JP5525475B2 - Reinforcement structure of existing reinforced concrete wall and reinforcement method of existing reinforced concrete wall - Google Patents

Description

  The present invention relates to a reinforcing structure and a reinforcing method for an existing reinforced concrete wall.

Some existing reinforced concrete walls have a high probability of shear failure when subjected to large seismic forces.
In recent years, such reinforced concrete walls may be reinforced so as not to cause shear failure.

  As a conventional method of reinforcing reinforced concrete walls, the main reinforcement and distribution reinforcing bars are arranged along the surface of the reinforced concrete wall, and a thickening method for placing concrete, or a steel plate is placed on the surface of the reinforced concrete wall, A steel plate reinforcement method has been employed in which a gap between the reinforced concrete wall and the steel plate is filled with a filler such as mortar or resin.

  However, these methods cause various inconveniences such as an increase in the wall thickness after reinforcement and a decrease in the internal cross section of the housing (for example, in the case of a water and sewage purification facility, The capacity and processing capacity will decrease, and in the case of subways, it will not be possible to use it because it will not satisfy the building limits).

  Therefore, the present applicant, as a shear reinforcement method applicable to the existing reinforced concrete wall, drilled the reinforcing member insertion hole in the member thickness direction of the existing reinforced concrete wall, and fixing members were fixed to both ends of the reinforcing member insertion hole. A shear reinforcement structure in which a shear reinforcement bar is arranged and a filler is filled has been disclosed and has been put into practical use (for example, see Patent Document 1).

  Reinforcing member insertion holes are located between adjacent main reinforcing bars and between the distributing reinforcing bars so as not to damage existing main reinforcing bars and distributing reinforcing bars (rectangular shape surrounded by main reinforcing bars and distributing reinforcing bars) It is formed in the center of the space. Therefore, the shear reinforcing bar is arranged in an independent state from the main reinforcing bar and the distributed reinforcing bar without being locked to the existing main reinforcing bar or the distributed reinforcing bar.

JP 2005-105808 A

  Although the conventional shear reinforcement structure can secure deformation performance equivalent to the deformation level until the main reinforcement buckles due to the shear reinforcement reinforcement, the shear reinforcement reinforcement is independent of the main reinforcement, so the yield strength is greatly reduced. It was not possible to suppress the buckling of the main rebar, which is the cause of the failure.

  From such a point of view, the present invention provides a reinforcing structure and a reinforcing method for an existing reinforced concrete wall capable of suppressing the buckling of the main reinforcing bar caused by repeated loading while performing shear reinforcement of the existing reinforced concrete wall. The issue is to provide.

  In order to solve the above-described problems, the reinforcing structure of an existing reinforced concrete wall according to the present invention is a reinforcing structure of an existing reinforced concrete wall in which main reinforcing bars and distributing reinforcing bars are arranged on one side and the other side of the wall. A bottomed first reinforcing member insertion hole drilled from one surface side toward the other surface side, a first reinforcing member inserted into the first reinforcing member insertion hole, and the first reinforcing member insertion hole A filler filled in a gap between the inner wall surface and the first reinforcing member, a bottomed second reinforcing member insertion hole drilled from the other surface side toward the one surface side, and the second reinforcing member insertion A second reinforcing member inserted into the hole, and a filler filled in a gap between the inner wall surface of the second reinforcing member inserting hole and the second reinforcing member, and a bottom surface of the first reinforcing member inserting hole Is located on one side of the main reinforcing bar and the distribution reinforcing bar on the other side, and the first reinforcing member A first wire rod and a first locking portion formed at an end portion on one surface side of the first wire rod and locked to the main reinforcing bar on the one surface side, and the second reinforcing member insertion hole Is located on the other side of the main reinforcing bar and the distribution reinforcing bar on the one side, and the second reinforcing member is formed on the second wire and the end of the other side of the second wire. It has the 2nd latching | locking part latched by the main reinforcing bar of the said other surface side, It is characterized by the above-mentioned.

According to the reinforcement structure of the existing reinforced concrete wall, since the first reinforcement member and the second reinforcement member are arranged so as to be locked to the existing main reinforcement, the buckling of the main reinforcement that occurs when a repeated load is applied. Can be suppressed.
In addition, since the reinforcing member and the existing reinforced concrete wall are integrated with each other through the filler, the reinforcing member and the existing reinforced concrete wall integrally resist the diagonal tensile force generated when a shearing force is generated in the existing reinforced concrete wall. , Shear strength is improved.

  Further, if the second reinforcing member is disposed between the first reinforcing members that are vertically adjacent to each other, the first reinforcing member inserted from one side and the second reinforcing member inserted from the other side are provided. , And can be arranged at predetermined positions without interfering with each other.

  The first reinforcing member includes a plurality of the first wire rods, and the plurality of first wire rods are inserted into the first reinforcing member insertion holes which are different from each other and are interposed via the first locking portions. The second reinforcing member includes a plurality of the second wire rods, and the plurality of second wire rods are inserted into the different second reinforcing member insertion holes and the second locking portions. It may be connected via.

The first locking portion is a plate material fixed to the base end of the first wire rod, and the second locking portion is a plate material fixed to the base end of the second wire rod. Also good.
Further, a claw portion may be formed at an end portion of the plate material.

  The reinforcing method of an existing reinforced concrete wall according to the present invention is a reinforcing method of an existing reinforced concrete wall in which main reinforcing bars and distribution reinforcing bars are arranged on one side and the other side of the wall, respectively, A first reinforcing step for suspending the covered concrete on one side until the main reinforcing bar on the one side is exposed, and drilling the existing reinforced concrete wall from one side to the other side to form a bottomed first reinforcing member A first drilling step for forming an insertion hole; a first reinforcement member arranging step for inserting a first reinforcement member into the first reinforcement member insertion hole and filling a filler; and a first reinforcement member on one surface side of the existing reinforced concrete wall. After the first restoration step of installing the one-section restoration material and the curing of the first section restoration material, the covering concrete on the other surface side of the existing reinforced concrete wall is suspended until the main reinforcement on the other surface side is exposed. And a second drilling step for drilling the existing reinforced concrete wall from the other surface side to the one surface side to form a bottomed second reinforcing member insertion hole, and a second reinforcing member insertion hole. A second reinforcing member placement step of inserting a second reinforcing member and filling the filler, and a second repairing step of installing a second cross-section repairing material on the other surface side of the existing reinforced concrete wall, the first In the drilling step, the first reinforcing member insertion hole is formed so that the bottom surface of the first reinforcing member insertion hole is located on one side of the main reinforcing bar and the distribution reinforcing bar on the other surface side, and the second cutting member is formed. In the hole step, the second reinforcing member insertion hole is formed so that the bottom surface of the second reinforcing member insertion hole is located on the other side of the main reinforcing bar and the distribution reinforcing bar on the one surface side, and the first reinforcing member In the arranging step, the first provided at the end portion on the one surface side of the first reinforcing member The said 1st reinforcement member is arrange | positioned so that a stop part may be latched to the main reinforcing bar of the said 1st surface side, and in the said 2nd reinforcement member arrangement | positioning process, the 2nd provided in the edge part of the said 2nd reinforcement member side The second reinforcing member is arranged so that the locking portion is locked to the main reinforcing bar on the other surface side.

According to such a method for reinforcing an existing reinforced concrete wall, it is possible to arrange the reinforcing member in a state of being locked to the main reinforcing bar, and thus it is possible to prevent the main reinforcing bar from protruding due to repeated loads. Become.
Moreover, since the reinforcing member insertion hole is formed after removing the covering concrete, it is possible to visually check the existing reinforcing bar when forming the reinforcing member insertion hole. Therefore, the reinforcing member insertion hole can be formed at a desired position without damaging the existing reinforcing bars.
Moreover, the construction in a state where the structural strength of the existing reinforced concrete wall is maintained can be performed by performing the construction from the other side after the construction from the one side is completed.

  According to the reinforcing structure and the reinforcing method of the existing reinforced concrete wall of the present invention, it is possible to perform shear reinforcement of the existing reinforced concrete wall and to suppress the buckling of the main reinforcing bars caused by repeated loads.

It is a plane sectional view showing the reinforcement structure of the existing reinforced concrete wall concerning a 1st embodiment. It is a X1-X1 arrow view of FIG. (A) is a perspective view which shows a reinforcement member, (b) and (c) are the modifications of (a). (A)-(d) is a plane sectional view which shows each construction step of the reinforcement method of the existing reinforced concrete wall. (A) is a plane sectional view which shows the reinforcement structure of the existing reinforced concrete wall which concerns on 2nd embodiment, (b) is X2-X2 arrow line view of (a). (A) is a perspective view which shows a reinforcement member, (b) is a modification of (a).

<First embodiment>
In the first embodiment, as shown in FIG. 1, a reinforcing structure 1 for an existing reinforced concrete wall 10 that is a structural wall will be described. An existing reinforced concrete wall 10 (hereinafter simply referred to as “RC wall 10”) is provided with main reinforcing bars 11 and distribution reinforcing bars 12 on one side and the other side of the wall.

As shown in FIG. 2, the main reinforcing bars 11 are vertical bars arranged on the RC wall 10 and arranged at a predetermined pitch.
Further, the reinforcing bar 12 is a horizontal bar arranged on the RC wall 10 and arranged at a predetermined pitch.
That is, the main reinforcing bars 11, 11,... And the distribution reinforcing bars 12, 12,.

  The reinforcing structure 1 includes a first reinforcing member insertion hole 20, a first reinforcing member 30, a second reinforcing member insertion hole 40, a second reinforcing member 50, a filler 60, and a cross-sectional repair material 70. Yes.

  The first reinforcing member insertion hole 20 is formed by drilling from one side of the RC wall 10 (right side in FIG. 1) toward the other side (left side in FIG. 1).

The first reinforcing member 30 is inserted into the first reinforcing member insertion hole 20, and the filler 60 is filled in the gap between the inner wall surface of the first reinforcing member insertion hole 20 and the first reinforcing member 30. .
In the present embodiment, cement-based mortar is used as the filler 60. In addition, the material which comprises the filler 60 is not limited.

  The first reinforcing member insertion hole 20 has a cylindrical shape with an inner diameter larger than the outer diameter (width) of the tip fixing portion 33 of the first reinforcing member 30. The cross-sectional shape of the first reinforcing member insertion hole 20 is not limited. Further, the first reinforcing member insertion hole 20 may be partially enlarged as necessary.

The first reinforcing member insertion hole 20 has a bottom, and its bottom surface is located on one side of the main reinforcing bar 11 and the distribution reinforcing bar 12 on the other side.
Further, the opening end of the first reinforcing member insertion hole 20 is located in the vicinity of the power distribution bar 12 on the one surface side.

  In the present embodiment, the plurality of first reinforcing member insertion holes 20 are arranged in a staggered manner (see FIG. 2). That is, the 1st reinforcement member insertion hole 20 is formed every other with respect to the several grid formed by combining the main reinforcement 11 and the distribution reinforcing bar 12 in a grid | lattice form.

  Further, the first reinforcing member insertion hole 20 is formed at a position where a first locking portion 32 described later of the first reinforcing member 30 can be locked to the main reinforcing bar 11.

As shown in FIG. 1, the first reinforcing member 30 is disposed on the RC wall 10 with a part thereof being inserted into the first reinforcing member insertion hole 20.
The plurality of first reinforcing members 30 are arranged in a staggered manner as shown in FIG. In this embodiment, the 1st reinforcement member 30 is arrange | positioned every other with respect to the several grid formed by combining the main reinforcement 11 and the distribution reinforcing bar 12 in a grid | lattice form.

  As illustrated in FIG. 3A, the first reinforcing member 30 includes a first wire 31, a first locking portion 32 formed at one end of the first wire 31, and the first wire 31. A tip fixing portion 33 formed at the other end (the side opposite to the first locking portion 32) is provided.

  The first wire 31 is configured by a deformed reinforcing bar and is inserted into the first reinforcing member insertion hole 20. In addition, if the material which comprises the 1st wire 31 can express sufficient resistance with respect to the diagonal tension which arises when shearing force acts on RC wall 10, it will be limited to a deformed bar. It is not a thing.

The 1st latching | locking part 32 is a steel plate material fixed to the base end of the 1st wire 31, as shown to (a) of FIG. The first wire 31 is fixed to the inner surface of the first locking portion 32 (the surface on the main rebar 11 side).
The plate material that constitutes the first locking portion 32 has a width that is greater than the outer diameter of the first wire 31.

  The surface area of the plate material is larger than the cross-sectional area of the first wire 31. The first locking portion 32 is friction welded using a friction welding machine.

In this embodiment, the 1st wire 31 is being fixed to one short side rather than the center part (centroid) of the rectangular 1st latching | locking part 32. FIG.
In addition, the fixing location with respect to the 1st latching | locking part 32 of the 1st wire 31 is not limited.

The joining method of the 1st latching | locking part 32 and the 1st wire 31 is not limited to friction welding, What is necessary is just integration, for example, such as gas pressure welding and arc welding joining.
The shape of the 1st latching | locking part 32 is not limited to a rectangle, For example, circular, an ellipse, and another polygon may be sufficient.

A claw portion 34 is formed on the inner surface of the first locking portion 32 (plate material).
In the present embodiment, the claw portion 34 is formed along the outer edge of the short side of the other side of the first locking portion 32 (the side opposite to the first wire 31).

  As shown in FIG. 1, the claw portion 34 has a height that is approximately the same as the outer diameter of the main reinforcing bar 11, and is arranged at a distance from the base end portion of the first wire rod 31. The first reinforcing member 30 is disposed so as to sandwich the main rebar 11 between the first wire 31 and the claw portion 34.

  In addition, the structure of the nail | claw part 34 is not limited, For example, by making the reinforcing bar shorter than the 1st wire 31 standing on the inner surface of the 1st latching | locking part 32, as shown in (b) of FIG. It may be formed, or may be formed by bending the end portion of the plate material inward as shown in FIG. Moreover, the nail | claw part 34 should just be formed as needed, and may be abbreviate | omitted.

  The tip fixing unit 33 has a width dimension larger than the diameter of the first wire rod 31. In the present embodiment, a circular steel plate is configured to be joined to the tip of the first wire 31. In addition, the joining method of the front-end | tip fixing | fixed part 33 is not limited, For example, what is necessary is just to perform by friction welding or welding joining.

  Further, the shape of the tip fixing portion 33 is not limited, and for example, a rectangular steel plate may be adopted as shown in FIG. Further, as the tip fixing unit 33, a nut fixed to the tip of the first wire 31 may be used as the tip fixing unit 33, or the tip of the first wire 31 whose diameter is expanded by forging may be used as the wire end fixing unit 33. The formation method of the fixing unit 33 is not limited.

  As shown in FIG. 1, the second reinforcing member insertion hole 40 is formed by drilling from the other surface side (left side in FIG. 1) to the one surface side (right side in FIG. 1). Yes.

  A second reinforcing member 50 is inserted into the second reinforcing member insertion hole 40, and a filler 60 is filled in a gap between the inner wall surface of the second reinforcing member insertion hole 40 and the second reinforcing member 50. .

The second reinforcing member insertion hole 40 has a bottom, and the bottom surface thereof is positioned on one side of the main reinforcing bar 11 and the distribution reinforcing bar 12 on the one side.
Further, the other surface side of the second reinforcing member insertion hole 40 is located in the vicinity of the power distribution bar 12 on the other surface side.

  In the present embodiment, the plurality of second reinforcing member insertion holes 40, 40,... Are arranged in a staggered manner as shown in FIG. That is, the second reinforcing member insertion holes 40 are formed alternately with respect to a plurality of grids formed by combining the main reinforcing bars 11 and the distribution reinforcing bars 12 in a lattice shape, and the second, upper, lower, left and right are first. It is surrounded by one reinforcing member insertion hole 20.

  Further, the second reinforcing member insertion hole 40 is formed at a position where a second locking portion 52 to be described later of the second reinforcing member 50 can be locked to the main reinforcing bar 11.

  As shown in FIG. 1, the second reinforcing member 50 is disposed on the RC wall 10 with a part thereof being inserted into the second reinforcing member insertion hole 40.

  The plurality of second reinforcing members 50 are arranged in a staggered manner (see FIG. 2). In the present embodiment, the second reinforcing members 50 are arranged alternately with respect to a plurality of grids formed by combining the main reinforcing bars 11 and the distribution reinforcing bars 12 in a grid pattern, The reinforcing member 30 is arranged in a grid different from the grid in which the reinforcing member 30 is arranged. That is, the second reinforcing member 50 is disposed between the first reinforcing members 30 and 30 adjacent to each other in the vertical direction, and is disposed between the first reinforcing members 30 and 30 disposed on the left and right.

As shown in FIG. 3A, the second reinforcing member 50 includes a second wire 51, a second locking portion 52 formed at one end of the second wire 51, and the second wire 51. A tip fixing portion 53 formed at the other end (the side opposite to the second locking portion 52) is provided.
The details of the second reinforcing member 50 are the same as those of the first reinforcing member 30, and thus detailed description thereof is omitted.

The cross-section repair material 70 is a mortar coated on the outer surface of the main reinforcing bar 11 and the distribution reinforcing bar 12, and restores the covered concrete suspended during construction.
In addition, the material which comprises the cross-section repair material 70 is not limited.

Next, a method for reinforcing the RC wall 10 according to the first embodiment will be described.
The reinforcing method includes a first lifting process, a first drilling process, a first reinforcing member arranging process, a first repairing process, a second lifting process, a second drilling process, and a second reinforcing member arranging. A process and a second repair process.

  As shown in FIG. 4A, the first suspension process is a process in which the covered concrete 13 on the one surface side of the RC wall 10 is suspended until at least a part of the main reinforcing bar 11 on the one surface side is exposed. In this embodiment, it is assumed that the reinforcing reinforcing bars 12 are exposed, but the reinforcing reinforcing bars 12 are not necessarily exposed.

  In the first drilling step, as shown in FIG. 4B, the RC wall 10 is drilled from one surface side to the other surface side to form a bottomed first reinforcing member insertion hole 20. is there.

The drilling holes of the first reinforcing member insertion hole 20 are close to the main reinforcing bar 11 while checking the positions of the exposed main reinforcing bar 11 and the distribution reinforcing bar 12 visually and taking care not to damage both reinforcing bars. To form.
Further, the first reinforcing member insertion hole 20 is formed so that the bottom surface thereof is located on one side of the main reinforcing bar 11 and the distribution reinforcing bar 12 on the other side.

  Drilling of the first reinforcing member insertion hole 20 is performed using a drilling means such as an impact drill, a rotary hammer drill, or a core drill. In the present embodiment, the first reinforcing member insertion hole 20 is drilled perpendicular to the wall surface of the RC wall 10 so as to be horizontal. In addition, the 1st reinforcement member insertion hole 20 does not necessarily need to be horizontal, and does not need to form perpendicularly | vertically with respect to a wall surface.

  The first reinforcing member arranging step is a step of inserting the first reinforcing member 30 into the first reinforcing member insertion hole 20 and filling the filler 60 as shown in FIG.

  In the first reinforcing member arranging step, the first reinforcing member 30 is arranged so that the first engaging portion 32 provided at the end portion on the one surface side of the first reinforcing member 30 is engaged with the main reinforcing bar 11 on the one surface side.

  The filling material 60 may be injected into the first reinforcing member insertion hole 20 before the first reinforcing member 30 is inserted into the first reinforcing member insertion hole 20, or the first reinforcing member insertion hole 20 may be filled with the first reinforcing member 30. You may carry out after inserting the reinforcement member 30. FIG.

  The first repairing step is a step of installing a cross-sectional repair material 70 (first cross-sectional repair material 71) on one surface side of the RC wall 10, as shown in FIG. 4 (d).

  The first cross-section repair material 71 is installed by applying mortar so that the first cross-section restoration material 71 has the same thickness as the covered concrete 13 removed in the suspension process.

With the first cross-section repair material 71, the main reinforcing bar 11, the distribution reinforcing bar 12, and the first reinforcing member 30 are embedded in the RC wall 10.
When the application of the first cross-section repair material 71 is completed, curing is performed until a predetermined strength is developed.

  The second suspending step is a step of suspending the covered concrete 13 on the other surface side of the RC wall 10 after the first cross-section repair material 71 is cured until the main reinforcing bar 11 on the other surface side is exposed. The details of the second suspension process are the same as the first suspension process shown in FIG.

  The second drilling step is a step of forming the bottomed second reinforcing member insertion hole 40 by drilling the RC wall 10 from the other surface side toward the one surface side.

The drilling hole of the second reinforcing member insertion hole 40 is close to the main reinforcing bar 11 while checking the positions of the exposed main reinforcing bar 11 and the distribution reinforcing bar 12 by visual observation and taking care not to damage both reinforcing bars. To form.
In the second drilling step, the second reinforcing member insertion hole 40 is formed so that the bottom surface of the second reinforcing member insertion hole 40 is located on the other side of the main reinforcing bar 11 and the distribution reinforcing bar 12 on the one surface side.

  Since the formation method of the 2nd reinforcement member insertion hole 40 is the same as the formation method of the 1st reinforcement member insertion hole 20 shown in FIG.4 (b), detailed description is abbreviate | omitted.

The second reinforcing member arranging step is a step of inserting the second reinforcing member 50 into the second reinforcing member insertion hole 40 and filling the filler 60.
In the second reinforcing member arranging step, the second reinforcing member 50 is arranged so that the second engaging portion 52 provided at the end portion on the other surface side of the second reinforcing member 50 is engaged with the main reinforcing bar 11 on the other surface side. To do.

  In addition, the arrangement method of the second reinforcing member 50 and the filler 60 is the same as that of the first reinforcing member 30 and the filler 60 shown in FIG.

  The second repair process is a process of installing the cross-section repair material 70 (second cross-section repair material 72) on the other surface side of the RC wall 10.

  According to the reinforcement structure of the existing reinforced concrete wall and the reinforcement method of the existing reinforced concrete wall according to the present embodiment, the reinforcement members 30 and 50 are locked to the main reinforcement 11, so that the protrusion of the main reinforcement 11 can be suppressed. That is, since the reinforcing members 30 and 50 restrain the main rebar 11 from the outside (the outer surface side of the wall), even if a repeated load is applied to the RC wall 10 due to an earthquake or the like, the buckling of the main rebar 11 is suppressed. Is done. Therefore, the proof stress of RC wall 10 becomes higher.

In addition, since the reinforcing members 30 and 50 and the RC wall 10 are integrated through the filler 60, they integrally resist the oblique tensile force generated when a shearing force is generated in the RC wall 10. As a result, the shear strength is improved.
Further, by embedding the reinforcing members 30 and 50 inside the RC wall 10, it is possible to realize an increase in shear strength and toughness performance without increasing the member thickness.

  In addition, since the main reinforcing bars 11 are not increased, the out-of-plane shear strength can be improved without increasing the bending strength. You can move to the destructive type.

  In addition, the locking portions 32 and 52 provided at the base end portions of the reinforcing members 30 and 50 and the front fixing portions 33 and 53 provided at the front end portions provide a sufficient fixing effect and provide an out-of-plane shear. When a force is generated, a tensile force acts on the wire rods 31 and 51, so that a supporting pressure acts between the locking portions 32 and 52 and the tip fixing portions 33 and 53, and a compressive stress field is formed in the internal concrete. Therefore, the shear resistance of the inner concrete itself against shearing is increased, and effective shear reinforcement is achieved.

  Further, since the reinforcing member insertion holes 20 and 40 are filled with the filler 60 and the outer surface is shielded by the cross-sectional repair material 70, it is expected to suppress deterioration from the viewpoint of durability after reinforcement.

Since the reinforcing member insertion holes 20 and 40 are drilled in a state where the covering concrete is removed and the main reinforcing bars 11 and the distribution reinforcing bars 12 are exposed, the positioning of the reinforcing member insertion holes 20 and 40 is easy.
Further, since the bottom surfaces of the reinforcing member insertion holes 20 and 40 are located on the base end side with respect to the main reinforcing bar 11 and the distribution reinforcing bar 12 on the distal end side, the existing main reinforcing bars 11 and the distribution force arranged on the distal end side are arranged. Even if the position of the reinforcing bar 12 is shifted, the reinforcing member insertion holes 20 and 40 are not damaged when drilling.

  Since the removal of the covering concrete 13 on the other surface side is performed after the curing of the first cross-section restoration material 71, the covering concrete 13 is not formed on both sides of the one surface side and the other surface side. It can be constructed while maintaining the proper strength.

<Second Embodiment>
In 2nd Embodiment, as shown to (a) of FIG. 5, the existing reinforced concrete which is the structural wall by which the main reinforcement 11 and the distribution reinforcement 12 were arranged on each of the one surface side and other surface side of a wall The reinforcing structure 2 for the wall 10 will be described.

  Since the configuration of the existing reinforced concrete wall 10 (hereinafter referred to as “RC wall 10”) is the same as the contents shown in the first embodiment, detailed description thereof is omitted.

  The reinforcement structure 2 includes a first reinforcement member insertion hole 20, a first reinforcement member 30, a second reinforcement member insertion hole 40, a second reinforcement member 50, a filler 60, and a cross-sectional repair material 70. Yes.

  The first reinforcing member 30 is inserted into the first reinforcing member insertion hole 20, and the filler 60 is filled in the gap between the inner wall surface of the first reinforcing member insertion hole 20 and the first reinforcing member 30. .

In the present embodiment, a plurality of first reinforcing member insertion holes 20 are formed alternately for a plurality of grids formed by combining the main reinforcing bars 11 and the distribution reinforcing bars 12 in a lattice pattern. (See (b) of FIG. 5).
That is, the two first reinforcing member insertion holes 20, 20 formed corresponding to one first reinforcing member 30 are formed with the two main reinforcing bars 11, 11 being sandwiched therebetween. Each first reinforcing member insertion hole 20 is formed close to the main reinforcing bar 11. In the present embodiment, the first reinforcing member insertion holes 20 and 20 corresponding to one first reinforcing member 30 are formed in a state where the two main reinforcing bars 11 and 11 adjacent to the left and right are sandwiched. You may form the 1st reinforcement member insertion holes 20 and 20 in the state which pinched | interposed the 3 or more main reinforcing bars 11. FIG.

  Since the details of the other first reinforcing member insertion holes 20 are the same as the contents shown in the first embodiment, detailed description thereof is omitted.

  As shown in FIG. 5A, the first reinforcing member 30 is disposed on the RC wall 10 in a state where a part thereof is inserted into the first reinforcing member insertion holes 20, 20 adjacent to the left and right. . That is, a plurality of (two in this embodiment) main reinforcing bars 11 are restrained by one first reinforcing member 30.

  As shown in FIG. 6A, the first reinforcing member 30 includes two first wire members 31, 31, a first locking portion 32 formed at one end of the first wire member 31, The first wire rod 31 includes tip fixing portions 33 and 33 formed on the other end (opposite side of the first locking portion 32) of the first wire rod 31.

The two first wire rods 31, 31 are inserted into different first reinforcing member insertion holes 20, 20, respectively. Further, the two first wire rods 31 are connected by a first locking portion 32.
In addition, the number of the 1st wire 31 is not limited.

Since the details of the other first wire rod 31 are the same as those of the first embodiment, detailed description thereof is omitted.
Further, the details of the leading end fixing unit 33 are the same as those in the first embodiment, and thus detailed description thereof is omitted.

  As shown to (a) of FIG. 6, the 1st latching | locking part 32 is made from the steel plate materials 32a and 32a fixed to the base end of each 1st wire 31, and the connection material which connects plate material 32a mutually. 32b, 32b.

  The plate material 32 a is a rectangular steel plate and has a width that is greater than the outer diameter of the first wire 31. In the present embodiment, the plate material 32a is fixed to the first wire 31 by friction welding, but the fixing method of the plate material 32a is not limited. For example, it is only necessary that integration such as gas pressure welding or arc welding is possible.

  In this embodiment, the 1st wire 31 is being fixed to one short side rather than the center part of the rectangular-shaped plate material 32a. The plate member 32a may have a claw portion formed on the other short side.

  The plate members 32a are connected to each other via connecting members 32b and 32b with a gap therebetween. The plate material 32a is connected in a state where the short sides on the side where the first wire 31 is not fixed face each other.

The connecting member 32b is made of round steel, and is welded to the side end surfaces (side surfaces on the long side) of the plate members 32a and 32a. In addition, the material which comprises the connection material 32b is not limited, For example, a square steel material and a reinforcing bar may be sufficient.
The connecting member 32b of the present embodiment is longer than the interval between the first wire members 31 and is fixed to the plate members 32a and 32a, and the tip is located outside the first wire member 31. By doing in this way, the transmission performance of the stress of the 1st wire rods 31 and 31 and the 1st locking part 32 improves.

  In addition, the structure of the 1st reinforcement member 30 is not limited to the said structure, What is necessary is just to form suitably. For example, as shown in FIG. 6B, the first locking portion 32 may be constituted by a single plate material.

  As shown in FIG. 5A, the second reinforcing member insertion hole 40 is one surface side (right side in FIG. 5A) from the other surface side of RC wall 10 (left side in FIG. 5A). It is formed by drilling toward the surface.

  A second reinforcing member 50 is inserted into the second reinforcing member insertion hole 40, and a filler 60 is filled in a gap between the inner wall surface of the second reinforcing member insertion hole 40 and the second reinforcing member 50. .

In the present embodiment, a plurality of second reinforcing member insertion holes 40, 40,... Are formed by combining the main reinforcing bar 11 and the distribution reinforcing bar 12 in a lattice shape as shown in FIG. Every other grid is formed.
That is, the two second reinforcing member insertion holes 40, 40 formed corresponding to one second reinforcing member 50 are formed with the two main reinforcing bars 11, 11 sandwiched therebetween. Each second reinforcing member insertion hole 40 is formed in the vicinity of the main reinforcing bar 11 and is formed at a position not in contact with the first reinforcing member insertion hole 20.

  The details of the other second reinforcing member insertion holes 40 are the same as the contents shown in the first embodiment, and thus detailed description thereof is omitted.

  As shown in FIG. 5A, the second reinforcing member 50 is disposed on the RC wall 10 in a state where a part thereof is inserted into the second reinforcing member insertion holes 40, 40 adjacent to the left and right. Yes. That is, a plurality of (two in this embodiment) main reinforcing bars 11 are restrained by one second reinforcing member 50.

As shown in FIG. 6A, the second reinforcing member 50 includes two second wire members 51, 51, a second locking portion 52 formed at one end of the second wire member 51, It includes tip fixing portions 53 and 53 formed at the other end of each second wire 51 (on the opposite side to the second locking portion 52).
The details of the second reinforcing member 50 are the same as those of the first reinforcing member 30, and thus detailed description thereof is omitted.

The details of the filler 60 and the cross-sectional repair material 70 are the same as the contents shown in the first embodiment, and thus detailed description thereof is omitted.
Moreover, since each procedure (reinforcing method of RC wall 10) for constructing the reinforcing structure 2 according to the second embodiment is the same as the reinforcing method of the RC wall 10 shown in the first embodiment, Detailed description is omitted.

As mentioned above, according to the reinforcement structure 2 of the RC wall 10 which concerns on 2nd embodiment, the effect similar to the reinforcement structure 1 of 1st embodiment can be obtained.
Moreover, since several shear reinforcement bars (wires 31 and 51) can be arrange | positioned simultaneously, it is excellent in workability.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and the above-described constituent elements can be appropriately changed without departing from the spirit of the present invention.

1, 2 Reinforcement structure 10 RC wall (existing reinforced concrete wall)
DESCRIPTION OF SYMBOLS 11 Main reinforcement 12 Power distribution reinforcement 13 Covered concrete 20 1st reinforcement member insertion hole 30 1st reinforcement member 31 1st wire 32 First locking part 34 Claw part 40 2nd reinforcement member insertion hole 50 2nd reinforcement member 51 2nd Wire material 52 Second locking portion 54 Claw portion 60 Filler

Claims (6)

A reinforcing structure of an existing reinforced concrete wall in which main reinforcing bars and distribution reinforcing bars are arranged on one side and the other side of the wall,
A bottomed first reinforcing member insertion hole drilled from one side toward the other side;
A first reinforcing member inserted into the first reinforcing member insertion hole;
A filler filled in a gap between the inner wall surface of the first reinforcing member insertion hole and the first reinforcing member;
A bottomed second reinforcing member insertion hole drilled from the other side toward the one side,
A second reinforcing member inserted into the second reinforcing member insertion hole;
A filler filled in the gap between the inner wall surface of the second reinforcing member insertion hole and the second reinforcing member,
The bottom surface of the first reinforcing member insertion hole is located on one side of the main reinforcing bar and the distribution reinforcing bar on the other side,
The first reinforcing member includes a first wire, and a first locking portion that is formed at an end portion on one surface side of the first wire material and is locked to the main reinforcing bar on the one surface side,
The bottom surface of the second reinforcing member insertion hole is located on the other side of the main reinforcing bar and the distribution reinforcing bar on the one surface side,
The second reinforcing member includes a second wire and a second locking portion that is formed at an end portion on the other surface side of the second wire and is locked to the main reinforcing bar on the other surface side. A reinforcing structure for existing reinforced concrete walls.   The reinforcing structure for an existing reinforced concrete wall according to claim 1, wherein the second reinforcing member is disposed between the first reinforcing members that are vertically adjacent to each other. The first reinforcing member includes a plurality of the first wire rods,
The plurality of first wire rods are inserted into the different first reinforcing member insertion holes and are connected via the first locking portions,
The second reinforcing member includes a plurality of the second wire rods,
The plurality of second wire rods are inserted into the different second reinforcing member insertion holes and are connected via the second locking portions, respectively. Reinforced structure of existing reinforced concrete walls. The first locking portion is a plate material fixed to the base end of the first wire,
The reinforcing structure for an existing reinforced concrete wall according to any one of claims 1 to 3, wherein the second locking portion is a plate material fixed to a base end of the second wire rod. .   The reinforcing structure for an existing reinforced concrete wall according to claim 4, wherein a claw portion is formed at an end portion of the plate material. A reinforcing method of an existing reinforced concrete wall in which main reinforcing bars and distribution reinforcing bars are arranged on each of one side and the other side of a wall,
The first step of hanging the covered concrete on one side of the existing reinforced concrete wall until the main reinforcing bar on the one side is exposed, and
A first drilling step of drilling the existing reinforced concrete wall from one side to the other side to form a bottomed first reinforcing member insertion hole;
A first reinforcing member arrangement step of inserting the first reinforcing member into the first reinforcing member insertion hole and filling the filler;
A first restoration step of installing a first cross-section restoration material on one side of the existing reinforced concrete wall;
After curing of the first cross-section repair material, the second suspending step is performed until the main reinforcing bar on the other surface side is exposed to the covered concrete on the other surface side of the existing reinforced concrete wall;
A second drilling step of drilling the existing reinforced concrete wall from the other side toward the one side to form a bottomed second reinforcing member insertion hole;
A second reinforcing member placement step of inserting the second reinforcing member into the second reinforcing member insertion hole and filling the filler;
A second repair step of installing a second cross-section repair material on the other surface side of the existing reinforced concrete wall, and
In the first drilling step, the first reinforcing member insertion hole is formed so that the bottom surface of the first reinforcing member insertion hole is located on one side of the main reinforcing bar and the distribution reinforcing bar on the other surface side,
In the second drilling step, the second reinforcing member insertion hole is formed so that the bottom surface of the second reinforcing member insertion hole is located on the other side of the main reinforcing bar and the distribution reinforcing bar on the one surface side,
In the first reinforcing member arranging step, the first reinforcing member is arranged so that the first engaging portion provided at the end portion on the one surface side of the first reinforcing member is engaged with the main reinforcing bar on the one surface side,
In the second reinforcing member arranging step, the second reinforcing member is arranged so that the second engaging portion provided at the end portion on the other surface side of the second reinforcing member is engaged with the main reinforcing bar on the other surface side. A method for reinforcing an existing reinforced concrete wall.

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