JP2023180064A - Reinforcement unit for hollow columnar object and reinforcement method for hollow columnar object - Google Patents

Abstract

To provide a reinforcement unit for a hollow columnar object in a new structure and a reinforcement method for the hollow columnar object with the reinforcement unit.SOLUTION: A reinforcement unit 1 for reinforcing a hollow columnar object from the inside of the hollow columnar object, comprises: a reinforcement member 20 in a cylindrical shape arranged inside of the hollow columnar object; a plurality of bag members 40 arranged in an inside space of the reinforcement member; a partition member 30 separating the inside space of the reinforcement member into a plurality of individual spaces where each of the plurality of bag members is arranged. The partition member extends in an axial direction of the reinforcement member. The reinforcement member is allowed to be deformed so as to closely contact an inner wall of the hollow columnar object by expansion of each of the plurality of bag members. Each of the plurality of expanded bag members extends in the axial direction of the reinforcement member.SELECTED DRAWING: Figure 13

Description

The present invention relates to a reinforcing unit for a hollow columnar object and a method for reinforcing a hollow columnar object.

Existing hollow pillars (e.g. lighting poles, streetlights, telephone poles, signal poles, signposts, curved mirrors, etc.) are installed outdoors, so they are exposed to sunlight, wind and rain, and deteriorate over time. . Deteriorated hollow columns may bend or collapse, causing secondary damage such as physical damage or human damage. Therefore, it is necessary to periodically replace, repair, and reinforce the existing hollow columns.

The hollow columnar object is installed with a part of it buried underground. The number of existing hollow columnar objects installed is large. Therefore, it is not easy to replace all the existing hollow columns. Therefore, it is necessary to repair and extend the life of existing hollow pillars.

The method for reinforcing a hollow columnar object disclosed in Patent Document 1 reinforces the hollow columnar object using a reinforcing unit placed inside the hollow columnar object. The reinforcing unit includes a balloon body inside a cylindrical reinforcing sheet (high-strength fiber sheet). In the reinforcing method, first, the reinforcing sheet is impregnated with an adhesive. The reinforcing unit is then placed at the intended reinforcing position inside the hollow column. Air is then forced into the balloon body inside the reinforcing sheet. The reinforcing sheet is pressed against the inner wall of the hollow pillar by the balloon body expanded with air. The pressed reinforcing sheet is adhered to the inner wall of the hollow pillar by the adhesive impregnated into the reinforcing sheet. Next, the inside of the balloon body is filled with a fluid solidifying material (mortar). The hollow columnar object is reinforced from the inside of the hollow columnar object with an adhesive reinforcing sheet and a solidified fluid solidified material.

The method for reinforcing a hollow columnar object disclosed in Patent Document 2 reinforces the inside of the hollow columnar object using a plurality of rod-like members. In the reinforcement method, first, a plurality of rod-like members are evenly arranged inside the hollow columnar object using a special jig. Next, a fluid solidified material is placed inside the hollow columnar object in which the rod-like member is placed. By solidifying the fluid solidifying material, the hollow columnar object is reinforced. However, this reinforcing method requires complicated work such as arranging the rod-shaped members. Further, in this reinforcing method, since the hollow columnar object must be reinforced from the inside bottom surface, it is difficult to reinforce only the reinforcement position (for example, the middle position of the hollow columnar object) depending on the purpose.

Japanese Patent Application Publication No. 2014-125738 Japanese Patent Application Publication No. 2010-090563

An object of the present invention is to provide a reinforcing unit for a hollow columnar object with a novel structure, and a method for reinforcing a hollow columnar object using this reinforcing unit.

A reinforcing unit for a hollow columnar object according to the present invention is a reinforcing unit for reinforcing a hollow columnar object from inside the hollow columnar object, and includes a cylindrical reinforcing member disposed inside the hollow columnar object, and an inner part of the reinforcing member. It has a plurality of bag members disposed in the space, and a partition member that divides the inner space of the reinforcing member into a plurality of individual spaces in which the plurality of bag members are respectively disposed, and the partition member The reinforcing member extends in the axial direction of the reinforcing member, and the reinforcing member is deformable so as to be in close contact with the inner wall of the hollow columnar object by expanding each of the plurality of pouch members, and each of the plurality of inflated pouch members extends in the axial direction of the reinforcing member. It is characterized by extending in the direction.

According to the present invention, it is possible to provide a reinforcing unit for a hollow columnar object with a novel structure and a method for reinforcing a hollow columnar object using this reinforcing unit.

FIG. 1 is a schematic perspective view showing an embodiment of a reinforcing unit for a hollow columnar object according to the present invention. FIG. 2 is a schematic cross-sectional view of the reinforcing unit in FIG. 1. FIG. FIG. 2 is a cross-sectional view taken along line AA of the reinforcing unit in FIG. 1; FIG. 3 is a schematic diagram of two joined sheets constituting the reinforcing unit. It is a schematic perspective view of the unit main body which comprises the said reinforcement unit. It is a schematic perspective view of the core material inserted into the said unit main body. FIG. 3 is a schematic perspective view of the unit main body showing how a core material is arranged in the unit main body. FIG. 3 is a schematic perspective view of the unit main body showing how a bag member is arranged in the unit main body. FIG. 9 is a sectional view taken along the line BB of FIG. 8 in which a core material and a bag member are arranged in the unit body. FIG. 3 is a schematic cross-sectional view of the hollow columnar object showing a state after a working hole is formed in the hollow columnar object. FIG. 3 is a schematic cross-sectional view of the hollow columnar object showing a state in which the unit main body is disposed inside the hollow columnar object. FIG. 3 is a schematic cross-sectional view of the hollow columnar object showing a state in which the bag member is filled with gas and the reinforcing member is pressed against the inner wall of the hollow columnar object. FIG. 13 is a schematic cross-sectional view of a hollow columnar object showing a state in which the bag member of FIG. 12 is filled with a fluid solidifying material. FIG. 14 is a sectional view taken along the line GG of the hollow columnar object in FIG. 13; FIG. 7 is a horizontal sectional view of a reinforced hollow columnar object showing another embodiment of the hollow columnar object reinforcement unit according to the present invention. FIG. 7 is a horizontal sectional view of a reinforcing unit showing a modification of the reinforcing unit for a hollow columnar object according to the present invention. FIG. 7 is a horizontal sectional view of a reinforcing unit showing another modification of the reinforcing unit for a hollow columnar object according to the present invention. FIG. 7 is a horizontal sectional view of a reinforcing unit showing still another modification of the reinforcing unit for a hollow columnar object according to the present invention.

Hereinafter, embodiments of a hollow columnar reinforcement unit (hereinafter referred to as "this unit") and a hollow columnar reinforcement method (hereinafter referred to as "this method") according to the present invention will be described with reference to the drawings. do. In each figure, the same members and elements are designated by the same reference numerals, and redundant explanations will be omitted.

In addition, in the following description, "vertical direction" is the vertical direction in the state where a hollow columnar object is installed on the ground. That is, downward is the direction of gravity, and upward is the opposite direction of downward. Further, the "radial direction" is a direction outward from the center of the horizontal cross section when the hollow columnar object is installed on the ground.

A "hollow columnar object" is a columnar structure that has a space inside, such as a lighting pole, a streetlight, a telephone pole, a signal pole, a sign pole, a curved mirror, etc., for example. In the embodiment described below, the contents of the present invention will be explained using a lighting column as an example of a hollow columnar object.

The lighting pillars are made of steel. The illumination column has a cylindrical shape and has an inner diameter that is approximately the same from the top end to the bottom end. Lighting poles are installed outdoors on the ground along roads, in parking lots, parks, etc. The lower ends of the lighting columns will be hardened with concrete and buried underground. That is, a portion of the lower end of the lighting column is fixed to the ground together with concrete. The lighting column is heavier at the top because the lighting equipment is placed on the upper side. Therefore, the lower side must be firmly fixed to the ground.

●Reinforcement unit for hollow columnar objects●
First, an embodiment of this unit will be described.

●Configuration of Reinforcement Unit FIG. 1 is a schematic perspective view showing an embodiment of this unit. For convenience of explanation, this figure shows a state in which the bag member is filled with gas.
FIG. 2 is a schematic cross-sectional view of the unit shown in FIG.
FIG. 3 is a cross-sectional view of the unit shown in FIG. 1 taken along the line AA.

This unit 1 is placed at a targeted reinforcement location inside the illumination pillar P (see FIG. 10), and reinforces the strength of the illumination pillar P from the inside. This unit 1 includes a packaging member 10, a reinforcing member 20, a partition member 30, and a bag member 40.

The packaging member 10 includes a reinforcing member 20, a partition member 30, and a bag member 40. The inside of the packaging member 10 is filled with an adhesive to be impregnated into each packaged member. The packaging member 10 protects the worker from the adhesive during work. The packaging member 10 is made of synthetic resin that has low affinity for adhesives. The material of the packaging member 10 is a transparent material. Therefore, the operator can grasp the degree of impregnation of each member with the adhesive. The packaging member 10 is a cylindrical bag having a length in the vertical direction of a hollow column. The packaging member 10 is provided with an inlet valve (not shown) above it. The introduction valve can be opened and closed. Each member and adhesive are introduced into the packaging member 10 from the introduction valve.

The "worker" is a natural person who uses this unit 1 to perform reinforcement (repair) work on a hollow columnar object by this method.

The "adhesive" is used to bond the reinforcing member 20, which will be described later, to the inner wall of the illumination pillar P, or to bond the partition members 30 together. The adhesive is, for example, an epoxy resin adhesive. The reinforcing member 20 and the partition member 30 are impregnated with the adhesive.

The reinforcing member 20 is attached to the inner wall of the illumination pillar P to reinforce the strength of the illumination pillar P from the inside. The reinforcing member 20 is made of high-strength fiber (high-strength fiber sheet) that can be impregnated with an adhesive, such as aramid fiber, carbon fiber, glass fiber, polyethylene fiber, or vinylon fiber. The reinforcing member 20 has a cylindrical shape having the length in the vertical direction (axial direction) of the hollow columnar object. The reinforcing member 20 has an outer diameter that is slightly larger than the inner diameter of the illumination column P, or has an outer diameter that is the same as the inner diameter of the illumination column P. The reinforcing member 20 is pressed against the inner wall of the lighting column P by each of the plurality of bag members 40 described below expanding. The pressed reinforcing member 20 can be deformed so as to come into close contact with the inner wall of the illumination pillar P. The reinforcing member 20 includes an internal space inside the reinforcing member 20. The internal space is divided by a partition member 30, which will be described later. The unit main body H is composed of a reinforcing member 20 and a partition member 30. The detailed configuration of the unit body H will be described later.

The partition member 30 is arranged along the vertical direction (axial direction) of the reinforcing member 20. That is, the partition member 30 extends in the axial direction of the reinforcing member 20. The partition member 30 divides the interior space of the reinforcing member 20 into a plurality of individual spaces. The partition member 30 is arranged in a vertical node shape that partitions the internal space of the reinforcing member 20. The material of the partition member 30 is the same as that of the reinforcing member 20. The partition member 30 has strength due to hardening of the impregnated adhesive or the like. A portion of the partition member 30 is integrated with a portion of the reinforcing member 20. A portion of the partition member 30 and a portion of the reinforcing member 20 that are integrated are cylindrical. The partition member 30 divides the internal space of the reinforcing member 20 into four parts. That is, four individual spaces are formed in the interior space. A central space adjacent to each of the four individual spaces is formed inside the partition member 30. The specific configuration of the partition member 30 provided on the reinforcing member 20 will be described later.

The bag member 40 is expanded by filling the inside of the bag member 40 with gas. The expanded bag member 40 presses the reinforcing member 20 against the inner wall of the lighting column P. The pressed reinforcing member 20 is adhered (fixed) to the inner wall of the illumination pillar P by hardening the adhesive impregnated in advance. The expanded bag member 40 presses adjacent partition members 30 together. The partition members 30 pressed together are adhered (fixed) to each other by hardening the adhesive impregnated in advance. The bag member 40 is a nonwoven fabric made of elastic synthetic resin fibers such as polyethylene fibers. The bag members 40 are arranged in each of the four individual spaces.

The bag member 40 is deflated before being supplied with gas. The bag member 40 is expanded by supplying gas to the inside of the bag member 40 . The bag member 40 is a balloon body that can be deformed by supplied gas. The bag member 40 includes an individual bag member 41 and a valve body 42.

The size of the individual bag member 41 corresponds to the size of the individual space. Each individual bag member 41 is arranged in each of the four individual spaces. Each of the four individual bag members 41 extends in the axial direction of the reinforcing member 20. The upper end of the individual bag member 41 projects upward from the upper end of the reinforcing member 20. The lower end of the individual bag member 41 projects downward from the lower end of the reinforcing member 20. That is, the length of the individual bag member 41 is longer than the length of the reinforcing member 20 in the vertical direction.

The outer diameter of the individual bag member 41 is larger than the radial size of the individual space. When all the individual bag members 41 arranged in the respective individual spaces are inflated, the outer diameter of the unit main body H can be expanded to be larger than the inner diameter of the illumination pillar P. The individual bag member 41 is an example of a bag member in the present invention.

The valve body 42 is a supply port that supplies the gas pressure-fed from the compressor C (see FIG. 11) to the inside of each individual bag member 41. The valve body 42 is a check valve. The valve body 42 is arranged on the upper surface of each of the four individual bag members 41. The supply pipe 43 (see FIG. 11) is attached to the valve body 42. The supply pipe 43 is communicated with the compressor C.

●Configuration of the unit body Next, the configuration of the unit body H will be explained.

FIG. 4 is a schematic diagram of two bonded sheets constituting this unit H.

This figure shows how two joining sheets S1 and S2 (high-strength fiber sheets) are overlapped. The unit main body H is formed using two joining sheets S1 and S2. In the drawing, the front side (the front side of the paper) is the first bonded sheet S1. The back side of the first joining sheet S1 is the second joining sheet S2. A broken line on the surface of the first joining sheet S1 indicates a location where the two joining sheets S1 and S2 are sewn together. The shapes of the two joining sheets S1 and S2 are rectangular with the same size. In this figure, for convenience of explanation, the positions of the two joining sheets S1 and S2 are shown shifted, but the joining sheets S1 and S2 to be sewn are completely overlapped.

The manufacturing process of this unit H will be explained. First, two bonded sheets S1 and S2 are overlapped. Next, the two joining sheets S1 and S2 are sewn together along the broken lines in FIG. Four rectangular areas are formed on the surface of the first joined sheet S1 that has been sewn together. Next, the two stitched joining sheets S1 and S2 are stitched together with both left and right sides in the transverse direction brought together. That is, the two joined sheets S1 and S2 are formed into a cylindrical shape by sewing together the right edge and the left edge in the drawing. The formed cylindrical member is the unit main body H.

FIG. 5 is a schematic perspective view of the unit main body H that constitutes the present unit 1. As shown in FIG.

The figure shows two joined sheets S1 and S2 sewn together into a cylindrical shape. Of the two joined sheets S1 and S2 sewn together into a cylindrical shape, the first joined sheet S1 on the front side functions as the reinforcing member 20. The second joining sheet S2 arranged inside the first joining sheet S1 functions as the partition member 30. That is, the unit main body H includes a reinforcing member 20 and a partition member 30. The reinforcing member 20 and the partition member 30 are integrated.

A space is formed inside the first joining sheet S1. The space inside the first joining sheet S1 is an internal space. The internal space extends in the axial direction of the first joining sheet S1 (reinforcing member 20).

A second bonding sheet S2 is arranged in the internal space. A part of the first joining sheet S1 and a part of the second joining sheet S2 are sewn (joined) together in an overlapping state. Therefore, a portion of the first joining sheet S1 and a portion of the second joining sheet S2 that overlap each other are formed into a cylindrical shape. That is, a space is formed by a part of the first joining sheet S1 (reinforcing member 20) and a part of the second joining sheet S2 (partitioning member 30). In this embodiment, four spaces are formed. Each of these four spaces is an individual space. Each individual space extends in the axial direction of the reinforcing member 20.

A space surrounded by the second joining sheet S2 is formed inside the partition member 30. The space inside the second joining sheet S2 (partition member 30) is a central space. The central space is a space adjacent to each of the four individual spaces. The central space extends the axial length of the reinforcing member 20. The internal space inside the reinforcing member 20 includes an individual space and a central space.

Note that the unit main body in the present invention is not limited to being formed by sewing two joining sheets together. For example, the unit main body in the present invention may be formed by bundling four elongated cylindrical parts each having individual spaces. Further, the unit main body may be formed by arranging a cylindrical component having four individual spaces inside a cylindrical component serving as a reinforcing member.

●Placement of the core material in the unit body H Next, the arrangement of the core material 50 in the central space formed in the unit body H will be explained.
FIG. 6 is a schematic perspective view of the core material 50 inserted into the unit main body H.

The core material 50 is arranged in the main unit 1. The core material 50 cooperates with the unit main body H and a fluid solidifying material, which will be described later, to increase reinforcing strength. The core material 50 increases the bending strength, shear strength, etc. of the hollow columnar material by pouring a fluid solidifying material into the bag member 40. The core material 50 includes a cross member 51 and a connector 52. The core material 50 is formed by connecting a plurality of cross members 51. The length of the core material 50 is approximately the same as the length of the reinforcing member 20 in the axial direction.

The cross member 51 is made of steel. The shape of the cross member 51 is a columnar shape having a length in the vertical direction of the hollow columnar object. The horizontal cross section of the cross member 51 is cross-shaped. The cross member 51 is formed into a cross-shaped horizontal section by combining four rectangular plates at one side edge in the transverse direction. In the core material 50, a plurality of cross members 51 are arranged in the axial direction of the reinforcing member 20. The arranged cross members 51 have approximately the same length as the length of the reinforcing member 20 in the axial direction. Two vertically adjacent cross members 51 are connected by a connecting tool 52, respectively. A hole 53 is formed in the rectangular plate portion of the cross member 51 on the upper side and the lower side of the plate portion. In the vertically adjacent cross members 51, a hole 53 formed on the lower side of the plate of the upper cross member 51 and a hole 53 formed on the upper side of the plate of the lower cross member 51 are connected to each other. 52. The connected cross members 51 are an example of a core material in the present invention.

Connector 52 is made of steel. The shape of the connector 52 is a ring. The core material 50 is bendable at the portion where the connector 52 is placed. The core material 50 is bendable together with the main unit 1 when inserted into the main unit 1 . When inserting this unit 1 inside the illumination pillar P, the operator can insert the core material 50 while bending it. Therefore, the insertion work by the operator becomes easier.

Note that the connector in the present invention may be made of resin, vinyl, polyethylene, fiber, or the like. The shape of the connector may be hook-like. The connector may be configured to connect the upper and lower cross members by tying string-like members.

FIG. 7 is a schematic perspective view of the unit body H showing how the core material 50 is arranged in the unit body H.

This figure shows how the core material 50 is arranged in the central space formed inside the partition member 30 in the unit main body H. A portion of the partition member 30 forming the four individual spaces is disposed so as to bulge inward (in the opposite direction in the radial direction). Therefore, the central space formed inside the partition member 30 has a substantially cross-shaped horizontal section. The core material 50 (connected cross members 51) having a cross-shaped horizontal cross section is inserted inside the unit main body H along the cross-shaped space in the central space. The cross members 51 constituting the core material 50 are arranged in the axial direction of the reinforcing member 20 within the central space. The core material 50 has approximately the same length as the reinforcing member 20 in the axial direction. That is, the core material 50 extends in the axial direction of the reinforcing member 20. The core material 50 is arranged such that the partition member 30 covers the entire outer periphery of the core material 50. The core material 50 becomes integral with the partition member 30 when the adhesive impregnated into the partition member 30 hardens. The core material 50 is placed together with the main unit 1 at the intended reinforcement location.

Note that the core material in the present invention may be configured as a single cross member. The shape of the core material may be any shape as long as it can be placed in the central space, and for example, the core material may have a round cross section or a bundled shape. The material of the core material may be any material that can enhance either the shear strength or bending strength of the hollow columnar material, and may be other than steel, such as an aramid rod, for example.

Moreover, some hollow columnar objects are equipped with a shackle that penetrates inside the hollow columnar object in order to prevent the hollow columnar object from sinking or being pulled out. If such a shackle exists, the core material constituted by the cross member cannot be placed at a reinforced location inside the hollow columnar object because the shackle becomes an obstacle to insertion. Therefore, the core material may be provided with a notch at the lower end of the cross member. The cut is a substantially conical space extending from the outer periphery of the core toward the center of the core (in the opposite radial direction). The tip of the core material provided with the notch has a leg shape that is a combination of four approximately right triangles. The four legs of the core provided with the notches protrude downward from the central portion of the core. The tips of the four leg-shaped parts are arranged evenly around the outer periphery of the core material. The core material provided with the notch is inserted into the hollow columnar object after being positioned in the circumferential direction of the hollow columnar object so that the leg portions at the tip of the core material and the shackles do not come into contact with each other. That is, the leg-like portions of the core material are inserted between the shackles and the inner wall of the hollow columnar object. The core material inserted into the hollow columnar object is inserted until the center portion of the core material contacts the shackles and stops moving. The position where the hollow columnar material contacts and does not move is the reinforced part of the hollow columnar object. Here, the unit body includes a slit in which the shackles are arranged in the axial direction from the lower end of the unit body to the position where the center portion of the core material is arranged (where the shackles are arranged). A slit in which the shackle is placed is formed along the central space.

●Arrangement of the bag member in the unit body Next, the arrangement of the bag member 40 in the individual spaces in the unit main body H will be explained.

FIG. 8 is a schematic perspective view of the unit body H showing how the bag member 40 is arranged in the unit body H.

The bag member 40 is inserted into the individual space of the main unit 1. The bag members 40 are arranged in each of the four individual spaces of the unit body H. In other words, each of the four individual bag members 41, which is the bag member 40, is inserted into each of the four individual spaces. The individual bag members 41 are contracted before being supplied with gas. The individual bag member 41 is expanded by filling the inside of the individual bag member 41 with gas. The inflated individual bag member 41 extends in the axial direction of the reinforcing member 20.

FIG. 9 is a sectional view taken along the line BB in a state where the core material 50 and the bag member 40 are arranged in the unit main body H of FIG.

For convenience of explanation, this figure shows a state in which the individual bag member 41 is filled with gas. In the drawing, a cross member 51 constituting a core member 50 is arranged at the center of the unit 1. The partition member 30 is arranged so as to cover the cross member 51. The partition member 30 is arranged in a cross shape along the cross shape of the cross member 51. Since the individual bag members 41 arranged in the individual spaces are filled with gas, adjacent partition members 30 are pressed against each other. At this time, the cross member 51 is covered and included by the partition member 30. The reinforcing member 20 is arranged outside the partition member 30 so as to surround the partition member 30.

The individual bag member 41 inserted into the individual space and inflated has a substantially fan-shaped horizontal cross section. That is, a portion of the reinforcing member 20 and a portion of the partition member 30 are arranged in a substantially fan-shaped horizontal cross section. That is, the four fan-shaped horizontal sections are combined, and the reinforcing member 20 has the same outer periphery as the circular horizontal section of the illumination column P.

The unit main body H has a vertical length of a hollow columnar member. In other words, the reinforcing member 20 has an axial length corresponding to the position of the hollow columnar object to be reinforced by the unit 1. The partition member 30 has approximately the same length as the reinforcing member 20 in the axial direction. That is, the partition member 30 is arranged as a plate-shaped partition having the length in the vertical direction of the hollow columnar object. The cross member 51 covered by the partition member 30 has approximately the same length as the length of the reinforcing member 20 in the axial direction. That is, the cross member 51 has an axial length corresponding to the reinforcement position.

●Method for reinforcing hollow columnar objects using reinforcing unit Next, this method using this unit 1 will be explained. In the following description, it is assumed that a worker uses this unit 1 to reinforce the strength of the lighting pole P. This method consists of a working hole formation process, a pretreatment process, an impregnation process, an insertion process, a unit arrangement process (removal process), a pasting process (expansion process, adhesion process), a filler supply process, and a solidification process. and a closing process.

First, the operator performs a work hole forming step.

FIG. 10 is a schematic cross-sectional view of the illumination column P showing a state after the working hole Ph is formed in the illumination column P. In the figure, the boundary between above ground and underground is indicated by a chain double-dashed line.

The "working hole forming step" is a step of forming a working hole Ph in the outer peripheral surface of the illumination pillar P.

A worker forms a working hole Ph from the outer circumferential surface of the lighting column P using, for example, a drill or a cutter. The working hole Ph is formed at a position where the reinforcing position can be reached by the worker. The reinforcement location is often near the ground surface. That is, for example, the working hole Ph is formed at a position of about 500 mm to 800 mm from the ground surface. The working hole Ph is a hole having a size large enough for the unit 1 to be inserted therein and for an operator to work therein.

Next, the operator performs a pretreatment step.

The "pretreatment process" is a process of performing pretreatment before constructing the present unit 1.

The pre-treatment process includes, for example, an observation process in which the inside of the illumination pillar P is observed using an imaging device such as a camera, and water accumulated inside the illumination pillar P is removed using a drainage device such as a pump. It includes a drainage treatment for draining water, and a cleaning treatment for polishing and cleaning the inner wall of the lighting pillar P using a device such as a wire brush.

Next, the operator performs the impregnation step.

In the "impregnation step", the inside of the packaging member 10 is filled with adhesive from the introduction valve of the packaging member 10, and the reinforcing member 20 and partition member 30 included in the packaging member 10 are impregnated with the adhesive. It is a process.

First, the operator opens the introduction valve of the packaging member 10. Next, the operator fills the inside of the packaging member 10 with adhesive. The operator closes the inlet valve while exhausting excess air from the packaging member 10 using an exhaust pump (not shown) or the like. Next, the operator presses the packaging member 10 from the outside using, for example, a roller. The reinforcing member 20 and the partition member 30 included in the packaging member 10 are impregnated with an adhesive. After the impregnation process, the unit 1 becomes a flat plate.

Next, the operator opens the introduction valve of the packaging member 10 again and inserts the core material 50 inside the packaging member 10. Here, the core material 50 is inserted into the central space. Since the plurality of cross members 51 are connected by the connecting tools 52, the core material 50 is arranged inside the partition member 30 while being bent at the portion where the connecting tools 52 are arranged. The unit 1 including the core material 50 is bendable at the portion where the connector 52 is arranged.

Next, the operator performs the insertion process.

The "insertion process" is a process of inserting the present unit 1 inside the illumination pillar P.

FIG. 11 is a schematic cross-sectional view of the illumination column P showing a state in which the unit main body H is arranged inside the illumination column P. In the figure, the boundary between above ground and underground is indicated by a chain double-dashed line.

First, the operator opens the introduction valve of the packaging member 10 and attaches the supply pipe 43 to the valve body 42 of the bag member 40. Next, the worker inserts this unit 1 into the inside of the illumination pillar P through the work hole Ph. This unit 1 is inserted into the inside of the lighting column P while being bent at the portion where the connector 52 is arranged.

Next, the operator executes a unit placement process.

The "unit placement process" is a process of arranging the present unit 1 at a reinforcement position of the illumination pillar P. The unit placement process includes a removal process.
The "take-out process" is a process of taking out the packaging member 10 from the inside of the illumination pillar P to the outside.

First, the operator adjusts the length of a connecting member (not shown) such as a wire and places the unit 1 at a desired reinforcement position. The arrangement position of the present unit 1 inside the illumination pole P is determined with the present unit 1 suspended inside the illumination pole P. At this time, the upper end of the unit main body H in the present unit 1 is connected at one end of the connecting member. The other end of the connecting member is fixed inside the illumination pillar P above the main unit 1. Next, the operator cuts only the packaging member 10 in the unit 1 with a cutter or the like and removes it from the unit main body H. The removed packaging member 10 is taken out from the working hole Ph of the illumination pillar P. In the removal process, the packaging member 10 is removed inside the illumination pillar P. Therefore, even if the excess adhesive inside the packaging member 10 leaks, the worker will not stain the surroundings of the work site.

Note that the unit arrangement step may be any other known step; for example, the operator connects one end of the connecting member to a balloon-shaped fixing member, and fixes this fixing member on the upper side inside the hollow columnar object. This unit may be placed as follows. Alternatively, the operator may place the lower end of the unit on the bottom surface within the hollow column. In the removal step in the present invention, the packaging members may be sequentially removed immediately before inserting the unit into the hollow columnar object.

Next, the operator performs the pasting process.

The "pasting process" is a process in which the bag member 40 is filled with gas, the reinforcing member 20 is pressed against the inner wall of the illumination pillar P, and the adjacent partition members 30 are pressed and pasted together. The pasting process includes an expansion process and a close contact process.

FIG. 12 is a schematic cross-sectional view of the lighting column P showing a state in which the bag member 40 of the present unit 1 is filled with gas and the reinforcing member 20 is pressed against the inner wall of the lighting column P. In the figure, the boundary between above ground and underground is indicated by a chain double-dashed line.

The "inflation step" is a step of filling the bag member 40 with gas and inflating the bag member 40.
The "adhesion process" is a process of deforming the reinforcing member 20 so as to make close contact with the inner wall of the illumination pillar P, and pasting the reinforcing member 20 on the inner wall of the illumination pillar P.

First, an operator connects the supply pipe 43 attached to the valve body 42 to the compressor C. Next, the operator fills the inside of the individual bag member 41 with gas via the supply pipe 43. Gas from the compressor C fills the individual bag member 41. As a result, the individual bag member 41 expands. The supply pipe 43 is, for example, a tube made of synthetic resin such as polyurethane.

When the individual bag members 41 are inflated, each individual bag member 41 pushes out the reinforcing member 20 from inside so as to fit the shape of the inner wall of the illumination column P. The outer peripheral surface of the reinforcing member 20 is pressed against the inner wall of the lighting column P by each expanded individual bag member 41. The pressed reinforcing member 20 is fixed to the inner wall of the lighting column P by hardening the adhesive. At this time, the reinforcing member 20 is deformed so as to come into close contact with the inner wall of the illumination column P, and has the same shape (cylindrical shape) as the inner wall of the illumination column P. That is, the reinforcing member 20 deforms into a substantially circular horizontal cross section as each individual bag member 41 expands.

On the other hand, when the individual bag members 41 are expanded, the individual bag members 41 press the adjacent partition members 30 together. The partition members 30 that are pressed together are bonded together as the adhesive hardens. The partition member 30 is arranged along the vertical direction (axial direction) of the reinforcing member 20, and divides the internal space of the reinforcing member 20 into four individual spaces. At this time, the partition member 30 has structural strength as a vertical joint of the inner space of the reinforcing member 20 due to the hardening of the impregnated adhesive or the like. A core material 50 is included inside the partition member 30 .

In this way, the reinforcing member 20 impregnated with the adhesive is pressed against the inner wall, so that the reinforcing member 20 is closely adhered to the inner wall without any gaps. As a result, when the adhesive is cured, the reinforcing member 20 and the synthetic resin adhesive have a structure similar to that of a synthetic resin reinforced with fibers, that is, FRP (Fiber Reinforced Plastics).

Similarly, the partition members 30 impregnated with the adhesive are pressed by adjacent partition members 30, so that the partition members 30 come into close contact with each other and are bonded. As a result, when the adhesive is cured, the partition member 30 and the synthetic resin adhesive have a structure similar to fiber-reinforced synthetic resin, that is, FRP.

In this way, the present method creates a structure similar to FRP inside the hollow columnar object, thereby reinforcing the strength of the hollow columnar object.

Note that in this method, the arrangement of the core material in the unit body is not essential.

Next, the operator executes a filler supply step.

The "filler supply step" is a step of filling the inside of the bag member 40 with the filler 60, which is a fluid solidifying material.

FIG. 13 is a schematic cross-sectional view of the illumination pillar P showing a state in which the bag member 40 of FIG. 12 is filled with a fluid solidifying material. In the figure, the boundary between above ground and underground is indicated by a chain double-dashed line.

The "filling material 60" is a fluid solidifying material (for example, mortar, plaster, adhesive, etc.) that is in a fluid state when filled and solidifies over time. The filler 60 is a non-shrinking mortar that shrinks little during solidification.

First, the operator removes the supply pipe 43 from the valve body 42 and takes it out from the work hole Ph of the lighting column P. Next, the upper surface of each individual bag member 41 is cut open, and the filler 60 is supplied to the inside of each individual bag member 41, for example, via a liquid feed pipe (not shown) connected to a pump (not shown). . The filler 60 is filled into each of the four individual bag members 41. That is, each of the individual bag members 41 is expanded by filling the inside of the individual bag member 41 with the filler material 60. The filler 60 presses the reinforcing member 20 against the inner wall of the lighting column P, and also presses the adjacent partition members 30 against each other. At this time, the filler 60 presses the adjacent partition members 30 against each other and includes the core material 50 via the partition members 30. The upper and lower ends of the individual bag members 41 protrude from the upper and lower ends of the reinforcing member 20, respectively. Therefore, the filler 60 is filled in the reinforcing member 20 below the lower end of the reinforcing member 20 and above the upper end of the reinforcing member 20 .

Next, the operator performs a solidification process.

The "solidification process" is a process of solidifying the filler 60 filled in the bag member 40.

The operator waits for time to solidify the filled filling material 60. The filler 60 solidifies due to chemical changes over time while the reinforcing member 20 and the partition member 30 are pressed together. The solidified filler 60 increases the strength of the illumination pillar P as a structure. The solidified filler 60 is integrated with the structure formed by the reinforcing member 20 and the partition member 30, and further increases the strength of the illumination pillar P. The solidified filler 60 is integrated with the core material 50 included in the partition member 30, and further increases the strength of the illumination column P. That is, the solidified filler 60 becomes integrated with the reinforcing member 20, the partition member 30, and the core material 50, and dramatically increases the strength of the lighting column P.

The operator then performs a closing process.

The "closing step" is a step of closing the working hole Ph using a decorative member (not shown).

First, the worker takes out the liquid feed pipe connected to the pump, unnecessary wires, etc. from the work hole Ph of the lighting column P. Next, the operator makes a final check of the inside of the illumination pillar P, and closes the work hole Ph from the outside with the decorative member.

FIG. 14 is a sectional view taken along the line GG of the illumination pillar P in FIG. 13.

The figure shows a state in which the illumination pillar P is reinforced. The shape of the illumination pillar P is approximately circular in horizontal cross section. The reinforcing member 20 is arranged on the inner wall with an adhesive interposed therebetween without any gaps. A partition member 30 is arranged inside the reinforcing member 20 in a substantially cross shape. A portion of the reinforcing member 20 and a portion of the partition member 30 provide four individual spaces. In each of the individual spaces, individual bag members 41 are arranged without any gaps via an adhesive. The inside of the individual bag member 41 is filled with a filler 60. The filler 60 presses the reinforcing member 20 against the inner wall via the individual bag member 41, and also presses the adjacent partition members 30 against each other. A core material 50 is arranged inside the partition member 30. The core material 50 is arranged in accordance with the cross shape formed by the partition member 30. The core material 50 is configured by a plurality of cross members 51 arranged in the axial direction of the reinforcing member 20. The core material 50 is in close contact with the partition member 30 via an adhesive.

In this way, by arranging the present unit 1 inside the illumination pillar P, the strength of the illumination pillar P is reinforced. The strength of the lighting pillar P is due to the structure similar to FRP constituted by the unit body H, the filler 60 filled inside the unit body H, and the core material 50 placed inside the partition member 30. Reinforced from the inside. The reinforcing member 20 is disposed on the inner wall of the illumination pillar P without any gaps, and functions as a structure similar to FRP. The partition member 30 has a vertical node shape inside the reinforcing member 20 along the axial direction of the reinforcing member 20, and functions as a structure similar to FRP. The filler 60 is filled inside the reinforcing member 20 and functions as a structure when solidified. The core material 50 is included by the partition member 30 and the filler material 60, and functions as a reinforcing steel material. The reinforcement member 20, the partition member 30, the core material 50, and the filler material 60 are integrated into the lighting pillar P, and the strength of the lighting pillar P is dramatically increased.

●Summary According to the embodiment described above, the present unit 1 includes a cylindrical reinforcing member 20 disposed inside the hollow columnar object, and a plurality of bag members 40 disposed in the internal space of the reinforcing member 20. , a partition member 30 that divides the internal space of the reinforcing member 20 into a plurality of individual spaces in which the plurality of bag members 40 are respectively disposed, and the partition member 30 extends in the axial direction of the reinforcing member 20. The reinforcing member 20 can be deformed so as to come into close contact with the inner wall of the hollow columnar object by expanding each of the plurality of bag members 40, and each of the plurality of expanded bag members 40 can be deformed in the axial direction of the reinforcing member 20. extends to As a result, in the existing hollow columnar object, the reinforcing member 20 is disposed on the inner wall of the hollow columnar object without any gaps, and the partition member 30 forms a vertical node inside the reinforcing member 20 along the axial direction of the reinforcing member 20. be placed and reinforced.

Further, according to the embodiment described above, the partition member 30 is integrated with the reinforcing member 20.
As a result, in the existing hollow columnar object, the reinforcing member 20 and the partition member 30 function as one, and the strength of the existing hollow columnar object is increased.

Further, according to the embodiment described above, the first joining sheet S1 functioning as the reinforcing member 20 and the second joining sheet S2 functioning as the partitioning member 30 are sewn together, so that the partitioning member 30 is connected to the reinforcing member 20. Become one with. As a result, the unit main body H is manufactured more easily than by bundling elongated cylindrical parts.

Furthermore, according to the embodiment described above, each of the plurality of individual spaces is formed by a part of the first joining sheet S1 and a part of the second joining sheet S2. As a result, the reinforcing member 20 and the partition member 30 can work together to reinforce the existing hollow columnar object.

Furthermore, according to the embodiment described above, the expanded bag member 40 presses the adhesive-impregnated first bonding sheet S1 against the inner wall of the hollow columnar object. As a result, the reinforcing member 20 is disposed on the inner wall of the hollow columnar object without any gaps, reinforcing the hollow columnar object as having a structure similar to FRP.

Furthermore, according to the embodiment described above, the reinforcing member 20 has one or more core members 50 disposed in the inner space, and the inner space of the reinforcing member 20 is divided into a plurality of individual spaces. The core member 50 includes an adjacent central space, and the core member 50 is disposed in the central space and extends in the axial direction of the reinforcing member 20 . As a result, in the existing hollow columnar object, the unit main body H of the present unit 1 and the core material 50 function as one, and the strength of the existing hollow columnar object is increased.

Furthermore, according to the embodiment described above, the number of core materials 50 is plural, and the plurality of core materials 50 are arranged in the axial direction of the reinforcing member 20 in the central space. Among the materials 50, two adjacent core materials 50 are connected by a connecting tool 52. As a result, the core material 50 is arranged according to the axial length of the unit 1.

Furthermore, according to the embodiment described above, the reinforcing member 20 is bendable at the portion where the connector 52 is arranged. As a result, the present unit 1 in which the core material 50 is arranged can be bent when inserted into the inside through the working hole Ph of the existing hollow columnar object. Therefore, the operator can easily insert the unit 1 inside the hollow columnar object. In other words, the work efficiency of the worker is improved.

Furthermore, according to the embodiment described above, the bag member 40 expands when the inside of the bag member 40 is filled with gas, so that the reinforcing member 20 is pressed against the inner wall of the hollow columnar object without any gap, and the adjacent The partition members 30 are pressed against each other. As a result, the reinforcing member 20 and the partition member 30 have a three-dimensional structure (for example, cylindrical, vertically segmented, etc.). When the impregnated adhesive hardens, the reinforcing member 20 and the partition member 30 function as a structure similar to FRP.

Furthermore, according to the embodiment described above, the bag member 40 is expanded by filling the inside of the bag member 40 with the fluid solidifying material, so that the reinforcing member 20 is pressed against the inner wall of the hollow columnar object without any gap. At the same time, adjacent partition members 30 are pressed against each other. As a result, when the fluid solidified material is solidified, the reinforcing member 20, the partition member 30, and the fluid solidified material function together to increase the strength of the existing hollow columnar object.

●Reinforcement unit for hollow columnar objects (2)●
Next, regarding another embodiment (hereinafter referred to as "second embodiment") of the reinforcing unit for a hollow columnar object according to the present invention, the embodiment described previously (hereinafter referred to as "first embodiment") I will mainly explain the different parts. In the second embodiment, the arrangement of the core material is different from the first embodiment. In the following description, elements that are common to the first embodiment and elements that differ only in posture (position and orientation) from the first embodiment are given the same reference numerals, and part or all of the description thereof will be omitted. Ru.

FIG. 15 is a horizontal sectional view of a reinforced lighting column P showing a second embodiment of the present unit 1 according to the present invention.

The figure shows a state in which the existing hollow columnar object (lighting column P) has been reinforced. The shape of the illumination pillar P is approximately circular in horizontal cross section. The reinforcing member 20 is arranged on the inner wall with an adhesive interposed therebetween without any gaps. A partition member 30 is arranged on the inner surface of the reinforcing member 20 so as to have a substantially cross-shaped horizontal cross section. A portion of the reinforcing member 20 and a portion of the partition member 30 form four individual spaces. The individual bag members 41 are arranged in the individual spaces without any gaps through adhesive. The inside of this individual bag member 41 is filled with a filler 60. The filler 60 presses the reinforcing member 20 against the inner wall via the individual bag member 41, and also presses the adjacent partition members 30 against each other. A central space is arranged inside the partition member 30, and a core material 50A is arranged in this central space. The core material 50A is four rod-shaped members. The material of the core material 50A is steel. The four core members 50A are arranged at each of the four tip portions of the cross-shaped partition member 30 (near the sewn portion between the reinforcing member 20 and the partition member 30). That is, each of the core materials 50A is arranged diagonally. Each of the core members 50A has approximately the same length as the axial length of the reinforcing member 20. Each of the core materials 50A is enclosed in the partition member 30 via an adhesive.

Note that the core material may be, for example, an aramid rod.

In this way, the present unit 1 is arranged inside the illumination pillar P, thereby reinforcing the strength of the illumination pillar P. The strength of the lighting pillar P is due to the structure similar to FRP constituted by the unit body H, the filler 60 filled inside the unit body H, and the core material 50A placed inside the partition member 30. Reinforced from the inside. The reinforcing member 20 is disposed on the inner wall of the illumination pillar P without any gaps, and functions as a structure similar to FRP. The partition member 30 has a vertical node shape inside the reinforcing member 20 along the axial direction of the reinforcing member 20, and functions as a structure similar to FRP. The filler 60 is filled inside the reinforcing member 20 and functions as a structure when solidified. The core material 50A is included by the partition member 30 and the filler material 60, and functions as a reinforcing steel material. The strength of the illumination pillar P is dramatically improved by integrating the reinforcing member 20, the partition member 30, the core material 50A, and the filler material 60.

●Summary (2)
According to the embodiment described above, the four core members 50A of the unit 1 improve the bending strength at the reinforced position by a pair of opposing steel members. Further, the core material 50A of the present unit 1 improves the shear strength at the reinforced position due to the shear strength of the steel material. Since the four core members 50A are equally arranged in four directions, they are effective against horizontal forces (earthquakes, etc.).

●Modified example of this unit●
Modifications of this unit will be described below.

●Modified example of this unit (1)
FIG. 16 is a horizontal sectional view of the present unit showing a modification of the present unit.

FIG. 16 shows a configuration in which individual spaces divided into four by partition members 30a are arranged inside a reinforcing member 20 formed in a cylindrical shape. Each of the four individual spaces extends in the axial direction of the reinforcing member 20. An individual bag member 41 is arranged in an individual space formed by a part of the reinforcing member 20 and a part of the partition member 30a.

●Modified example of this unit (2)
FIG. 17 is a horizontal sectional view of this unit showing another modification of this unit.

FIG. 17 shows a configuration in which individual spaces divided into three by a partition member 30b are arranged inside a reinforcing member 20 formed in a cylindrical shape. Each of the three individual spaces extends in the axial direction of the reinforcing member 20. An individual bag member 41 is arranged in an individual space formed by a part of the reinforcing member 20 and a part of the partition member 30b.

●Modified example of this unit (3)
FIG. 18 is a horizontal sectional view of this unit showing yet another modification of this unit.

FIG. 18 shows a configuration in which an individual space divided into two by a partition member 30c is arranged inside a reinforcing member 20 formed in a cylindrical shape. Each of the two individual spaces extends in the axial direction of the reinforcing member 20. An individual bag member 41 is arranged in an individual space formed by a part of the reinforcing member 20 and a part of the partition member 30c.

●Other●
In addition, in each embodiment described above, the number of individual spaces formed inside the reinforcing member is not limited to 2 to 4. The number of individual spaces partitioned off inside the reinforcing member by the partition member may be five or more. When the number of individual spaces is five or more, the number of internal spaces partitioned by partition members increases in accordance with the number of individual spaces formed.

Further, in each of the embodiments described above, a structure may be adopted in which the core material is not included inside the partition member. If the core material is not included, the existing hollow columnar object is reinforced with a reinforcing member, a partition member, and a filler.

Further, in each of the embodiments described above, the process of inserting the unit is performed by forming a working hole in the hollow columnar object and inserting the unit, but the process is not limited to such a process. For example, the insertion step may be a known step of opening the upper end of an existing hollow columnar object and inserting the present unit from the upper end. The insertion process may be a known process in which a pulley is attached above the inside of the existing hollow columnar object, a connecting member such as a wire is passed through the pulley, and the unit is inserted.

Furthermore, the impregnation step may be, for example, a step in which the adhesive is applied to the inner wall of the hollow columnar object in advance. In the partition member, the structure within the reinforcing member can be maintained by filling the bag member with a fluid solidifying material without impregnating it with an adhesive.

Furthermore, the bag member may be filled with the fluid solidifying material manually. In manual filling, for example, first, an incision is made on the top surface of the bag member, and then, a tool such as a funnel is used to pour the fluid solidified material into the inside of the bag member.

1 unit (reinforcement unit)
10 Packaging member 20 Reinforcing member 30 Partition member 40 Bag member 41 Individual bag member 50 Core material 50A Core material 51 Cross member 52 Connector 60 Filling material (fluid solidifying material)
P Lighting pillar (hollow pillar)
H Unit body S1, S2 Joint sheet

Claims (16)

A reinforcing unit for reinforcing the hollow columnar object from inside the hollow columnar object,
a cylindrical reinforcing member disposed inside the hollow columnar object;
a plurality of bag members disposed in the internal space of the reinforcing member;
a partition member that divides the internal space of the reinforcing member into a plurality of individual spaces in which each of the plurality of bag members is arranged;
It has
The partition member extends in the axial direction of the reinforcing member,
The reinforcing member is deformable so as to come into close contact with the inner wall of the hollow columnar object by expanding each of the plurality of bag members,
Each of the plurality of inflated bag members extends in the axial direction,
A reinforcing unit for hollow columnar objects. the partition member is integral with the reinforcing member;
A reinforcing unit for hollow columnar objects according to claim 1. a first bonding sheet that functions as the reinforcing member;
a second bonded sheet that functions as the partition member;
are sutured so that the partition member becomes integrated with the reinforcing member,
A reinforcing unit for hollow columnar objects according to claim 2. Each of the plurality of individual spaces is formed of a part of the first joining sheet and a part of the second joining sheet,
A reinforcing unit for hollow columnar objects according to claim 3. The expanded bag member presses the first bonding sheet impregnated with adhesive against the inner wall of the hollow columnar object.
A reinforcing unit for hollow columnar objects according to claim 4. The reinforcing member has one or more core materials disposed in the internal space,
The internal space of the reinforcing member is
a central space adjacent to each of the plurality of individual spaces;
including;
The core material is arranged in the central space and extends in the axial direction,
A reinforcing unit for hollow columnar objects according to claim 1. The number of core materials is plural,
The plurality of core materials are arranged in the axial direction within the central space,
Among the plurality of core materials, two adjacent core materials are connected by a connector,
A reinforcing unit for hollow columnar objects according to claim 6. The reinforcing member is bendable at a portion where the connector is arranged.
A reinforcing unit for hollow columnar objects according to claim 7. The bag member expands when gas is filled inside the bag member.
A reinforcing unit for hollow columnar objects according to claim 1. The bag member is expanded by filling the inside of the bag member with a fluid solidifying material.
A reinforcing unit for hollow columnar objects according to claim 1. A method for reinforcing a hollow columnar object using a reinforcing unit that reinforces the hollow columnar object from inside the hollow columnar object, the method comprising:
The reinforcement unit is
a cylindrical reinforcing member disposed inside the hollow columnar object;
a plurality of bag members disposed in the internal space of the reinforcing member;
a partition member that divides the internal space of the reinforcing member into a plurality of individual spaces in which each of the plurality of bag members is arranged;
Equipped with
an insertion step of inserting the reinforcing unit into the inner side of the hollow columnar object so that the partition member extends in the axial direction of the reinforcing member;
an expansion step of inflating each of the plurality of bag members;
a contacting step of deforming the reinforcing member so as to bring it into close contact with the inner wall of the hollow columnar object by expanding each of the plurality of bag members;
It has
Each of the plurality of inflated bag members extends in the axial direction,
A method for reinforcing a hollow columnar object, characterized by: The reinforcement unit is
multiple core materials,
Equipped with
The internal space of the reinforcing member is
a central space adjacent to each of the plurality of individual spaces;
including;
The plurality of core materials are arranged in the central space and arranged in the axial direction,
Among the plurality of core materials, two adjacent core materials are connected by a connector,
The reinforcing member is bendable at a portion where the connector is arranged,
In the insertion step, the reinforcing unit is inserted into the inner side of the hollow columnar object in a bent state at a portion where the connector is disposed.
The method for reinforcing a hollow columnar object according to claim 11. In the expansion step, the bag member is expanded by filling the inside of the bag member with gas.
The method for reinforcing a hollow columnar object according to claim 11. In the expansion step, the bag member is expanded by filling the inside of the bag member with a fluid solidifying material.
The method for reinforcing a hollow columnar object according to claim 11. an impregnating step of impregnating the reinforcing member with an adhesive before the inserting step;
consisting of
The method for reinforcing a hollow columnar object according to claim 11. The reinforcement unit is
a packaging member for packaging the reinforcing member;
Equipped with
In the impregnation step, the reinforcing member packaged in the packaging member is impregnated with the adhesive,
Before the expansion step, a taking-out step of taking out the packaging member inserted into the inside of the hollow columnar object from the inside of the hollow columnar object to the outside of the hollow columnar object;
consisting of
The method for reinforcing a hollow columnar object according to claim 15.

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