JP6983190B2 - How to reinforce tubular reinforcements and existing concrete columns - Google Patents

Description

The present invention relates to a tubular reinforcing material for reinforcing an existing concrete column, and a method for reinforcing the existing concrete column using the tubular reinforcing material.

Conventionally, as a technique for reinforcing concrete columns used for overhead lines of distribution lines and communication lines, for example, as in Patent Document 1 and Patent Document 2, a reinforcing bar or an aramid rod is inserted into a hollow portion of the column, and a cement system is used. A method of hardening and fixing with a solidifying material to improve the cross-sectional strength is known.

In addition, as a method of reinforcing by using the hollow portion of the pillar, a method of injecting a foamable resin material into the hollow portion of the pillar and curing the hollow portion as in Patent Document 3 to reinforce the pillar, and Patent Document 4 as in the case of Patent Document 4. Also known is a method in which a bag made of a fiber sheet is inserted into a hollow portion of a pillar, a solidifying material is injected into the bag, and the solidified material is hardened and reinforced.

Further, a method of installing a curved steel plate on the outer peripheral portion of a pillar to improve the cross-sectional yield strength as in Patent Document 5, and a method of attaching a fiber sheet to the outer peripheral portion of a pillar with an adhesive as in Patent Document 6. Etc. are also known.

Further, as a method of providing the reinforcing material in the hollow portion of the existing concrete column, as in Patent Document 7, a method of suspending and inserting the reinforcing material from the opening at the upper end of the column, or in Patent Document 4 As described above, a method of inserting a reinforcing material from an opening provided on the side surface of the column is also known.

Japanese Unexamined Patent Publication No. 2003-166352 Japanese Unexamined Patent Publication No. 2005-307479 Japanese Unexamined Patent Publication No. 2009-114815 Japanese Unexamined Patent Publication No. 2012-127134 Japanese Unexamined Patent Publication No. 2016-37764 Japanese Unexamined Patent Publication No. 6-322999 Japanese Unexamined Patent Publication No. 2017-89273

However, in the above-mentioned method of Patent Document 1, since the position of the reinforcing bar inserted in the column is not fixed, there is a possibility that the reinforcing bar cannot be reliably reinforced.

In the method of Patent Document 2, the structure becomes complicated because the aramid rod as a reinforcing material is arranged at a predetermined position, and the inside of the column becomes narrower as the number of aramid rods increases in order to further improve the yield strength. , The solidifying material may not be filled properly.

In the method of Patent Document 3, since the reinforcing material is a foamable resin material, there is a problem that the reinforcing strength is relatively low and the reinforcing efficiency is low in the first place.

In the method of Patent Document 4, it is necessary to insert the bag formed of the fiber sheet into the column without damaging it, and the high-strength fiber sheet is relatively expensive, the material cost increases, and the reinforcing performance is sufficient. It is necessary to install the bag body so as to be in close contact with the inner wall of the pillar, and it is necessary to inject air or a filler into the bag body at high pressure, which is complicated.

In addition, it is necessary to provide an opening on the side surface so as not to damage the reinforcing steel material arranged along the axial direction in the concrete of the column. Further, after inserting the reinforcing material, it is necessary to close the opening provided on the side surface of the column with a material having a strength equal to or higher than that of the column. Therefore, the work of installing the reinforcing material is complicated, including the treatment of the openings provided on the side surfaces of such columns.

In the methods of Patent Document 5 and Patent Document 6, in order to attach the reinforcing material to the outer peripheral portion of the column, it is necessary to temporarily remove the column fittings and devices attached to the outside of the column. In addition, when reinforcing the ground area where the bending stress due to external force such as an earthquake is maximum, it is necessary to excavate the circumference of the column once and backfill it after installing the reinforcing material. Therefore, the work of installing the reinforcing material is complicated.

In the method of Patent Document 7, since the reinforcing material is suspended and inserted, it is generally necessary to use a crane having a lift about twice that of a column having a height of 10 m or more above the ground.

Therefore, there has been a demand for a technique that can efficiently reinforce existing concrete columns in terms of both material cost and work.

The present invention has been made in view of these points, and an object of the present invention is to provide a tubular reinforcing material capable of efficiently reinforcing existing concrete columns and a method for reinforcing existing concrete columns.

The tubular reinforcing material according to claim 1 is a tubular reinforcing material for reinforcing an existing concrete pillar that is inserted into an existing concrete pillar and fixed by a filler, and has a plurality of tubular reinforcing bodies that can be connected to each other. Each reinforcing body has a maximum outer diameter smaller than the inner diameter of the existing concrete column, and the inner diameter of one end in the axial direction is larger than the outer diameter of the other end in the axial direction. The other end in the axial direction of the other reinforcing body is inserted into one end in the direction and connected to the existing concrete column.

The tubular reinforcing material according to claim 2 is the tubular reinforcing material according to claim 1, wherein the reinforcing body has a holding member for holding in the opening at the upper end of the existing concrete column.

The tubular reinforcing material according to claim 3 is the tubular reinforcing material according to claim 2, and includes a holding jig installed at the upper end of an existing concrete column and engaging with a holding member.

The tubular reinforcing material according to claim 4 is the tubular reinforcing material according to any one of claims 1 to 3, wherein the tubular reinforcing material includes a connecting holding body that holds the connected state of the reinforcing body, and the reinforcing body attaches the connecting holding body. It has a mounting part for the purpose.

The tubular reinforcing material according to claim 5 is the tubular reinforcing material according to any one of claims 1 to 4, wherein the reinforcing body has a guide member for positioning with respect to an existing concrete column.

The tubular reinforcing material according to claim 6 is the tubular reinforcing material according to any one of claims 1 to 5, wherein the reinforcing body has an inflow hole through which the filler can flow into the hollow internal space. be.

The method for reinforcing an existing concrete pillar according to claim 7 is a method for reinforcing an existing concrete pillar using the tubular reinforcing material according to any one of claims 1 to 6, and is one reinforcement arranged on the lower side. The body is lifted, one of the reinforcements is held in the opening at the upper end of the existing concrete column, another reinforcement is connected above the one reinforcement, and the tubular reinforcement has a predetermined axial length. A plurality of reinforcing bodies are connected until it becomes possible, a tubular reinforcing material of a predetermined length in which the multiple reinforcing bodies are connected is installed in an existing concrete pillar, and the filling material is filled in the existing concrete pillar to a predetermined height and solidified. It is something that makes you.

The method for reinforcing an existing concrete column according to claim 8 is the method for reinforcing an existing concrete column according to claim 7, when three or more reinforcing bodies are connected, the plurality of connected reinforcing bodies are connected. The uppermost reinforcing body is held in the opening at the upper end of the existing concrete column, and another reinforcing body is connected to the held uppermost reinforcing body.

According to the present invention, since there are a plurality of connectable reinforcing bodies and each reinforcing body in the connected state is fixed in the existing concrete column by the filler, the existing concrete column can be efficiently reinforced.

It is sectional drawing which shows the structure of the tubular reinforcing material which concerns on one Embodiment of this invention. It is explanatory drawing for demonstrating the reinforcement method of the existing concrete column using the same-mentioned tubular reinforcing material. It is explanatory drawing following FIG. 2 of the same above. It is explanatory drawing following FIG. 3 of the same above. It is explanatory drawing following FIG. 4 of the same above. It is explanatory drawing following FIG. 5 of the same above. (A) and (b) are plan views which show the structure of the reinforcing jig in the said tubular reinforcing material.

Hereinafter, the configuration of one embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a tubular reinforcing material, and as shown in FIGS. 2 to 6, the tubular reinforcing material 1 is a cement inserted into an existing concrete column 2 and filled in the existing concrete column 2. It is fixed with a filler 3 such as a system solidifying material. That is, by solidifying the filled filler 3 in the existing concrete column 2, the tubular reinforcing material 1 is fixed to the existing concrete column 2, and as a result, the cross-sectional strength of the existing concrete column 2 is improved.

The tubular reinforcing material 1 includes a plurality of hollow reinforcing bodies 4a and 4b that can be connected to each other, and a rod-shaped pin 6 as a connecting holding body that holds the connected state of the reinforcing bodies 4a and 4b. It is provided with a holding jig 7 used for holding the body 4a in the opening at the upper end of the existing concrete pillar 2.

Then, the tubular reinforcing member 1 is inserted into the existing concrete column 2 in a state where a plurality of reinforcing bodies 4a and 4b are connected and the connection is held by the pins 6.

The reinforcing bodies 4a and 4b have a tubular reinforcing body main body 11, and the maximum outer diameter of the reinforcing body main body 11 is smaller than the inner diameter of the existing concrete column 2 and can be inserted into the existing concrete column 2 along the axial direction. Is.

Further, the reinforcing body main body 11 is integrally provided with a fitting pipe 12 at the upper end portion, which is one end portion in the axial direction, by welding or the like.

The inner diameter of the fitting pipe 12 is slightly larger than the outer diameter of the lower end portion, which is the other end portion in the axial direction of the reinforcing body main body 11. That is, in the reinforcing body main body 11, the inner diameter of the fitting pipe 12 located at the upper end portion is slightly larger than the outer diameter of the lower end portion, and the reinforcing body main body of the other reinforcing body 4b is contained in the fitting pipe 12 of one reinforcing body 4a. The lower end of 11 can be inserted.

Such reinforcing bodies 4a and 4b are provided on the side portion in the vicinity of both ends in the axial direction and the holding metal fitting 14 as a holding member for locking and holding the opening 13 at the upper end of the existing concrete column 2. An insertion hole 15 as a mounting portion, a guide member 16 for positioning in the existing concrete column 2, a hook member 17 for suspending in the existing concrete column 2, for example, a crane, and a reinforcing body. It has a ring bar member 18 provided on the outer peripheral surface of the main body 11.

The holding metal fitting 14 is integrated with the side surface of the reinforcing body main body 11 by welding or the like, and is provided so as to protrude from the side surface of the reinforcing body main body 11.

The holding metal fittings 14 are arranged apart from each other in the circumferential direction of the reinforcing body main body 11. More specifically, the holding metal fittings 14 are provided on opposite sides of the outer peripheral surface of the reinforcing body main body 11 with respect to the radial center, and face each other in the radial direction so as to form a pair. Have been placed.

The insertion hole 15 is provided in the vicinity of the other end in the axial direction of the fitting pipe 12 and the reinforcing body main body 11, and the pin 6 can be inserted therein. That is, with the lower end side of the reinforcing body main body 11 of the other reinforcing body 4b inserted into the fitting pipe 12 of one reinforcing body 4a, the insertion holes 15 of the reinforcing bodies 4a and 4b are overlapped with each other. By inserting and fixing the pin 6 through the insertion holes 15, the connected state of the reinforcing bodies 4a and 4b is maintained.

The guide member 16 is integrally provided on the reinforcing body main body 11 by welding or the like, and is formed in a triangular shape in a cross-sectional view.

Then, the triangular tip portion abuts on the inner peripheral surface of the existing concrete column 2 and the inner peripheral edge portion of the opening 13 at the upper end, so that the tubular reinforcing material 1 is positioned with respect to the existing concrete column 2. Will be inserted.

The hook member 17 is formed in a substantially U-shape so that a rod-shaped member is curved so that a part thereof becomes an arc shape.

Further, both ends are integrated with the outer peripheral portion of the fitting pipe 12 by welding or the like so that the arc-shaped curved portion protrudes upward from the upper end portion of the fitting pipe 12. Then, it is possible to hook a crane hook or the like on the arcuate portion protruding from the fitting pipe 12.

The ring bar member 18 is provided to increase the contact area of the reinforcing bodies 4a and 4b with respect to the filler 3, and is arranged on the side surface of the reinforcing body main body 11 so as to make one round in the circumferential direction. , Is integrated by welding, etc.

As shown in FIG. 7A, the holding jig 7 has a disk-shaped jig main body 21 mounted on the upper end edge of the existing concrete pillar 2.

The jig main body 21 is provided with a central hole portion 22 which is a through hole located at the center thereof, and a plurality of, for example, four insertion hole portions 23 provided on the peripheral edge of the central hole portion 22 and separated from each other in the circumferential direction. ing.

The central hole 22 is open to a size that the reinforcing body main body 11 can be inserted into, but the holding metal fitting 14 cannot be inserted. That is. The diameter of the central hole portion 22 is larger than the outer diameter of the reinforcing body main body 11 and smaller than the distance between the tip portions of the holding metal fittings 14.

The insertion hole portion 23 is formed by being opened outward from the central hole portion 22. Further, the insertion hole portions 23 are arranged at a predetermined angle, for example, 90 degrees apart in the circumferential direction of the central hole portion 22. That is, in each insertion hole portion 23, the two insertion hole portions 23 are arranged so as to face each other in the radial direction of the central hole portion 22 to form a pair, and the two insertion hole portions 23 are arranged in the intersecting direction. ..

Further, the distance between the tips of the pair of insertion holes 23 is longer than the distance between the tips of the holding metal fittings 14.

Therefore, in the reinforcing bodies 4a and 4b, when the position of the holding metal fitting 14 corresponds to the position of the insertion hole portion 23 of the holding jig 7 in a plan view, the holding metal fitting 14 passes through the insertion hole portion 23. Can be inserted into the existing concrete pillar 2.

On the other hand, when the position of the holding metal fitting 14 does not correspond to the position of the insertion hole portion 23 of the holding jig 7 in a plan view, the holding metal fitting 14 engages with the peripheral edge of the central hole portion 22 of the holding jig 7. Then, the movement to the lower side is locked. That is, the reinforcing bodies 4a and 4b are not inserted into the existing concrete column 2, but are held in the opening 13 at the upper end of the existing concrete column 2 via the holding jig 7.

In this way, the reinforcing bodies 4a and 4b can be inserted into the existing concrete column 2 and held at the upper end of the existing concrete column 2 according to the arrangement relationship of the holding metal fitting 14 with respect to the holding jig 7 in a plan view. You can switch between possible states.

Next, the operation and effect of the above embodiment will be described.

When reinforcing the existing concrete column 2 by using the tubular reinforcing material 1, first, as shown in FIG. 2, a holding jig 7 is installed in the opening 13 at the upper end of the existing concrete column 2.

One reinforcing body 4a is lifted by a crane, and as shown in FIG. 3, a part of the one reinforcing body 4a is inserted from the upper side of the existing concrete pillar 2, and the holding metal fitting 14 and the holding jig 7 of the reinforcing body 4a are inserted. Is engaged, and one reinforcing body 4a is held in the opening 13 of the existing concrete pillar 2 via the holding jig 7.

Next, the other reinforcing body 4b is lifted by a crane, the other reinforcing body 4b is lowered from the upper side of the one reinforcing body 4a, and the reinforcing body main body in the other reinforcing body 4b is attached to the fitting pipe 12 of the one reinforcing body 4a. Insert the bottom edge of 11.

When connecting the plurality of reinforcing bodies 4a, 4b ..., the uppermost reinforcing body of the already connected reinforcing bodies 4a, 4b ... Is opened in the existing concrete column 2 via the holding jig 7. It is held by the portion 13, and another unconnected reinforcing body is connected to the held uppermost reinforcing body.

With the lower end of the other reinforcing body 4b inserted into the fitting pipe 12 of the one reinforcing body 4a, the insertion hole 15 provided in the fitting pipe 12 of the one reinforcing body 4a and the other reinforcing body 4b The position of the other reinforcing body 4b with respect to one reinforcing body 4a is adjusted so as to correspond to the insertion hole 15 provided near the lower end portion of the reinforcing body main body 11.

Further, as shown in FIG. 4, the pin 6 is inserted into the insertion hole 15 and fixed to maintain the state in which one reinforcing body 4a and the other reinforcing body 4b are connected to each other.

After the plurality of reinforcing bodies 4a and 4b are connected in this way and the axial length of the tubular reinforcing material 1 reaches a predetermined length, the tubular reinforcing material 1 is slightly lifted by a crane, and one reinforcing body is used. The engagement between the holding metal fitting 14 of 4a and the holding jig 7 is released.

Further, the tubular reinforcing material 1 is rotated so that the position of the insertion hole portion 23 of the holding jig 7 and the position of the holding metal fitting 14 correspond to each other, and the tubular reinforcing material 1 is lowered so as to be suspended from the existing concrete column 2. It is inserted inside, and as shown in FIG. 5, the tubular reinforcing material 1 is installed at the bottom of the existing concrete column 2.

When lowering the tubular reinforcing material 1, the guide member 16 is brought into contact with the inner peripheral surface of the existing concrete column 2 and the peripheral edge of the opening 13, so that the tubular reinforcing material 1 is placed in the substantially central portion of the existing concrete column 2. It can be lowered while being positioned so that it can be placed.

After that, a filler injection pipe is inserted from the opening 13 at the upper end of the existing concrete pillar 2 to inject the filler 3 into the existing concrete pillar 2 and fill the existing concrete pillar 2 to a predetermined height. In the state where the filler 3 is filled, the filler 3 is filled at least between the inner circumference of the existing concrete column 2 and the outer circumference of the tubular reinforcing member 1.

Then, when the filler 3 is solidified, the tubular reinforcing material 1 is fixed in the existing concrete column 2, and the existing concrete column 2 is reinforced.

According to the above embodiment, since the tubular reinforcing member 1 has a plurality of reinforcing bodies 4a and 4b that can be connected, the plurality of connected reinforcing bodies 4a and 4b are connected by the filler 3 in the existing concrete column 2. Since it is fixed, the basic work when installing the tubular reinforcing material 1 is to connect the plurality of reinforcing bodies 4a and 4b, and the tubular reinforcing material 1 composed of the plurality of connected reinforcing bodies 4a and 4b. Since only the insertion into the existing concrete pillar 2 and the filling of the filler 3 are performed, the installation work is not complicated and easy.

Further, since the tubular reinforcing material 1 is formed by connecting a plurality of reinforcing bodies 4a and 4b, the tubular reinforcing material having a predetermined height is formed in the existing concrete column 2 without using a long so-called single reinforcing material. Since 1 can be installed, the lift of the crane can be suppressed. That is, since the reinforcing bodies 4a and 4b are lifted one by one and sequentially connected at the upper ends of the existing concrete columns 2 to assemble the tubular reinforcing member 1, the crane used for the installation work of the tubular reinforcing member 1 is the existing concrete column 2. In addition to the above-ground height, it is sufficient to have a lift corresponding to the height (axial length) of one reinforcing body 4a, 4b.

Therefore, it does not require special materials, unnecessarily large work machines or complicated work, and it can work even in a narrow work site, so it is already installed from the viewpoint of manufacturing cost and workability. The concrete pillar 2 can be efficiently reinforced.

Further, since the tubular reinforcing material 1 is an assembly type composed of a plurality of reinforcing bodies 4a and 4b connected to each other, the reinforcing height can be adjusted according to the number of the reinforcing bodies 4a and 4b to be connected. Installation work and materials can be shared at sites where the heights required for reinforcing the concrete columns 2 are different, and the versatility is good.

Further, the tubular reinforcing material 1 is provided with a pin 6 for holding the connected state between the reinforcing body 4a and the reinforcing body 4b, and each reinforcing body 4a and 4b has an insertion hole 15 into which the pin 6 can be inserted, which makes it easy. It is possible to reliably maintain the connection between the reinforcing bodies 4a and 4b with a flexible configuration.

Each of the reinforcing bodies 4a and 4b has a holding metal fitting 14 for holding the reinforcing body 4a and 4b in the opening 13 at the upper end of the existing concrete pillar 2, so that the lower reinforcing body 4a is used when connecting the reinforcing body 4a and the reinforcing body 4b. Since the reinforcing body 4b can be connected to the upper side of the existing concrete pillar 2 while being held in the opening 13, the reinforcing bodies 4a and 4b can be connected one by one with a simple configuration, and the lift of the crane can be suppressed. can.

Further, since the tubular reinforcing material 1 is provided with the holding jig 7, the holding metal fitting 14 of the reinforcing body 4a is engaged with the holding jig 7, so that the reinforcing body 4a is more securely inserted into the opening 13 of the existing concrete column 2. Can be held in.

Since each of the reinforcing bodies 4a and 4b has a guide member 16, the tubular reinforcing material 1 can be positioned with respect to the existing concrete column 2 when the tubular reinforcing material 1 is inserted into the existing concrete column 2 and descends, which is appropriate. The filler 3 can be reliably filled by installing it at a suitable position.

In the above embodiment, the tubular reinforcing material 1 has a configuration in which two reinforcing bodies 4a and 4b are connected to each other, but the configuration is not limited to such a configuration, and the tubular reinforcing material 1 has a predetermined height. The number of reinforcing bodies 4a, 4b ... To be connected can be changed as appropriate so as to be.

Further, for example, when connecting three or more reinforcing bodies, after connecting the two reinforcing bodies 4a and 4b as described above, the relationship between the holding metal fitting 14 of the lower reinforcing body 4a and the holding jig 7 is engaged. The combination is released, the two connected reinforcing bodies 4a and 4b are slightly lowered, and the holding metal fitting 14 of the upper reinforcing body 4b is engaged with the holding jig 7, and the reinforcing body 4b is further mounted from above. Connect other reinforcements.

That is, when connecting three or more reinforcing bodies 4a, 4b ..., the reinforcing bodies 4a, 4b ... located at the uppermost part of the already connected reinforcing bodies 4a, 4b ... Are used as the reinforcing jig 7. It is engaged to hold the opening 13, and other unconnected reinforcing bodies are connected to the reinforcing bodies 4a, 4b ... At the uppermost portion thereof.

The reinforcing bodies 4a and 4b have a configuration in which a fitting pipe 12 having an inner diameter larger than the outer diameter of the reinforcing body main body 11 is provided at the upper end portion of the reinforcing body main body 11, but the configuration is not limited to such a configuration. In the reinforcing bodies 4a and 4b, the inner diameter of one end in the axial direction is larger than the outer diameter of the other end in the axial direction, and one end of the reinforcing body 4a in the axial direction is located at one end in the axial direction of the other reinforcing body 4b. Any configuration may be used as long as the other end is inserted to be connected.

The holding jig 7 is not limited to the configuration shown in FIG. 7 (a), and is already installed according to the arrangement relationship of the holding metal fitting 14 with respect to the holding jig 7, as in the modified example shown in FIG. 7 (b). Any configuration may be used as long as it can be switched between a state in which it can be inserted into the concrete pillar 2 and a state in which it can be held at the upper end of the existing concrete pillar 2.

The filler 3 may be filled at least in the space between the inner peripheral surface of the existing concrete column 2 and the outer peripheral surface of the tubular reinforcing material 1, but for example, on the side surface of the reinforcing body main body 11, the inside of the reinforcing body main body 11 may be filled. The filler 3 injected into the existing concrete column 2 is the tubular reinforcing material 1 by providing an inflow hole (not shown) through which the filler 3 in the unsolidified state can flow into the internal space of the existing concrete column 2. It is preferable because it is easy to go around to the inside, the tubular reinforcing material 1 can be more firmly fixed to the existing concrete column 2, and the integrity can be improved.

1 Tubular reinforcement 2 Existing concrete columns 3 Filler
4a Reinforcement
4b Reinforcing body 6 Pin as a connecting holding body 7 Holding jig
13 opening
14 Holding bracket as a holding member
15 Insertion hole as a mounting part
16 Guide member

Claims (8)

A tubular reinforcing material for reinforcing existing concrete columns that is inserted into existing concrete columns and fixed by a filler.
With multiple tubular reinforcements that can be connected to each other
The maximum outer diameter of each reinforcing body is smaller than the inner diameter of the existing concrete column, and the inner diameter of one end in the axial direction is larger than the outer diameter of the other end in the axial direction.
A tubular reinforcing material characterized in that the other end in the axial direction of one reinforcing body is inserted into one end in the axial direction and the other end in the axial direction is inserted into an existing concrete column in a connected state. The tubular reinforcing material according to claim 1, wherein the reinforcing body has a holding member for holding the reinforcing body in the opening at the upper end of the existing concrete column. The tubular reinforcing material according to claim 2, further comprising a holding jig installed at the upper end of an existing concrete column and engaging with a holding member. Equipped with a connection holder that holds the connection state of the reinforcement,
The tubular reinforcing material according to any one of claims 1 to 3, wherein the reinforcing body has a mounting portion for mounting a connecting and holding body. The tubular reinforcing material according to any one of claims 1 to 4, wherein the reinforcing body has a guide member for positioning with respect to an existing concrete column. The tubular reinforcing material according to any one of claims 1 to 5, wherein the reinforcing body has an inflow hole through which the filler can flow into the hollow internal space. A method for reinforcing an existing concrete column using the tubular reinforcing material according to any one of claims 1 to 6.
Lift one reinforcement placed on the lower side,
The one reinforcing body is held in the opening at the upper end of the existing concrete column,
Connect the other reinforcement to the upper side of that one reinforcement,
Connect multiple reinforcements until the tubular reinforcement has a predetermined axial length,
A tubular reinforcing material of a predetermined length, in which multiple reinforcing bodies are connected, is installed in the existing concrete column.
A method for reinforcing an existing concrete column, which comprises filling an existing concrete column with a filler to a predetermined height and solidifying the existing concrete column. When connecting three or more reinforcing bodies, the uppermost reinforcing body among the plurality of connected reinforcing bodies is held in the opening at the upper end of the existing concrete column.
The method for reinforcing an existing concrete column according to claim 7, wherein another reinforcing body is connected to the held uppermost reinforcing body.

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