JP4167167B2 - Reinforcement structure of columnar structure - Google Patents

Description

  The present invention relates to a reinforcing structure for seismically reinforcing columnar structures made of reinforced concrete such as bridge piers and building columns.

  As a method of seismic reinforcement of reinforced concrete columnar structures such as bridge piers and building columns, a reinforcing steel plate is wound around and welded, and a curable filler such as mortar is filled between the columnar structure and the steel plate. There is a way to do it. This method is particularly effective for the bulging output in the radial direction due to the axial compressive force received by the columnar structure due to an earthquake or the like.

  For example, as shown in Patent Document 1, the reinforcing steel plates 2 are not welded to each other, but are joined by using the joints 4 and 5 having a sawtooth cross section, the bolt 6 and the nut 7 and filled with the mortar 3 inside. There are some (see Patent Document 1, FIG. 1). Since this joining method does not perform welding, there is an advantage that quality, particularly strength, hardly varies depending on the technique and weather of the welder, and it can be applied indoors because it does not use fire.

  As a method of winding the reinforcing steel plate 2 around the columnar structure 1, for example, as shown in Patent Literature 1, there is a method using an attachment jig 9 (see Patent Literature 1 and FIG. 2). The mounting jig 9 includes a base 9 a fixed to the base portion 1 a of the columnar structure 1, a steel plate mounting portion 9 b that is rotatably attached to the base 9 a and rotates in a direction to sandwich the columnar structure 1. Consists of.

  First, the mounting jig 9 is assembled and fixed to the columnar structure 1. Next, the reinforcing steel plate 2 is placed on the steel plate placing portion 9b with the inner surface side facing up. In this state, both the steel plate placing portions 9b are raised and the joint portions are joined.

When the height of the columnar structure 1 is high, the assembled reinforcing steel plate 2 is then lifted, and the reinforcing steel plate 2 is assembled in the same manner below. Thereafter, the upper and lower reinforcing steel plates 2 are welded together and filled with mortar 3. After curing, the mounting jig 9 is disassembled.
Japanese Patent No. 3177730

  However, in the above method, since the reinforced steel plate is large, it is expensive to manufacture. Further, in order to raise the reinforcing steel plate, it is necessary to use a machine and a large work space is required, so that workability in a narrow place is poor. Moreover, the operation | work for spreading mortar between a reinforced steel plate and a columnar structure was complicated.

  The subject of this invention is providing the reinforcement structure of the columnar structure which can be constructed manually by a small place.

  In order to solve the above problems, the invention according to claim 1 of the present invention is a reinforcing structure 10 for a columnar structure 1, as shown in FIG. 1 or 2, and follows the outer periphery of the columnar structure 1. Then, the thin ribbon plate 11 that is bent is wound around the outer periphery of the columnar structure 1 to a predetermined thickness, and is bonded to the inner peripheral surface of the end portion at the end of the winding to the outer peripheral surface of the inner portion of the end portion. The material 20 is provided.

  According to the first aspect of the present invention, the thin strip 11 that bends following the outer periphery of the columnar structure 1 is wound around the outer periphery of the columnar structure 1 to a predetermined thickness, and the inner peripheral surface of the end of the winding end. The columnar structure 1 can be reinforced by adhering to the outer peripheral surface of the inner portion of the end portion with the adhesive 20 and the radial direction due to the axial compressive force received by the columnar structure 1 can be increased. Can counter bulge output. In addition, since the end of the ribbon strip 11 is bonded with the adhesive 20, welding is not required, quality, especially strength is unlikely to vary depending on the welder's technique and weather, and no fire is used. But construction is possible. Moreover, since it is not necessary to spread mortar between the strip 11 and the columnar structure 1, facilities, such as a concrete pressure-feed vehicle, are unnecessary, and since there is no curing period, a construction period can be shortened.

  As shown in FIG. 3 or 4, the invention described in claim 2 is a reinforcing structure 10 for the columnar structure 1, which is bent along the outer periphery of the columnar structure 1, and the ends are bonded to each other. 20 and is bent along the outer periphery of the inner ribbon plate 11 to the outside of the ribbon plate 11 formed in an annular shape along the outer periphery of the columnar structure 1, and the end portions thereof are bonded together by the adhesive 20. The thin strip plate 11 which is bonded and formed in an annular shape along the outer periphery of the inner thin strip plate 11 is provided to be overlapped to a predetermined thickness.

  According to the invention described in claim 2, the thin strip 11 is bent along the outer periphery of the columnar structure 1, the ends are bonded to each other with the adhesive 20, and formed in an annular shape along the outer periphery of the columnar structure 1. Then, another ribbon plate 11 is bent on the outer side along the outer periphery of the inner ribbon plate 11, the end portions are bonded to each other with the adhesive 20, and are annularly formed along the outer periphery of the inner ribbon plate 11. The columnar structure 1 can be reinforced by forming and overlapping until the thickness of the strips 11 reaches a predetermined thickness, and the radial direction due to the axial compressive force received by the columnar structure 1 It can counter the bulging output to. Moreover, since the thin strip 11 is bent along the outer periphery of the columnar structure 1 or the inner thin strip 11 at the site, a gap generated between the columnar structure 1 and the thin strip 11 or between the thin strips 11. Can be minimized.

  Further, since the end portions of the thin strip plate 11 are bonded to each other with the adhesive 20 and formed into an annular shape, the thin strip plate 11 can be made small, and can be easily carried into the site. Also, since the end of the ribbon strip 11 is bonded with the adhesive 20, welding is not required, quality, especially strength is less likely to vary depending on the welder's technology and weather, and it is also used indoors because it does not use fire. it can.

  The invention according to claim 3 is the reinforcing structure 10 for the columnar structure 1 according to claim 1 or 2, wherein the inner peripheral surface of the thin strip plate 11 and the thin strip 11 that is one inner side than the inner peripheral surface. An adhesive 20 for bonding the outer peripheral surface of the columnar structure 1 is provided at a predetermined interval in the circumferential direction of the columnar structure 1.

  According to the invention described in claim 3, the adhesive 20 that bonds the inner peripheral surface of the thin strip plate 11 and the outer peripheral surface of the thin strip plate 11 that is one inner side from the inner peripheral surface is provided on the columnar structure 1. By providing at a predetermined interval in the circumferential direction, it is possible to more reliably prevent the thin strip plate 11 wound around the columnar structure 1 from loosening.

The invention described in claim 4 is the reinforcing structure 10 of the pillar structure 1 according to any one of claims 1 to 3 inner peripheral surface and the columnar structure of the first rotation part of the thin strip 11 An adhesive 20 is provided for bonding the outer peripheral surface of the object 1 and fixing the thin strip 11.

According to the invention described in claim 4 , by bonding the inner peripheral surface of the first round portion of the thin strip plate 11 and the outer peripheral surface of the columnar structure 1 with the adhesive 20, and fixing the thin strip plate 11, it is possible to prevent the thin strip 11 is moved in the axial direction of the columnar structure 1.

The invention described in claim 5 is the reinforcing structure 10 of the pillar structure 1 according to any one of claims 1-4, spaced the thin strip 11 in the height direction of the columnar structure 1 And providing a plurality of them.

According to the invention described in claim 5 , when the strips 11 are provided over the entire length of the columnar structure 1 by providing a plurality of strips 11 at intervals in the height direction of the columnar structure 1. Similarly, it is possible to counter the bulging output in the radial direction due to the axial compressive force received by the columnar structure 1.

  According to the first aspect of the present invention, a thin strip that bends following the outer periphery of the columnar structure is wound around the outer periphery of the columnar structure to a predetermined thickness, and the inner peripheral surface of the end portion of the winding end is wound on the end. The columnar structure can be reinforced by adhering to the outer peripheral surface of the inner portion of the inner part with an adhesive, and resists the bulging output in the radial direction due to the axial compressive force received by the columnar structure. Can do. In addition, since the end of the ribbon strip is bonded with an adhesive, welding is not required, quality, especially strength is unlikely to vary depending on the welder's technology and weather, and it is also used indoors because it does not use fire. it can. Further, since it is not necessary to spread mortar between the strip and the columnar structure, facilities such as a concrete pumping car are unnecessary, and there is no curing period, so the construction period can be shortened.

  According to invention of Claim 2, a thin strip is bent along the outer periphery of a columnar structure, the edge parts are adhere | attached with an adhesive agent, it forms cyclically | annularly along the outer periphery of a columnar structure, and the outer side Bend another ribbon strip along the outer periphery of the inner ribbon strip, bond the ends together with an adhesive, and form an annular shape along the outer periphery of the inner strip strip. By providing the stacked layers until the thickness reaches a predetermined thickness, it is possible to reinforce the columnar structure and to counter the bulging output in the radial direction due to the axial compressive force received by the columnar structure. In addition, since the strip is bent along the outer periphery of the columnar structure or the inner strip in the field, the gap generated between the columnar structure and the strip or between the strips must be minimized. Can do.

  In addition, since the end portions of the ribbon plate are bonded to each other with an adhesive and formed into an annular shape, the ribbon plate can be made small and can be easily carried into the site. In addition, since the end of the ribbon is bonded with an adhesive, welding is not required, quality, especially strength is less likely to vary depending on the welder's technique and weather, and it can be used indoors because it does not use fire.

  According to the third aspect of the present invention, the adhesive that bonds the inner peripheral surface of the thin strip and the outer peripheral surface of the thin strip that is one turn inside the inner peripheral surface is predetermined in the circumferential direction of the columnar structure. By providing at intervals, it is possible to more reliably prevent the thin strip wound around the columnar structure from being loosened.

According to the invention described in claim 4, and an outer peripheral surface of the inner peripheral surface and the columnar structures first rotation portion of the thin strip is bonded by adhesive, by fixing the thin strip, a thin strip It can prevent moving to the axial direction of a columnar structure.

According to the invention described in claim 5, a thin strip is more provided that at intervals in the height direction of the columnar structure, similarly to the case in which the thin strip over the entire length of the columnar structure, columnar It is possible to counter the bulging output in the radial direction due to the axial compressive force received by the structure. For this reason, since a smaller member can be used compared with the case where a thin strip is provided for the entire columnar structure, the material cost can be suppressed, and the work can be performed manually without using a machine even in a narrow place. .

Hereinafter, embodiments of the present invention will be described in detail.
1 and 2 are views showing a first embodiment of the present invention. The reinforcing structure 10 of the columnar structure 1 is fixed in a state where the strip 11 is wound around the outer periphery of the columnar structure 11 and the strip 11 wound around the outer periphery of the columnar structure 1 made of, for example, reinforced concrete. It consists of an adhesive 20.

  The thin strip 11 is wound around the outer periphery of the columnar structure 1 by human power with one end fixed to the outer peripheral surface of the columnar structure 1. The thin strip 11 is wound until the thickness is sufficient to reinforce the columnar structure 1. When the thin strip 11 is thin, it is necessary to increase the number of windings. However, since the bending strength of the thin strip 11 is reduced, it can be easily wound along the outer periphery of the columnar structure 1. When the thin strip 11 is thick, a small number of windings is sufficient.

  As the thin strip 11, one that can be easily bent by human power can be used. For example, a strip-shaped steel plate having a thickness of about 1 mm or less can be used. As the thin strip plate 11, any other material such as a painted or plated steel material or a stainless steel plate can be used. The thickness and width of the ribbon strip 11 are determined by workability such as carrying.

  The adhesive material 20 is provided on the inner peripheral surface of the thin strip 11 and is provided at a predetermined interval, for example, every half or one round, at a winding start portion, a winding end portion, a portion in between, and the like. An adhesive 20 provided in the first round of the thin strip 11 fixes the thin strip 11 to the columnar structure 1. The adhesive 20 provided for the second transition prevents the thin strip 11 from being loosened and the thin strip 11 from being displaced downward. Alternatively, the adhesive 20 may be provided on the entire inner peripheral surface of the thin strip plate 11.

  The adhesive 20 can be provided by applying, for example, an acrylic or epoxy adhesive, but is not limited thereto.

  Below, the method to provide the reinforcement structure 10 of the columnar structure 1 of this Embodiment is demonstrated. First, the thin strip 11 and the adhesive 20 are carried into the site where the columnar structure 1 is located. The thin strip plate 11 may carry in a flat plate shape or a roll shape plate.

  Next, the thin strip plate 11 is wound around the columnar structure 1. The adhesive 20 is provided at one end of the thin strip 11, the adhesive 20 is adhered to the outer peripheral surface of the columnar structure 1, and one end of the thin strip 11 is fixed to the columnar structure 1. The thin strip 11 is wound around the columnar structure 1 from the fixed position. At this time, the adhesive strip 20 is provided on the inner peripheral surface of the thin strip plate 11 at a predetermined interval, for example, half or one round, and bonded to the outer peripheral surface on the inner side of the thin strip plate 11 so that the wound thin strip plate 11 is It can prevent sagging.

  When the thin strip 11 is wound to the end, an adhesive 20 is provided on the inner peripheral surface of the end of the thin strip 11 to be bonded to the inner peripheral surface of the thin strip 11 and wound. The slack of the strip 11 is prevented. If the winding thickness sufficient to reinforce the columnar structure 1 cannot be obtained only by winding a single thin strip 11, the thin strip is similarly applied to the outer peripheral surface of the wound thin strip 11. 11 is wound. This is repeated until the winding thickness is sufficient to reinforce the columnar structure 1. The reinforcing structure 10 of the columnar structure 1 is completed through the above process.

  The winding of the strip plate 11 may be performed only at one place, but at a predetermined interval in the height direction of the columnar structure 1 according to the height of the columnar structure 1, the width of the strip strip 11, the winding thickness, and the like. It may be provided, or may be provided continuously without a gap. Further, the strip 11 may be spirally wound around the columnar structure 1. With the reinforcing structure 10 of the columnar structure 1 provided as described above, it is possible to counter the bulging output in the radial direction due to the axial compressive force received by the columnar structure 1.

  In the first embodiment of the present invention, the thin strip 11 is manually wound around the columnar structure 1, and the adhesive 20 is provided on the inner peripheral surface of the end of the winding to be one turn inside the end. By adhering to the outer peripheral surface of the part, the reinforcing structure 10 of the columnar structure 1 can be easily formed, and construction can be performed even when the construction space cannot be secured sufficiently inside the building or on the pier. Further, since the thin strip 11 is wound directly around the columnar structure 1 to reinforce it, there is no need to fill a mortar or other filler between the thin strip 11 and the columnar structure 1, which saves space, and after reinforcement. The space around can be used effectively.

  Alternatively, as shown in FIG. 3 or FIG. 4, the flat strip 11 is bent into a shape along the outer periphery of the columnar structure 1, and the thin strip 11 is disposed along the outer periphery of the columnar structure 1. The ends may be bonded together with the adhesive 20 to form the annular reinforcing structure 10. The ribbon strip 11 can be bent using a manual folding machine.

  In addition, another ribbon plate 11 is bent along the outer periphery of the inner ribbon plate 11 on the outer side of the ribbon plate 11 provided along the outer periphery of the columnar structure 1, and the ends are bonded to each other with the adhesive 20. May be formed in an annular shape along the outer periphery of the inner ribbon plate 11, and may be provided until the thickness of the ribbon plate 11 is sufficient to reinforce the columnar structure 1. . Also, an adhesive 20 is provided between the inner ribbon plate 11 and the outer ribbon plate 11, and the outer peripheral surface of the inner ribbon plate 11 and the inner peripheral surface of the outer ribbon plate 11 are bonded. Also good.

  The folded shape of the ribbon plate 11 may be a U-shaped horizontal section as shown in FIG. 3, or may be an L-shaped horizontal section as shown in FIG. It can be made into arbitrary shapes according to the outer periphery shape of the thing 1. FIG.

  By bonding the end portions of the thin strip plate 11 with the adhesive 20 to form an annular shape, the thin strip plate 11 can be made small and can be easily carried into the site. Further, the gap between the columnar structure 1 and the thin strip plate 11 can be minimized by bending the thin strip 11 into a shape along the outer periphery of the columnar structure 1 at the site.

  In the present embodiment, the columnar structure 1 can be reinforced simply by carrying the necessary number of thin strips 11, a folding machine, and an adhesive, so that a store or the like can be used in the columnar structure 1 in the building. The reinforcement structure 10 can be installed even in a place that is nearby and where there is not enough space for the reinforcement structure 10 itself or sufficient space for the reinforcement structure. In addition, since the work in the daytime hinders the sales of the store or the like, the reinforcement work of the columnar structure 1 in the vicinity of the store or the like is performed in a short time at night.

In addition, the above embodiment is applicable also to reinforcement of columnar structures other than the pillar of a building, for example, reinforced concrete structures, such as a bridge pier. Of course, other specific detailed structures such as the material, thickness, width, and length of the ribbon plate 11 can be changed.

It is a perspective view which shows the form example of the reinforcement structure of the columnar structure of this invention. It is a horizontal sectional view showing an example of a form of reinforcement structure of a columnar structure of the present invention. It is a horizontal sectional view showing an example of a form of reinforcement structure of a columnar structure of the present invention. It is a horizontal sectional view showing an example of a form of reinforcement structure of a columnar structure of the present invention .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Columnar structure 10 Reinforcement structure 11 Thin strip 20 Adhesive

Claims (5)

  A thin strip that bends following the outer periphery of the columnar structure is wound around the outer periphery of the columnar structure up to a predetermined thickness, and the outer periphery of the inner part of the inner end of the end of the winding is one round from the end. A reinforcing structure for a columnar structure, characterized in that an adhesive for adhering to a surface is provided.   It is bent along the outer periphery of the columnar structure, and the ends are bonded to each other with an adhesive, and is formed on the outer periphery of the ribbon plate formed in an annular shape along the outer periphery of the columnar structure. A thin ribbon plate that is bent along the outer periphery and formed in an annular shape along the outer periphery of the inner thin ribbon plate is overlapped to a predetermined thickness. Reinforcing structure for columnar structures.   The adhesive for adhering the inner peripheral surface of the thin strip and the outer peripheral surface of the thin strip that is one turn inside the inner peripheral surface is provided at predetermined intervals in the circumferential direction of the columnar structure. 3. A reinforcing structure for a columnar structure according to 1 or 2. Bonds the outer peripheral surface of the inner peripheral surface and the columnar structures first rotation portion of the thin strip, any one of claim 1 to 3, characterized in that a bonding material for fixing the thin strip Reinforcement structure of the columnar structure described in 1. The reinforcing structure for a columnar structure according to any one of claims 1 to 4 , wherein a plurality of the thin strip plates are provided at intervals in the height direction of the columnar structure.

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