Reinforced Concrete Frame and Wall Construction Methods

Abstract

To provide a reinforcement bar mount that facilitates easy placement of transverse reinforcement bars in a wall.SOLUTION: A reinforcement bar mount 10 is used for arranging transverse reinforcement bars 4 to be embedded in a reinforced concrete wall 1. The reinforcing bar mount 10 comprises: at least a pair of pillars 20 which are arranged separately at a predetermined distance on a floor surface 2; a horizontal connecting member 21 which connects the pillars 20 to each other, and diagonal braces 12. Each of the pillars 20 comprises: a channel steel 23 which extends upward from the floor surface 2; and a plurality of reinforcement bar supports 24 which are provided alongside the channel steel 23 in a vertical direction and to which transverse reinforcement bars 4 are locked. The reinforcement bar supports 24 are hook-shaped to prevent the transverse reinforcement bars 4 from falling off.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a reinforcing bar frame for arranging horizontal reinforcement in a reinforced concrete wall, and a method for constructing a wall using this reinforcing bar frame. [Background technology]

[0002] BACKGROUND ART Reinforcing bar frames for arranging reinforcing bars have been proposed in the past (see Patent Documents 1 to 3). Patent document 1 shows a three-dimensional unit reinforcing bar comprising a scaffold for assembling reinforcing bars, a pair of mesh reinforcing bars set into the sliding ruler of the scaffold for assembling reinforcing bars, splices and horizontal and vertical bracing bars attached between the mesh reinforcing bars, and a width-adjusting and hanging jig fixed to the lower end of the scaffold for assembling reinforcing bars.

[0003] Patent Document 2 shows a mesh panel that includes a frame material and reinforcing bars that are arranged vertically and horizontally on the support material of the frame material and tied together with wire. These mesh panels are lined up on site, and the ends of the reinforcing bars that butt together are tied together with wire to arrange the reinforcing bars in the wall. Patent Document 3 shows a reinforcing bar stand that includes a support pillar that is an angle material, short reinforcing bars welded perpendicular to the bottom of the support pillar, and short reinforcing bars combined in a V shape and welded to the top of the support pillar in an angular shape. The short reinforcing bars at the bottom of this reinforcing bar stand are tied together along the main reinforcing bars and distribution bars of the lower reinforcing bars, and the short reinforcing bars at the top support the upper reinforcing bars. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 5-321467 [Patent Document 2] Japanese Patent Application Publication No. 6-81473 [Patent Document 3] Japanese Patent Application Laid-Open No. 2012-7330 Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a reinforcing bar frame that allows for easy placement of horizontal reinforcement in a wall, and a method for constructing a wall. [Means for solving the problem]

[0006] The inventors have arrived at the present invention by focusing on the fact that a reinforcing bar frame for arranging horizontal reinforcement in reinforced concrete walls comprises at least one pair of posts arranged a predetermined distance apart on the floor surface, horizontal connecting members and diagonal braces that connect these posts, and that by providing multiple reinforcing bar support members on the posts, the horizontal reinforcement can be engaged with the reinforcing bar support members, making it easy to arrange the reinforcement. The reinforcing bar stand (for example, the reinforcing bar stand 10 described later) of the first invention is a reinforcing bar stand for arranging horizontal reinforcement bars (for example, the horizontal reinforcement bars 4 described later) to be embedded in a reinforced concrete wall (for example, the wall 1 described later), and comprises at least a pair of pillars (for example, the pillars 20 described later) arranged a predetermined distance apart on a floor surface (for example, the floor surface 2 described later), horizontal connecting members (for example, the horizontal connecting members 21 described later) and diagonal braces (for example, the diagonal braces 12 described later) that connect the pillars to each other, and each of the pillars comprises a steel beam (for example, the channel steel 23 described later) extending upward from above the floor surface, and reinforcing bar supports (for example, the reinforcing bar supports 24 described later) that are arranged in a row in the vertical direction on the steel beam and to which the horizontal reinforcement bars are engaged, and the reinforcing bar supports are hook-shaped to prevent the horizontal reinforcement bars from falling off.

[0007] According to this invention, horizontal reinforcement bars are arranged at predetermined intervals in the vertical direction by engaging the horizontal reinforcement bars with the hook-shaped (L-shaped) reinforcing bar receiving material of the reinforcing bar frame, and then vertical reinforcement bars are arranged by placing them in contact with the horizontal reinforcement bars and temporarily fixing them with binding wires, etc. Therefore, even if the horizontal reinforcement bars in the wall have a large diameter, the horizontal reinforcement bars can be easily arranged. In addition, horizontal reinforcement can be placed at a predetermined height using multiple rebar supports arranged vertically on the steel beams that make up the support columns.The hook-shaped (L-shaped) rebar supports also prevent the horizontal reinforcement from falling off. The reinforced concrete frame is configured to include at least one pair of support columns, horizontal connecting members that connect the support columns, and diagonal braces. Therefore, the reinforced concrete frame has a simple configuration and can be easily manufactured at low cost.

[0008] The second invention of the reinforcing bar stand is characterized in that the reinforcing bar support material is formed from reinforcing bar material or structural steel, and comprises a horizontal portion (for example, horizontal portion 30 described below) whose base end is fixed to a support, and a vertical portion (for example, vertical portion 31 described below) extending upward from the tip of the horizontal portion.

[0009] Examples of the reinforcing bar support material include reinforcing bars bent into a hook (L) shape and angle iron. According to this invention, the reinforcing bar support member attached to the support includes a horizontal section whose base end is fixed to the support and a vertical section extending upward from the tip of the horizontal section. Therefore, by simply inserting the horizontal bars into the reinforcing bar support member from above and placing them on the horizontal section, the horizontal section supports the horizontal bars, and the vertical section easily prevents the horizontal bars from falling out.

[0010] The wall construction method of the second invention is a method for constructing a reinforced concrete wall using the above-mentioned reinforced concrete frame, and is characterized by comprising the steps of: installing the reinforced concrete frame at a position on the floor where the wall is to be constructed (for example, step S1 described below); engaging the horizontal reinforcement of the wall with the reinforcing bar receiving material of the reinforced concrete frame (for example, step S2 described below); arranging the vertical reinforcement of the wall so that it abuts the horizontal reinforcement and temporarily fixing the vertical reinforcement to the horizontal reinforcement (for example, step S3 described below); retaining or removing the reinforced concrete frame (for example, step S4 described below); and erecting a pair of wall formworks (for example, wall formwork 8 described below) between the horizontal reinforcement and the vertical reinforcement, and pouring concrete inside the pair of wall formworks (for example, step S4 described below).

[0011] According to this invention, horizontal reinforcement of the wall is arranged using a reinforcing bar frame, and then vertical reinforcement is arranged by abutting it against the horizontal reinforcement. Therefore, even if the horizontal reinforcement and vertical reinforcement have a large diameter, they can be easily arranged, and construction costs can be reduced. Furthermore, because a steel frame is installed at the location where the wall will be constructed, no space is required to unitize the horizontal reinforcement, and the horizontal reinforcement can be easily arranged even if the construction site is narrow. [Effects of the Invention]

[0012] According to the present invention, a reinforcing bar frame and a wall construction method that allow for easy arrangement of horizontal reinforcement in a wall can be provided. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a front view of a wall constructed using a reinforcing bar rack according to an embodiment of the present invention. [Figure 2] 2A and 2B are cross-sectional views of a wall according to an embodiment of the present invention taken along lines AA and BB, respectively. [Figure 3] FIG. 2 is a front view of the reinforcing bar stand according to the embodiment. [Figure 4] 1A and 1B are a front view and a CC cross-sectional view of a stand unit constituting the reinforced concrete stand according to the embodiment. [Figure 5] 1 is a flowchart of a procedure for constructing a wall using a reinforcing bar rack according to an embodiment. [Figure 6] FIG. 1 is an explanatory diagram of a construction procedure for a wall according to an embodiment (part 1, a state in which horizontal reinforcement bars are arranged on a reinforcing bar frame). [Figure 7] FIG. 10 is an explanatory diagram of the construction procedure for the wall according to the embodiment (part 2, state in which the vertical reinforcement is temporarily fixed to the vertical reinforcement lifting jig). [Figure 8] FIG. 10 is an explanatory diagram of the construction procedure for a wall according to the embodiment (part 3, the state in which vertical reinforcement is attached to horizontal reinforcement by the vertical reinforcement lifting jig). [Figure 9] FIG. 10 is an explanatory diagram of the construction procedure for the wall according to the embodiment (part 4, the state after the wall formwork has been erected and the concrete body has been constructed). DETAILED DESCRIPTION OF THE INVENTION

[0014] The present invention relates to a reinforcing bar frame for arranging horizontal reinforcement in a reinforced concrete wall, and a method for constructing a reinforced concrete wall using the reinforcing bar frame. Specifically, the reinforcing bar frame includes at least a pair of columns, horizontal connectors and diagonal braces that connect the columns together, and the columns are each composed of a steel beam that is installed on the floor and extends upward, and a plurality of steel reinforcing bar supports that are arranged vertically on the steel beam and to which the horizontal reinforcement is attached (Figs. 1 to 4). Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a front view of a wall 1 constructed using a reinforcing bar framing 10 according to one embodiment of the present invention. Fig. 2(a) is a cross-sectional view of the wall 1 taken along line AA. Fig. 2(b) is a view of the wall 1 taken along line BB. Fig. 3 is a front view of the reinforcing bar framing 10. Wall 1 is constructed on floor 2 and comprises a concrete body 3 and doubly reinforced horizontal and vertical reinforcements 4 and 5 embedded within this concrete body 3. The horizontal reinforcements 4 are large-diameter reinforcing bars (e.g., D25 or greater and D41 or less) and are arranged vertically at predetermined intervals p1. The vertical reinforcements 5 are arranged horizontally at predetermined intervals p2.

[0015] The reinforcing bar stand 10 is used to arrange the horizontal bars 4 of the wall 1 made of reinforced concrete. The reinforced concrete frame 10 comprises a plurality of frame units 11 arranged on the floor surface 2 at a predetermined distance L in the wall length direction, and diagonal braces 12 extending at an angle to the horizontal and connecting the frame units 11 together.

[0016] 4(a) is a front view of the gantry unit 11, and FIG. 4(b) is a view of the gantry unit 11 as seen from the arrow CC. The mount unit 11 includes a pair of support columns 20 that are spaced a predetermined distance D apart and extend upward, and a horizontal connecting member 21 that extends horizontally and connects the support columns 20 together. Each support pillar 20 comprises a pair of base plates 22 fixed onto the floor surface 2, a pair of channel steels 23 provided on these base plates 22, reinforcing bar supports 24 provided on each channel steel 23 at a predetermined interval p1 in the vertical direction and to which cross bars 4 are attached, and brace connecting pieces 25 provided on the channel steels 23.

[0017] The base plate 22 is formed with a through hole (not shown), and an anchor bolt 6 embedded in the floor surface 2 is inserted into this through hole and a nut 7 is tightened. A diagonal brace 12 is connected to the brace connecting piece 25. A turnbuckle 13 is provided on this diagonal brace 12, and by rotating this turnbuckle 13, the length of the diagonal brace 12 can be adjusted. The reinforcing bar support material 24 is formed by bending a reinforcing bar material into a hook (L) shape. The reinforcing bar support material 24 includes a horizontal portion 30 whose base end is welded to the channel steel 23, and a vertical portion 31 extending upward from the tip of the horizontal portion 30.

[0018] The procedure for constructing the reinforced concrete wall 1 using the above-described reinforcing bar frame 10 will be described with reference to the flowchart of FIG. In step S1, as shown in Fig. 6, a reinforcing steel frame 10 is installed at a position on the floor 2 where the wall 1 will be constructed. Specifically, anchor bolts 6 are embedded in advance at the position of the wall 1 on the floor 2, and frame units 11 are assembled. The frame units 11 are lifted up by a crane and lowered to the position of the wall 1 on the floor 2, and fixed to the anchor bolts 6. Next, the frame units 11 are connected to each other with diagonal braces 12. In step S2, as shown in Fig. 6, horizontal reinforcement bars 4 are arranged using a reinforcing bar stand 10. Specifically, the horizontal reinforcement bars 4 are inserted from above into the reinforcing bar support members 24 of the reinforcing bar stand 10 and locked in place. At this time, for sections of the wall 1 that are equal to or less than a predetermined height h from the ground surface, workers manually lift the horizontal reinforcement bars 4 and insert them into the reinforcing bar support members 24. On the other hand, for sections of the wall 1 that are higher than the predetermined height h, a high-altitude work vehicle, crane, or the like is used to lift the horizontal reinforcement bars 4 and insert them into the reinforcing bar support members 24.

[0019] In step S3, the vertical reinforcement 5 is arranged using a vertical reinforcement lifting jig 40. Specifically, as shown in FIG. 7, first, the vertical reinforcement lifting jig 40 is prepared. The vertical reinforcement lifting jig 40 has through holes 41 formed at predetermined intervals p2, through which the vertical reinforcement 5 (threaded reinforcing bars) are inserted. On the floor surface 2, the vertical reinforcement 5 is inserted into the through holes 41 of the vertical reinforcement lifting jig 40 and temporarily fixed with a reinforcing bar fastener (e.g., a plate nut manufactured by Tokyo Tekko Co., Ltd.). In this state, as shown in FIG. 8, the vertical reinforcement lifting jig 40 is lifted by a crane 42 and lowered so that the vertical reinforcement 5 temporarily fixed to the vertical reinforcement lifting jig 40 abuts against the inside of the horizontal reinforcement 4. In this way, the vertical reinforcement 5 of the wall 1 is arranged so that it abuts against the inside of the horizontal reinforcement 4. Next, the vertical reinforcement 5 is arranged by temporarily fixing the vertical reinforcement 5 to the horizontal reinforcement 4 with a binding wire or the like (not shown). Thereafter, the vertical reinforcement lifting jig 40 is removed from the vertical reinforcement 5 and removed. In step S4, as shown in FIG. 9, with the reinforcing bar frame 10 remaining in place, a pair of wall formworks 8 is erected with the horizontal reinforcement 4 and the vertical reinforcement 5 sandwiched therebetween, and concrete is poured inside the pair of wall formworks 8 to construct the concrete body 3.

[0020] According to this embodiment, the following effects are obtained. (1) By locking the horizontal reinforcement 4 to the reinforcing bar support material 24 of the reinforcing bar frame 10, the horizontal reinforcement 4 is arranged at a predetermined interval p1 in the vertical direction, and then the vertical reinforcement 5 is arranged by abutting the horizontal reinforcement 4 and temporarily fixing it with binding wires or the like. Therefore, the horizontal reinforcement 4 and the vertical reinforcement 5 can be arranged easily. Moreover, the reinforcing bar stand 10 is configured to include a plurality of supports 20, horizontal connecting members 21 that connect these supports 20 together, and diagonal braces 12. Therefore, the reinforcing bar stand 10 has a simple configuration and can be easily manufactured at low cost.

[0021] (2) The reinforcing bar support 24 attached to the support 20 is configured to include a horizontal section 30 whose base end is fixed to the support 20, and a vertical section 31 extending upward from the tip of the horizontal section. Therefore, simply by inserting the horizontal bars 4 into the reinforcing bar support 24 from above and placing them on the horizontal section 30, the horizontal sections 30 support the horizontal bars, and the vertical sections 31 easily prevent the horizontal bars 4 from falling off. (3) The horizontal reinforcement 4 of the wall 1 is arranged using the reinforcing bar stand 10, and in this state, the vertical reinforcement 5 is arranged in contact with the horizontal reinforcement 4. Therefore, even when large diameter reinforcing bars are used for the horizontal reinforcement 4, the horizontal reinforcement 4 and the vertical reinforcement 5 can be arranged stably, and construction costs can be reduced. Furthermore, since the reinforcing bar frame 10 is installed at the position where the wall 1 is to be constructed, no space is required to unitize the horizontal bars 4, and the horizontal bars 4 can be easily arranged even if the construction site is narrow.

[0022] The present invention is not limited to the above-described embodiment, and modifications and improvements within the scope of achieving the object of the present invention are included in the present invention. For example, in the above-described embodiment, the reinforcing bar receiving material 24 is a reinforcing bar material bent into a hook (L) shape, but it is not limited to this and may be an angle iron. Furthermore, in the above-described embodiment, in step S4, the wall formwork 8 is erected with the reinforcing bar frame 10 remaining in place, but this is not limited to this, and the reinforcing bar frame 10 may be removed and the wall formwork 8 may be erected in this state. [Explanation of symbols]

[0023] 1...Wall 2...Floor 3...Concrete body 4...Horizontal reinforcement 5...Vertical reinforcement 6...Anchor bolt 7...Nut 8...Wall formwork 10...Reinforced concrete frame 11...Frame unit 12...Diagonal brace 13...Turnbuckle 20...Support column 21...Horizontal connecting member 22...Base plate 23...Channel steel 24...Rebar support material 25...Brace connecting piece 30...Horizontal section 31...Vertical section 40...Vertical bar lifting jig 41...Through hole 42...Climbing machine

Claims

1. A reinforcing bar frame for arranging horizontal bars embedded in a reinforced concrete wall, a plurality of rack units arranged on a floor surface at predetermined distances in the length direction of the wall; and diagonal braces connecting the plurality of rack units to each other; the mounting unit includes a pair of support columns arranged on a floor surface at a predetermined distance apart in a width direction of the wall, and a plurality of horizontal connecting members provided in a vertical direction to connect the support columns to each other; Each of the supports includes a steel beam extending upward from the floor surface, and a plurality of reinforcing bar support members arranged in a vertical direction on the steel beam to which the horizontal bars are fastened. The reinforcing bar support member is hook-shaped to prevent the horizontal bars from falling off.

2. The reinforcing bar support member is formed from reinforcing bar material or structural steel, and has a horizontal portion whose base end is fixed to a support pillar, and a vertical portion extending upward from the tip of the horizontal portion.

3. A method for constructing a reinforced concrete wall using the reinforcing bar rack according to claim 1 or 2, comprising: a step of installing the reinforcing bar frame at a position on a floor surface where the wall is to be constructed; A step of locking the horizontal reinforcement of the wall to the reinforcing bar support material of the reinforcing bar frame; a step of preparing a vertical reinforcing bar lifting jig with through holes formed at predetermined intervals in the horizontal direction, inserting the vertical reinforcing bars of the wall into the through holes of the vertical reinforcing bar lifting jig, lifting the vertical reinforcing bar lifting jig with a crane in this state, and lowering it so that the vertical reinforcing bars of the wall abut against the horizontal reinforcing bars, temporarily fixing the vertical reinforcing bars to the horizontal reinforcing bars, and then removing the vertical reinforcing bar lifting jig; A step of leaving or removing the reinforcing bar frame; erecting a pair of wall forms sandwiching the horizontal reinforcement and the vertical reinforcement, and pouring concrete inside the pair of wall forms.

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