JP6920688B2 - How to build column reinforcement structure and column reinforcement structure - Google Patents

Description

The present invention relates to a column reinforcing structure for reinforcing existing columns such as electrified columns and signal columns, and a method for constructing a column reinforcing structure.

Conventionally, pillars have been rebuilt in order to increase the strength of existing electrified pillars and signal pillars, but rebuilding pillars increases the construction period and construction cost, so it is desirable to reinforce without rebuilding the pillars. ing.
For example, regarding the reinforcement of columns, a column reinforcement structure is known in which two semi-cylindrical reinforcing metal fittings are fixed to the peripheral surface of a steel pipe column having a substantially circular cross section to reinforce the steel pipe column (for example, Patent Document 1). reference.).
Since this column reinforcement structure can be constructed manually without using heavy machinery, it is suitable for reinforcing steel pipe columns erected in places where it is difficult to carry in heavy machinery.

Japanese Unexamined Patent Publication No. 2006-291535

However, in the case of the column reinforcement structure of Patent Document 1, since it is a single-layer structure in which the peripheral surface of the steel pipe column is covered with a metal plate, it can be said that the reinforcement strength simply depends on the strength of the metal plate.
Therefore, the present inventors have studied to realize a column reinforcement structure having workability that can be constructed by human work and having higher reinforcement strength.

An object of the present invention is to provide a column reinforcing structure that can be constructed with good workability and has higher reinforcing strength, and a method for constructing the column reinforcing structure.

In order to achieve the above object, the first invention according to the present application is
It is a column reinforcement structure in which a column having a substantially circular cross section is reinforced with a pair of reinforcing metal fittings and a fastening member that tightens the pair of reinforcing metal fittings facing each other with the column sandwiched toward the column.
The reinforcing metal fitting is
A long plate portion arranged along the pillar at a position away from the pillar,
A contact plate portion that is fixed to both sides of the long plate portion in the width direction and is in contact with the pillar, and a contact plate portion.
With
The contact plate portion is fixed so as to form a space between the contact plate portion and the long plate portion.
The fastening member is bridged over the contact plate portion of the pair of reinforcing metal fittings facing each other across the pillar, and both ends of the fastening member are accommodated in the space.
The pair of reinforcing metal fittings are fastened by the fastening member so as to sandwich the pillar.
In the case of a column reinforcement structure having such a configuration, the reinforcing metal fittings are installed so as to lean against the column so that the contact plate portion is in contact with the column, and the column is sandwiched between the pair of reinforcing metal fittings. Can be constructed with good workability by fastening to the pillar.
Further, this column reinforcing structure has a double structure consisting of the abutting plate portion and the long plate portion by forming a space between the abutting plate portion and the long plate portion, as in the prior art. Since it has a higher reinforcing strength than the column reinforcing structure having a single-layer structure, the column can be satisfactorily reinforced by this column reinforcing structure.
Further, for example, if the fastening member protrudes from the outer peripheral surface of the reinforcing metal fitting, not only the appearance of the column reinforcing structure is spoiled, but also the worker may come into contact with the protruding portion.
Therefore, if both ends of the fastening member are housed in the space so that the fastening member does not protrude from the outer peripheral surface of the reinforcing metal fitting, it is possible to prevent the trouble of the operator contacting the fastening member and the column reinforcement structure. It is possible to improve the aesthetics of.

In order to achieve the above object, the second invention according to the present application is
It is a column reinforcement structure in which a column having a substantially circular cross section is reinforced by a pair of reinforcing metal fittings and a hanging metal fitting arranged at a predetermined position of the column.
The reinforcing metal fitting is
A long plate portion arranged along the pillar at a position away from the pillar,
A contact plate portion that is fixed to both sides of the long plate portion in the width direction and is in contact with the pillar, and a contact plate portion.
A hanging part provided at the upper end of the reinforcing metal fitting and
With
The contact plate portion is fixed so as to form a space between the contact plate portion and the long plate portion.
The hanging metal fitting has a pair of hook portions and has a pair of hook portions.
The pair of reinforcing metal fittings are fastened so as to sandwich the pillar in a state where the hanging portion is hung on the hook portion of the hanging metal fitting arranged on the pillar.
In the case of a column reinforcement structure having such a configuration , the reinforcing metal fittings are hung from the hanging metal fittings arranged on the pillars, and the reinforcing metal fittings are installed so as to lean against the columns in a direction in which the contact plate portion is in contact with the columns, and a pair of reinforcements are provided. It is possible to construct the column with good workability by fastening the pair of reinforcing metal fittings to the column in a state where the column is sandwiched between the metal fittings.
Further, this column reinforcing structure has a double structure consisting of the abutting plate portion and the long plate portion by forming a space between the abutting plate portion and the long plate portion, as in the prior art. Since it has a higher reinforcing strength than the column reinforcing structure having a single-layer structure, the column can be satisfactorily reinforced by this column reinforcing structure.
As described above, a column reinforcing structure in which a pair of reinforcing metal fittings are fastened in a state where the reinforcing metal fittings are suspended from the hanging metal fittings arranged on the column can be constructed with good workability.

Also, preferably
The space formed between the contact plate portion and the long plate portion has a polygonal cross-sectional view.
By doing so, the double structure of the contact plate portion and the long plate portion becomes a stable three-dimensional structure, and the column can be satisfactorily reinforced by this column reinforcement structure.

In addition, other inventions according to this application
This is the method for constructing the above-mentioned column reinforcement structure.
The step of arranging the hanging metal fitting at a predetermined position of the pillar, and
A step of hanging the hanging portion on the hook portion of the hanging metal fitting and installing the pair of reinforcing metal fittings so as to hang them on the pillar.
The process of tightening and fastening the pair of reinforcing metal fittings toward the pillar,
I tried to prepare.

In this way, if the hanging part is hung on the hook part of the hanging metal fittings arranged in advance on the pillar and the reinforcing metal fittings are hung on the pillar, the reinforcing metal fittings will not fall down, so that a plurality of workers A pair of reinforcing metal fittings can be easily fastened with a fastening member without supporting the reinforcing metal fittings, and a column reinforcing structure in which a column is sandwiched between the pair of reinforcing metal fittings can be constructed with good workability.
Further, the column reinforcing structure constructed in this way has a double structure due to the formation of a space between the contact plate portion and the long plate portion, and is a column having a single-layer structure as in the prior art. Since it has a higher reinforcing strength than the reinforcing structure, the column can be satisfactorily reinforced by this column reinforcing structure.

According to the present invention, a column reinforcing structure that can be constructed with good workability and has higher reinforcing strength can be obtained.

It is a front view (a) and the side view (b) which shows the column reinforcement structure of this embodiment. It is sectional drawing which shows the column reinforcement structure of this embodiment. It is a front view (a) which shows the reinforcing metal fitting of this embodiment, and is the cross-sectional view (b). It is sectional drawing (a) (b) which shows the modification of the column reinforcement structure. It is a front view which shows the deformation example of a reinforcing metal fitting. It is a front view which shows the reinforcing metal fitting of Embodiment 2. It is a top view (a), a side view (b), and a front view (c) which show a hanging metal fitting. It is a front view (a) and the side view (b) which shows the column reinforcement structure of Embodiment 2.

Hereinafter, embodiments of the column reinforcing structure and the method for constructing the column reinforcing structure according to the present invention will be described in detail with reference to the drawings. However, although the embodiments described below are provided with various technically preferable limitations for carrying out the present invention, the scope of the present invention is not limited to the following embodiments and illustrated examples.
The column reinforcement structure of the present embodiment uses a pair of reinforcing metal fittings to reinforce existing concrete columns such as electrified columns and signal columns.

(Embodiment 1)
FIG. 1A is a front view of a pillar reinforcing structure 100 in which a pillar P having a substantially circular cross section such as an electrified pillar or a signal pillar is reinforced by using a pair of reinforcing metal fittings 10, and FIG. 1B is a pillar reinforcing structure 100 thereof. FIG. 2 is a cross-sectional view of the pillar reinforcing structure 100.
Further, FIG. 3A is a front view showing the reinforcing metal fitting 10, and FIG. 3B is a cross-sectional view of the reinforcing metal fitting 10.
The pillar P here has a taper that tapers toward the upper end.

As shown in FIGS. 1 (a) and 1 (b), 2 and 3 (a) and 3 (b), the reinforcing metal fitting 10 is a long plate arranged along the pillar P at a position away from the pillar P. A portion 11 and a contact plate portion 12 which is fixed to both sides of the long plate portion 11 in the width direction and is brought into contact with the pillar P are provided.
The long plate portion 11 is a member formed by bending a long metal plate, and has four creases along the longitudinal direction so as to exhibit a substantially bracket shape in cross section (for example, a shape like “[”). It is formed.
The abutting plate portion 12 is a member formed by bending a long metal plate having a width narrower than that of the long plate portion 11, and has two creases along the longitudinal direction so as to exhibit a substantially bracket shape in cross section. It is formed.
The long plate portion 11 and the contact plate portion 12 are formed by using, for example, a metal plate such as SS400 (rolled steel material for general structure) having a thickness of 3.2 mm.

Then, one end of the contact plate 12 is fixed to both ends of the long plate 11 in the width direction by welding, and the other end of the contact plate 12 is attached to the inner wall surface of the long plate 11. It is fixed by welding.
In the present embodiment, the contact plate portion 12 is fixed to the long plate portion 11 by YAG laser welding.
In particular, the long plate portion 11 and the contact plate portion 12 are fixed so that the concave inner surfaces face each other, and the contact plate portion 12 forms a space R between the long plate portion 11 and the long plate portion 11. It is fixed.
Here, a space R having a pentagonal cross-sectional view is formed between the contact plate portion 12 and the long plate portion 11.

Further, the contact plate portion 12 is formed with a plurality of small holes 12a through which the bolts 21 are passed, and the long plate portion 11 has a plurality of small holes 12a at positions corresponding to the small holes 12a of the contact plate portion 12. An opening 11a is formed.
In the present embodiment, 11 small holes 12a are formed in the contact plate portion 12 and 11 openings 11a are formed in the long plate portion 11 along the longitudinal direction of the reinforcing metal fitting 10.

The reinforcing metal fitting 10 is formed in the orientation shown in FIG. 3A, for example, having a length of 300 cm, a width of an upper end portion of 27 cm, and a width of a lower end portion of 30 cm.
As described above, the reinforcing metal fitting 10 is formed in a tapered shape corresponding to the tapered shape of the column P that tapers toward the upper end.
Further, since the weight of the reinforcing metal fitting 10 of this size is about 40 kg, it can be carried by two workers.

Then, in order to attach the reinforcing metal fitting 10 to the pillar P, the reinforcing metal fitting 10 is leaned against the pillar P in a direction in which the contact plate portion 12 is brought into contact with the pillar P, and the pillar P is sandwiched between the pair of reinforcing metal fittings 10. The bolt 21 is passed through the small hole 12a of the contact plate portion 12 so as to bridge the contact plate portion 12 of the pair of reinforcing metal fittings 10, and the nut 22 is screwed into the bolt 21.
Specifically, the bolt 21 is passed through the small hole 12a of the contact plate portion 12 through the opening 11a of one reinforcing metal fitting 10, and the bolt 21 protruding from the small hole 12a of the contact plate portion 12 of the other reinforcing metal fitting 10. The nut 22 is screwed into the opening 11a.

Then, by tightening the nut 22 to the bolt 21, the pair of reinforcing metal fittings 10 can be tightened toward the pillar P.
As described above, the bolt 21 and the nut 22 have a function of tightening the pair of reinforcing metal fittings 10 toward the pillar P. In the present embodiment, the fastening member 20 for tightening the pair of reinforcing metal fittings 10 toward the pillar P is composed of bolts 21 and nuts 22.

The reinforcing metal fitting 10 is formed in a tapered shape corresponding to the tapered shape of the pillar P, and the contact plate portion 12 of the reinforcing metal fitting 10 is in line contact with the pillar P.
If the contact plate portions 12 of the pair of reinforcing metal fittings 10 are configured to make line contact along the longitudinal direction of the column P, the tightening amount of the nut 22 screwed to the bolt 21 can be adjusted. The pillar P can be suitably sandwiched by the pair of reinforcing metal fittings 10.
Specifically, in the thin part of the pillar P, the amount of tightening is increased so that the nut 22 is tightened to the back of the bolt 21, and in the thick part of the pillar P, the amount of tightening of the nut 22 to the bolt 21 is small. By adjusting so as to, the pair of reinforcing metal fittings 10 (contact plate portion 12) are brought into line contact with the pillar P along the longitudinal direction of the pillar P, and the pillar P is suitably sandwiched by the pair of reinforcing metal fittings 10. be able to.
For example, in the case of a reinforcing metal fitting formed so as to be in surface contact with the peripheral surface of a column, such as a reinforcing metal fitting of the prior art, if the curvature of the peripheral surface of the column and the curvature of the inner surface of the reinforcing metal fitting do not match, The pinching of columns by a pair of reinforcing metal fittings becomes unstable.
On the other hand, if the contact plate portion 12 of the reinforcing metal fitting 10 is configured to make line contact with the pillar P as in the present embodiment, the tightening amount of the nut 22 screwed to the bolt 21 is adjusted. By doing so, the pillar P can be suitably sandwiched by the pair of reinforcing metal fittings 10, so that the pillar P can be suitably reinforced by the pair of reinforcing metal fittings 10.

Both ends of the fastening member 20 (bolts 21 and nuts 22) are housed in the space R between the contact plate portion 12 and the long plate portion 11 so as not to protrude from the outer peripheral surface of the reinforcing metal fitting 10.
If the fastening member 20 (bolt 21, nut 22) protrudes from the outer peripheral surface of the reinforcing metal fitting 10, not only the appearance of the column reinforcing structure 100 is spoiled, but also the worker may come into contact with the protruding portion. Therefore, it is preferable that both ends of the fastening member 20 are housed in the space R between the contact plate portion 12 and the long plate portion 11.

In this way, the column reinforcing structure 100 can be constructed by attaching the pair of reinforcing metal fittings 10 to the column P by the fastening member 20 and fastening the pair of reinforcing metal fittings 10 so as to sandwich the column P.
In the present embodiment, as shown in FIGS. 1A and 1B, the ground G around the base of the pillar P is dug by about 30 cm, and a pair of reinforcing metal fittings 10 are tightened and attached to the pillar P, and then the ground G is attached. It is backfilled, and the lower part of the column reinforcement structure 100 is constructed in a state of being buried in the ground.
The lower part of the pillar P is embedded up to about 200 cm in the ground, and a root shackle or the like is provided in the lower part of the pillar P. Therefore, when attaching the pair of reinforcing metal fittings 10 to the pillar P, the pillar There is no problem in digging the ground G around the root of P by about 30 cm.

As described above, the column reinforcing structure 100 of the present embodiment can be constructed with good workability by fastening the pair of reinforcing metal fittings 10 installed so as to lean against the column P with the fastening member 20. In particular, since the reinforcing metal fitting 10 can be carried by two workers, the column reinforcing structure 100 can be constructed by attaching the reinforcing metal fitting 10 to the column P without using heavy machinery or the like.

Then, as shown in FIG. 2, the column reinforcing structure 100 has a double structure consisting of an abutting plate portion 12 that abuts on the peripheral surface of the column P and a long plate portion 11 that is arranged at a position away from the column P. Therefore, it has a higher reinforcing strength than a column reinforcing structure having a single-layer structure as in the prior art.
In particular, since the space R having a polygonal cross-sectional view (here, a pentagonal shape in cross-sectional view) is formed between the contact plate portion 12 and the long plate portion 11, the contact plate portion 12 and the long plate portion 11 are formed. Since the double structure formed by the above becomes a stable three-dimensional structure, the column P can be satisfactorily reinforced by the column reinforcing structure 100.

As described above, the column reinforcing structure 100 formed by fastening the pair of reinforcing metal fittings 10 by the fastening member 20 can be constructed with good workability, and is a double structure having a stable three-dimensional structure consisting of the contact plate portion 12 and the long plate portion 11. Since it has a high reinforcing strength due to the above, the column P can be satisfactorily reinforced by the column reinforcing structure 100.

The present invention is not limited to the above embodiment.
For example, as shown in FIG. 4 (a), a space R having a triangular cross-sectional view may be formed between the contact plate portion 12 and the long plate portion 11, and FIG. 4 (b) shows. As shown, a space R having a rectangular cross-sectional view may be formed between the contact plate portion 12 and the long plate portion 11.
Even with such a column reinforcing structure 100, the column P is satisfactorily reinforced because it has a high reinforcing strength due to the double structure of a stable three-dimensional structure consisting of the contact plate portion 12 and the long plate portion 11. be able to.

Further, as shown in FIG. 5, the reinforcing metal fitting 10 may have the same dimensions as the width of the upper end portion and the width of the lower end portion.
The reinforcing metal fitting 10 shown in FIG. 5 is formed, for example, to have a length of 300 cm, a width of an upper end portion of 30 cm, and a width of a lower end portion of 30 cm.
The reinforcing metal fitting 10 is formed so as to correspond to a columnar column P having the same diameter on the upper end side and the lower end side.
Then, the column reinforcing structure 100 can be constructed with good workability by leaning the reinforcing metal fitting 10 against the columnar column P and fastening the column P with the pair of reinforcing metal fittings 10 sandwiched by the fastening member 20.

It should be noted that the column P having a taper that tapers toward the upper end can be reinforced by the reinforcing metal fitting 10 having the same width of the upper end portion and the width of the lower end portion as shown in FIG.
In this case, on the upper end side where the diameter of the pillar P is small, the amount of tightening is increased so that the nut 22 is tightened to the back of the bolt 21, and on the lower end side where the diameter of the pillar P is large, the nut 22 is tightened to the bolt 21. By adjusting so as to reduce the amount of filling, a pair of reinforcing metal fittings 10 are brought into line contact with the column P along the longitudinal direction of the column P, and the column P is suitably sandwiched by the pair of reinforcing metal fittings 10. 100 can be built.

(Embodiment 2)
Next, the second embodiment of the column reinforcement structure and the method of constructing the column reinforcement structure according to the present invention will be described. The same parts as those in the first embodiment are designated by the same reference numerals, and only different parts will be described.

As shown in FIG. 6, a hanging portion 13 is provided at the upper end portion of the reinforcing metal fitting 10.
The hanging portion 13 is a metal member having a substantially inverted U shape, and is fixed to the upper outer surface of the elongated plate portion 11 by welding.
When the reinforcing metal fitting 10 provided with the hanging portion 13 is attached to the column P, the hanging metal fitting 30 (see FIGS. 7A, 7B, 7C) is used.

As shown in FIGS. 7A, 7B, and 7C, the hanging metal fitting 30 has a pair of hook portions 32.
Specifically, the hanging metal fitting 30 includes a pair of fixing metal fittings 31 connected by bolts B and nuts N, and a hook portion 32 fixed to the outer surface of each fixing metal fitting 31.

The fixing bracket 31 is a member having a substantially semi-cylindrical shape, and the diameter of the inner surface thereof is formed to be substantially the same as the diameter on the upper end side of the pillar P. Specifically, when the reinforcing metal fitting 10 is leaned against the pillar P, the fixing metal fitting 31 is formed corresponding to the diameter of the pillar P around the upper end of the reinforcing metal fitting 10 (for example, 270 cm to 300 cm from the ground). There is.
The hook portion 32 is a metal member fixed by welding at substantially the center of the outer surface of the fixing bracket 31.

When the reinforcing metal fitting 10 of the second embodiment is attached to the pillar P, first, the hanging metal fitting 30 is placed at a predetermined position of the pillar P (for example, a place where the upper end portion of the reinforcing metal fitting 10 hits when the reinforcing metal fitting 10 is leaned against the pillar P). Fasten with bolt B and nut N to fix.
Next, the hanging portion 13 of the reinforcing metal fitting 10 is hung on the hook portion 32 of the hanging metal fitting 30 arranged at a predetermined position of the pillar, and the pair of reinforcing metal fittings 10 are installed so as to be hung along the pillar P.
At this time, the ground G around the base of the pillar P is dug by about 30 cm.

Next, a pair of reinforcing metal fittings 10 in a state where the hanging portion 13 is hung on the hook portion 32 of the hanging metal fitting 30 arranged on the pillar P are attached to the pillar P by the fastening member 20 (bolts 21 and nuts 22), and a pair. The column reinforcing structure 100 can be constructed by tightening and fastening the reinforcing metal fitting 10 of the above toward the column P.
After the pair of reinforcing metal fittings 10 are fastened to the pillar P with the fastening member 20, the ground G is backfilled.

In this way, if the hanging portion 13 is hung on the hook portion 32 of the hanging metal fitting 30 previously arranged on the pillar P and the reinforcing metal fitting 10 is hung on the pillar P, the reinforcing metal fitting 10 will not fall down. Therefore, the pair of reinforcing metal fittings 10 can be easily fastened by the fastening member 20 without supporting the reinforcing metal fittings 10 by a plurality of workers, and the column reinforcing structure 100 in which the column P is sandwiched between the pair of reinforcing metal fittings 10 can be formed. Can be constructed with good workability.

Further, after constructing the column reinforcing structure 100, the hanging metal fitting 30 may be removed from the column P while the hanging metal fitting 30 is still attached to the column P.

In the above embodiment, the fastening member 20 composed of the bolt 21 and the nut 22 is used, but the present invention is not limited to this, and the fastening member is the circumference of the pair of reinforcing metal fittings 10. It may be a band-shaped metal fitting that is wound around a surface and fixed so as to fasten the pair of reinforcing metal fittings 10 to the pillar P, a band-shaped band member, or the like.

In addition, it goes without saying that the specific detailed structure and the like can be changed as appropriate.

10 Reinforcing metal fittings 11 Long plate part 11a Opening 12 Contact plate part 12a Small hole 13 Hanging part 20 Fastening member 21 Bolt 22 Nut 30 Hanging metal fittings 31 Fixing metal fittings 32 Hook part 100 Pillar reinforcement structure P Pillar R Space G Ground B Bolt N Nut

Claims (4)

It is a column reinforcement structure in which a column having a substantially circular cross section is reinforced with a pair of reinforcing metal fittings and a fastening member that tightens the pair of reinforcing metal fittings facing each other with the column sandwiched toward the column.
The reinforcing metal fitting is
A long plate portion arranged along the pillar at a position away from the pillar,
A contact plate portion that is fixed to both sides of the long plate portion in the width direction and is in contact with the pillar, and a contact plate portion.
With
The contact plate portion is fixed so as to form a space between the contact plate portion and the long plate portion.
The fastening member is bridged over the contact plate portion of the pair of reinforcing metal fittings facing each other across the pillar, and both ends of the fastening member are accommodated in the space.
A column reinforcing structure characterized in that the pair of reinforcing metal fittings are fastened by the fastening member so as to sandwich the column. It is a column reinforcement structure in which a column having a substantially circular cross section is reinforced by a pair of reinforcing metal fittings and a hanging metal fitting arranged at a predetermined position of the column.
The reinforcing metal fitting is
A long plate portion arranged along the pillar at a position away from the pillar,
A contact plate portion that is fixed to both sides of the long plate portion in the width direction and is in contact with the pillar, and a contact plate portion.
A hanging part provided at the upper end of the reinforcing metal fitting and
With
The contact plate portion is fixed so as to form a space between the contact plate portion and the long plate portion.
The hanging metal fitting has a pair of hook portions and has a pair of hook portions.
A pillar reinforcing structure, characterized in that the pair of reinforcing metal fittings are fastened so as to sandwich the pillar in a state where the hanging portion is hung on a hook portion of the hanging metal fitting arranged on the pillar. The column reinforcing structure according to claim 1 or 2 , wherein the space formed between the contact plate portion and the long plate portion exhibits a polygonal cross-sectional view. The method for constructing a column reinforcing structure according to claim 2.
The step of arranging the hanging metal fitting at a predetermined position of the pillar, and
A step of hanging the hanging portion on the hook portion of the hanging metal fitting and installing the pair of reinforcing metal fittings so as to hang them on the pillar.
The process of tightening and fastening the pair of reinforcing metal fittings toward the pillar,
A method of constructing a column reinforcement structure, which is characterized by being equipped with.

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