the sheet material in the ground and discharged into the ground outside the drilled hole. As a result of the solidification of the injected material together with the soil in the ground, at least One of the bulging portion is reclamation, further by solidification of the injected material and the bulge portion and the sheet material in the ground and injection tube are coupled together, it is constituted to be reclamation by.

  In order to achieve the above object, a first reinforcing material building method of the present invention is the above-described reinforcing material building method of the present invention, comprising a step of drilling a hole in the ground, and an injection pipe in the hole. And injecting the injection material into the injection tube under pressure, the injection material expands from the at least one discharge hole of the injection tube in the hole in which the sheet material is drilled in the ground, and the drilled hole And a step of releasing into the outer ground.

  Preferably, in the first reinforcing material forming method of the present invention, at least one discharge hole of the injection tube is closed at normal pressure, and is closed by a closing member that discharges the injection material at the time of pressurized injection. The sheet material may be expanded by the injected material discharged through at least one closing member.

  Preferably, in the first reinforcing member creation method of the present invention, the position of at least one closing member covered with the sheet material may be the discharge hole on the most surface side of the injection pipe.

  Preferably, in the first reinforcing material forming method of the present invention, the sheet material is a water-permeable fabric having a stitch that allows at least a part of the solid material other than the liquid component to pass through as well as the liquid component of the injection material. It is good to be formed with.

  Preferably, in the first method for producing a reinforcing material according to the present invention, the sheet material may be formed of an elastomer that is ruptured when the pressure of the injection material becomes a value equal to or higher than the expansion limit.

  Preferably, in the first reinforcing material building method of the present invention, the sheet material is provided at every other discharge hole of the injection tube.

  According to the reinforcing material and the method for producing the same of the present invention, it is possible to increase the bearing resistance force of the reinforcing material against the pulling force, and it is possible to easily and inexpensively suppress a relatively small landslide.

Fig.1 (a) is the schematic which shows the injection pipe used for the construction method of the reinforcement material which concerns on 1st Embodiment of this invention, The same figure (b) is the reinforcement which concerns on 3rd Embodiment of this invention. It is the schematic which shows the injection tube used for the construction method of a material, The figure (c) is the schematic which shows the packer for injection arrange | positioned inside the injection tube which concerns on 2nd Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic for demonstrating the creation method of the reinforcing material which concerns on 1st Embodiment of this invention, The figure (a) is a hole drilling process of the ground, The figure (b) is the injection process of an injection material, The figure (C) shows the process of arranging an injection tube and creating a plurality of substantially bulbous bulges along the longitudinal direction of the injection tube. It is the schematic for demonstrating the creation method of the reinforcing material which concerns on 1st Embodiment of this invention, FIG.3 (a) is the process of filling an injection material into the inside of an injection tube, The same figure (b) The step of arranging the core material in the injection tube filled with the injection material, FIG. 5C shows the step of bonding the fixing material to the extra length portion of the core material. It is the schematic for demonstrating the creation method of the reinforcement material which concerns on 2nd Embodiment of this invention, The same FIG. 4 (a) is the hole which drilled the injection material from the discharge hole of the innermost direction of the injection pipe in the longitudinal direction. FIG. 4B shows a step of discharging into the ground on the outer side to create a substantially bulbous bulge, and FIG. 5B shows a step outside the hole in which the injection material is drilled from the central discharge hole in the longitudinal direction of the injection pipe. The step of discharging into the ground to form a substantially bulbous bulge is shown. FIG. 8C shows the outer side of the hole formed by drilling the injection material from the discharge hole on the outermost layer side in the longitudinal direction of the injection tube. The process of discharging into the ground and creating a substantially bulbous bulge is shown. It is the schematic for demonstrating the creation method of the reinforcing material which concerns on 3rd Embodiment of this invention, Fig.5 (a) is a hole drilling process of the ground, FIG.5 (b) is an injection | pouring process of an injection material, the same figure. (C) shows the arrangement | positioning process of an injection tube, and the same figure (d) shows the process of creating several substantially bulbous bulging parts along the longitudinal direction of the arrange | positioned injection tube. It is the schematic for demonstrating the construction method of the reinforcement material which concerns on 4th Embodiment of this invention, Fig.6 (a) is an injection material through a sheet | seat material from the innermost discharge hole of the injection pipe in the longitudinal direction. The step of discharging into the ground outside the drilled hole to create a substantially bulbous bulge is shown in FIG. 5B. The injection material is passed through the sheet material from the discharge hole at the center in the longitudinal direction of the injection tube. The step of discharging into the ground outside the hole drilled to create a substantially bulbous bulge is shown in FIG. 5 (c) from the discharge hole on the outermost layer side in the longitudinal direction of the injection tube. Is a step of forming a substantially bulbous bulging portion by discharging the material into the ground outside the hole drilled through the sheet material. FIGS. 7A, 7B, and 7C are schematic views for explaining a reinforcing material generating method according to the fifth embodiment of the present invention. FIGS. 8A, 8B, and 8C are schematic views for explaining a reinforcing material forming method according to the sixth embodiment of the present invention, and FIG. 8A is a longitudinal direction of the injection tube. The step of discharging the injection material from the innermost discharge hole into the ground outside the hole drilled through the sheet material to form a substantially bulbous bulging portion is shown in FIG. A substantially radial bulge that protrudes radially in the depth direction from the central discharge hole in the longitudinal direction into the ground outside the hole where the injection material has been drilled is randomly generated in the depth direction. FIG. 6C shows a substantially bulbous shape in which the injection material is discharged from the discharge hole on the outermost surface layer side in the longitudinal direction of the injection tube into the ground outside the hole drilled through the sheet material. The process of creating a bulging part is shown.

<First Embodiment>
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
The reinforcing material of the first embodiment shown in FIG. 1 (a) and FIGS. 2 (a) to (c) and FIGS.
(A) An injection tube 40 provided with a plurality of discharge holes 47 at intervals along the longitudinal direction and attached with a rubber sleeve 41 so as to close each discharge hole 47;
(B) The replacement injection material injected into the hole 111 drilled in the ground 100 for the first time (replacement injection) replaces the space between the hole 111 and the injection pipe 40 by the arrangement of the injection pipe 40. A replacement tubular fixing body 30 that is formed into a tubular shape and is formed by a solidified product obtained by solidifying the tubular structure,
(C) From the injection tube 40, the second bulge injection material is discharged into the ground 100 from a plurality of discharge holes 47 provided at intervals along the longitudinal direction of the injection tube 40. Further, the secondary bulge fixing body 31 which is a bulge portion formed by integrally joining the bulge portion in the ground which is a solidified product together with the earth and sand in the ground and the injection pipe,
(D) an inner fixing body 60 formed of a solidified product obtained by solidifying the injection material injected into the injection tube 40; and (E) a core material 70 disposed in the injection tube 40.
(F) The secondary bulge fixing body 31 that is the bulge portion is a second bulge at the first position, which is a plurality of bulge portions made of a solidified material of the injection material and earth and sand along the longitudinal direction. Fixing body 31a, secondary bulging fixing body 31b at the second position, secondary bulging fixing body 31c at the third position
It is built by.

  As the material of the injection pipe 40 in the case of the above-described embodiment, for example, STK400 of general structural carbon steel pipe steel (STK) defined in Japanese Industrial Standard (JIS) G3444 can be used. Further, as the material of the core material 70, for example, deformed reinforcing bars defined by Japanese Industrial Standard (JIS) G3112, deformed steel bars (SD) SD295, SD345, and the like can be used.

  As shown in FIG. 1 (a), the injection tube 40 is made of an elastomer such as raw rubber or synthetic rubber as a closing member for closing a plurality of discharge holes 47 provided at intervals along the longitudinal direction. A rubber sleeve 41 is provided that is formed in a sleeve shape that can be attached to the outer side of the 40. The rubber sleeve 41 is formed in a sleeve shape so as to cover the periphery of the injection tube 40 so as to cover each discharge hole 47 of the injection tube 40, and when the injection material is injected, the rubber sleeve 41 starts from the injection material of each discharge hole 47. By swelling elastically by the received pressure, a gap is formed between the injection tube 40 and the rubber sleeve 41 from each discharge hole 47 to the open end of the rubber sleeve 41, and the injection material can be discharged without any problem. The rubber sleeve 41 closes each discharge hole 47 of the injection tube 40 so that the pressure from the outside is pressed against the discharge hole 47 and comes into closer contact with each other. Can be prevented. Further, since the protruding amount of the rubber sleeve 41 can be minimized when the injection tube 40 is disposed in the hole 111, the rubber sleeve 41 protrudes more than necessary and does not interfere with the arrangement.

  Examples of the material of the rubber sleeve 41 include polyisoprene (natural rubber, synthetic natural rubber), butadiene / styrene copolymer (styrene butadiene rubber), polybutadiene (butadiene rubber), polychloroprene (chloroprene rubber), and isoprene / isoprene. A polymer (butyl rubber), a butadiene / acrylonitrile copolymer (nitrile rubber), polyurethane (urethane rubber), organic polysiloxane (silicone rubber), or the like can be used. As for the thickness dimension of the rubber sleeve 41, when the injection material is injected from the inside of the injection tube 40 using the injection packers 50 to 52, if the rubber sleeve 41 is too thin, the rubber does not shrink after the injection of the injection material. May occur. On the contrary, if the rubber sleeve 41 is too thick, a gap between the injection tube 40 and the rubber sleeve 41 is hardly formed. In addition, when the rubber does not shrink, the second injection material cannot be injected, so that the injection cannot be repeated a plurality of times. More specifically, for example, when natural rubber having a hardness of 65 ° is used, if the thickness of the rubber sleeve 41 is 2.0 mm or less, there is a possibility that the rubber will not shrink after the injection of the injection material. Therefore, it is preferably set to 2.5 mm or more and 4.0 mm or less in which a gap is easily formed. More preferably, the thickness of the rubber sleeve 41 is 3.0 to 3.5 mm.

The reinforcing material 31 of the first embodiment is formed by the following process.
(1) Step of drilling the hole 111 in the ground 100 with the casing tube 10 and the rod 11: FIG.
(2) Step of placing the injection tube 20 in the hole 111 and injecting the injection material: FIG.
(3) placing the injection tube 40 in the hole 111 into which the injection material has been injected before the injection material is solidified, and forming the replacement tubular fixing body 30 around the injection tube 40;
(4) Pressurize the injection tube 40 so that the injection material is discharged from the gap between the rubber sleeve 41 and the injection tube 40 so as to block the discharge holes 47 of the injection tube 40, and add the injection material at a time. Step of injecting pressure and discharging the injection material from all the discharge holes 47 of the injection pipe 40 into the ground 100: FIG. 2 (c);
(5) Step of filling the injection tube 40 with the injection material FIG.
(6) A step of attaching an anchor plate 80 and a nut 81 as a fixing material to the extra length portion of the injection tube 40 exposed to the ground 100;
Is included.
In (5), a rod-shaped core material 70 may be disposed in the injection tube 40 filled with the injection material.
In (6), an anchor plate 80 and a nut 81, which are fixing materials, are attached to the surplus portion of the core material 70 exposed on the ground 100: FIG. 3 (c).

  In the present embodiment, as shown in FIGS. 4A to 4C, when the discharge of the injection material from all the discharge holes 47 of the injection tube 40 into the ground 100 is completed, the injection material 40 shown in FIG. As described above, the injection packers 50 to 52 are extracted, the injection tube 20 is arranged in the injection tube 40, and the injection material is filled. Thereafter, as shown in FIG. 3B, a high-strength rod-shaped core material 70 such as a reinforcing bar is disposed in the injection tube 40 filled with the injection material. Further, as shown in FIG. 3C, an anchor plate 80 as a fixing material is fitted into the extra length portion exposed on the ground 100 in the core material 70 and fixed with a nut 81.

  In addition, the thickness of the surrounding replacement tubular fixing body 30 can be made constant by using the spacer of the dimension which maintains the space | interval with the surrounding hole constant for the injection tube 40. FIG. The injection tube 20 can be omitted if the injection tube 40 can be replaced. In that case, the injection tube 40 is disposed in the hole 111 and pressurized to discharge the injection material to the surroundings, once the replacement tubular fixing body 30 is formed, and then further pressurized to inject the injection material. The injection material may be discharged.

  The injection tube 40 is pressurized using a double tube double packer so as to penetrate through the replacement tubular fixing body 30 when solidified to some extent, and the injection material is discharged and solidified. The fixing member 31 can be formed, and the replacement tubular fixing member 30 and the injection tube 40 can be combined and integrated. In this case, the injection amount (specified amount) of the injection material is generally about 30 L at the maximum, for example, but varies depending on the diameter and depth of the hole 11, the type of soil / ground, and the like. In this case, the injection pressure (specified pressure) of the injection material is generally 2 MPa, for example, but this also varies depending on the diameter and depth of the hole 11, the type of soil / ground, and the like. At the time of injection, the injection material is injected until reaching any one of the values, and when it reaches, it ends.

  As described above, in the reinforcing material of the present embodiment, a plurality of substantially bulb-shaped bulged portions 31a to 31c made of a solidified product of an injection material and earth and sand in the ground are integrated so as to be aligned in the longitudinal direction, and a skewer shape is formed. In the case of reinforcing a landslide on a relatively small slope ground by combining the injection pipe 40 integrally with the injection pipe 40, compared with the method using the ground anchor described above, Simplification of structure and control of number and diameter, control of the amount of reinforcing material, reduction of the base material and equipment used for the construction of the reinforcing material and control of use time, reduction of material costs and man-hours, and construction work period By shortening or the like, the bearing resistance against the pulling force of the fixing body can be increased to the same level as that of the ground anchor, and the cost increase due to the increase in the reinforcing material or the construction scale can be suppressed. The simplification of the structure of the reinforcing material means that, for example, connection of a tensile wire or the like to the fixing material on the ground surface becomes unnecessary.

  In the reinforcing material of the present embodiment, solidified together with the earth and sand in the ground to the outside of the hole 111 by the injection material discharged into the ground 100 from the injection pipe 40 to which the rubber sleeve 41 is attached so as to block each discharge hole 47. A secondary bulging and fixing body 31 including a bulging portion that bulges (secondary bulging and fixing body 31a at the first position, secondary bulging and fixing body 31b at the second position, and secondary at the third position). A bulging and fixing body 31c) is formed. By forming the secondary bulging and fixing body 31 as a reinforcing material, it is possible to increase the bearing resistance force of the reinforcing material against the pulling force, and to suppress relatively small-scale landslides easily and inexpensively. It becomes possible. Further, since the injection of the injection material is performed once, the material cost, the number of man-hours, and the use time of the apparatus can be suppressed, and the work period can be shortened.

Second Embodiment
Hereinafter, with respect to the above-described first embodiment, the second embodiment of the present invention, which enables discharge in an individual order for each discharge hole using an injection packer, will be described below with reference to the drawings. However, it explains in detail.
1 (a), 2 (a)-(b), 3 (a)-(c), and 4 (a)-(c), the reinforcing material of the second embodiment is
(A) an injection tube 40;
(B) The first injection material (substitution injection) injected into the hole 111 drilled in the ground 100 is formed into a tubular shape by the arrangement of the injection tube 40, and is further formed from a solidified product obtained by solidifying it. A replacement tubular fixing body 30;
(C) The second bulging injection material from the inner pipe 50 having a plurality of longitudinal injection holes 57 and injection packers 51 and 52 disposed in the injection pipe 40 is the injection pipe 40. A plurality of discharge holes 47 provided at intervals along the longitudinal direction of the ground are discharged into the ground 100, which is a bulging portion formed by a solidified material solidified with the earth and sand in the ground. A next bulging and fixing body 31;
(D) an inner fixing body 60 formed of a solidified product obtained by solidifying the injection material injected into the injection pipe 40;
(E) a core material 70 disposed in the injection tube 40;
(F) The secondary bulge fixing body 31 that is the bulge portion is a second bulge at the first position, which is a plurality of bulge portions made of a solidified material of the injection material and earth and sand along the longitudinal direction. Fixing body 31a, secondary bulging fixing body 31b at the second position, secondary bulging fixing body 31c at the third position
It is built by.

The reinforcing material 31 of the second embodiment is formed by the following process.
(1) Step of drilling the hole 111 in the ground 100 with the casing tube 10 and the rod 11: FIG.
(2) Step of placing the injection tube 20 in the hole 111 and injecting the injection material: FIG.
(3) a step of arranging the injection tube 40 in the hole 111 into which the injection material has been injected and forming the replacement tubular fixing body 30 around the injection tube 40;
(4) a step of arranging the injection packers 50 to 52 in the injection tube 40;
(5) Step of injecting the injection material through the injection packers 50 to 52 and discharging the injection material from the innermost discharge hole 47 of the injection tube 40 into the ground 100: FIG.
(6) The injection packers 50 to 52 are moved along the longitudinal direction of the injection tube 40, the injection material is injected under pressure through the injection packers 50 to 52, and the ground 100 is discharged from the other discharge holes 47 of the injection tube 40. Step of discharging the injection material into: FIG. 4 (b) to (c),
(7) Step of extracting the injection packers 50 to 52 and filling the injection tube 40 with the injection material: FIG.
(8) Step of disposing the rod-shaped core material 70 in the injection tube 40 filled with the injection material: FIG.
(9) A process of attaching an anchor plate 80 and a nut 81 as a fixing material to a surplus length portion exposed to the ground 100 in the core material 70: FIG.
Is included.

  Inside the injection tube 40, an inner tube 50 to which injection packers 51 and 52 are attached is disposed as shown in FIGS. 1 (c) and 4 (a) to (c). The inner tube 50 is provided with an injection hole 57 for injecting an injection material along the longitudinal direction. The injection packers 51 and 52 are arranged for each discharge hole 47 of the injection tube 40 at a position where the inner region of the injection tube 40 can be isolated. The inner pipe 50 is independently provided with a path for pumping the injection material and a path for pumping a fluid such as water or air for expanding the injection packers 51 and 52 by a double pipe structure or the like. The movement of the injection packers 51 and 52 is performed by moving only the injection packers 51 and 52 relative to the fixed inner tube 50 while maintaining the interval. A method of moving the tube 50 while pulling out may be used. By moving the injection packers 51 and 52 inside the injection tube 40 as described above, the injection material can be delivered only from the target discharge hole 47 of the injection tube 40.

  In the above-described steps (5) and (6) in which the injection material is discharged into the ground 100 from the discharge hole 47 of the injection tube 40 (see FIGS. 4A to 4C), first, The inner tube 50 is disposed on the inner side, and the injection packers 50 to 52 are disposed at the innermost position. In this state, as shown in FIG. 3 (a), the injection material is discharged into the ground 100 from the innermost discharge hole 47 of the injection tube 40 via the rubber sleeve 41 and the cloth sleeve-like sheet material 43, and is approximately A secondary bulging and fixing body 31a at the first position, which is a bulbous bulging portion, is obtained. Next, the injection packers 50 to 52 are arranged at the second position from the back. In this state, as shown in FIG. 3B, the injection material is discharged into the ground 100 from the second discharge hole 47 from the back of the injection tube 40 through the rubber sleeve 41 and the cloth sleeve-like sheet material 43, A secondary bulge fixing body 31b in the second position, which is a substantially bulbous bulge, is obtained. Finally, the injecting packers 50 to 52 are arranged at the third (frontmost) position from the back. In this state, as shown in FIG. 3C, injection is made into the ground 100 through the rubber sleeve 41 and the cloth sleeve-like sheet material 43 from the third (most front) discharge hole 47 from the back of the injection tube 40. The material is discharged to obtain the secondary bulging and fixing body 31c at the third position, which is a substantially bulbous bulging portion. Each secondary bulging and fixing body 31a to 31c is mixed and integrated with the replacement tubular fixing body 30 by the first replacement injecting material, and the injecting material into which each secondary bulging and fixing body 31a to 31c is injected. Therefore, they are integrated in the longitudinal direction to form a skewer shape.

  The injection packers 50 to 52 are double tube double packers. In this embodiment, the packers 51 and 52 fixed to the tip of the inner tube 50 are pulled up to the ground surface side for each discharge hole 57 of the inner tube 50. inject. In that case, at the position of each discharge hole 57, the injection amount (specified amount) of the injection material is generally about 30 L at the maximum, for example, and the injection pressure (specified pressure) of the injection material is generally about 2 MPa, for example. The injection material is injected until one of the values is reached, and the process is terminated. However, the injection amount in this case varies depending on the diameter and depth of the hole 11 and the type of soil / ground, and the injection pressure (specified pressure) of the injection material is also the diameter and depth of the hole 11 and the type of soil / ground. Fluctuates depending on.

  About another structure and operation | movement, it is the same as that of the reinforcing material of 1st Embodiment. Therefore, also in the reinforcing material of the second embodiment, by forming the secondary bulging and fixing body 31 into the reinforcing material, it is possible to increase the bearing resistance force of the reinforcing material against the pulling force, which is relatively small. It is possible to suppress a simple landslide simply and inexpensively. Further, since the pressure injection of the injection material can be performed at the position of any discharge hole, the degree of freedom with respect to the ground condition and material cost can be increased. Furthermore, in the reinforcing material of the second embodiment, the injection material can be discharged from the arbitrary discharge hole 47 of the injection pipe 40 into the ground 100 by the injection packers 50 to 52, so that the discharge on the innermost side is performed. In order to eliminate waste by carrying out in order from the hole, to prevent injection from the ground surface side in order from the discharge hole on the near side, injection material only from any number of discharge holes, such as only one place or only two places The efficiency can be improved and the cost can be reduced by the necessary number of bulges.

<Third Embodiment>
Hereinafter, with respect to the above-described first embodiment, a sleeve-like (bag-like) sheet material 43 that expands in response to the injection material discharged through the rubber sleeve is used in the soil where the injection material is excessively expanded. A third embodiment of the present invention that enables controlled release will be described below in detail with reference to the drawings.
The reinforcing material of the third embodiment shown in FIGS. 1A to 1B, 3A to 3B, and 5A to 5D is
(A) an injection tube 40;
(B) The first injection material (substitution injection) injected into the hole 111 drilled in the ground 100 is formed into a tubular shape by the arrangement of the injection tube 40, and is further formed from a solidified product obtained by solidifying it. A replacement tubular fixing body 30;
(C) A sleeve-like shape in which a second inflating infusion material disposed in the infusion tube 40 expands from a plurality of discharge holes 47 provided at intervals along the longitudinal direction of the infusion tube 40 ( A secondary bulging fixing body 31 which is a bulging portion which is discharged into the ground 100 through the sheet material 43 in a bag shape and is further solidified together with the earth and sand in the ground;
(D) an inner fixing body 60 formed of a solidified product obtained by solidifying the injection material injected into the injection pipe 40;
(E) The secondary bulge fixing body 31 that is a bulge portion is a second bulge at a first position that is a plurality of bulge portions made of a solidified product of the injection material and earth and sand along the longitudinal direction. Fixing body 31a, secondary bulging fixing body 31b at the second position, secondary bulging fixing body 31c at the third position
It is built by.

  As shown in FIG. 1B, the injection tube 40 has a sleeve-like (bag-like) shape that expands by receiving the injection material discharged through the rubber sleeve 41 outside the rubber sleeve 41 (closing member). A plurality of sheet materials 43 are provided at intervals along the longitudinal direction of the injection tube 40 so as to cover the rubber sleeve 41, and the end portions of the entire periphery of the sheet material 43 are tightly fixed to the injection tube 40. It is attached in this way. In other words, the sheet material 43 has a size that can be expanded to a size having a diameter larger than the diameter of the hole 111 drilled in the ground 100 by the injection material discharged from the discharge hole 47. The surrounding region of the injection tube 40 including the surrounding region is covered in a tubular shape, and both end portions of the sheet material 43 in the longitudinal direction of the injection tube 40 are tightly fixed to the injection tube 40.

  Since the rubber sleeve 41 is in a sleeve shape, the sheet material 43 is formed into a sleeve shape that is one or more times larger than that, and both open ends of the sleeve-like (bag-like) sheet material 43 are tightly-fixed binding bands 45. Thus, the outer periphery of the injection tube 40 is tightly fixed. In this way, the outer side of the rubber sleeve 41 of each discharge hole 47 is covered with the sheet material 43 formed so as to be able to expand upon receiving the injection material discharged through the rubber sleeve 41, and the end portion of the entire periphery thereof. By sticking and fixing, the sheet material can remain inside the sheet material covered with the injection material and can be expanded into a spherical shape. As a result, the plurality of bulging portions made of the solidified product of the injection material and the earth and sand in the ground can be formed into a shape similar to a substantially bulbous shape as obtained in the case of the sand ground or the like. As described above, the sleeve-like sheet material 43 is fixed to the outer side of each rubber sleeve 41 of the injection tube 40 by the tight-fixing binding band 45, so that the secondary bulging and fixing body has a substantially bulb-shaped continuous skewer. It can be made into a dumpling shape.

  The material of the sleeve-like sheet material 43 of the present embodiment is made of a cloth having water permeability. Since both open ends are tightly fixed to the injection tube 40 by the binding band 45 as described above, the injection material is injected under pressure through the injection packers 50 to 52, and the other discharge holes 47 of the injection tube 40. When the injection material is discharged from the cloth, the cloth sheet material 43 has resistance to permeate even if it has water permeability, so that it gradually swells while releasing some water from the injection material to the limit. When it swells, only the moisture from the injection material is released to the outside from the cloth sheet material 43. At that time, the solid component of the injection material is concentrated by reducing only moisture from the injection material. As a result, a plurality of bulging portions made of a solidified product of the injecting material and the earth and sand in the ground can be formed into a shape swelled by the cloth sleeve, and can have a shape similar to a substantially bulbous shape. Since the swelled shape of the cloth sleeve is created for each installation position of the sleeve-like sheet material 43, the secondary bulging and fixing body can be formed into a continuous skewer shape having a substantially bulbous shape.

The reinforcing material 31 of the third embodiment is formed by the following process.
(1) Step of drilling hole 111 in ground 100 with casing tube 10 and rod 11: FIG.
(2) Step of placing the injection tube 20 in the hole 111 and injecting the injection material: FIG.
(3) Step of placing the injection tube 40 in the hole 111 into which the injection material is injected before the injection material is solidified, and forming the replacement tubular fixing body 30 around the injection tube 40: FIG.
(4) Pressurize the injection tube 40 so that the injection material is discharged from the gap between the rubber sleeve 41 and the injection tube 40 so as to block the discharge holes 47 of the injection tube 40, and add the injection material at a time. The step of injecting pressure and expanding the sheet material 43 in the hole 111 drilled in the ground 100 and discharging the injected material into the ground 100 from all the discharge holes 47 of the injection pipe 40 through the sheet material 43: FIG. 5 (d),
(5) Step of filling the injection tube 40 with the injection material FIG.
(6) A step of attaching an anchor plate 80 and a nut 81 as a fixing material to the extra length portion of the injection tube 40 exposed to the ground 100;
Is included.
In (5), a rod-shaped core material 70 may be disposed in the injection tube 40 filled with the injection material.
In (6), an anchor plate 80 and a nut 81, which are fixing materials, are attached to the surplus portion of the core material 70 exposed on the ground 100: FIG. 3 (c).

  In the reinforcing material of the present embodiment, the sheet material 43 that is expanded by the injection material is provided outside the rubber sleeve 41, so that the injection material advances along a weak pressure gap in the viscous land base 100 or the like in the depth direction. It is possible to suppress enlargement so as to protrude in a random, substantially pulse-like or substantially noise-like manner. In contrast to a random substantially pulsed shape or a noise-like radial shape, a continuous skewer shape having a substantially bulbous shape increases the strength of the element surface perpendicular to the extraction force, and even with a large extraction force, The next bulging and fixing body does not collapse, and the bearing resistance can be increased.

  About another structure and operation | movement, it is the same as that of the reinforcing material of 1st Embodiment. Therefore, also in the reinforcing material of the third embodiment, by forming the secondary bulging and fixing body 31 into the reinforcing material, it is possible to increase the bearing resistance force of the reinforcing material against the pulling force, which is relatively small. It is possible to suppress a simple landslide simply and inexpensively. Further, since the injection of the injection material is performed once, the material cost, the number of man-hours, and the use time of the apparatus can be suppressed, and the work period can be shortened. Furthermore, in the reinforcing material of the second embodiment, the injection material can be discharged from the arbitrary discharge hole 47 of the injection pipe 40 into the ground 100 by the injection packers 50 to 52, so that the discharge on the innermost side is performed. In order to eliminate waste by carrying out in order from the hole, to prevent injection from the ground surface side in order from the discharge hole on the near side, injection material only from any number of discharge holes, such as only one place or only two places The efficiency can be improved and the cost can be reduced by the necessary number of bulges.

<Fourth embodiment>
Hereinafter, with respect to the above-described third embodiment, a fourth embodiment of the present invention that enables discharge in an arbitrary order for each discharge hole using an injection packer will be described below with reference to the drawings. However, it explains in detail.
1 (a)-(c), FIGS. 3 (a)-(c), FIGS. 5 (a)-(c), and the reinforcing material of the second embodiment shown in FIGS. 6 (a)-(c). Is
(A) an injection tube 40;
(B) The first injection material (substitution injection) injected into the hole 111 drilled in the ground 100 is formed into a tubular shape by the arrangement of the injection tube 40, and is further formed from a solidified product obtained by solidifying it. A replacement tubular fixing body 30;
(C) The second bulging injection material from the inner pipe 50 having a plurality of longitudinal injection holes 57 and injection packers 51 and 52 disposed in the injection pipe 40 is the injection pipe 40. From the plurality of discharge holes 47 provided at intervals along the longitudinal direction, the sheet 100 is discharged into the ground 100 through the expanding sheet material 43, and is discharged into the ground 100. A secondary bulging and fixing body 31 which is a bulging portion formed by a solidified material solidified with earth and sand;
(D) an inner fixing body 60 formed of a solidified product obtained by solidifying the injection material injected into the injection pipe 40;
(E) a core material 70 disposed in the injection tube 40;
(F) The secondary bulge fixing body 31 that is the bulge portion is a second bulge at the first position, which is a plurality of bulge portions made of a solidified material of the injection material and earth and sand along the longitudinal direction. Fixing body 31a, secondary bulging fixing body 31b at the second position, secondary bulging fixing body 31c at the third position
It is built by.

The reinforcing material 31 of the fourth embodiment is formed by the following process.
(1) Step of drilling hole 111 in ground 100 with casing tube 10 and rod 11: FIG.
(2) Step of placing the injection tube 20 in the hole 111 and injecting the injection material: FIG.
(3) Step of placing the injection tube 40 in the hole 111 into which the injection material has been injected and forming the replacement tubular fixing body 30 around the injection tube 40: FIG.
(4) a step of arranging the injection packers 50 to 52 in the injection tube 40;
(5) A step of injecting the injection material through the injection packers 50 to 52 and discharging the injection material into the ground 100 from the discharge hole 47 of the injection tube 40 through the expanding sheet material 43: FIG. 6 (a),
(6) The injection packers 50 to 52 are moved along the longitudinal direction of the injection tube 40, the injection material is pressurized and injected through the injection packers 50 to 52, and expands from the other discharge holes 47 of the injection tube 40. Steps of discharging the injection material into the ground 100 through the sheet material 43: FIGS. 6B to 6C,
(7) Step of extracting the injection packers 50 to 52 and filling the injection tube 40 with the injection material: FIG.
(8) Step of disposing the rod-shaped core material 70 in the injection tube 40 filled with the injection material: FIG.
(9) A process of attaching an anchor plate 80 and a nut 81 as a fixing material to a surplus length portion exposed to the ground 100 in the core material 70: FIG.
Is included.

  About another structure and operation | movement, it is the same as that of the reinforcing material of 3rd Embodiment. Therefore, also in the reinforcing material of the fourth embodiment, by forming the secondary bulging and fixing body 31 into the reinforcing material, it is possible to increase the bearing resistance force of the reinforcing material against the pulling force, which is relatively small. It is possible to suppress a simple landslide simply and inexpensively. Further, since the pressure injection of the injection material can be performed at the position of any discharge hole, the degree of freedom with respect to the ground condition and material cost can be increased. Furthermore, in the reinforcing material of the fourth embodiment, since the injection material can be discharged into the ground 100 from any one discharge hole 47 of the injection pipe 40 by the injection packers 50 to 52, the innermost discharge is performed. In order to eliminate waste by carrying out in order from the hole, to prevent injection from the ground surface side in order from the discharge hole on the near side, injection material only from any number of discharge holes, such as only one place or only two places The efficiency can be improved and the cost can be reduced by the necessary number of bulges.

<Fifth Embodiment>
In the above-described first embodiment, the injection material is moved in the longitudinal direction of the injection tube 40 through the injection packers 50 to 52, and the injection material is injected under pressure a plurality of times for each discharge hole 47 once. However, in this embodiment, the injection material is repeatedly discharged into the ground 100 for each of the discharge holes 47.

7A, in the same manner as FIG. 5C of the fourth embodiment, the injection tube 40 is disposed in the hole 111 into which the injection material has been injected, and the replacement tubular fixing body 30 is disposed around the injection tube 40. Create.
Next, in FIG. 7B, similarly to FIGS. 6A to 6C of the fourth embodiment, the secondary bulge fixing bodies 31a to 31c are arranged in the longitudinal direction by the injected material injected. A secondary bulging and fixing body 31 having a skewer shape is formed by integration.
Finally, in FIG. 7 (c), similarly to FIGS. 6 (a) to 6 (c) of the fourth embodiment, the tertiary bulging and fixing bodies 32a to 32c are arranged in the longitudinal direction by the injected material. The second fixing body 32 having a skewer shape is formed integrally.

The fixing body in the middle (second position) portion of the replacement tubular fixing body 30 in FIG. 7B is formed by the pressure injection of the second (second) bulging injecting material in FIG. 7B. A secondary bulging and fixing body 31b in the second position is formed including the expanded replacement tubular fixing body 30 ′. The secondary bulging and fixing body 31b further has an outer leakage portion 31b ′ of the secondary bulging and fixing body at the second position. The secondary bulging and fixing body 31 includes the fixing bodies 30 ′, 31b and 31b ′ described above.
Furthermore, by the pressure injection of the third (third) injection material in FIG. 7C, the expanded replacement tubular fixing body 30 ′ and the expanded secondary bulging fixing body 31b ′ are included in the second position. It becomes the tertiary bulging and fixing body 32b. The tertiary bulging and fixing body 32b further has an outer leakage portion 32b ′ of the tertiary bulging and fixing body at the second position. The tertiary bulge fixing body 32 includes all the fixing bodies described above. About another structure and operation | movement, it is the same as that of the reinforcing material of 3rd-4th embodiment.

  When the injection material is repeatedly injected as described above, it is necessary to inject the replacement injection material injected last time while generating a crack, and for that purpose, the hardening before the completion of the previous injection material is completed. Repeat injections at intermediate stages. The judgment criteria are related to various factors, but differ depending on the type of cement used as an injection material. For example, in the case of ordinary Portland cement, it is usually within 12 to 48 hours, and in the case of early strong Portland cement, it is usually within 6 to 24 hours.

  In this embodiment, since the injection material is pressure-injected a plurality of times, the upper surface of the ground 100 (slope ground) is not raised, and the bulging portion can be made larger. While suppressing an increase in cost due to an increase in scale or the like, it is possible to increase a bearing resistance force when reinforcing a landslide of a relatively small slope ground 100.

<Sixth Embodiment>
In the third to fifth embodiments described above, the sheet material 43 is made of cloth, but in the present embodiment, the sheet material 43 is made of an elastomer that can be ruptured by the pressure of the injection material. Both ends of the sheet material 43 are closely fixed to the injection tube 40 by the tightly binding band 45 as in the first embodiment.

In the present embodiment, the sheet material 43 is made of an elastomer such as raw rubber or synthetic rubber whose thickness dimensions and components are adjusted so as to be ruptured by the pressure of the injection material. It is expanded into a spherical shape and expanded to the elastic limit of the elastomer sheet material 43 to be ruptured. Due to the rupture of the sheet material 43, the inner injection material is released in all directions at once with a high pressure.
About another structure and operation | movement, it is the same as that of the reinforcing material of 1st Embodiment. Accordingly, the injection material is gradually discharged in a specific direction from a small area portion such as a blocking member of each discharge hole 47, which was a problem of the prior art, so that the pressure is reduced in the viscous ground 100 or the like. By proceeding along, it is possible to suppress expansion so as to protrude radially in a substantially pulse shape or substantially noise shape in the depth direction.
As a result, the plurality of bulging portions 31a to 31c made of a solidified material of the injection material and the earth and sand in the ground can be formed into a shape similar to a substantially bulbous shape, and the secondary bulging and fixing body. It is possible to provide a method of creating a reinforcing material that increases the bearing resistance force when reinforcing the landslide of a relatively small slope ground 100 by making the shape of 31 a continuous bulb shape of a substantially bulbous shape. Also in this embodiment, when the closing member is in the form of a sleeve, the sheet material may be in the form of a sleeve that is slightly larger than that, and both end portions thereof may be closely fixed to the injection tube 40 by, for example, a binding band. Good. About another structure and operation | movement, it is the same as that of the reinforcing material of 3rd-5th embodiment.

  Examples of the material of the sheet material 43 include polyisoprene (natural rubber, synthetic natural rubber), butadiene / styrene copolymer (styrene butadiene rubber), polybutadiene (butadiene rubber), polychloroprene (chloroprene rubber), and isoprene / isoprene. A polymer (butyl rubber), a butadiene / acrylonitrile copolymer (nitrile rubber), polyurethane (urethane rubber), organic polysiloxane (silicone rubber), or the like can be used. As for the thickness dimension of the sheet material 43, when the sheet material 43 is expanded to the elastic limit and ruptured, if the sheet material 43 is too thin, there is a case where it does not make sense to use the sheet material by rupturing immediately. On the other hand, if the sheet material 43 is too thick, the injection pressure must be increased and the injection amount increased in order to expand and rupture to the elastic limit, and the apparatus becomes unnecessarily large and wasteful. To do. More specifically, for example, when natural rubber, preferably having a hardness of 65 °, is used, the sheet material 43 has a thickness of 1.0 mm or less, so there is a possibility of bursting immediately. And 5.0 mm or less, which is easy to expand and burst.

<Seventh embodiment>
In the above-described third to fifth embodiments, the rubber sleeve 41 and the sheet material 43 are similarly provided for all the discharge holes 47 of the injection tube 40. However, FIGS. 8A, 8B, and 8C are used. In this embodiment shown in FIG. 2, a sheet material (cloth sleeve) is provided for every other installation position of the discharge holes 47. From the discharge hole 47 of the injection tube 40, the injection material is repeatedly discharged under pressure by the injection packers 50 to 52 for each installation position along the longitudinal direction of the discharge hole 47 to form a bulge portion. Then, the secondary radial bulging and fixing body 33 by the second bulging injecting material at the second position is shown in FIG. 1, FIG. 6 (c) and FIG. As shown in FIGS. 1, 7 (c), and (d) of Reference 4, the shape is enlarged so as to protrude radially in a random substantially pulse shape or substantially noise shape in the depth direction. The random secondary bulging and fixing body 33 that is substantially pulse-shaped or substantially noise-like and has a radial radial bulging and fixing body 33 is weaker in bearing resistance than the bulbous secondary bulging and fixing bodies 31a to 31c. In addition, since the bulbous secondary bulging and fixing members 31a and 31c are provided, the total bearing resistance does not become so weak, and a part of the sheet material can be deleted to reduce the cost. About another structure and operation | movement, it is the same as that of the reinforcing material of 3rd-5th embodiment.

  In addition, when a sheet material (cloth sleeve) is provided, water drainage is good, so that the initial strength can be increased. However, even if the sheet material is made of a burstable elastomer, the initial strength can be increased by changing the cement to an early-strength cement. Even in the case of a discharge hole that is not provided, it is possible to prevent the final strength from being lowered.

<Eighth Embodiment>
In the first to seventh embodiments described above, the core material 70 is finally disposed in the injection tube 40. However, in this embodiment, the strength of the injection tube 40 itself is increased so that the injection tube 40 is a reinforcing material. The strength as a core material is provided.
In this embodiment, by providing the injection tube 40 itself with the strength as the core material of the reinforcing material, the arrangement of the core material can be omitted, the construction period can be shortened, and the cost of the core material becomes unnecessary. It is possible to provide a method for producing a reinforcing material that is economical to suppress. About another structure and operation | movement, it is the same as that of the reinforcing material of 1st-7th embodiment. Further, as described above, for example, STK400 of general structural carbon steel pipe steel (STK) defined in the Japanese Industrial Standard (JIS) G3444 standard can be used as the material of the injection pipe 40 in this case.

  As described above, according to each embodiment of the reinforcing material and the production method thereof according to the present embodiment, the injection material and the injection pipe are arranged in the drilled holes, and the injection material is further added before the previous injection material is completely solidified. By injecting under pressure from the injection tube and releasing from the discharge hole, the injection material is discharged into the ground outside the hole that has been drilled so as to break through the previous injection material before solidifying, and in the ground The bulging part is formed by solidifying the injection material together with the earth and sand. Then, when reinforcing a landslide on a relatively small slope ground by creating a bulge, the injection material is surely injected around each reinforcement material to increase the bearing resistance against pulling out. It provides a method for building materials. However, the present invention is not limited to the above-described embodiments, and the injection material is discharged by pressurizing injection from at least one discharge hole so that the previous injection material before solidification is broken through. If it can discharge | release into the ground outside a hole which drilled, you may create a bulging part using things other than an above-described method and structure. More specifically, for example, the rubber sleeve (closing member) 41, the sheet material (cloth sleeve) 43, the filling packers 50 to 52, and the like can be replaced with other members and devices having the same function, Thereby, the reinforcing material may be formed by forming the bulging portion.

DESCRIPTION OF SYMBOLS 10 Casing pipe 11 Rod 20 Injection pipe 30 Replacement tube fixing body (by the injection material for replacement) (Reinforcing material)
30 '(with pressure injection) expanded replacement tubular anchor (reinforcing material)
31 Secondary bulging and fixing body (reinforcing material) (by the second bulging injection material)
31a Secondary bulging and fixing body in the first position (reinforcing material)
31b Secondary bulging and fixing body in the second position (reinforcing material)
31b 'Outer leakage portion (reinforcing material) of second secondary bulging and fixing body
31c Secondary bulging and fixing body in the third position (reinforcing material)
32b An expanded tertiary bulge fixing body (reinforcing material) having a substantially bulbous shape at the second position (by the third injection material),
33 Secondary radial bulge fixing body (by second bulging injection material) 40 Injection pipe (reinforcing material: outer pipe, fixing pipe)
41 Rubber sleeve (occlusion member)
43 Sheet material (cloth sleeve)
43a Sheet material at the first position 43b Sheet material at the second position 43c Sheet material at the third position 45 Binding band (for tightly fixing)
47 (injection tube) injection hole 50 inner tube 51 (longitudinal tip side) injection packer 52 (longitudinal front side) injection packer 57 (inner tube) injection hole 60 (by injection material) inner fixing body (Reinforcing material)
70 Core material (reinforcing material)
80 Anchor plate (fixing material)
81 Nut (fixing material)
100 Ground 111 (Drilled) hole.

Claims (6)

An injection pipe is arranged in a hole drilled in the ground, and is a reinforcing material created on the ground by an injection material pressurized and injected into the injection pipe,
The injection tube has a plurality of discharge holes spaced in the longitudinal direction;
Including a region around the at least one discharge hole, such that the expansion material has a diameter larger than a diameter of the hole drilled in the ground by the injection material discharged from the discharge hole. A sheet material that covers a region around the injection tube in a tubular shape, and that both end portions in the longitudinal direction of the injection tube are closely fixed to the injection tube;
Is provided,
In the ground, the injection material expands in the hole formed in the ground from the at least one discharge hole at the time of the pressure injection, and is outside the hole formed in the ground. It is discharged into the ground, and at least one bulging part is created by solidifying the injection material in the ground together with the earth and sand in the ground,
The bulging portion in the ground, the sheet material, and the injection pipe are integrally coupled by the solidification of the injection material,
A method of creating a reinforcing material,
A process of drilling holes in the ground;
Placing the injection tube in the hole;
The injection material is pressurized and injected into the injection tube, and the injection material is expanded from the at least one discharge hole of the injection tube in the hole formed in the ground material, and the drilling hole is formed. A process that is released into the ground outside the hole,
After arranging the injection tube in the hole of the ground, including a step of arranging an injection packer in the injection tube,
In the step of discharging the injection material into the ground from the at least one discharge hole of the injection pipe, the injection is carried out and the sheet material is transmitted from the at least one discharge hole into the ground. Release the material,
Injecting the injection material before placing the injection tube in the hole drilled in the ground;
After the step of discharging the injection material into the ground, extracting the injection packer and filling the injection material into the injection tube;
Of reinforcing material including At least one discharge hole of the injection tube is closed at normal pressure, and is closed by a blocking member that discharges the injection material at the time of pressurized injection,
The method for producing a reinforcing material according to claim 1, wherein the sheet material is expanded by the injection material discharged through the at least one closing member. The method for creating a reinforcing material according to claim 2 , wherein the position of at least one closing member covered with the sheet material is a discharge hole on the most surface side of the injection pipe. Said sheet material, said well fluid components of the injection material, any one of claims 2-3, at least a portion of the solid components other than the liquid component which is formed by the water permeability of the fabric having a passable stitches A method for creating a reinforcing material as described in 1. The method for producing a reinforcing material according to any one of claims 2 to 3, wherein the sheet material is formed of an elastomer that is ruptured when the pressure of the injection material becomes a value equal to or greater than an expansion limit. The method for producing a reinforcing material according to any one of claims 2 to 5, wherein the sheet material is provided every other discharge hole of the injection tube.