JP2021025245A - Primary reinforcement member for reinforcement cage and hoop and reinforcement cage comprising these and assembly method of reinforcement cage - Google Patents

Abstract

To provide a primary reinforcement member that enables easy positioning of each main reinforcing bar against a reinforcing frame when fixing the reinforcing frame and each main reinforcing bar to each other.SOLUTION: A primary reinforcement member 10 for a reinforcement cage is composed of a plurality of main reinforcing bars 110 pulled in the same direction with each other, and a plurality of erection members 112 erected between the main reinforcing bars 110 adjacent to each other. At both ends of the reinforcement members 112, hooks where the main reinforcing bars 110 are hung or insertion holes where the main reinforcing bars 110 are inserted are respectively formed.SELECTED DRAWING: Figure 3

Description

In the present invention, for example, when assembling a reinforcing bar cage used for a concrete pile, a main bar member to be combined at a predetermined position with respect to a reinforcing frame, a hoop bar to be further combined with the main bar member after being combined with a reinforcing frame, and a reinforcing bar provided with these. The present invention relates to a cage and a method of assembling a reinforcing bar cage using such a main bar member and a hoop bar.

The reinforcing bar cage is formed by arranging a plurality of main bars in a direction orthogonal to the reinforcing frame formed in a ring shape, and then fixing the reinforcing frame and each main bar to each other. It was necessary to hold each main bar in a predetermined position with a member or the like other than the reinforcing frame until the fixing was established and the reinforcing bar became independent.

For example, in Patent Document 1, a pair of main bar holding portions formed in a ring shape are arranged to face each other, and each main bar is arranged between the pair of main bar holding portions to hold each main bar at a predetermined position. The technology to be kept is disclosed.

Japanese Unexamined Patent Publication No. 5-192731

However, the reinforcing bar cage is generally assembled at the site where a concrete pile or the like using the reinforcing bar cage is installed, and each main reinforcing bar is held by using the device or the like disclosed in Patent Document 1 described above. Since the on-site work is large, there are problems in securing the space required for assembling the reinforcing bar cage and the cost required for assembling the reinforcing bar cage.

The present invention has been made to solve such a problem, and an object of the present invention is that when the reinforcing frame and each main reinforcing bar are fixed to each other, each main reinforcing bar can be easily positioned with respect to the reinforcing frame. Main reinforcing bar members, hoop bars that can be easily combined with the main reinforcing bar members after being combined with the reinforcing frame, reinforcing bar cages equipped with these, and reinforcing bar cages using such main reinforcing bar members and hoop bars. To provide an assembly method.

According to some aspect of this invention,
With multiple main rebars aligned in the same direction,
Provided is a main reinforcing bar member for a reinforcing bar cage, which includes a plurality of erection members erected between the main reinforcing bars adjacent to each other.

Preferably
The erection member has hook portions at both ends on which the main reinforcing bar is hung.

Preferably
Insertion holes through which the main reinforcing bar is inserted are formed at both ends of the erection member.

According to other aspects of the invention,
A hoop muscle having a ring-shaped main body member in which at least one cut is formed.
Fixing plate members extending in a direction orthogonal to the radial direction of the main body member are attached to both ends of the main body member at the cut.
Each of the fixing plate members is provided with a hoop streak in which notch grooves into which the end portions of the main body members facing each other are fitted are formed.

According to yet another aspect of the invention,
A reinforcing bar cage including the above-mentioned main reinforcing bar member and the above-mentioned hoop bar is provided.

According to yet another aspect of the invention,
Both ends of a main reinforcing bar member including a plurality of main reinforcing bars aligned in the same direction and a plurality of erection members erected between the main reinforcing bars adjacent to each other in a direction orthogonal to the direction in which the main reinforcing bars extend. Winding from to the center,
The wound main reinforcing bar member is placed on the top of the reinforcing frame that stands in the vertical direction.
The main reinforcing bar in contact with the reinforcing frame is fixed to the reinforcing frame, and the reinforcing bar is fixed to the reinforcing frame.
After that, the remaining main reinforcing bars that had been wound are returned along the reinforcing frame.
Provided is a method for assembling a reinforcing bar cage in which the main reinforcing bars close to the main reinforcing bars fixed to the top of the reinforcing frame are fixed to the reinforcing frame in order.

According to yet another aspect of the invention,
After placing the main reinforcing bar on the top of the reinforcing frame standing in the vertical direction, the main reinforcing bar is fixed to the reinforcing frame.
After hanging one end of the erection member on the main reinforcing bar, another main reinforcing bar is hung on the other end of the erection member.
After that, by repeating fixing the other main reinforcing bar to the reinforcing frame at a position adjacent to the previously fixed main reinforcing bar, the main reinforcing bar close to the main reinforcing bar fixed to the top of the reinforcing frame is repeated. Provided is a method of assembling a reinforcing bar cage in which the reinforcing bars are fixed to the reinforcing frame in order from the reinforcing bar.

According to the present invention, when the reinforcing frame and each main reinforcing bar are fixed to each other, the wound main reinforcing bar member is placed on the top of the reinforcing frame standing in the vertical direction, and the main reinforcing bar is in contact with the reinforcing frame. Is fixed to the reinforcing frame, and then the remaining main reinforcing bars that have been wound are returned along the reinforcing frame, so that it is not necessary to hold a plurality of main reinforcing bars by using another device. , Main reinforcing bar member that can easily position each main reinforcing bar with respect to the reinforcing frame, hoop reinforcing bar that can be easily combined with the main reinforcing bar member after being combined with respect to the reinforcing frame, and a reinforcing bar basket provided with these. , And, it was possible to provide a method for assembling a reinforcing bar cage using such a main bar member and a hoop bar.

It is a figure which shows the whole of the reinforcing bar cage 100. FIG. 5 is a cross-sectional view taken along the line AA in FIG. It is a perspective view which shows the main reinforcing bar member 10 which concerns on this embodiment. It is a front view which shows the erection member 112 which concerns on this embodiment. It is a front view which shows the hoop muscle 130 which concerns on this embodiment. It is an enlarged plan view of the B part in FIG. It is a side view which shows the fixing plate material 136 which concerns on this embodiment. It is a front schematic diagram which shows the state in which the main reinforcing bar member 10 is wound toward the center from both ends in the direction orthogonal to the direction in which the main reinforcing bar 110 extends. It is a front schematic diagram which shows the state which the wound main reinforcing bar member 10 is placed on the top of the reinforcing frame 120. It is a front schematic diagram which shows the state which both ends of the main reinforcing bar member 10 which had been wound are returned along the reinforcing frame 120. It is a front schematic diagram which shows the state which attached the hoop muscle 130. It is a front view which shows the erection member 112 which concerns on modification 1. It is a front view which shows the erection member 112 which concerns on modification 2.

<Structure of Rebar Basket 100>
With reference to FIGS. 1 and 2, the overall configuration of the reinforcing bar cage 100 assembled by using the main reinforcing bar member 10 according to the present embodiment will be briefly described.

The reinforcing bar cage 100 is a structure used for shear reinforcement of concrete piles that support high-rise buildings and bridges. After installing the reinforcing bar cage 100 in a hole drilled in the ground, a formwork or the like is assembled around the reinforcing bar cage 100, and concrete is cast in the formwork to complete a concrete pile. Generally, the reinforcing bar cage 100 is roughly composed of a main reinforcing bar member 10, a reinforcing frame 120, a hoop bar 130, and a fixing metal fitting 140 (see FIG. 2).

As shown in FIG. 3, the main reinforcing bar member 10 is composed of a plurality of main reinforcing bars 110 and a plurality of erection members 112.

The main reinforcing bar 110 is a reinforcing bar that mainly bears the tensile force applied to the concrete pile. In the present embodiment, a long reinforcing bar having a round cross section is used as the main reinforcing bar 110 (of course, the shape of the main reinforcing bar 110 is not limited to this). The main reinforcing bars 110 are aligned in the same direction and arranged substantially parallel to each other.

In the state where the reinforcing bar cage 100 is assembled, the main reinforcing bar 110 is arranged on the virtual circle VC1 centered on a certain point C in the cross section orthogonal to the longitudinal direction of the reinforcing bar cage 100 (see FIG. 2). .. More specifically, each main reinforcing bar 110 is arranged in contact with the outer periphery of the reinforcing frame 120 formed in a ring shape. That is, the diameter dimension of the reinforcing frame 120 plus the diameter dimension of one main reinforcing bar 110 corresponds to the diameter dimension of the virtual circle VC1.

The erection member 112 is a member erected between the main reinforcing bars 110 adjacent to each other, and in the present embodiment, three erection members 112 are arranged between the pair of main reinforcing bars 110. Further, by disposing a plurality of the same erection members 112 between the pair of main reinforcing bars 110, the pair of main reinforcing bars 110 can be maintained in a state of being parallel to each other.

As shown in FIG. 4, each of the erection members 112 in the present embodiment has hook portions 114 formed at both ends thereof. The inner diameter of the hook portion 114 is set to be substantially the same as or slightly larger than the outer diameter of the main reinforcing bar 110 so that it can be hung on the main reinforcing bar 110.

By erection of such an erection member 112 between the main reinforcing bars 110 adjacent to each other, the "sudare" -shaped main reinforcing bar member 10 as shown in FIG. 3 is configured.

Returning to FIG. 2, the reinforcing frame 120 is a strip-shaped member adjacent to the inner circumference of a substantially columnar structure composed of a large number of main reinforcing bars 110, and is formed into a substantially circular shape by being bent with a predetermined curvature. Has been done. Similar to the arrangement of the main reinforcing bars 110, the external shape of the reinforcing frame 120 is not limited to a substantially circular shape, and may be a substantially angular shape or other shape according to the arrangement of the main reinforcing bars 110. ". That is, in the present specification, "annular" is a concept that includes not only a substantially circular shape but also a substantially angular shape and the like. The number of reinforcing frames 120 is determined according to the length of the main reinforcing bars 110 used (three reinforcing frames 120 are used in the example of FIG. 1). Further, from the viewpoint of the strength of the reinforcing bar cage 100, it is preferable that the distance between the reinforcing frames 120 adjacent to each other is within 3 m.

As shown in FIGS. 5 and 6, the hoop muscle 130 according to the present embodiment includes a ring-shaped main body member 134 in which one cut 132 is formed, and a pair of hoop muscles 130 attached to both ends of the main body member 134 in the cut 132. It includes a fixed plate material 136.

The main body member 134 is a round bar-shaped member that surrounds a substantially cylindrical structure composed of a large number of main reinforcing bars 110 adjacent to the outer periphery thereof, and is bent with a predetermined curvature like the reinforcing frame 120. It is formed in a substantially circular shape. Further, similarly to the arrangement of the main reinforcing bars 110, the external shape of the hoop reinforcing bars 130 is not limited to a substantially circular shape, and may be a substantially angular shape or other shape according to the arrangement of the main reinforcing bars 110. It may be "ring". The distance between the hoop muscles 130 adjacent to each other is shorter than the distance between the reinforcing frames 120, for example, about 200 mm.

As described above, the pair of fixing plate members 136 are plate members attached to both ends of the main body member 134 at the cut 132, and each fixing plate member 136 is oriented in a direction orthogonal to the radial direction of the main body member 134 formed in a ring shape. It is attached to the end of the main body member 134 so as to extend.

Further, as shown in FIG. 7, each fixing plate member 136 is formed with a notch groove 138 into which the end portion of the main body member 134 (separate from the end portion of the main body member 134 to which the main body member 134 is attached) is fitted. ing.

As a result, the other end of the main body member 134 is fitted into the notch groove 138 of the fixing plate member 136 attached to one end of the main body member 134 in the cut 132, and at the same time, it is attached to the other end of the main body member 134. By fitting one end of the main body member 134 into the notch groove 138 of the fixed plate member 136, a ring-shaped hoop muscle 130 in which the cut 132 is closed can be formed.

Returning to FIG. 2, the fixing bracket 140 is a tool for fixing the main reinforcing bar 110 to the reinforcing frame 120 and fixing the hoop reinforcing bar 130 to the main reinforcing bar 110. As the fixing metal fitting 140, a known one can be used. Further, the fixing metal fitting 140 used when fixing the main reinforcing bar 110 to the reinforcing frame 120 and the fixing metal fitting 140 used when fixing the hoop reinforcing bar 130 to the main reinforcing bar 110 use different metal fittings. You may. Further, the main reinforcing bar 110 may be adhered to the reinforcing frame 120 by welding or the like, and the hoop reinforcing bar 130 may be adhered to the main reinforcing bar 110 by welding or the like without using the fixing metal fitting 140. However, as described above, it is preferable to use a non-welding method using only the fixing bracket 140, which is excellent in terms of workability when assembling the reinforcing bar cage 100 at the site, strength after construction, and the like.

<Assembly method of rebar basket 100>
Next, a method of assembling the reinforcing bar cage 100 according to the present embodiment will be described. In FIGS. 8 to 11 used for explaining the assembly method, the hook portion 114 of the erection member 112 constituting the main reinforcing bar member 10 is omitted.

First, the above-mentioned "sudare" -shaped main reinforcing bar member 10 is wound toward the center from both ends in a direction orthogonal to the direction in which the main reinforcing bar 110 extends (see FIG. 8).

After that, at the construction site, as shown in FIG. 9, the reinforcing frame 120 formed in a ring shape is erected in the substantially vertical direction, and the wound main reinforcing bar member 10 is placed on the tops thereof. The main reinforcing bar 110 (main reinforcing bar 110 arranged at the substantially central portion of the main reinforcing bar member 10) that is in contact with the reinforcing frame 120 when placed is fixed to the reinforcing frame 120 with the fixing bracket 140.

After that, as shown in FIG. 10, both ends of the wound main reinforcing bar member 10 are returned along the reinforcing frame 120, and the main reinforcing bar 110 closest to the first fixed main reinforcing bar 110 is returned to the reinforcing frame 120 in order. On the other hand, it is fixed with the fixing bracket 140.

Regarding the main reinforcing bar 110 to be fixed at the position of the lower half of the reinforcing frame 120, for example, the main reinforcing bar 110 may be temporarily fixed with a wire (thin wire) or the like, and then fixed with the fixing metal fitting 140. Then, while one worker presses the main reinforcing bar 110 hanging from the erection member 112 toward the reinforcing frame 120, another worker may fix the main reinforcing bar 110 with the fixing bracket 140.

Further, it is necessary to attach several main reinforcing bars 110 between the pair of pedestals K on which the reinforcing frame 120 is mounted from the beginning of the process, but the main reinforcing bars 110 to be attached at this position are the main reinforcing bar members 10. May be attached to the reinforcing frame 120 in advance before attaching the main reinforcing bar member 10, or may be attached to the reinforcing frame 120 after the attachment of the main reinforcing bar member 10 is completed.

Further, when returning both ends of the wound main reinforcing bar member 10 along the reinforcing frame 120, if the main reinforcing bar 110 falls while vigorously returning and is dangerous, for example, a rope-shaped one is used. It is preferable to wind the main reinforcing bar members 10 together, and when returning both ends of the main reinforcing bar member 10 along the reinforcing frame 120, loosen the rope-shaped member little by little.

After attaching all the main reinforcing bars 110 to the reinforcing frame 120, the process proceeds to the step of attaching the hoop reinforcing bars 130 to the main reinforcing bars 110.

The main reinforcing bars 110 are sequentially inserted from the cut 132 in the hoop reinforcing bars 130 to the inside of the hoop reinforcing bars 130 so as to be in contact with the outer periphery of the plurality of main reinforcing bars 110 fixed to the reinforcing frame 120 as shown in FIG. The hoop muscle 130 is arranged in.

After that, the other end of the main body member 134 is fitted into the notch groove 138 of the fixing plate material 136 attached to one end of the main body member 134, and at the same time, the fixing plate material 136 attached to the other end of the main body member 134. By fitting one end of the main body member 134 into the notch groove 138, the cut 132 is closed to form a ring-shaped hoop muscle 130. Finally, the reinforcing bar cage 100 is completed by fixing the hoop bar 130 to the main reinforcing bar 110 using the fixing metal fitting 140.

<Characteristics of main reinforcing bar member 10>
According to the main reinforcing bar member 10 according to the present embodiment, as described above, when the reinforcing frame and each main reinforcing bar are fixed to each other, the wound main reinforcing bar member is placed on the top of the reinforcing frame standing in the vertical direction. Then, the main reinforcing bar in contact with the reinforcing frame is fixed to the reinforcing frame, and then the remaining main reinforcing bar that has been wound is returned along the reinforcing frame to provide another device. It is not necessary to use and hold a plurality of main reinforcing bars, and each main reinforcing bar can be easily positioned with respect to the reinforcing frame.

Further, by making the erection member 112 constituting the main reinforcing bar member 10 having hook portions 114 formed at both ends thereof, the number of main reinforcing bars 110 constituting the main reinforcing bar member 10 can be easily increased or decreased. There is an advantage.

<Characteristics of hoop muscle 130>
According to the hoop reinforcement 130 according to the present embodiment, since it can be easily arranged on the outer periphery of the plurality of main reinforcing bars 110 fixed to the reinforcing frame 120, the man-hours required for fixing the hoop reinforcement 130 can be reduced. it can.

<Modification example 1>
In the above-described embodiment, as the erection member 112 constituting the main reinforcing bar member 10, one having hook portions 114 formed at both ends is used, but the hook portion 114 is the erection member 112 as described above. The ends may be curved in the same direction with respect to the longitudinal direction, or as shown in FIG. 12, the ends may be curved in directions opposite to each other with respect to the longitudinal direction of the erection member 112. It may be in the shape of a character.

Further, instead of the hook portion 114, as shown in FIG. 13, a plate-shaped member having insertion holes 116 through which the main reinforcing bar 110 is inserted may be formed at both ends thereof as the erection member 112. If such an insertion hole 116 is used instead of the hook portion 114, it becomes difficult to attach the main reinforcing bar 110 to the erection member 112, but on the other hand, the main reinforcing bar 110 does not easily come off from the erection member 112. There is also.

Further, for example, a thin wire such as a wire may be used as the erection member 112. In this case, the twisted wires are erected between the main reinforcing bars 110 adjacent to each other.

<Modification 2>
Further, in the above-described embodiment, when the main reinforcing bar member 10 is attached to the reinforcing frame 120, the main reinforcing bar member 10 is wound from both ends in the direction orthogonal to the extending direction of the main reinforcing bar 110 toward the center. The member 10 may be wound around the columnar core material in advance. In this case, the wound main reinforcing bar 110 on the terminal side is first fixed to the reinforcing frame 120, and then the wound main reinforcing bar 110 is returned and fixed to the reinforcing frame 120 in order.

<Modification example 3>
Further, in the above-described embodiment, one cut 132 is provided in the main body member 134 constituting the hoop muscle 130, but the main body is divided into two (that is, the main body member 134 is divided in half). The fixing plate member 136 may be attached to each of the four ends of the member 134.

<Modification example 4>
Further, in the above-described embodiment, the "sudare" -shaped main reinforcing bar member 10 in which each erection member 112 on which the hook portion 114 is formed is erected in advance between the adjacent main reinforcing bars 110 is used. Instead of this, the erection member 112 and the main reinforcing bar 110 may be alternately attached around the reinforcing frame 120 in order.

Specifically, after first fixing one main reinforcing bar 110 to the top of the reinforcing frame 120 with the fixing metal fitting 140, one end of the erection member 112 is hung on the fixed main reinforcing bar 110. After that, another main reinforcing bar 110 is hung on the other end of the erection member 112, and the other main reinforcing bar 110 is fixed to the reinforcing frame 120 at a position adjacent to the previously fixed main reinforcing bar 110. In this way, the reinforcing bar cage 100 can be completed by fixing the plurality of main reinforcing bars 110 to the reinforcing frame 120 in order.

<Modification 5>
Further, in the above-described embodiment, the pair of fixing plate members 136 on which the cuts 132 are formed are applied to the ring-shaped hoop bars 130, but the fixing method using the pair of fixing plate members 136 is limited to the ring-shaped hoop bars 130 and the like. However, it can also be used as a connection method for a straight main reinforcing bar 110 or the like. When the pair of fixed plate members 136 are used as a method of connecting the linear (straight) members, it is necessary that a pulling force is applied to the pair of linear members connected by the fixed plate members 136 in a direction away from each other. Suitable.

It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is shown by the scope of claims, not the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

10 ... Main reinforcing bar member 100 ... Reinforcing bar cage 110 ... Main reinforcing bar, 112 ... Erecting member, 114 ... Hook part, 116 ... Insertion hole, 120 ... Reinforcing frame, 130 ... Hoop bar, 132 ... Cut, 134 ... Main body member, 136 ... Fixing plate material, 138 ... Notch groove, 140 ... Fixing bracket K ... Stand

Claims (7)

With multiple main rebars aligned in the same direction,
A main reinforcing bar member for a reinforcing bar cage, comprising a plurality of erection members erected between the main reinforcing bars adjacent to each other. The main reinforcing bar member according to claim 1, wherein the erection member has hook portions on both ends on which the main reinforcing bar is hung. The main reinforcing bar member according to claim 1, wherein insertion holes through which the main reinforcing bar is inserted are formed at both ends of the erection member. A hoop muscle having a ring-shaped main body member in which at least one cut is formed.
Fixing plate members extending in a direction orthogonal to the radial direction of the main body member are attached to both ends of the main body member at the cut.
A hoop streak in which notch grooves into which the ends of the main body members facing each other are fitted are formed in each of the fixing plate materials. The main reinforcing bar member according to any one of claims 1 to 3 and
A hoop muscle having a ring-shaped main body member in which at least one cut is formed.
Fixing plate members extending in a direction orthogonal to the radial direction of the main body member are attached to both ends of the main body member at the cut.
Each of the fixing plate members is provided with a hoop bar in which notch grooves into which the end portions of the main body members facing each other are fitted are formed. Both ends of a main reinforcing bar member including a plurality of main reinforcing bars aligned in the same direction and a plurality of erection members erected between the main reinforcing bars adjacent to each other in a direction orthogonal to the direction in which the main reinforcing bars extend. Winding from to the center,
The wound main reinforcing bar member is placed on the top of the reinforcing frame that stands in the vertical direction.
The main reinforcing bar in contact with the reinforcing frame is fixed to the reinforcing frame, and the reinforcing bar is fixed to the reinforcing frame.
After that, the remaining main reinforcing bars that had been wound are returned along the reinforcing frame.
A method of assembling a reinforcing bar cage in which the main reinforcing bars close to the main reinforcing bars fixed to the top of the reinforcing frame are fixed to the reinforcing frame in order. After placing the main reinforcing bar on the top of the reinforcing frame standing in the vertical direction, the main reinforcing bar is fixed to the reinforcing frame.
After hanging one end of the erection member on the main reinforcing bar, another main reinforcing bar is hung on the other end of the erection member.
After that, by repeating fixing the other main reinforcing bar to the reinforcing frame at a position adjacent to the previously fixed main reinforcing bar, the main reinforcing bar close to the main reinforcing bar fixed to the top of the reinforcing frame is repeated. A method of assembling a reinforcing bar cage in which the reinforcing bars are fixed to the reinforcing frame in order.

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