JP2002061289A - Jointing method for concrete column and beam - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jointing method for a concrete column and a beam, dispensing with the fine adjustment of the positions of the beam and the concrete placing form of the concrete column when the concrete column and the beam are joined together and enabling the prevention of displacements of the beam and the above form during the placing of concrete. SOLUTION: The jointing method is characterized as follows: the beam 2 is provided with a guide member 16 having an inclined face 17 capable of abutting on the inner edge C of the concrete placing form 10 of the concrete column when the inner edge C is exposed and the form 10 and the beam 2 are vertically disposed at fixed intervals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for joining a concrete column and a beam.

[0002]

2. Description of the Related Art For example, when constructing a reinforced concrete building, an outer shell precast is sometimes used to shorten the construction period. In this shell precast, the formwork for concrete casting is used as the shell, and is left as it is even after the building is completed.

Conventionally, when joining a concrete column and a beam using such an outer shell precast, first, after assembling the column main reinforcing bar, a connecting plate or the like for connecting the beam is provided between the column main reinforcing bars. Deploy. Next, after assembling the outer shell precast around the column main bar, the beam is lifted above the outer shell precast by a lifting crane, and the lifting crane and the operator cooperate with each other to fine-tune the position of the beam. And the beam was fixed to the joining plate with bolts or the like.

In addition, when the concrete is poured after the beam is joined to the joining plate, the beam and the outer shell precast are supported to prevent the beam and the outer shell precast from being displaced by the weight of the concrete. It was tightly connected to the skeleton with wires. The same was done when the concrete pillars were not used without shell precast.

[0005]

Conventionally, however, it is necessary to fine-tune the position of the beam with the cooperation of a crane and a worker, regardless of whether a shell precast manufactured at a factory or the like is used or not. Yes, and
There is a problem that the work time is long because the worker has to perform fine work in a narrow space.

In some cases, the beam and the outer shell precast cannot be firmly connected to the skeleton by a support wire due to a space problem or the like. In this case, the beam or outer shell precast shifts during concrete casting. There was a fear.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a problem, and there is no need to finely adjust the position of a concrete casting form or beam placed on the upper side. Provided is a method of joining a concrete column and a beam that can prevent displacement of the beam and the concrete casting formwork without firmly connecting the beam and the concrete casting formwork to a skeleton with a support wire or the like at the time of concrete placing. It is in.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a method for joining a concrete column and a beam, and is configured as follows to solve the above-mentioned technical problem. That is, the method for joining a concrete column and a beam according to the present invention, when joining the end of the concrete column and the end of the beam, exposes the inner edge of the concrete casting formwork of the concrete column, A guide member having an inclined surface capable of contacting an inner edge of the concrete casting form when the concrete casting form and the beam are arranged at a constant interval in the vertical direction is provided on the beam. After arranging one of the concrete placing formwork and the beam, which is disposed on the lower side, at a predetermined position, and arranging the other on the upper side, the inclined surface of the guide member and the inner edge of the concrete column And by lowering the beam or the concrete casting formwork disposed on the upper side, the dropped beam or the concrete casting formwork is inclined with the inclined surface of the guide member. The concrete hammering The inner edge of the use formwork is moved obliquely downward as a guide, characterized in that it is arranged at a predetermined joining position.

According to this method of joining a concrete column and a beam, one of the concrete formwork or the beam is placed at a predetermined position, and the other is lifted above the concrete form or the beam, and the guide member provided on the beam is provided. The lower edge of the concrete casting formwork by lowering the upper surface of the beam or concrete casting formwork by simply bringing the inclined surface of the above into contact with the inner edge of the concrete casting formwork. Since the crane and the worker are arranged at the predetermined joint positions, it is not necessary for the lifting crane and the operator to finely adjust the position of the beam or the concrete casting formwork.

After the concrete casting form and the beam are arranged at the predetermined joining positions, the guide member is substantially in contact with the inner surface of the concrete casting form, and acts as a stopper. When placing concrete, it is possible to prevent the upper beam or the concrete placing form from being displaced in the lateral direction due to the weight of the concrete.

Next, each component will be described. (Concrete column) The concrete column to which the present invention is applied may be a concrete column having a form for concrete casting when it is joined to a beam at the construction site. Examples thereof include a reinforced concrete column and a steel-framed reinforced concrete column. Can be illustrated. Further, concrete columns using outer shell precast columns manufactured in advance in a completed state can be exemplified. (Concrete Casting Form) In addition to ordinary wooden formwork, iron formwork, and steel formwork, the outer shell of an outer shell precast column can be exemplified. Since a beam is placed on these concrete casting molds, it is necessary to have sufficient strength to support the weight of the beam. (Guide member) The guide member may be any member that forms an inclined surface with respect to the upper or lower surface of the beam. For example, a triangular plate or a flange portion of a channel is cut obliquely to provide an inclined surface. And the like. When a steel beam is used, this guide member can be attached to the steel frame by welding.When a reinforced concrete beam is used, an auxiliary member is fixed to the reinforcing bar and attached to this auxiliary member. Can be.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for joining a concrete column and a beam according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a view for explaining a method of joining a concrete column and a beam according to the present invention. The figure also shows a state immediately after the outer shell precast of the concrete column and the beam have been arranged at the joint position and before the concrete is cast.

Here, a plurality of pillar bars 1 of the concrete pillar are arranged at appropriate intervals, and these pillar bars 1,
The upper and lower outer shell precasts 10 and 10 are arranged around 1. Further, the steel beams 2, 2 are arranged between the upper and lower outer shell precasts 10, 10.

As shown in FIG. 2, a plurality of pillar main bars 1 are arranged at four corners of the pillar. In addition, a joining plate 3 for joining the beam 2 is disposed substantially at the center of the column main bar 1,
It is held by an appropriate holding member (not shown).
This joint plate 3 has a plurality of bolt holes 3a (FIG. 4).
Is provided.

The outer shell precast 10 is manufactured in advance in a factory or the like, and includes an outer shell 11 used as a formwork for placing concrete, and a hoop streak 12 provided on the inner peripheral surface of the outer shell 11. And The outer shell 11 is formed of, for example, a metal or the like, and remains as a part of a pillar even after the building is completed. A predetermined gap is provided between the outer shell 11 and the reinforcing bar 1. Here, a chamfer C of an appropriate size is applied to the inner edge on the lower side of the outer shell 11. The chamfer C is used for a guide member 16 to be described later.
Abuts on the inclined surface 17 of the slab.

As described above, by using the outer shell precast 10, the labor for assembling the formwork on site can be omitted, and since the outer shell precast 10 is lightweight, transportation and handling are facilitated.

The steel beam 2 is made of H-shaped steel. A fixing plate 15 for fixing to the joining plate 3 of the outer shell precast 10 is provided at an end of the steel beam 2 on the joining side. The fixing plate 15 is rectangular, and both ends protrude from the upper and lower surfaces of the steel beam 2.

As shown in FIGS. 2 and 3, two fixing plates 15 are provided at predetermined intervals in a notch 2a provided at the end of the steel beam 2. The joining plate 3 is inserted between the fixing plates 15. As shown in FIG. 3, the fixing plate 15 is provided with a bolt hole 15a that matches the bolt hole 3a (FIG. 4) of the joining plate 3.

As shown in FIG. 1, triangular guide members 16 are provided on the upper and lower surfaces of the steel beam 2. The guide member 16 is arranged inside the outer shell 11 of the outer shell precast 10 when the steel beam 2 is arranged at a predetermined joint position, and furthermore, the root portion of the inclined surface 17 substantially contacts the outer shell 11. It is arranged in the position where it does.

In the present embodiment, the chamfer C is provided on the inner edge of the outer shell 11 of the outer shell precast 10 as described above, and the chamfer C is in contact with the inclined surface 17 of the guide member 16. As shown in FIG. 3, the guide member 16 has a relatively large width B, and is disposed substantially on the center line of the steel beam 2.

Next, a procedure for joining the outer shell precasts 10 and 10 to the steel beam 2 will be described. Here, first, as shown in FIG. 4, the column main reinforcement 1 and the joining plate 3 are erected. Next, one steel beam 2 is lifted in a proper posture using a lifting crane (not shown) or the like, and is disposed slightly above a predetermined joint position. Then, the inclined surface 17 of the lower guide member 16 of the steel beam 2 is brought into contact with the chamfer C of the outer shell 11 of the outer shell precast 10.

Next, the steel beam 2 is lowered while keeping its posture. Then, as shown in FIG.
While the inclined surface 17 of the outer shell 11 is in contact with the chamfer C of the outer shell 11, the steel beam 2 moves diagonally to the lower right using the inclined surface 17 and the chamfer C as a guide. Then, as shown in FIG. 6, when the lower surface of the steel beam 2 abuts on the upper end surface of the outer shell 11, that is,
The steel beam 2 stops at a predetermined joint position.

Similarly, as shown in FIG. 7, the steel beam 2 on the right side is also arranged at a predetermined joint position. Then, the fixing plates 15, 15 of the steel beams 2, 2 on both sides and the joining plate 3 are fixed with bolts 18.

Next, as shown in FIG. 8, the upper shell precast 10 is lifted in a proper posture by a lifting crane, placed above the steel beams 2 and 2, and Chamfer C to inclined surface 1 of guide member 16 of steel beam 2
7

When the outer shell precast 10 is lowered in the posture as it is, the inclined surface 17 of the guide member 16 and the chamfer C of the outer shell 11 serve as guides, and the outer shell precast 10 moves obliquely downward. As shown in FIG. 1, the outer shell 11 stops when it comes into contact with the upper surface of the steel beam 2. This stopped position is the joining position of the outer shell precast 10.

Similarly, after the appropriate number of outer shell precasts 10 and the steel beams 2 are arranged at the joint positions, as shown in FIG.
8 is cast.

At this time, the lateral force F due to the weight of the cast concrete 18 acts on the steel beams 2 and 2 and the upper outer shell precast 10.
0, a guide member 16 disposed inside the outer shell 11;
The stopper 16 prevents the steel beams 2, 2 and the outer shell precast 10 from laterally shifting.

As described above, according to the present invention, the steel beam 2 or the outer shell precast 10 arranged on the upper side is lifted by the lifting crane, and the inclined surface 17 of the guide member 16 provided on the steel beam 2 is removed. Chamfer C of outer shell 11 of precast 10
And the upper steel beam 2 or outer shell precast 1
Since it can be arranged at a predetermined joint position only by lowering 0, it is not necessary to finely adjust the position of the upper steel beam 2 or the outer shell precast 10 by the lifting crane and the operator as in the related art. Therefore, the working time can be greatly reduced.

The guide member 16 provided on the upper surface or the lower surface of the steel beam 2 is connected to the outer shell 11 of the outer shell precast 10.
Shell precast 10 and steel beam 2
Acts as a stopper for preventing relative lateral displacement, so that when the concrete 18 is cast between the outer shell precast 10 and the steel beam 2, the outer shell precast 10 and the steel beam 2 are laterally displaced. Can be prevented.

In the above-described embodiment, the case where the outer shell precast 10 is used for the concrete column has been described.
It is sufficient that the concrete casting formwork is present, and thereafter, the present invention can be applied to either the case where the concrete casting formwork is left as a part of the pillar or the case where it is removed.

For example, as shown in FIG. 10, when the outer shell precast 20 made of steel reinforced concrete is used, or as shown in FIGS. 11 and 12, when the outer shell precasts 21 and 22 are used. As shown in FIG. 13, the present invention can be applied to a case where the formwork 23 is assembled at a construction site.

That is, the outer shell precast 20 shown in FIG.
Has a square outer shell 24, concrete 25 cast in the outer shell 24, a reinforcing bar 26 arranged along the inner periphery of the outer shell 24, and a steel pipe-made steel frame 27 arranged at the center. are doing. The outer shell 24 is used as a mold of the present invention.

An outer shell precast 21 shown in FIG. 11 includes an outer shell 28 similar to the above-described outer shell precast 10 and an outer shell 2.
8 has a concrete 29 and a hoop streak 30 which are cast by a constant thickness along the inner circumference. After joining the beams, concrete (not shown) is poured into the interior space of the concrete 29.

The outer shell precast 22 shown in FIG.
1 and a hoop bar 32 arranged along the inner peripheral surface thereof. After joining the beams, concrete is poured into the internal space.

The formwork 23 shown in FIG. 13 is assembled on site as described above. In the case of a reinforced concrete column, before assembling the formwork 23, the column main reinforcement 33 is erected and a hoop is provided around the main reinforcement 33. The streaks 34 are attached. This formwork 23
Needs to be strong enough to support the weight of the beam, and may be made of wood, iron or steel, for example.

In the above-described embodiment, the guide member 16 having a relatively large width B (FIG. 3) is used on the upper and lower surfaces of the steel beam 2, but as shown in FIG. 3
5, the inclined surface 3 of the guide member 35 is used.
By providing a wide support plate 37 on the side opposite to 6,
The guide member 35 can be stably held.

In FIG. 14, one guide member 35 is used. However, as shown in FIG. 15, two guide members 38, 38 having a small width B can be used. In this case, the guide members 38, 38 are arranged at an appropriate interval from each other, and the opposite sides of the inclined surfaces 39, 39 are connected by a support plate 40. Thereby, stability is improved.

In FIGS. 14 and 15, the guide members 35 and 38 and the support plates 37 and 40 are separate members, but as shown in FIG. 16, the guide member 41 and the support plate 42 are integrated. You can also. In this case, for example, a channel 43 having an appropriate length is prepared, and both flanges 44 of the channel 43 are cut along oblique cutting lines 45, 45, so that the inclined surfaces 46, 46 of the guide member 41 are opposed to each other. The sides are connected by a support plate 42 integral with the guide member 41.

In the above embodiment, the steel beam 2 is used and the guide member 16 is fixed to the steel frame. However, when a reinforced concrete beam is used, for example, an auxiliary member is attached to a reinforcing bar, and the auxiliary member is attached to the reinforcing member. The guide member can be fixed. Further, in the above-described embodiment, the case where two steel beams 2 are joined has been described.
The present invention can be applied to a case where three or four beams are joined.

[0041]

As described above, according to the present invention,
After placing the concrete casting form or beam at a predetermined position, the beam or concrete placing form is lifted above the concrete placing form or beam, and the inclined surface of the guide member provided on the beam and the concrete placing form In a state where the edge is in contact with the edge, the upper beam or the concrete casting formwork is simply lowered to be placed at a predetermined joining position. Therefore, it is not necessary for the lifting crane and the operator to finely adjust the position of the beam or the concrete casting formwork as in the related art, so that the operation time can be greatly reduced.

After the concrete casting form and the beam are arranged at the predetermined joining positions, the guide member is substantially in contact with the inner surface of the concrete casting form. In this case, the guide member acts as a stopper, and it is possible to prevent the concrete placing form or beam from being displaced in the lateral direction due to the weight of the concrete. Therefore, an assembly error between the concrete casting formwork and the beam can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a method for joining a concrete column and a beam according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a perspective view showing a guide member and a fixing plate according to the present invention.

FIG. 4 is a diagram illustrating a construction procedure of a method for joining a concrete column and a beam according to the present invention.

FIG. 5 is a view for explaining the operation of the guide member according to the present invention.

FIG. 6 is a diagram illustrating a construction procedure of a method for joining a concrete column and a beam according to the present invention.

FIG. 7 is a diagram for explaining a construction procedure of a method for joining a concrete column and a beam according to the present invention.

FIG. 8 is a diagram illustrating a construction procedure of a method for joining a concrete column and a beam according to the present invention.

FIG. 9 is a diagram illustrating the operation of the guide member according to the present invention.

FIG. 10 is a sectional view showing an outer shell precast to which the method for joining a concrete column and a beam according to the present invention can be applied.

FIG. 11 is a sectional view showing an outer shell precast to which the method for joining a concrete column and a beam according to the present invention can be applied.

FIG. 12 is a cross-sectional view showing an outer shell precast to which the method for joining a concrete column and a beam according to the present invention can be applied.

FIG. 13 is a cross-sectional view showing a mold to which the method for joining a concrete column and a beam according to the present invention can be applied.

FIG. 14 is a view showing another embodiment of the guide member according to the present invention.

FIG. 15 is a view showing another embodiment of the guide member according to the present invention.

FIG. 16 is a view showing another embodiment of the guide member according to the present invention.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 pillar main bar 2 steel beam 10 outer shell precast 11, 24, 28, 31 outer shell (concrete casting formwork) 11 a inner edge 16, 35, 38, 41 guide member 17, 36, 39, 46 inclined surface 23 Concrete casting formwork

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Terutake Imamura 2-10-26 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd. (72) Inventor Kiyoshi Okamura 2-26, Fujimi 2-chome, Chiyoda-ku, Tokyo Construction Industry Co., Ltd. (72) Inventor Naohiro Yoshida 2-10-26 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd. (72) Inventor Keizo Higashima 2-10-26, Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry F term (for reference) 2E125 AA03 AA13 AB01 AB12 AC04 AC15 AG03 AG04 AG12 AG41 AG57 BA03 BB02 BB22 BB36 BB37 BC09 BD01 BE07 BE08 BF04 BF08 CA05 CA14 CA83 CA90 EA33

Claims (3)

[Claims] When joining an end of a concrete pillar and an end of a beam, an inner edge of a concrete casting form of the concrete column is exposed, and the concrete casting form and the beam are joined together. A guide member having an inclined surface capable of contacting an inner edge of the concrete casting formwork is provided on the beam when the concrete placing formwork is arranged at a constant interval in the vertical direction, and the concrete casting formwork and the After arranging one of the beams arranged on the lower side at a predetermined position, arranging the other on the upper side and bringing the inclined surface of the guide member into contact with the inner edge of the concrete column, and arranging on the upper side By lowering the beam or the concrete casting formwork that has been dropped, the lowered beam or the concrete casting formwork is inclined with the inclined surface of the guide member and the inner end of the concrete casting formwork. Diagonally below using the edge as a guide Moved, method of joining the concrete column and beam, characterized in that is arranged at a predetermined joining position. 2. The method according to claim 1, wherein an outer shell of an outer shell precast is used as the concrete casting formwork. 3. The method according to claim 1, wherein the concrete casting formwork is a formwork assembled at a concrete column construction site.