JP6259381B2 - Reinforcement structure of reinforced concrete structure and its construction method - Google Patents

Description

  The present invention relates to a bar arrangement structure in a corner portion of a reinforced concrete structure and a construction method thereof.

  In Patent Document 1, a reinforcing bar that protrudes in a loop shape is provided on the upper portion of the standing wall portion of the side wall member, and a reinforcing bar that protrudes in a loop shape is provided on the side of the top plate member. The corner space is hung over the upper space, the looped reinforcing bar of the side wall member and the looped reinforcing bar of the top plate member are connected with the reinforcing bar, and concrete is placed in the corner to place the cast concrete part. A method for constructing a concrete assembly structure to be formed is disclosed.

JP 2011-127363 A

For example, in the case of a box culvert, the reinforcing bars outside the corners were continuous from the bottom plate to the side walls or from the side walls to the top plate, so it was not possible to assemble the reinforcing bars by dividing them at the corners. Therefore, when placing concrete, it is necessary to arrange reinforcing bars continuous from the corners to the top plate, and the work is complicated.
In addition, since the reinforcing bars outside the corners that are continuous from the bottom plate to the side wall or from the side wall to the top plate are rebars that have been subjected to bending processing, in the case of large structures, the size constraints in the transport operation are exceeded. There was a case.

  On the other hand, although the thing of patent document 1 can divide | segment a corner | angular part and can assemble a reinforcing bar, the reinforcing bar | burr of a corner | angular part is processed into a loop shape, and loop-shaped reinforcing bars are mutually reinforcing bars. Since it is necessary to connect, the processing and assembly of the reinforcing bars at the corners are complicated, and further, the reinforcing bar arrangement at the corners is complicated, so that it is difficult to arrange the reinforcing reinforcing bars at the corners.

  In view of such circumstances, the present invention can be divided and assembled at the corners, and can easily assemble and reinforce reinforcing bars, and a reinforced concrete structure having such a reinforcing structure. The purpose is to provide a construction method.

  Therefore, the reinforcing bar structure of the reinforced concrete structure according to the present invention is a reinforcing bar structure in a corner portion of the side wall and the top plate of the reinforced concrete structure, or the side wall and the bottom plate, and the side wall and the top plate or the side wall. And the outer reinforcing bar arranged outside the corner portion of the bottom plate and the inner reinforcing bar arranged inside the corner portion are linear reinforcing bars, and the outer reinforcing rods are joined together by a first joining member, The outer reinforcing bar and the inner reinforcing bar are joined by a second joining member and / or the inner reinforcing bars are joined by a third joining member at an intersection.

  Further, a method for constructing a reinforced concrete structure according to the present invention is a method for constructing a reinforced concrete structure in which a side wall and a top plate, or a side wall and a bottom plate are joined, and the side wall and the top plate, or the side wall and the bottom plate. The outer reinforcing bar arranged outside the corner part and the inner reinforcing bar arranged inside the corner part are linear reinforcing bars, and the side wall reinforcing bar unit and the top plate reinforcing bar unit, or the side wall reinforcing bar unit and the bottom plate reinforcing bar unit are provided. A step of assembling, a step of attaching a first joining member for joining the outer reinforcing bars to the outer reinforcing bar of the top slab reinforcing bar unit or the bottom slab reinforcing bar unit, and the outer side of the top slab reinforcing bar unit or the bottom slab reinforcing bar unit Attaching a second joining member for joining the outer reinforcing bar and the inner reinforcing bar to the reinforcing bar and the inner reinforcing bar, and the side wall reinforcing bar unit. And the top plate reinforcing bar unit, or the side wall reinforcing bar unit and the bottom plate reinforcing bar unit, and the side wall of the first connecting member and the second connecting member attached to the top plate reinforcing bar unit or the bottom plate reinforcing bar unit. Engaging the outer reinforcing bar and the inner reinforcing bar of the reinforcing bar unit, and fixing the first joining member and the second joining member.

Further, a method for constructing a reinforced concrete structure according to the present invention is a method for constructing a reinforced concrete structure in which a side wall and a top plate, or a side wall and a bottom plate are joined, and the side wall and the top plate, or the side wall and the bottom plate. The outer reinforcing bar arranged outside the corner part and the inner reinforcing bar arranged inside the corner part are linear reinforcing bars, and the side wall reinforcing bar unit and the top plate reinforcing bar unit, or the side wall reinforcing bar unit and the bottom plate reinforcing bar unit are provided. A step of assembling, and placing the concrete on the side wall reinforcing bar unit and the top slab reinforcing bar unit or the side wall reinforcing bar unit and the bottom slab reinforcing bar unit except for the corner portion, and making the side wall precast and top plate made of precast concrete. Producing a precast or sidewall precast and bottom plate precast;
A step of attaching a first joining member for joining the outer reinforcing bars to the outer reinforcing bar protruding from the top plate precast or the bottom plate precast; and the outer reinforcing bar and the inner side protruding from the top plate precast or the bottom plate precast Attaching a second joining member for joining the outer reinforcing bar and the inner reinforcing bar to a reinforcing bar, assembling the sidewall precast and the top plate reinforcing bar precast, or the sidewall precast and the bottom plate precast, Alternatively, the step of engaging the outer reinforcing bar and the inner reinforcing bar projecting from the side wall precast with the first joining member and the second joining member attached to the bottom plate precast, and the first joining member and the second joining member. Fixing the joining member.

  According to the above invention, it is possible to divide and assemble reinforced concrete structures at the corners, easily carry out the reinforcing bar tip assembly method and precast block method, and do not need to bend the reinforcing bars that make up the corners As a result, the number of man-hours for reinforcing bars can be reduced, and the assembly of reinforcing bars and the arrangement of reinforcing bars are facilitated by a simple reinforcement structure.

It is sectional drawing which shows the bar arrangement structure in one Embodiment of this invention. It is a perspective view of a sheet metal fixing metal (first joining member) in an embodiment of the present invention. It is an enlarged view of the junction part by the metal fitting made from sheet metal in one embodiment of the present invention. 1 is a perspective view of a sheet metal fixing metal member having a notch formed therein according to an embodiment of the present invention. FIG. 3 is an enlarged view of a fixing metal member made of a sheet metal having a main body portion in an arc shape in an embodiment of the present invention. It is a perspective view of a fixing metal provided with a stiffening rib in an embodiment of the present invention, (A) is a fixing metal provided with a stiffening rib on a portion that is outside the corner, (B) is a corner. It is a perspective view of the fixing metal fitting which provided the stiffening rib in the part used as the inside. It is a perspective view of the fixing metal provided with a pair of stiffening ribs in one embodiment of the present invention, and (A) is a fixing metal provided with a pair of stiffening ribs in the part which becomes the outside of the corner, (B) FIG. 5 is a perspective view of a fixing hardware in which a pair of stiffening ribs are provided on the inside of the corner portion. It is sectional drawing of the sleeve type fixing metal fitting (1st joining member) in one Embodiment of this invention. It is sectional drawing of the sleeve type fixing metal fitting in one Embodiment of this invention. It is sectional drawing of the sleeve type fixing metal fitting in one Embodiment of this invention. FIG. 3 is a perspective view of a connector (second joining member) according to an embodiment of the present invention, in which (A) is a fixing metal whose cross section of the sleeve is an O type, and (B) is a fixing metal whose cross section of the sleeve is a C type. FIG. It is sectional drawing of the connector (2nd joining member) in one Embodiment of this invention, (A) is a figure of the cross section orthogonal to the axis | shaft of the sleeve 62a, (B) is a figure of the cross section orthogonal to the axis | shaft of the sleeve 62b. It is. It is an expansion perspective view of the joined part by the cross fixing metal fitting (3rd joining member) in one embodiment of the present invention. It is the elements on larger scale which show the structure where a reinforcing bar is connected to the fixing metal fitting (1st joining member) made from sheet metal in one embodiment of the present invention. It is a figure which shows the attachment process of the joining member to the top plate reinforcing bar unit in one Embodiment of this invention. It is a figure which shows the erection process (engagement process of the side wall reinforcement to a joining member) of the top plate reinforcement unit to the upper part of the side wall reinforcement unit in one Embodiment of this invention. It is a figure which shows the fixing process of the joining member in one Embodiment of this invention. It is sectional drawing which shows the bar arrangement structure in the precast block construction method in one Embodiment of this invention. It is sectional drawing which shows the bar arrangement structure which joins a reinforcing bar with the fixing metal object (1st joining member) and connector (2nd joining member) in one Embodiment of this invention. It is sectional drawing which shows the bar arrangement structure which joins a reinforcing bar with the fixing metal fitting (1st joining member) and the cross fixing metal fitting (3rd joining member) in one Embodiment of this invention.

Embodiments of the present invention will be described below.
FIG. 1 shows an example of a bar arrangement structure of a reinforced concrete structure according to the present invention.
The reinforced concrete structure 10 in FIG. 1 is a structure such as a box culvert composed of a pair of side walls 20 disposed opposite to each other and a top plate 30 spanned over the side walls 20.
In FIG. 1, a corner 40 formed by the side wall 20 on one side and one end of the top plate 30 is shown.

The side wall 20 includes an outer vertical reinforcing bar 21a, an inner vertical reinforcing bar 21b, a lower hunch reinforcing bar 21c, a distribution reinforcing bar 21d, and a wall shear reinforcing bar 21e.
On the other hand, the top plate 30 includes an upper edge reinforcing bar 31a, a lower edge reinforcing bar 31b, an upper hunch reinforcing bar 31c, a distribution reinforcing bar 31d, and a shear reinforcing reinforcing bar 31e.

Here, the outer vertical reinforcing bar 21 a and the upper edge reinforcing bar 31 a are reinforcing bars (outer reinforcing bars) arranged outside the corner portion 40, and the inner vertical reinforcing bar 21 b and the lower edge reinforcing bar 31 b are inside the corner portion 40. It is a reinforcing bar (inner reinforcing bar) to be arranged.
Then, the reinforced concrete structure 10 is divided into a plurality of precast concrete members (precast segments) including the side wall precast 22 and the top plate precast 32, and these are assembled on site, or the reinforcing bars constituting the side wall 20 are provided first. A unit reinforcing bar which is divided into a plurality of pre-assembled reinforcing bar units including a side-bar reinforcing bar unit 21 assembled and a top reinforcing bar unit 31 formed by pre-assembling the reinforcing bars constituting the top plate 30, and these are assembled and put in place. It is constructed by the construction method (steel bar tip assembly method).

  In the case of the unit reinforcing bar method, the side wall reinforcing bar unit 21 and the top bar reinforcing bar unit 31 are assembled in advance at a factory or the like, and the side wall reinforcing bar unit 21 is built in the construction site. It is built and the rebar units 21 and 31 are connected, and then concrete work (place-in-place) such as installation of formwork or concrete placement is performed.

Further, in the case of the precast block method, the rebar units 21 and 31 are assembled at a factory or the like, and concrete casting is performed to manufacture the precast segments of the side wall precast 22 and the top plate precast 32.
Then, after the side wall precast 22 is installed at the construction site, the top plate precast 32 is spanned by opening the corner 40 on the upper side of the side wall precast 22, and the reinforcing bar and the top plate precast 32 projected above the side wall precast 22. The steel bars are joined to the steel bars protruding sideways, and then concrete is cast in the corners 40.

Next, the reinforcing bar arrangement structure in the corner portion 40 will be described in detail.
The outer vertical reinforcing bar 21a, the inner vertical reinforcing bar 21b, and the upper edge reinforcing bar 31a and the lower edge reinforcing bar 31b of the top plate 30 are linear reinforcing bars (straight joints) that are not bent.

Further, when the side wall reinforcing bar unit 21 (side wall precast 22) and the top plate reinforcing bar unit 31 (top plate precast 32) are combined, the extension line of the outer vertical reinforcing bar 21a and the extension line of the upper edge reinforcing bar 31a are the corners. 40, the outer vertical reinforcing bar 21a and the upper edge reinforcing bar 31a are arranged so as to be orthogonal to each other, and the front end of the outer vertical reinforcing bar 21a and the upper edge reinforcing bar 31a is a predetermined distance from the orthogonal position (intersection position) CP. It becomes a position, and it arrange | positions so that a predetermined space | interval may be provided between the front-end | tip of the outer side vertical reinforcement 21a, and the front-end | tip of the upper edge reinforcement 31a.
And the front-end | tip part of the outer vertical rebar 21a and the front-end | tip part of the upper edge rebar 31a (outside rebars) are joined by the fixing metal fitting (1st joining member) 50.

On the other hand, the tip of the inner vertical reinforcing bar 21 b of the side wall reinforcing bar unit 21 is arranged so as to intersect the upper edge reinforcing bar 31 a of the top plate reinforcing bar unit 31, and the tip of the lower edge reinforcing bar 31 b of the top plate reinforcing bar unit 31. Is arranged so as to cross the outer vertical reinforcing bar 21 a of the top plate reinforcing bar unit 31.
And the front-end | tip part of the inner side vertical reinforcing bar 21b and the upper edge reinforcing bar 31a are joined by the connection tool (2nd joining member) 60 in T shape, and the front-end | tip part of the lower edge reinforcing bar 31b and the outer side vertical reinforcing bar 21a are connected. (Two joining members) 61 are joined in a T shape.

Here, the pair of outer vertical reinforcing bar 21a and upper edge reinforcing bar 31a are extended on the same plane, but the inner vertical reinforcing bar 21b and the lower edge reinforcing bar 31b cross each other, so the outer vertical reinforcing bar 21a and the upper edge reinforcing bar 31a intersect. The inner vertical reinforcing bar 21b and the lower edge reinforcing bar 31b cannot be extended on the same plane as the plane in which the reinforcing bar 31a is extended.
For this reason, the outer vertical reinforcing bar 21a and the lower edge reinforcing bar 31b are arranged with their axes shifted from each other, and the upper edge reinforcing bar 31a and the inner vertical reinforcing bar 21b are arranged with their axes shifted. Therefore, the connection tools 60 and 61 are members (joint fittings) that join one reinforcing bar and the other reinforcing bar in a T-shape with their axes shifted from each other.

  Further, the lower hunch reinforcing bar 21c of the side wall reinforcing bar unit 21 and the upper hunch reinforcing bar 31c of the top plate reinforcing bar unit 31 are a combination of the side wall reinforcing bar unit 21 (side wall precast 22) and the top plate reinforcing bar unit 31 (top plate precast 32). The two ends are opposed to each other with a predetermined gap. The end portion of the lower hunch reinforcing bar 21 c and the upper hunch reinforcing bar 31 c are joined by a coupler (fourth joining member) 70.

Further, a portion where the inner vertical reinforcing bar 21 b and the lower edge reinforcing bar 31 b intersect is joined by a cross fixing metal fitting (third joining member) 80.
Although FIG. 1 shows the bar arrangement structure at the corner portions of the side wall and the top plate, it is obvious that the same bar arrangement structure can be applied at the corner portions of the side wall and the bottom plate. That is, the bar arrangement structure in which the top and bottom in FIG. 1 are inverted corresponds to the bar arrangement structure at the corners of the side wall and the bottom plate.

Next, each joining member (joining metal fitting) used for joining reinforcing bars in the corner portion 40 will be described in detail.
FIG. 2 is an example of a fixing hardware 50 that joins the tip of the outer vertical reinforcing bar 21a and the tip of the upper edge reinforcing bar 31a when the outer vertical reinforcing bar 21a and the upper edge reinforcing bar 31a are screw reinforcing bars.

  The fixing hardware 50 shown in FIG. 2 includes a plate-shaped first joint 50a (first fixing plate) orthogonal to the axis of the outer vertical reinforcing bar 21a and a plate-shaped second joint orthogonal to the axis of the upper edge reinforcing bar 31a. 50b (first fixing plate) and a sheet metal member integrally provided with a plate-like main body portion 50c that connects the first joint portion 50a and the second joint portion 50b. A through hole (first opening) 50d through which the reinforcing bar 21a passes is opened, and a through hole (second opening) 50e through which the upper edge reinforcing bar 31a passes is opened at the second joint 50b.

Then, as shown in FIG. 3, the outer vertical reinforcing bar 21a is passed through the through hole 50d of the fixing hardware 50, and the nut 51a is screwed to the tip of the outer vertical reinforcing bar 21a protruding from the through hole 50d to be fixed. One end (first joint 50a) of the hardware 50 is fixed to the tip of the outer vertical reinforcing bar 21a.
Similarly, the upper edge reinforcing bar 31a is passed through the through hole 50e of the fixing metal 50, and the nut 51b is screwed and tightened to the tip of the upper edge reinforcing bar 31a protruding from the through hole 50e, whereby the other end ( The second joint 50b) is fixed to the tip of the upper edge reinforcing bar 31a.

In this manner, the first joint 50a of the fixing metal 50 is fixed to the outer vertical reinforcing bar 21a, and the second joint 50b of the fixing metal 50 is fixed to the upper edge reinforcing bar 31a, whereby the outer vertical reinforcing bar of the side wall 20 is fixed. 21 a and the upper edge reinforcing bar 31 a of the top plate 30 are joined by the fixing hardware 50.
In the example shown in FIG. 3, the nuts 51a and 51b are nuts integrally provided with a screw portion 52 and a disk-shaped fixing plate (flange portion) 53 that are screwed into the screw joint reinforcing bar. A cylindrical or hexagonal column nut without the plate 53 can also be used.

In the example shown in FIG. 3, as the nuts 51 a and 51 b, penetration type nuts through which the threaded reinforcing bars penetrate are used, but bottomed nuts having a bottom part against which the threaded joints abut can also be used.
When using nuts 51a and 51b that are of a penetration type and have a fixing plate 53, as shown in FIG. 3, the nuts 51a and 51b can be screwed into the reinforcing bar so that the fixing plate 53 is pressed against the fixing metal 50, Further, the nuts 51a and 51b can be screwed into the reinforcing bar so that the fixing plate 53 is separated from the fixing metal 50 in the direction opposite to that shown in FIG.

Further, the openings provided in the joint portions 50a and 50b of the fixing metal 50 can be formed as notches 50g and 50h as shown in FIG. 4 in place of the through holes 50d and 50e.
Moreover, a through-hole can be formed in one of the joining parts 50a and 50b, and a notch can be formed in the other.

Further, when the notches 50g and 50h are formed in both the joint portions 50a and 50b, as shown in FIG. 4, the opening directions of the notches 50g and 50h are the same direction orthogonal to the plane including the reinforcing bars 21a and 31a. Also, the directions can be opposite to each other.
The fixing hardware 50 shown in FIGS. 2 to 4 has two bent portions and is composed of three plate-like portions. The fixing hardware 50 may be formed into an L shape with one bent portion or be bent into the main body portion 50c. The main body 50c may be formed in an arc shape that protrudes toward the outside of the corner 40 as shown in FIG.

Further, a plurality of fixing metal objects 50, which are sheet metal members, can be used in a stacked manner.
Further, the thickness of the fixing metal object 50 which is a sheet metal member can be set to about 0.6 times the diameter of the reinforcing bar, for example.
Further, it is possible to increase the rigidity by providing the fixing metal 50 which is a sheet metal member, and FIGS. 6 and 7 illustrate the fixing metal 50 including the stiffening rib.

6A and 6B are examples in which a plate-like stiffening rib is erected at the center of the end face of the main body 50c.
6A is provided with through holes 50d and 50e on the end surface of the main body 50c that is outside the corner portion 40 (on the end surface of the main body 50c on the side facing the joints 50a and 50b). A plate-like stiffening rib 55 is erected by welding substantially along the connecting line.
In the fixing hardware 50 of FIG. 6B, a plate-shaped stiffening rib 55 is erected by welding on the end face of the main body portion 50c that is inside the corner portion 40 along a line connecting the through holes 50d and 50e. It is.

FIGS. 7A and 7B are examples in which plate-like stiffening ribs 55 are provided substantially opposite to each other on both side edges of the main body 50c.
The fixing hardware 50 in FIG. 7A is stiffened on both side edges of the main body portion 50c so that the pair of stiffening ribs 55 face each other on the outer side of the corner portion 40 of the main body portion 50c. Ribs 55 are provided.
7 (B) is stiffened on both side edges of the main body 50c so that the pair of stiffening ribs 55 are opposed substantially parallel to the inner side of the corner 40 of the main body 50c. Ribs 55 are provided.

Note that the stiffening rib 55 shown in FIGS. 7A and 7B can be formed integrally with the joints 50a and 50b and the main body 50c by pressing, and is a plate formed as a separate part. The stiffening rib 55 can be fixed to the fixing hardware 50 (main body portion 50c) by welding or the like.
In the above embodiment, the fixing metal object 50 is a sheet metal member having an opening such as a through hole or a notch through which the reinforcing bar penetrates, but the sleeve into which the distal end of the outer vertical reinforcing bar 21a is inserted, and the upper edge It can be set as a sleeve-type joining member provided with the sleeve in which the front-end | tip part of the reinforcing bar 31a is inserted. The sleeve-type fixing metal 50 is formed of, for example, a casting.

FIG. 8 shows an example of a sleeve-type fixing hardware 50.
8 has a bottomed sleeve (cylindrical portion) 56a into which the tip of the outer vertical reinforcing bar 21a is inserted, and a bottomed sleeve (cylindrical portion) into which the tip of the upper edge reinforcing bar 31a is inserted. 56b and a connecting portion 56c for connecting the bottom end portions of both sleeves 56a, 56b are integrally formed, and the axis of the sleeve 56a and the axis of the sleeve 56b are formed so as to be orthogonal to each other on the same plane.

The connecting portion 56c of the fixing hardware 50 in FIG. 8 is formed in a straight line so as to obliquely intersect the axis of each of the sleeves 56a and 56b. For example, as shown in FIG. It can be formed in an arc shape that is convex toward the outside of the corner portion 40.
Further, in the fixing hardware 50 shown in FIG. 10, the connecting portion 56c has an L-shape bent substantially at a right angle, the sleeve 56a is open at both ends, and the opening 56d (intersection position) on the back side in the reinforcing bar insertion direction of the sleeve 56a. The opening 56d) closer to the CP can be used as a grout filling port.

When the fixing hardware 50 shown in FIG. 10 is used for joining the outer vertical reinforcing bar 21a of the side wall 20 and the reinforcing bar outside the corner portion of the bottom wall, the opening 56d of the sleeve 56a is closed with a rubber plug or the like. Thus, it can be shared as a joining member with the reinforcing bar of the bottom wall reinforcing bar unit.
In the sleeve-type fixing hardware 50, both the sleeves 56a and 56b are so-called mortar sleeves that fix the reinforcing bars by filling with grout, and the outer circumferences of the reinforcing bars 21a and 31a inserted into both the sleeves 56a and 56b and the sleeves 56a and 56b. The fixing metal 50 is fixed to the reinforcing bars 21a and 31a by filling the annular space between the inner peripheral surface with grout (mortar) and hardening, and the reinforcing bars 21a and 31a are joined by the fixing metal 50.

When both sleeves 56a and 56b are mortar sleeves, the inner peripheral surfaces of both sleeves 56a and 56b are provided with irregularities, and the fitting length of the reinforcing bars in both sleeves 56a and 56b is about six times the diameter of the reinforcing bars. To do.
Further, when the reinforcing bars 21a and 31a are threaded joint reinforcing bars, one of the sleeves 56a and 56b can be a screw coupler in which a female thread into which the threaded reinforcing bars are screwed is formed on the inner peripheral surface. In the case of a threaded coupler, the fitting length of the reinforcing bar can be about three times the diameter of the reinforcing bar, and the fitting length (the length of the fixing hardware 50) is shorter than that of the mortar sleeve.

Next, an example of the connection tools 60 and 61 will be described.
In the connection tools 60 and 61 illustrated in FIG. 11, the sleeve 62a through which the outer vertical reinforcing bar 21a or the upper edge reinforcing bar 31a passes and the sleeve 62b into which the distal end portion of the inner vertical reinforcing bar 21b or the lower edge reinforcing bar 31b is inserted are integrated. For example, it is formed by casting.

The outer vertical reinforcing bar 21a and the upper edge reinforcing bar 31a are arranged on the same plane, but the inner vertical reinforcing bar 21b and the lower edge reinforcing bar 31b cross each other in the middle, and the tip part is a corner portion in the other reinforcing bar unit. In order to reach the reinforcing bars (outer reinforcing bars) on the outside of 40, the axis is displaced with respect to the outer reinforcing bars of the other reinforcing bar unit.
Therefore, as shown in FIGS. 12A and 12B, the sleeves 62a and 62b of the connection tools 60 and 61 correspond to the axial deviation between the outer reinforcing bar and the inner reinforcing bar to be joined, It is formed by shifting the axis AX1 of the sleeve 62a and the axis AX2 of the sleeve 62b by a predetermined distance D1 in a direction perpendicular to the plane including the upper edge reinforcing bar 31a.

The sleeves 62a and 62b can be mortar sleeves that are both fixed to the rebar by filling with grout.
In addition, when the reinforcing bars of the side wall 20 and the top plate 30 are screw rebars, for example, a female screw portion is provided for screwing a sleeve fixed to the upper edge reinforcing bar 31a and the lower edge reinforcing bar 31b of the top plate 30 to the screw reinforcing bar. A sleeve fixed to the outer vertical reinforcing bar 21a and the inner vertical reinforcing bar 21b of the side wall 20 can be used as a mortar sleeve.

Further, as shown in FIG. 11A, the sleeve 62a through which the outer vertical reinforcing bar 21a and the upper edge reinforcing bar 31a penetrate can be a sleeve having an annular cross section (O-type sleeve). 11 (B), a C-shaped sleeve having an opening 62c in a partial region in the circumferential direction can be obtained.
When the sleeve 62a is a C-shaped sleeve, the width 62 of the opening 62c in the cross section is made larger than the diameter of the outer rebar, so that the sleeve 62a (connectors 60, 61) is covered with the rebar. Can be attached.

Next, an example of the cross-fixed hardware 80 will be described.
As the cross-fixing hardware 80, a commercially available reinforcing steel bar fitting, for example, Zesslock (trade name) manufactured by Zen Giken Co., Ltd. can be used.

  As shown in FIG. 13, the cross-fixing metal piece 80 is formed with a semicircular groove (recess) 80a into which a reinforcing bar is fitted, and a plurality of bolt through holes 80b on both sides of the groove 80. The plate 80c is configured to include a pair of U-shaped bolts 80d into which the male screw portions at both ends are inserted into the bolt through holes 80b, and a nut 80e that is screwed to the tip of the U-shaped bolt 80d.

Then, the plate 80c is placed so that one of the lower edge reinforcing bar 31b and the inner vertical reinforcing bar 21b fits in the groove 80a at the intersecting part of the lower edge reinforcing bar 31b and the inner vertical reinforcing bar 21b (the intersecting part of the inner reinforcing bars).
Next, both ends of the pair of U-shaped bolts 80d are opened in the plate 80c so that the other reinforcing bar is sandwiched between the U-shaped bolt 80d and the plate 80c on both sides of the groove 80. The lower edge reinforcing bar 31b and the inner vertical reinforcing bar 21b are joined at the crossing part by screwing and tightening nuts 80e to both ends (male screw parts) of the U-shaped bolt 80d protruding through the plate 80c and protruding from the plate 80c.

The cross-fixing hardware 80 is not limited to the structure shown in FIG.
For example, a semicircular groove into which the lower edge reinforcing bar 31b is fitted and a semicircular shape into which a plurality of bolt through holes are formed on both sides of the groove and a semicircular shape into which the inner vertical reinforcing bar 21b fits are formed. And a second plate in which a plurality of bolt through holes are formed on both sides of the groove, and the bolt is passed through the bolt through hole of the first plate and the bolt through hole of the second plate. The lower edge reinforcing bar 31b and the inner vertical reinforcing bar 21b are joined so that the lower edge reinforcing bar 31b and the inner vertical reinforcing bar 21b are sandwiched between the first plate and the second plate by screwing and tightening the nut. A cross-fixed hardware 80 or the like can be used.

Next, the effect of the bar arrangement structure will be described.
According to the bar arrangement structure, since the side wall 20 and the top plate 30 can be divided at the corner portion 40, it can be applied to a reinforcing bar tip assembling method or a precast method.
In addition, it is not necessary to bend the reinforcing bars arranged outside and inside the corner portion 40, and a straight reinforcing bar that extends in a straight line can be used, so that the number of processing steps of the reinforcing bars can be reduced and the conveyance is easy. Will be able to do.

Further, by joining the outer vertical reinforcing bar 21a and the upper edge reinforcing bar 31a with the fixing metal fitting 50, the bearing area equivalent to the case of using the outer reinforcing bar which is bent in an arc shape at the corner 40 and continues from the side wall to the top plate is used. It is possible to sufficiently prevent the occurrence of destruction (local bearing failure) due to local crushing when receiving an external force (negative bending moment) in the direction in which the corner 40 is closed.
In the corner portion, when an external reinforcing bar that is bent in an arc shape and is continuous from the side wall to the top plate (or the bottom plate) shown by a dotted line in FIG. 3 or FIG. 10 is used, an external force is applied in the direction of closing the corner portion. Then, a compressive force is applied to the inner concrete from the bent reinforcing bars.

The bearing area of the reinforcing bar at this time is the projected area of the bent part of the reinforcing bar on the plane orthogonal to the direction from the outer corner to the inner corner of the corner 40, and the radius of bending at the core of the reinforcing bar is 11φ, for example. Assuming that (φ = rebar diameter), the length L1 in the projection plane of the rebar bending portion is L1 = √2 × 11φ = 15.6φ, and the bearing area (projection area) A1 is A1 = 15.6φ ×. φ = 15.6φ ² .

On the other hand, when the sheet metal fixing metal 50 shown in FIG. 3 is used, the fixing is based on the fact that the plate short side length of the plate fixing type shear reinforcing bar is about 2.2 to 2.4 times the bar diameter φ. When the width W1 of the hardware 50 is set to width W1 = rebar diameter φ × 2.3, and the distance from the point CP where the extension line of the outer reinforcing bar provided in a straight line intersects the attachment portion of the fixing hardware 50 is 5φ, The length L2 in the projection plane of the sheet metal fixing metal 50 is L2 = √2 × 5φ = 7.1φ, and the bearing area A2 is A2 = 7.1φ × 2.3φ = 16.3φ ² .

Further, when the sleeve-type fixing hardware 50 shown in FIG. 10 is used and the sleeve is a screw coupler, the diameter of the screw coupler is, for example, 1.5 times the reinforcing bar diameter φ, and the length of the sleeve (screw coupler) is the reinforcing bar. When the diameter φ is 6.5 times, the length L3 in the projection plane of the sleeve-type fixing hardware 50 is L3 = √2 × 6.5φ = 9.2φ, and the bearing area A3 is A3 = 9.2φ. × 1.5φ = 13.8φ ²

Further, when the sleeve-type fixing hardware 50 shown in FIG. 10 is used and the sleeve is a mortar sleeve, the diameter of the mortar sleeve is 2.1 times the reinforcing bar diameter φ, and the length of the sleeve is 5. If it is 0 times, the length L4 in the projection plane of the fixing hardware 50 is L4 = √2 × 5.0φ = 7.0φ, and the bearing area A3 is A3 = 7.0φ × 2.1φ = 14.7φ. ²

Thus, the outer vertical reinforcing bar 21a of the side wall 20 extending linearly toward the corner portion 40, and the upper edge reinforcing bar 31a of the top plate 30 extending linearly toward the corner portion 40, Is fixed by the fixing metal 50 at the corner portion 40, and the bearing area A equivalent to that in the case where the outer reinforcing bar of the corner portion 40 is a continuous reinforcing bar bent in an arc shape is secured. It is possible to make the bearing stress level, and it is possible to sufficiently suppress the destruction (local bearing failure) due to the local collapse at the corner portion 40.
In other words, fixing is performed such that the outer rebar of the corner portion 40 is a continuous rebar that is bent into an arc shape (for example, the inner radius of bending is 10φ) and has the same projected area (bearing area). Using the hardware 50, the outer vertical reinforcing bar 21a of the side wall 20 extending linearly toward the corner 40 and the upper edge reinforcing bar of the top plate 30 extending linearly toward the corner 40 By joining to 31a, it is possible to obtain a bearing stress equivalent to the case of using a bent outer continuous reinforcing bar.

  Further, when the outer vertical reinforcing bar 21a and the upper edge reinforcing bar 31a are joined by the fixing hardware 50, the diameter of the outer vertical reinforcing bar 21a and the diameter of the upper edge reinforcing bar 31a can be made different. For example, the diameter of the reinforcing bar is changed. Thus, the side wall 20 and the top plate 30 can have the same resistance bending moment, and the design can be rationalized.

Further, when a continuous reinforcing bar bent in an arc shape is used as a reinforcing bar disposed outside the corner portion 40, the radius (inner diameter) in the bending process is restricted by a minimum value corresponding to the reinforcing bar diameter, Since the generation of an extremely large bearing stress can be suppressed by increasing the bending radius, a reinforcing bar having a bending radius of about 10φ is used.
On the other hand, when the outer vertical reinforcing bar 21a and the upper edge reinforcing bar 31a are joined by the fixing metal 50, the reinforcing bar 50 and the fixing metal 50 are disposed at the same position as the case where the bending radius is set to about 5φ. Thus, an equivalent bearing area can be secured.

Then, if the length of the reinforcing bar that extends linearly is increased by reducing the bent portion of the reinforcing bar outside the corner portion 40, the inner area surrounded by the outer reinforcing bar at the corner portion 40 is expanded. For this reason, it is easy to dispose reinforcing reinforcing bars that resist bending moments in the direction in which the corner portion 40 opens and / or closes in the inner region surrounded by the outer reinforcing bars.
Further, according to the bar arrangement structure, the end portions of the inner vertical reinforcing bar 21b and the lower edge reinforcing bar 31b at the corner 40 are not hook fixings bent at a right angle, but the inner vertical reinforcing bar 21b is connected by the connecting tool 60. The upper edge reinforcing bar 31 a and the lower edge reinforcing bar 31 b are mechanically fixed to the outer vertical reinforcing bar 21 a by the connector 61. Therefore, it is possible to reduce the amount of reinforcing bars that resist bending moment in the direction in which the corner portion 40 opens, while improving the complexity of the reinforcing bars and being applicable to the reinforcing bar tip assembling method and the precast method. There is an effect.

Here, when a reinforcing bar extending inward and outward of the corner portion 40 is provided as a reinforcing bar for an external force (positive bending moment) in a direction in which the corner portion 40 opens, one end of the reinforcing bar may be joined to the fixing metal 50. it can.
FIG. 14 shows an example in which one end of the reinforcing bar 90 is connected to the fixing metal 50 made of sheet metal as shown in FIG.

  In the example of FIG. 14, the fixing metal 50 is a sheet metal member that includes a first joint 50 a, a second joint 50 b, and a main body 50 c that connects the first joint 50 a and the second joint 50 b. A through hole 50f that allows one end of the reinforcing reinforcing bar 90 to pass through is opened in the main body 50c. The reinforcing bar 90 is a reinforcing bar for resisting an external force (positive bending moment) in the direction in which the corner is opened, and is obliquely along the inside / outside direction of the corner 40 and obliquely outside the corner. It is a reinforcing bar that spans between the reinforcing bar and the inner reinforcing bar.

Then, one end of the reinforcing reinforcing bar (reinforcing screw joint reinforcing bar) 90 is passed through the through-hole 50f, and the nut 51c is screwed into the tip of the reinforcing reinforcing bar 90 protruding from the main body 50c and tightened, thereby tightening the reinforcing reinforcing bar 90. One end is joined to the fixing metal 50. The other end of the reinforcing bar 90 is joined to the inner vertical reinforcing bar 21b or the lower edge reinforcing bar 31b.
The fixing metal 50 to which the reinforcing reinforcing bar 90 is bonded is not limited to the fixing metal 50 made of sheet metal, and the reinforcing reinforcing bar 90 can be bonded to the sleeve-type fixing metal 50 made of casting.

When the sleeve-type fixing hardware 50 is used, a third sleeve (mortar sleeve or screw coupler) for inserting one end of the reinforcing reinforcing bar 90 is used as a pair of outer vertical reinforcing bars 21a and a pair of upper edge reinforcing bars 31a. It forms integrally with sleeve 56a, 56b, and inserts and joins the end of reinforcement bar 90 to the sleeve for the reinforcement bar.
Also, a plurality of reinforcing bars 90 can be joined to the fixing hardware 50.

  As described above, if one end of the reinforcing bar 90 is joined to the fixing hardware 50, in the bar arrangement structure in which the outer reinforcing bars at the corners are joined by the fixing hardware 50, the degree of freedom of the reinforcing reinforcing bars can be set. The rigidity and proof stress of the corner portion 40 can be sufficiently increased.

Next, as a method for constructing the bar arrangement structure, a step in the unit reinforcing bar method will be exemplified.
FIG. 15 shows the pre-assembled side wall reinforcing bar unit 21 and the pre-assembled top plate reinforcing bar unit 31.

The side wall reinforcing bar unit 21 in FIG. 15 is an assembly of an outer vertical reinforcing bar (outer reinforcing bar) 21a, an inner vertical reinforcing bar (inner reinforcing bar) 21b, a lower hunch reinforcing bar 21c, a distribution reinforcing bar 21d, and a wall shear reinforcing reinforcing bar 21e.
Then, a coupler (fourth joining member) 70 for joining the lower hunch reinforcing bar 21c and the upper hunch reinforcing bar 31c is loosely fitted to the lower hunch reinforcing bar 21c and is sent below the joining position of the hunch reinforcing bar. Leave it in.

The wall shear reinforcing bar 21e is pre-assembled at a lower part than the lower edge reinforcing bar 31b of the top plate, but after the side wall reinforcing bar unit 21 and the top plate reinforcing bar unit 31 are assembled, the corner portion 40 or the like. Can be added.
15 is an assembly of an upper edge reinforcing bar 31a, a lower edge reinforcing bar 31b, an upper hunch reinforcing bar 31c, a distribution reinforcing bar 31d, and a shear reinforcing bar 31e, and a predetermined position of the upper edge reinforcing bar 31a. The fixing hardware 50 and the connection tool 60 are attached to the front end, and the connection tool 61 is attached to the tip of the lower edge reinforcing bar 31b (attachment member attaching step).

The wall shear reinforcing bar 31e is pre-assembled in a portion on the right side (the opposite side wall side) in FIG. 15 from the joint portion of the hunch reinforcing bar, but after the side wall reinforcing bar unit 21 and the top plate reinforcing bar unit 31 are assembled. It can be added to the corner 40 or the like.
The connection tool 60 is attached to the sleeve 62a through the upper edge reinforcing bar 31a.

Further, when the metal plate fixing metal 50 shown in FIG. 3 or the like is used, the upper metal bar 50a is penetrated through the upper edge reinforcing bar 31a through the through hole 50e opened in the second joint 50b of the metal fixing metal 50. It is attached to the edge reinforcing bar 31a.
Moreover, the connecting tool 61 is attached to the front-end | tip of the lower edge reinforcement 31b by inserting the front-end | tip part of the lower edge reinforcement 31b in the sleeve 62b.

The connection tools 60 and 61 and the fixing hardware 50 can be attached to a predetermined position of the top plate reinforcing bar unit 31 in a temporarily fixed state using a clamp metal fitting for temporary fixing, or can be attached by filling a nut or grout. It can be fixed to the plate reinforcing bar unit 31.
Further, when attaching the connection tools 60 and 61 and the fixing hardware 50 to predetermined positions of the top plate reinforcing bar unit 31, a positioning jig can be used. The positioning jig engages with the connection tools 60 and 61 and the fixing hardware 50 instead of the reinforcing bars of the side wall reinforcing bar unit 21, so that the connection tools 60 and 61 and the fixing hardware 50 are attached to the top plate reinforcing bar unit 31. It is a jig that regulates.

Further, when the sleeve 62a through which the upper edge rebar 31a of the connection tool 60 penetrates and the sleeve 62b into which the lower edge rebar 31b of the connection tool 61 is inserted is a screw coupler, and / or the upper edge rebar of the sleeve-type fixing hardware 50. When the sleeve 56b into which the tip of 31a is inserted is a screw coupler, the reinforcing bars 31a and 31b, which are screw joint reinforcing bars, are screwed into these screw couplers, so that the connecting tools 60 and 61 to the top plate reinforcing bar unit 31 are obtained. The fixing hardware 50 is attached.
However, even when the sleeve 62a of the connection tool 60 and the sleeve 62b of the connection tool 61 are screw couplers, the vertical sleeve through which the vertical reinforcing bars 21a and 21b of the side wall reinforcing bar unit 21 are inserted, that is, the sleeve 62b of the connection tool 60. The sleeve 62a of the connector 61 is a mortar sleeve.

As described above, after the step of attaching the joining members (connectors 60 and 61 and the fixing hardware 50) to the top plate reinforcing bar unit 31, the assembling step of the reinforcing bar units 21 and 31 (the reinforcing member of the side wall reinforcing bar unit 21 is engaged with the joining member). Step).
In the assembling process of the reinforcing bar unit, the side wall reinforcing bar unit 21 is built on the site, and the top plate reinforcing bar unit 31 is built from above the side wall reinforcing bar unit 21 (see FIG. 16).

  At that time, the outer vertical reinforcing bar 21a of the side wall reinforcing bar unit 21 penetrates through the sleeve 62a of the connecting tool 61 attached to the tip of the lower edge reinforcing bar 31b of the top plate reinforcing bar unit 31, and the upper edge reinforcing bar 31a of the top plate reinforcing bar unit 31. When the inner vertical reinforcing bar 21b of the side wall reinforcing bar unit 21 is inserted into the sleeve 62b of the connecting tool 60 attached to the fixing member 50 and the sheet metal member shown in FIG. The outer vertical reinforcing bar 21a of the side wall reinforcing bar unit 21 is passed through the through hole 50d opened in the first joint 50a of the fixing hardware 50 attached to the tip of the edge reinforcing bar 31a.

In other words, the work of building the top plate reinforcing bar unit 31 from above the side wall reinforcing bar unit 21 is the work of moving the top plate reinforcing bar unit 31 downward in the vertical direction toward the side wall reinforcing bar unit 21, and the moving direction is the side wall reinforcing bar. This corresponds to the insertion (engagement) direction of the connecting members 60 and 61 of the reinforcing bars of the unit 21 and the opening (through hole, sleeve) of the fixing hardware 50.
For this reason, as the top bar reinforcing bar unit 31 is built above the side wall reinforcing bar unit 21, the reinforcing bar of the side wall reinforcing bar unit 21 is inserted into the connection parts 60 and 61 and the opening (through hole, sleeve) of the fixing hardware 50. it can.

Next, a step of fixing the connection tools 60 and 61 and the fixing hardware 50 to the reinforcing bars of the side wall reinforcing bar unit 21 and the top plate reinforcing bar unit 31 (fixing step of the joining member) is performed (see FIG. 17).
In this process, the mortar sleeves of the connection tools 60 and 61 are filled with grout, and the connection tools 60 and 61 are fixed to the reinforcing bars of the top plate reinforcing bar unit 31 and the reinforcing bars of the side wall reinforcing bar unit 21, respectively.

As a result, the upper edge reinforcing bar 31 a of the top plate reinforcing bar unit 31 and the inner vertical reinforcing bar 21 b of the side wall reinforcing bar unit 21 are joined together by the connector 60, and the lower edge reinforcing bar 31 b of the top plate reinforcing bar unit 31 and the outer vertical bar of the side wall reinforcing bar unit 21 are vertical. The reinforcing bar 21 a is joined by the connecting tool 61.
Further, when the fixing metal member 50 which is a sheet metal member is used, the nuts 51a and 51b are screwed and tightened to the tips of the outer vertical reinforcing bar 21a and the upper edge reinforcing bar 31a protruding from the through holes 50d and 50e of the fixing metal member 50, Both ends of the fixing hardware 50 are fixed to the tip of the upper edge reinforcing bar 31a and the tip of the outer vertical reinforcing bar 21a, respectively.

Thereby, the upper edge reinforcing bar 31 a of the top plate reinforcing bar unit 31 and the outer vertical reinforcing bar 21 a of the side wall reinforcing bar unit 21 are joined by the fixing hardware 50.
Further, when the sleeve type fixing metal 50 is used, if both the sleeves 56a and 56b are mortar sleeves, both the sleeves 56a and 56b are filled with grout, and the sleeves 56a and 56b of the fixing metal 50 are connected to the upper edge reinforcing bar 31a. And the outer vertical reinforcing bar 21a.

Further, when the sleeve-type fixing hardware 50 is used, the sleeve 56b into which the end of the upper edge reinforcing bar 31a is inserted is a screw coupler, and the sleeve 56a into which the end of the outer vertical reinforcing bar 21a is inserted is a mortar sleeve. Then, the sleeve 56a is filled with grout to fix the fixing metal 50 to the outer vertical reinforcing bar 21a.
Further, the coupler 70 inserted through the lower hunch rebar 21c is moved to a portion where the upper end of the lower hunch rebar 21c and the lower end of the upper hunch rebar 31c face each other with a predetermined gap (a position that covers the opposite portion). Move and fix to both hunch rebars 21c, 31c by filling with grout or the like.

Note that the thread coupler can be fixed to the threaded bar by filling the thread coupler with grout or screwing nuts before and after the thread coupler.
After the above-described step of fixing the joining member, additional shear reinforcement reinforcing bars and power distribution reinforcing bars are assembled, and the portion where the inner vertical reinforcing bar 21b and the lower edge reinforcing bar 31b intersect is joined by the cross fixing hardware 80. .
Then, concrete is placed after the building of the reinforcing bar unit is completed.

In the precast block method, the reinforcing bars of the corner portions 40 can be joined in the same manner.
In the precast block construction method, the rebar units 21 and 31 are assembled at a factory or the like, and the concrete is placed except for the corner portions 40 of the rebar units 21 and 31, and the side wall precast 22 and the top plate precast 32 are formed. Manufacture precast segments.

  Then, after the pair of side wall precasts 22 are installed facing each other at the construction site, the corner plate 40 is opened on the upper side of the side wall precast 22, the top plate precast 32 is spanned, and the outside is projected above the side wall precast 22. The reinforcing bar 21a and the inner reinforcing bar 21b are joined to the outer reinforcing bar 31a and the inner reinforcing bar 31b projected to the side of the top plate precast 32 by the connecting members 60 and 61, the fixing hardware 50, and the like (see FIG. 18). Note that the shaded portion in FIG. 18 is a precast portion.

In such a precast block construction method, when the connecting plates 60 and 61 and the fixing hardware 50 are attached in advance to the reinforcing bars protruding to the side of the top plate precast 32, and the top plate precast 32 is installed on the upper portion of the side wall precast 22, The outer vertical reinforcing bar 21a and the inner vertical reinforcing bar 21b protruding from the upper part of the side wall precast 22 are inserted (engaged) into the connecting members 60 and 61 and the fixing hardware 50 attached to the top plate precast 32.
Next, the fittings 60 and 61 and the fixing hardware 50 are fixed to the reinforcing bars by tightening nuts or filling with grout, and the reinforcing bars of the top plate precast 32 and the reinforcing bars of the side wall precast 22 are joined at the corner 40, and thereafter Concrete is placed in the corner 40.

In addition, when assembling the side wall reinforcing bar unit (side wall precast) and the bottom plate reinforcing bar unit (bottom plate precast), the bottom plate reinforcing bar unit (bottom plate precast) to which the connecting members 60 and 61 and the fixing hardware 50 are attached in advance is built in the field. The side wall reinforcing bar unit (side wall precast) is built from above.
When the side wall reinforcing bar unit (side wall precast) is built from above, the outer rebar and the inner side reinforcing bar of the side wall reinforcing bar unit (side wall precast) are attached to the reinforcing bar of the bottom plate reinforcing bar unit (bottom plate precast), 61. It is inserted (engaged) into the sleeve and the through hole of the fixing metal 50.
After that, the connecting members 60 and 61 and the fixing hardware 50 are fixed to the reinforcing bars by tightening nuts or grout filling, etc., and the reinforcing bars of the side wall reinforcing bar unit (side wall precast) and the reinforcing bars of the bottom plate reinforcing bar unit (bottom plate precast) are at the corners. In 40, it joins with the connection tools 60 and 61, the fixing metal fitting 50, etc.

  According to the construction method (process) of the present embodiment, the insertion of the side wall reinforcing bars into the joining members such as the connecting members 60 and 61 and the fixing hardware 50 which are attached to the top plate (or the bottom plate) in advance is a reinforcing bar unit or precast concrete. Since it is performed along with the construction of the member, the reinforcing bar tip assembling method or the precast block method using the reinforcing bar structure that joins the reinforcing bars using the joining members at the corner portions 40 can be easily implemented.

  Moreover, according to the construction method (process) of this embodiment, in the top plate reinforcing bar unit 31 (top plate precast 32) and the side wall reinforcing bar unit 21 (side wall precast 22), the reinforcing bars (inside the corner portion 40) ( As the reinforcing bars (outer reinforcing bars) disposed outside the corner portions 40 are straight joints, that is, straight reinforcing bars that have not been bent are used, the bending process is not necessary and the reinforcing bars are processed. The number of man-hours can be reduced and the conveyance of the reinforcing bar unit or the precast concrete member becomes easy.

In the present embodiment, the reinforcing bars (third joining members) 80 join the reinforcing bars that are inside the corner portions 40, but as shown in FIG. 19, the cross-fixing hardware (third joining member). The joining of the inner reinforcing bars by 80 can be omitted, and the reinforcing bars can be joined at the corner portions 40 by the fixing hardware (first joining member) 50 and the connecting tools (second joining members) 60 and 61.
Further, as shown in FIG. 20, the joining by the connecting tools (second joining members) 60 and 61 is omitted, and the corner portion is formed by the fixing metal fitting (first joining member) 50 and the cross fixing metal fitting (third joining member) 80. A structure in which the reinforcing bars are joined at 40 can be adopted.
Further, it is obvious that the bar arrangement structure in which the reinforcing bars are joined by the connecting devices 60 and 61, the fixing hardware 50, and the like can be applied to the bar arrangement structure of the corner portion not provided with the haunch reinforcing bar.

Moreover, the connection tools 60 and 61 are not limited to the sleeve metal fittings formed by casting, but include a plate-like portion in which a through hole through which the outer rebar is penetrated and a through hole through which the inner rebar is penetrated. A sheet metal member having a plate-like portion to be opened can be used, and the connection member made of the sheet metal can be fixed to the reinforcing bar by tightening the nut to the screw joint reinforcing bar or a combination of a bolt and a nut.
The illustrated embodiments are merely illustrative of one aspect of the present invention, and the present invention is made by those skilled in the art within the scope of the claims in addition to those directly illustrated by the described embodiments. Includes improvements and changes.

  DESCRIPTION OF SYMBOLS 10 ... Reinforced concrete structure, 20 ... Side wall, 21 ... Side wall reinforcing bar unit, 21a ... Outer vertical reinforcing bar (outer reinforcing bar), 21b ... Inner vertical reinforcing bar (inner reinforcing bar), 21c ... Lower hunch reinforcing bar, 21d ... Power distribution reinforcing bar, 21e ... Wall shear reinforcement, 22 ... Side wall precast, 30 ... Top plate, 31 ... Top plate reinforcement unit, 31a ... Upper edge reinforcement (outer reinforcement), 31b ... Lower edge reinforcement (inner reinforcement), 31c ... Upper hunch reinforcement, 31d ... distribution reinforcing bars, 31e ... shear reinforcement bars, 32 ... top plate precast, 40 ... corners, 50 ... fixing hardware (first joint member), 50d, 50e ... through holes (openings), 56a, 56b ... sleeves , 60, 61... Connector (second joining member), 62 a, 62 b .. sleeve, 70... Coupler (fourth joining member), 80.

Claims (11)

Reinforced concrete structure side wall and top slab, or bar arrangement at the corners of the side wall and bottom slab,
The side bars and the top plate, or the side bars and the bottom plate, the outer reinforcing bars arranged outside the corners and the inner reinforcing bars arranged inside the corners are linear reinforcing bars,
The outer reinforcing bars are joined together by the first joining member,
A bar arrangement structure of a reinforced concrete structure in which the outer reinforcing bar and the inner reinforcing bar are joined by a second joining member and / or the inner reinforcing bars are joined by a third joining member at an intersection.   The reinforcing structure of a reinforced concrete structure according to claim 1, wherein the second joining member joins the outer reinforcing bar and the inner reinforcing bar so that their axes are shifted from each other.   The reinforcing structure of a reinforced concrete structure according to claim 1 or 2, wherein the first joining member is a sheet metal member provided with an opening through which the outer reinforcing bar penetrates at both ends.   The reinforcing structure of a reinforced concrete structure according to claim 1 or 2, wherein the first joining member has a pair of sleeves into which the outer reinforcing bars are inserted.   The reinforcing structure of a reinforced concrete structure according to any one of claims 1 to 4, wherein the second joining member includes a sleeve through which the outer reinforcing bar penetrates and a sleeve into which a tip portion of the inner reinforcing bar is inserted. .   The reinforcement structure of the reinforced concrete structure according to claim 1 or 2, wherein at least one of the first joining member and the second joining member has a screw coupler in which an internal thread portion that is screwed into a threaded joint is formed.   The reinforcing bar structure of a reinforced concrete structure according to any one of claims 1 to 6, wherein one end portion of a reinforcing reinforcing bar is joined to the first joining member.   The reinforced concrete according to any one of claims 1 to 7, wherein the precast concrete member of the side wall and the top plate, or the precast concrete member of the side wall and the bottom plate is assembled, and a rebar is joined at the corner portion. Reinforcement structure of the structure.   8. The reinforcing bar unit according to claim 1, wherein the front reinforcing bar unit of the side wall and the top plate, or the front reinforcing bar unit of the side wall and the bottom plate are assembled and the reinforcing bar is joined at the corner portion. Reinforcement structure of reinforced concrete structure. A method for constructing a reinforced concrete structure that joins a side wall and a top plate, or a side wall and a bottom plate,
The side wall and the top plate, or the side wall and the bottom plate, the outer reinforcing bar arranged outside the corner portion and the inner reinforcing bar arranged inside the corner portion are linear reinforcing bars, Assembling the top plate reinforcing bar unit, or the side wall reinforcing bar unit and the bottom plate reinforcing bar unit;
Attaching a first joining member for joining the outer reinforcing bars to the outer reinforcing bars of the top reinforcing bar unit or the bottom reinforcing bar unit;
Attaching a second joining member for joining the outer reinforcing bar and the inner reinforcing bar to the outer reinforcing bar and the inner reinforcing bar of the top reinforcing bar unit or the bottom reinforcing bar unit;
Assembling the side wall reinforcing bar unit and the top slab reinforcing bar unit, or the side wall reinforcing bar unit and the bottom slab reinforcing bar unit, the first joining member and the second joining member attached to the top slab reinforcing bar unit or the bottom slab reinforcing bar unit And engaging the outer reinforcing bar and the inner reinforcing bar of the side wall reinforcing bar unit,
Fixing the first joining member and the second joining member;
Construction method of reinforced concrete structure including A method for constructing a reinforced concrete structure that joins a side wall and a top plate, or a side wall and a bottom plate,
The side wall and the top plate, or the side wall and the bottom plate, the outer reinforcing bar arranged outside the corner portion and the inner reinforcing bar arranged inside the corner portion are linear reinforcing bars, Assembling the top plate reinforcing bar unit, or the side wall reinforcing bar unit and the bottom plate reinforcing bar unit;
The side wall rebar unit and the top slab reinforcing bar unit, or the side wall reinforcing bar unit and the bottom slab reinforcing bar unit, concrete is placed except for the corner portion, and the side wall precast and top plate precast, or the side wall made of precast concrete. Producing precast and bottom plate precast;
Attaching a first joining member for joining the outer reinforcing bars to the outer reinforcing bars protruding from the top plate precast or the bottom plate precast;
Attaching a second joining member for joining the outer reinforcing bar and the inner reinforcing bar to the outer reinforcing bar and the inner reinforcing bar protruding from the top plate precast or the bottom plate precast;
Assembling the side wall precast and the top plate rebar precast, or the side wall precast and the bottom plate precast, and attaching the side wall precast to the first plate member or the second plate member attached to the top plate precast or the bottom plate precast. Engaging the outer reinforcing bar protruding from the inner reinforcing bar;
Fixing the first joining member and the second joining member;
Construction method of reinforced concrete structure including