JP2009191582A - Reinforcing member used for ground reinforcement, method for ground reinforcement, and ground reinforcement structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a space generated between a hole surface and a bag body in a method for reinforcing a ground by inserting the bag body into a hole formed by drilling the ground and by press-injecting a grout into the bag body. <P>SOLUTION: A reinforcing member 1 is fixed to a core material 20 which is inserted into a bag body 10 in a closed state of both end parts so that a block space 50 is formed inside of the cylindrical bag body 10, and the end part of the bag body 10 is fixed to the core material 20 by folding the end part 10A at the tip side of the core material 20 of the bag body 10 inward and by tightening the folded end part 10A with a restraining member 40A by the core material 20. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  According to the present invention, a reinforcing member formed by fixing a cylindrical bag body to a core material inserted through the bag body in a state where both ends thereof are closed so as to form a closed space therein is drilled in the ground. The present invention relates to a reinforcing member used in a method for reinforcing a ground by inserting the bag into a hole formed and filling a grout into a bag body, and a ground reinforcing method and a reinforcing structure using the reinforcing member.

  Conventionally, as a method of reinforcing an unstable ground such as a slope, a hole is formed by drilling the ground, and a grout is filled in the hole, and a core material such as a reinforcing bar is embedded in the filled grout. The method is used. In this way, in the method of filling the grout into the hole, in order to balance the grout and the ground pressure, the grout must be filled while applying pressure. However, if the grout is filled while applying pressure, the grout flows out to the ground, which is uneconomical.

  Therefore, for example, in Patent Document 1, a plurality of cylindrical bags having coupling couplers attached to both ends are inserted into holes formed in the ground while coupling couplers are coupled by a coupling ring. A method is described in which grout is filled into a bag while applying pressure.

The applicants of the present application also insert a water-permeable bag body attached to a reinforcing material into a hole formed by excavating the ground as described in Patent Document 2, for example, A method has been proposed in which grout is filled while pressure is applied to the inside of the bag, and the grout is filled in the holes after the grout in the bag is cured. According to these methods, even if the grout is filled while applying pressure, since the grout is filled in the bag, it can be prevented from flowing to the ground.
Japanese Patent Application Laid-Open No. 2003-342943 JP 2006-188845 A

  However, in the method described in Patent Document 1, since the coupler exists at the front end portion of the bag body and the connecting portion between the bag bodies, even if the grout is filled while applying pressure, the grout does not reach the outer peripheral portion of the coupler. It does not spread and voids are generated in the holes.

  Also in Patent Document 2, for example, as shown in FIG. 19 of the same document, even if the bag body is filled with grout, the grout does not reach the outer peripheral side of the fixed belt, and the tip of the hole and the bag body. There is a gap in the hole such as between the two or between the plurality of bags.

  As described above, when a void is generated in the hole, the ground is not supported in this portion, and sufficient reinforcing strength cannot be obtained. The present invention has been made in view of the above problems, and its purpose is to insert a bag body into a hole formed by drilling the ground and pressurize and fill the grout into the bag body. In the method of reinforcing the above, the gap formed between the hole surface and the bag body is reduced.

  The reinforcing member used for ground reinforcement according to the present invention is formed by fixing a cylindrical bag body to a core material inserted through the bag body in a state where both ends thereof are closed so as to form a closed space inside. The reinforcing member is used in a construction method for reinforcing the ground by inserting a reinforcing member into a hole drilled in the ground and filling the closed space with a curable filler. The end of the core is folded back inward, and the folded portion is fastened to the core by a restraining member, whereby the end of the bag is fixed to the core. It is characterized by that.

  Further, the reinforcing member used for ground reinforcement of the present invention is inserted into the plurality of bag bodies in a state in which the plurality of cylindrical bag bodies are closed at both ends so as to form closed spaces therein. The reinforcing member used for the method of reinforcing the ground by inserting a reinforcing member fixed to the core material to be inserted into a hole cut in the ground and filling the closed space with a curable filler. In the pair of bag bodies adjacent to each other along the core material, the other bag body side end portion of one bag body is folded inward, and the folded portion is an end of the other bag body. The ends adjacent to each other of the pair of bag bodies are fixed to the core member by being fastened to the core member by a restraining member from the outside of the portion.

  Further, the reinforcing member used for ground reinforcement of the present invention is inserted through the bag body in a state in which both ends and intermediate portions of the cylindrical bag body are closed so as to form a plurality of closed spaces inside. The reinforcing member used for the method of reinforcing the ground by inserting a reinforcing member fixed to the core material into a hole cut in the ground and filling the closed space with a curable filler. The intermediate portion of the bag body is folded to the outside, and the folded portion is fastened to the core material by a restraining member from the outside, whereby the intermediate portion of the bag body is fixed to the core material. Further, the folded portion of the bag body is folded outward in the opposite direction.

  In the reinforcing member, a water stop member is attached to an outer periphery of a portion of the core member to which the bag body is fixed, and the bag body is fastened to the core member through the water stop member. Good.

  In addition, an injection pipe may be provided that passes through the inside of the bag body or whose tip reaches the inside of the bag body and opens at a plurality of locations in the same closed space formed inside the bag body. .

In addition, a plurality of injection pipes each having a distal end opened in a plurality of closed spaces formed inside the bag body, and the plurality of closed spaces are filled with the curable filler through the plurality of injection pipes. It may include an injection pipe that is inserted into the plurality of closed spaces formed inside the plurality of bag bodies and opens into the plurality of closed spaces, and is inserted into the plurality of closed spaces through the injection pipes. The curable filler may be filled.
Furthermore, you may provide the protective cap attached so that the edge part of the front end side of the said core material of the said bag body might be covered.

  The ground reinforcement construction method of the present invention includes a step of drilling the ground, a step of inserting the reinforcing member into the hole formed by the drilling, and a closed space formed by the bag body. Filling with a curable filler.

  Further, the ground reinforcing method of the present invention is a method of reinforcing the ground using the above-mentioned reinforcing member, and the step of drilling the ground, and the reinforcing member in the hole formed by the drilling And a step of filling a plurality of closed spaces formed by the bag with a curable filler, and in the step of filling the curable filler, the tip side of the core material A curable filler is sequentially filled from the closed space.

  Further, the ground reinforcing structure of the present invention is a structure for reinforcing the ground using the reinforcing member, wherein the reinforcing member is inserted into a hole formed by drilling the ground, and the bag body The formed enclosed space is filled with a curable filler.

  According to the present invention, since the end portion of the bag body is folded back and fastened to the core material by the restraining member at the folded portion, the restraining member fixes the bag body to the core material in the closed space formed by the bag body. It becomes. For this reason, the grout is filled also on the outer peripheral side of the restraining member, and it is possible to suppress the occurrence of a void in the hole at the fixing portion of the bag body by the restraining member.

  The reinforcing member used for the ground reinforcement of the present invention forms a hole by drilling the ground in an unstable ground such as a slope, and both ends thereof are fixed to the core material in the hole, and the closed space is formed inside. This is a reinforcing member used in a method of reinforcing the ground by inserting a reinforcing member to which a bag body is attached and filling the bag body with grout.

<First embodiment>
Hereinafter, a first embodiment of a reinforcing member of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a reinforcing member 1 of the present embodiment, (A) is a sectional view in the axial direction of the core member 20, (B) is an enlarged sectional view of part B in (A) (C) is in (A). It is an expanded sectional view of the C section. The reinforcing member 1 is formed by fixing a cylindrical bag body 10 to a core member 20. The bag body 10 is a flexible member formed in a cylindrical shape with both ends opened. For example, a ramid or non-woven fabric made of hemp or synthetic fiber having flexibility and wear resistance is used as an aramid. What mixed the reinforcement fiber with high tensile strength, such as a thread | yarn and carbon fiber, etc. can be used.

  As shown in FIG. 1A, a core material 20 made of, for example, a deformed reinforcing bar is inserted into the bag body 10, and both end portions of the bag body 10 are connected to the core material 20 at both ends thereof. The opening is fixed in a closed state. Thereby, the closed space 50 is formed inside the bag body 10. An injection pipe 21 extends along the core member 20, and the tip of the injection pipe 21 opens into a closed space 50 formed by the bag body 10.

  As shown in FIG. 1B, a water stop member 30A made of putty or the like is attached to the tip of the core member 20, for example. And the front-end | tip part 10A of the bag body 10 is turned back inside, and the front-end | tip turned back from the inner side of the bag body 10 in the state in which the part turned back on the outer periphery of the water stop member 30A attached to the core material 20 was located. The part 10A is fixed to the core member 20 by tightening the binding member 40A such as a binding wire or belt from the outer peripheral side. As a result, the restraining member 40A fixes the distal end portion 10A of the bag body 10 in the closed space 50 formed by the bag body 10.

  Moreover, as shown in FIG.1 (C), the water stop member 30B is attached to the outer peripheral surface also in the location where the rear-end part 10B of the bag 10 of the core material 20 is fixed. And the rear-end part 10B of the bag body 10 is being fixed to the core material 20 by tightening the bag body 10 from the outer peripheral side with the restraining member 40B in the state which the inner surface located in the outer periphery of the water stop member 30B.

The bag body 10 can be attached to the core member 20 as described below.
FIG. 2 is a view for explaining a method of attaching the bag body 10 to the core member 20.
As shown in FIG. 2A, when attaching the bag body 10 to the core member 20, the water stop members 30A and 30B are attached to the portion of the core member 20 where the bag member 10 is fixed in advance.

  And as shown to the same figure (B), even the part to which the water stop member 30A of the core material 20 was attached is inserted in the bag body 10, and the bag body 10 is made into the core material 20 from the outer peripheral side by the restraining member 40A. Tighten and fix.

  Next, as shown in FIG. 2C, the bag body 10 is folded back from the side opposite to the side fixed to the core material 20 of the bag body 10 while the bag body 10 is folded to the rear end side. It extends along the core material 20 toward.

Next, as shown in FIG. 4D, in the state where the inner peripheral surface of the rear end portion 10B of the bag body 10 is positioned around the water stop member 30B, the restraint member 40B The rear end portion 10B is fastened and fixed to the core member 20.
Through the above steps, both ends of the bag body 10 can be fixed to the core member 20 as shown in FIG.

  When reinforcing the ground using the reinforcing member 1, the ground is drilled to form a hole, and the reinforcing member 1 is inserted into the hole from the side where the bag body 10 is attached. Then, the grout is filled into the closed space 50 through the injection pipe 21 while applying pressure.

  FIG. 3 is a cross-sectional view showing the bag body 10 in a state where the grout 60 is filled in the closed space 50. As shown in the figure, in the present embodiment, the tip of the bag body 10 is folded inward, and the folded portion is fixed to the water stop member 30A attached to the core member 20 by the restraining member 40A. The restraining member 40 </ b> A is provided inside the bag body 10. For this reason, when the grout 60 is filled in the bag body 10, the grout 60 is also filled around the restraining member 40A, and the bag body 10 is not restrained from being deformed by the restraining member 40A. Can be expanded to the outer peripheral side by the filling pressure. As a result, as shown in FIG. 5, the bag body 10 filled with the grout 60 expands even at the tip thereof until it contacts the inner wall surface of the hole 100 </ b> A, and almost no void is generated in the hole 100 </ b> A.

  Further, since the water-stop members 30A and 30B are attached to the outer periphery of the core member 20 and the bag body 10 is attached to the core member 20 via the water-stop members 30A and 30B, the grout 60 is pressurized and filled. It is possible to reliably prevent the grout 60 from leaking out of the bag body 10.

  In addition, in said embodiment, although the rear-end part 10B of the bag body 10 shall be fixed to the core material 20 by clamp | tightening with the restraining member 40B from an outer peripheral side, it is not restricted to this, An end part is obstruct | occluded. The fixing method is not limited as long as it can be fixed.

  Further, when inserting the reinforcing member 1 into the hole 100A, as shown in FIG. 4, it is preferable to previously fit a protective cap 70 made of rubber or the like at the tip thereof. Thereby, when the reinforcing member 1 is inserted into the hole 100A, even if the bag body 10 interferes with the inner peripheral surface of the hole 100A, the protective cap 70 protects the distal end portion of the bag body 10; Can be prevented from being damaged. When the grout is filled in the bag body 10, as shown in FIG. 5A, the protective cap 70 extends as the bag body 10 expands, and is closely attached to the bag body 10. It will be in close contact with the inner surface of the hole 100 </ b> A via 70.

  In addition, as the protective cap 70, for example, a member obtained by molding a plastic very thinly can be used. In such a case, when the grout is filled in the bag body 10, the bag body 10 gradually increases in diameter from the intermediate portion toward the distal end direction of the core member 20, as shown in FIG. Thus, the protective cap 70 is pushed out to the distal end side by the force of expanding the diameter of the bag body 10 and is detached. The protective cap 70 is left in the hole 100A. However, since the protective cap 70 is made of plastic and is very thin as described above, the bag body 10 expands when the grout 60 is filled. Is sandwiched between the bag body 10 and the hole 100A and crushed. For this reason, even if the protective cap 70 is left in the hole 100A, no gap is generated in the hole 100A.

<Second Embodiment>
Although 1st Embodiment demonstrated the case where the one bag body was fixed to the core material, when the full length of a hole is long, it is necessary to fix a some bag body to a core material. Hereinafter, an embodiment when two bags are attached to the core will be described. In the following description, the same components as those in the above embodiment are denoted by the same reference numerals and description thereof is omitted.

  FIG. 6 shows the reinforcing member 2 in which a plurality of bag bodies 10 and 110 are attached to the core material 20, (A) is an axial cross-sectional view of the core material 20, and (B) is a portion B in FIG. It is an expanded sectional view. As shown in the figure, the first bag body 10 and the second bag body 110 are continuously fixed to the core member 20 from the front end side. Water stop members 30A, 30B, and 30C are attached to the core member 20. These bag bodies 10 and 110 are restraining members 40A at positions where both ends of the bag bodies 10 and 110 are attached to the water stop members 30A, 30B, and 30C, respectively. , 40B and 40C are fixed to the core member 20 by being tightened from the outer peripheral side. Thereby, the 1st and 2nd bag bodies 10 and 110 form closed space 50 and 150 inside, respectively. The first and second injection pipes 21 and 121 extend along the core material 20 from the rear end side of the core material 20, and the tip of the first injection pipe 21 is formed by the first bag body 10. The end of the second injection pipe 121 opens into the closed space 150 formed by the second bag body 110.

  The distal end portion 10A of the first bag body 10 is fixed to the distal end of the core material 20 by a method similar to the method of fixing the distal end portion 10A of the bag body 10 to the core material 20 in the first embodiment. The rear end portion 110B of the second bag body 110 is formed by the same method as the method of fixing the rear end portion 10B of the bag body 10 to the core member 20 in the first embodiment.

  Further, as shown in FIG. 6B, the front end portion 110A of the second bag body 110 is folded inward, and the folded front end portion 110A is positioned on the outer periphery of the rear end portion 10B of the first bag body 10. is doing. Then, the rear end portion 110A of the second bag body 110 is fastened to the core member 20 by the restraining member 140A from the outside of the rear end portion 10B of the first bag body 10, thereby The end portion 10 </ b> B and the distal end portion 110 </ b> A of the second bag body 110 are fixed to the core member 20. Thereby, the restraining member 140A fixes the distal end portion 110A of the second bag body 110 in the closed space 150 formed by the second bag body 110.

FIG. 7 is a view for explaining a method of attaching the plurality of bag bodies 10, 110 to the core member 20.
First, as in the first embodiment, the first bag body 10 is attached to the core member 20, and water is stopped from the front end of the core member 20 in the second bag body 110 as shown in FIG. The part to which the member 30B is attached is inserted. Then, with the end portion 110A of the second bag body 20 superimposed on the rear end portion 10A of the first bag body 10, the bag bodies 10 and 110 are fastened to the core member 20 by the restraining member 140A from the outer peripheral side. .

Next, as shown in FIG. 2B, the second bag body 110 is folded back toward the right side in the figure from the end opposite to the side fixed to the core member 20.
Next, as shown in FIG. 3C, the rear end portion 110B of the second bag body 110 is positioned on the outer periphery of the water stop member 30C attached to the core member 20. And as shown in the figure (D), the rear-end part 110B of the 2nd bag body 110 is clamped and fixed to the core material 30C by the restraint member 140B from the outer peripheral side. Thereby, the two bag bodies 10 and 110 can be attached to the core material 20, and more than two bag bodies can be attached to the core material by repeating the above steps.

  When the ground is reinforced using the reinforcing member 2, the ground is drilled to form a hole as in the first embodiment, and the reinforcing member 2 is inserted into the hole of the first bag body 10 in the hole. Insert from the fixed side. Then, the grout 60 may be filled in the closed spaces 50 and 150 through the first and second injection pipes 21 and 121 while applying pressure.

  At this time, the filling operation of the grout 60 into the closed spaces 50 and 150 formed by the bag body may be sequentially performed from the closed space 50 formed on the distal end side of the core member 20. When the grout 60 is filled in the bags 50, 150, moisture contained in the grout 60 oozes out from the bags 50, 150 into the hole, but by sequentially filling the grout 60 from the closed space 50 on the tip side, This moisture is driven to the surface side through the hole. Thereby, it can prevent that a water | moisture content remains in a hole, and can prevent that a space | gap arises in a hole.

  FIG. 8 is a cross-sectional view showing the bag bodies 10 and 110 in a state where the closed spaces 50 and 150 are filled with the grout 60. As shown in the figure, according to this embodiment as well, as in the first embodiment, the front end portion of the first bag body 20 is formed on the inner peripheral surface of the hole 100A without generating a gap at the front end portion of the hole 100A. It will be in close contact. Further, similarly, the front end portion of the second bag body 110 is folded inward, and the folded portion is fixed to the water stop member 30B attached to the core member 20 by the restraining member 140A. It is provided inside the second bag body 110. Therefore, when the grout 60 is filled in the second bag body 110, the grout 60 is also filled around the restraining member 140A, and the second bag body 110 restrains deformation by the restraining member 140A. Without expansion, it can be expanded to the outer peripheral side by the filling pressure of the grout 60. As a result, the second bag body 110 filled with the grout 60 is in contact with the rear end portion of the first bag body 10 and expands until it comes into contact with the inner wall surface of the hole 100A, and almost no void is generated in the hole 100A. .

  According to the present embodiment, in addition to the effects obtained in the first embodiment, the opposing end surfaces of the plurality of bag bodies 10 and 110 are in close contact with each other, and the plurality of bag bodies 10 and 110 have no gaps. It will contact | abut to the internal peripheral surface of 100A. For this reason, it becomes possible to support the ground reliably between the bags 10 and 110.

  In the present embodiment, a case where a hole that does not penetrate the ground is drilled and a reinforcing member is inserted into the hole to reinforce the ground is not limited to this, and a through hole is provided in the ground. Even when a reinforcing member with a plurality of bags attached in the hole is inserted and the grout is filled, the same effect can be obtained by applying the bag attaching method of this embodiment. can get.

  Moreover, although this embodiment demonstrated the case where a several obstruction | occlusion space was formed using a some bag body, it is not restricted to this, It is also possible to form a some obstruction | occlusion space using one bag body. is there. In such a case, as shown in FIG. 9A, the water stop members 30A, 30B, and 30C are attached to the core member 20 at intervals in advance. And as shown in FIG.9 (B), even the part to which the water stop member 30A of the core material 20 was attached is inserted in the bag body 210, and the bag body 210 is made into the core material 20 from the outer peripheral side by the restraining member 40A. Tighten and fix.

Next, as shown in FIG. 9C, the bag body 210 is folded back from the side opposite to the side fixed to the core material 20 of the bag body 210, and the bag body 210 is moved to the rear end side of the core material 20. It extends along the core material 20 toward.
Next, as shown in FIG. 9D, the bag body 210 is fastened and fixed to the core member 20 by the restraining member 40B from the outer peripheral side of the bag body 210 at the position where the water stop member 30B is attached.

  Next, as shown in FIG. 9E, the portion extending to the rear end side of the bag body 210 is folded back to the front end side, and the core is fixed by the restraining member 140A from the outer peripheral side of the portion fixed by the restraining member 40B of the bag body 210. Fasten to material 20 and fix.

  Next, as shown in FIG. 9 (F), the bag body 210 is directed toward the rear end side of the core member 20 while turning back the portion extending from the portion fixed by the restraining member of the bag body 210 to the front end side. It extends along the core material 20.

Next, as shown in FIG. 9G, the bag body 210 is fastened and fixed to the core member 20 by the restraining member 140B from the outer peripheral side of the bag body 210 at the position where the water stop member 30C is attached.
Through the above steps, the two closed spaces 50 and 150 can be formed by one bag body 210, and three or more closed spaces can be formed by one bag body by repeating the above steps. Is possible.

  In the above-described embodiment, the first and second injection pipes 21 and 121 having their respective ends opened in the plurality of closed spaces 50 and 150 along the core member 20 are provided. The grout 60 is filled in the plurality of closed spaces 50, 150. However, the present invention is not limited to this, and one injection pipe is provided so as to pass through the plurality of closed spaces 50, 150. It is good also as providing a groove | channel etc. in an injection pipe so that it may open inside. Even with such a configuration, the grout can be filled into the closed spaces 50 and 150 through the injection pipe.

  Further, in each of the above-described embodiments, the case where the injection pipes 21 and 121 have only one opening in the same closed space 50 and 150 has been described. However, the present invention is not limited to this, for example, as illustrated in FIG. The injection pipes 21 and 121 may be provided with openings (V-shaped grooves 21A in the example of FIG. 10) at a plurality of locations in the same closed space 50 so as to be opened. As a result, even if the closed space 50 is long, the grout can be evenly filled in the closed space 50.

The reinforcement member by which a bag body is fixed to a core material by the method of this embodiment is shown, (A) is a sectional view of the axial direction of a core material, (B) is an expanded sectional view of the B section in (A). C) is an enlarged sectional view of a portion C in (A). It is a figure for demonstrating the method of attaching a bag body to a core material. It is sectional drawing which shows the bag body of the state with which grout was filled in the obstruction | occlusion space. It is a figure which shows the state which attached the protective cap to the front-end | tip of a core material, (A) is sectional drawing of the axial direction of a core material, (B) is an expanded sectional view of the B section in (A). (A) is a figure which shows the state which filled grout in the enclosed space of the reinforcement member which attached the protective cap which has a stretching property, (B) is in the enclosed space of the reinforcement member which attached the plastic-made thin protective cap. It is a figure which shows the state filled with grout. The reinforcement member by which a several bag body is attached to a core material is shown, (A) is an axial sectional view of a core material, (B) is an expanded sectional view of the B section in (A). It is a figure for demonstrating the method of attaching a some bag body to a core material. It is sectional drawing which shows the bag body of the state with which grout was filled in the obstruction | occlusion space. It is a figure for demonstrating the method of forming several closed space with one bag body. It is a figure for demonstrating the method using the injection | pouring pipe opened in several places in the same obstruction | occlusion space.

Explanation of symbols

1, 2, Reinforcement member 10, 110, 210 Bag body 20 Core material 21, 121 Injection pipe 30A, 30B, 30C Water stop member 40A, 40B, 140A, 140B Restraint member 50, 150 Closed space 60 Grout 70 Protective cap 100 Ground 100A Hole

Claims (11)

A cylindrical bag body is provided with a reinforcing member fixed to a core material inserted through the bag body in a state where both ends thereof are closed so as to form a closed space therein, in a hole drilled in the ground. The reinforcing member used in a method of inserting and reinforcing the ground by filling a curable filler in the enclosed space,
The end of the bag body on the front end side of the core member is folded inward, and the folded portion is fastened to the core member by a restraining member, whereby the end portion of the bag body is attached to the core member. A reinforcing member used for ground reinforcement characterized by being fixed. A plurality of cylindrical bag bodies each having a reinforcing member fixed to a core member inserted through the plurality of bag bodies in a state in which both end portions thereof are closed so as to form a closed space therein, The reinforcing member used in a construction method for reinforcing the ground by inserting into a drilled hole and filling the closed space with a curable filler,
In the pair of bags adjacent to each other along the core material,
The other bag body side end of one bag body is folded inward, and the folded portion is fastened to the core member by a restraining member from the outside of the other bag body end. The reinforcement member used for ground reinforcement characterized by the edge part which mutually adjoins the bag body being fixed to the said core material. A cylindrical bag body is provided with a reinforcing member that is fixed to a core material that is inserted through the bag body in a state where both end portions and intermediate portions thereof are closed so as to form a plurality of closed spaces therein. The reinforcing member used in a method of reinforcing the ground by inserting into a hole, and filling the closed space with a curable filler,
The intermediate portion of the bag body is folded to the outside, and the folded portion is fastened to the core material by a restraining member from the outside, whereby the intermediate portion of the bag body is fixed to the core material, The reinforcing member used for ground reinforcement, wherein the folded portion of the bag body is folded outward in the opposite direction.   The water stop member is attached to the outer periphery of the portion to which the bag body of the core material is fixed, and the bag body is fastened to the core material through the water stop member. The reinforcing member according to any one of 1 to 3.   The inside of the bag body is inserted, or the tip reaches the inside of the bag body, and includes injection pipes that open at a plurality of locations in the same closed space formed inside the bag body. The reinforcing member according to any one of claims 1 to 4. A plurality of injection pipes each having a distal end opened in a plurality of closed spaces formed inside the bag body,
The reinforcing member according to claim 2 or 3, wherein the curable filler is filled into the plurality of closed spaces through the plurality of injection pipes.   A plurality of closed spaces formed inside the plurality of bags are inserted into the plurality of closed spaces, and an injection pipe that opens into the plurality of closed spaces is provided. The curable filling is filled into the plurality of closed spaces through the injection pipes. The reinforcing member according to claim 2, wherein the reinforcing member is filled with a material.   The reinforcing member according to claim 1, further comprising a protective cap that is attached so as to cover an end of the bag body on a front end side of the core member. A method of reinforcing the ground using the reinforcing member according to claim 1,
Drilling the ground; and
Inserting the reinforcing member into the hole formed by the drilling; and
Filling a curable filler in a closed space formed by the bag body, and a ground reinforcement construction method characterized by comprising: A method of reinforcing the ground using the reinforcing member according to claim 2,
Drilling the ground; and
Inserting the reinforcing member into the hole formed by the drilling; and
Filling a curable filler into a plurality of closed spaces formed by the bag body, and
In the step of filling the curable filler, the ground reinforcing method is characterized in that the curable filler is sequentially filled from the closed space on the tip side of the core material. A structure that reinforces the ground using the reinforcing member according to claim 1,
A ground reinforcing method, wherein the reinforcing member is inserted into a hole formed by drilling the ground, and a curable filler is filled in a closed space formed by the bag.