JP3045840B2 - Column formwork for unit buildings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column form structure for a unit building suitable for constructing a high-rise unit building having a reinforced concrete structure or a steel reinforced concrete structure.

[0002]

2. Description of the Related Art Conventionally, as a unit building having a reinforced concrete structure or a steel reinforced concrete structure, there is one disclosed in Japanese Patent Publication No. 55-14217. This unit building is constructed by repeating the process of suspending and installing a reinforcing bar in the region between the side walls of the adjacently arranged building unit and then placing concrete in the region between the side walls over each floor.

[0003]

However, in the prior art, it is necessary to arrange concrete walls effectively in terms of structural strength, which is a constraint on the plan of the internal space of the building.

When building a unit building having a reinforced concrete structure or a steel reinforced concrete structure, concrete columns or concrete beams are cast in the column-to-column or beam-to-beam region of an adjacent building unit in order to increase the degree of freedom in planning the interior space of the building. However, it is conceivable that the concrete columns and the concrete beams secure the structural strength.

At this time, it is conceivable to install a formwork in a plurality of column gaps around the intercolumn area in order to form a discard form for placing concrete in the area between columns of adjacent building units. .

[0006] However, the lateral pressure W applied to the formwork at the time of placing a concrete column is, for example, a casting height of 3.7 m and a casting speed of 3.7 m.
At 10 m / h or less, W = 6.77 t / m ² , and reinforcement for this lateral pressure is required. However, the general formwork reinforcement method is
It is as if the outer periphery of the mold is surrounded and held by the clamp means, and has the following problems.

[0007] It is necessary to secure an installation space for the clamp means around the column, which restricts the construction procedure. The number of man-hours for construction on site increases, the production range of the factory decreases, and productivity is impaired.

The present invention improves the workability of a column formwork and improves productivity when constructing a unit building having a reinforcing bar or a steel reinforced concrete structure by placing concrete columns in the inter-pillar region of an adjacent building unit. The purpose is to do.

[0009]

The present invention according to claim 1 is constructed by arranging horizontally and vertically a building unit composed of a box-shaped frame in which a column, a floor beam and a ceiling beam are joined. A formwork is installed in a plurality of column gaps around a column space of an adjacent building unit, and the formwork forms a discarded formwork for placing concrete in the column space. In a formwork structure, a plurality of forms around the inter-pillar region,
These are connected to each other by a joining material.

[0010] According to a second aspect of the present invention, in the first aspect of the present invention, the joint material constitutes a pillar arrangement.

[0011]

According to the present invention, the following effects are obtained. One in which a plurality of molds are connected by a joining material is formed as an integral part. The lateral pressure applied to the formwork during the placement of concrete columns is supported by the tensile strength of the joint.

Since only the above-described integrated formwork is set in the inter-pillar area, no reinforcement of the formwork on site is required, and there is no need to secure a space for reinforcement around the columns. There is no restriction on the construction procedure and the workability is good.

[0013] Reinforcement of the formwork can be produced at the factory, and productivity can be improved. By using the pillar arrangement as a joining material for connecting a plurality of formwork, the formwork and the column arrangement can be joined at a factory. Therefore, compared with the case where the column reinforcement is set in a narrow space in the column form, the column reinforcement is set securely and easily at a predetermined position in the form, and a predetermined arrangement around the column reinforcement is provided. The cover thickness can be secured stably, and workability and productivity can be improved.

Therefore, according to the present invention, when building a high-rise unit building, the quality can be improved and the construction period and construction cost can be greatly reduced by each of the above.

[0015]

FIG. 1 is a schematic view showing a construction procedure of a high-rise unit building, FIG. 2 is a schematic view showing an inner unit, FIG. 3 is a schematic view showing an outer unit, FIG. 4 is a schematic view showing a column unit, FIG. Is a schematic diagram showing a girder unit, FIG. 6 is a schematic diagram showing a beam-column joint unit, and FIG. 7 is a plan view showing a unit arrangement state of a high-rise unit building.

The unit building 10 is shown in FIGS. 1 (A) to 1 (E).
As shown in the above, on the foundation, as multiple building units,
The inner unit 11 that forms the interior space of the building and the outer unit 12 that forms the outer periphery of the building are arranged adjacently in the horizontal and vertical directions. And the unit building 10
As described in detail later, the adjacent inner unit 1
1. A column unit 13 arranged in a region between columns of the outer unit 12, a girder unit 14 arranged in a region between beams, a column unit 13 and a girder unit 14.
The concrete is cast into each of the beam-column joint units 15 arranged in the intersection area of the cross section, thereby forming an RC frame having the concrete columns 13A and the concrete columns 14A.

The inner unit 11 is shown in FIGS.
As shown in (E), four steel plate columns 21 and four steel plate floor beams 2 joined to the lower ends of the columns 21 by bolts 22.
3 and 4 joined to the upper end of the column 21 by bolts 24
This is a box-shaped frame body including the steel plate ceiling beam 25. The inner unit 11 is provided with a floor slab 26, a floor base 27, a ceiling joist 28, a ceiling board 29, and an interior such as water supply / drainage, light / heat wiring, and piping / communication facilities, and is then carried into a construction site. Installed.

The outer unit 12 is, as shown in FIG.
It is a skeleton body including a steel plate column 31 and a steel plate beam 32. After an exterior such as an outer wall 33 and an opening 34 is provided at a factory, the frame is carried into a building site and installed.

Here, the columns 21 and 31 of the inner unit 11 and the outer unit 12 are formed of L-shaped cross-section members that are concave with respect to the inter-column region. In addition, both ends of the L-shaped cross section of the columns 21 and 31 are provided with a bending engagement portion 21A that can engage with a both-end bending engagement portion 43A of the auxiliary mold 43 of the column unit 13 described later.

The column unit 13 is shown in FIG.
As shown in (B), a steel pipe 41 penetrating through the center of the cross section is provided, and a column reinforcement 42 capable of placing concrete is provided around the pipe 41. Also,
The column unit 13 includes an adjacent inner unit 11,
An auxiliary formwork 43 made of steel plate is provided around a column space of the outer unit 12 at a plurality of column gaps, and the opposing auxiliary formwork 43 is connected to each other by a connecting line 44. In addition, the joint bar 44 is welded to a reinforcing bar 45 made of a steel bar that is welded to each auxiliary form 43.

Here, the column reinforcement 42 of the column unit 13 is provided.
Are main reinforcements 46 extending in the longitudinal direction of the column, reinforcing reinforcements 47 disposed so as to surround the respective main reinforcements 46,
And 4. In addition, the auxiliary mold 43 is provided with a bending engagement portion 43A at both ends, and can be engaged with the bending engagement portions 21A of the columns 21 and 31.

That is, in the unit building 10, the pillars 2 of the adjacent inner unit 11 and outer unit 12
1, 31 and the auxiliary formwork 43 installed in the gap between the columns constitute a discarded formwork for placing the concrete column 13A into the column unit 13.

The girder unit 14 is shown in FIG.
As shown in (B), a beam arrangement 51 capable of placing concrete is provided. Further, the girder unit 14 is provided with auxiliary steel molds 52 and 53 installed in a plurality of beam gaps around a region between beams of the adjacent inner unit 11 and outer unit 12, and auxiliary molds on opposite side surfaces. 5
2 and 52 are connected to each other by a communication pipe 54, and an auxiliary form 53 on the bottom surface is supported by a joint 55 of the beam arrangement 51. The auxiliary formwork 52 is the floor beam 2 of the upper floor inner unit 11.
The auxiliary formwork 53 is installed in the beam gap between the ceiling beams 25 of the left and right inner units 11. In addition, the line pipe 5
4. The joint 55 is welded to each of the auxiliary formwork 52, 53.

The beam arrangement 5 of the girder unit 14
1 is a main beam 56 extending in the longitudinal direction of the beam;
, And the above-described connecting bar 55. In addition, the auxiliary mold 52 has a bent portion 52A mounted on the ceiling beam 25 of the lower floor inner unit 11 at the lower end, and a bent portion 52B for supporting the floor beam 23 of the upper floor inner unit 11 at the upper end. In addition, auxiliary formwork 5
Numeral 3 is provided with a bending engagement portion 53A at both ends, so that it can be engaged with the bending engagement portion 25A of the ceiling beam 25.

That is, in the unit building 10, the floor beams 2 of the adjacent inner unit 11 and outer unit 12
3. The ceiling beam 25, the beam 32, and the auxiliary formwork 52, 53 installed in the gap between the beams constitute a discarded formwork for placing the concrete beam 14A on the girder unit 14. .

The beam-column joining unit 15 is shown in FIG.
As shown in (B), a steel pipe intermediate pipe 61 penetrating the center of the cross section is provided, and a column reinforcement 62 and a beam reinforcement 63 capable of placing concrete are provided.

Here, the column reinforcement 6 of the beam-column joint unit 15 is provided.
2 is a column main reinforcement 64 extending in the column longitudinal direction;
And reinforcing bars 65 arranged so as to surround the The beam reinforcement 63 of the beam-column joint unit 15 is composed of a beam reinforcement 66 extending in the longitudinal direction of the beam, and a reinforcement 67 disposed so as to surround each beam reinforcement 66.

The upper and lower inner units 11,
When the column unit 13 of the outer unit 12 is joined by the beam / column joint unit 15, the pipes 41 of the column units 13 on the upper and lower floors are mutually connected via the pipe 61 of the beam / column joint unit 15 as shown in FIG. I can communicate. At this time, the upper ends of the pipes 41 and 61 are straight, whereas the lower ends thereof are
As described later, the pipe 41 is hardly adhered and remains on the concrete that is pumped through the pipes 41 and 61,
In addition to the straight shape at the upper end of the pipe 61, the lower end of the pipe 41, 61 is easily fitted to the upper end of the pipe 41, 61 on the lower floor side.

Hereinafter, a method of constructing the unit building 10 will be described. (1) A plurality of inner units 11 and outer units 12 are suspended on a foundation, and an inner unit 1 constituting one layer
1. The outer unit 12 is disposed adjacent to the horizontal direction (see FIGS. 1A and 7).

(2) The column unit 13 is arranged so as to be inserted into the region between the columns of the L-shaped cross-section members of the inner unit 11 and the outer unit 12 which are arranged adjacent to each other (see FIG. 1B). ).

(3) The ceiling beam 2 of the inner unit 11 and the outer unit 12 with the girder unit 14 disposed adjacent to the girder unit 14
5 and 32 are arranged in the region between the beams (see FIG. 1C).

(4) The beam-column joint unit 15 is arranged at the intersection area between the column unit 13 and the girder unit 14.
At this time, the lower end receiving portion 68 of the pipe 61 of the beam-column joint unit 15 is fitted to the upper end straight portion of the pipe 41 of the column unit 13. Further, the column main reinforcement 46 of the column unit 13 and the column main reinforcement 64 of the beam-column joint unit 15 are welded,
Joined with a special joint, beam main reinforcement 5 of girder unit 14
6 and the beam main reinforcement 66 of the beam-column joint unit 15 are welded and joined by a special joint.

(5) Inner unit 1 constituting upper layer
1. The outer unit 12 is disposed adjacent to the upper part of the inner unit 11 and the outer unit 12 which are the lower layers of the above (1).

(6) The inner units 11, which are arranged adjacent to each other,
Pillars 21 and 31 of outer unit 12 and lower ceiling beam 2
5, 32 and the upper floor beams 23, 32 are discarded frames, and the auxiliary frames 43, 52, 53 provided in the column unit 13 and the girder unit 14 are discarded frames, and a column unit for one layer is provided. Concrete is cast into the girder unit 13 and the girder unit 14 to form concrete columns 13A and concrete beams 14A. At this time, the pipes 41 of the column units 13 on the upper and lower floors are connected to the column-beam joining unit 15 described in (4) above.
Are communicated with each other through a pipe 61 of the lower column unit 13.
Filled from the lower part, it is cast around the pipe 41 of the column unit 13 which is the casting floor, the girder unit 14 and the beam-column joint unit 15 (see FIG. 1 (D)).

A duct 69 is connected to the line pipe 54 provided in the girder unit 14 before or after the concrete casting (6) (see FIG. 1E).

(7) The above (1) to (6) are repeated for each floor of the unit building 10. In the unit building 10, the adjacent inner unit 11, outer unit 1
It is not necessary to dispose the column units 13 in all the inter-pillar regions of No. 2 and the column units 13 may not be disposed in some of the inter-pillar regions (the regions between the pillars 21 indicated by broken lines in FIG. 7). . In that case, after the concrete placement of each floor is completed, at the stage where the structural strength of each level is secured,
By removing the column 21 of the column unit 13, a large living room space or the like can be obtained. In addition, the column 21 can be removed by removing the bolts 22 and 24 from the joint with the floor beam 23 and the ceiling beam 25.

In the unit building 10, it is not essential to cast concrete one layer at a time, and the column units 13 and the girder units 14 of a plurality of layers (or all layers) may be provided. Alternatively, concrete may be cast at once.

Next, the operation of this embodiment will be described. A plurality of auxiliary molds 43 connected by connecting bars 44 are formed as an integral part. Lateral pressure applied to the auxiliary formwork 43 when the concrete column is cast is supported by the tensile strength of the joint 44.

Only by setting the column unit 13 constituting the above-mentioned integrated formwork in the space between the columns, it is not necessary to reinforce the auxiliary formwork 43 on site, and the column 21
Since there is no need to secure a space for reinforcement around the building, there is no restriction on the construction procedure, and the workability is good.

The reinforcement of the auxiliary mold 43 can be produced in a factory, and the productivity can be improved. By using the column reinforcements 42 as the connecting bars 44 connecting the plurality of auxiliary formwork 43, the auxiliary formwork 43 and the column arrangement 4
2 can be joined at the factory. Therefore, as compared with the case where the column reinforcement 42 is set in a narrow space in the column form, the column reinforcement 42 is reliably and easily set at a predetermined position in the auxiliary form 43, and the column reinforcement is provided. A predetermined cover thickness around 42 can be ensured stably, and workability and productivity can be improved.

Therefore, according to the present invention, according to each of the above, when constructing the high-rise unit building 10, the quality can be improved and the construction period and construction cost can be greatly reduced.

In the practice of the present invention, the unit building 10 does not necessarily require the use of the beam-column joint unit 15. When the beam-column joint unit 15 is not used, FIG.
As shown in (D), in the column arrangement 42 of the column unit 13, there is provided a column main bar 71 joined to the column main bar 46 of the column unit 13 intersecting with each other, and the beam main bar 56 of the girder unit 14 intersecting with each other. Beam main bar 72 to be joined
Will be provided.

[0043]

As described above, according to the present invention, concrete columns are cast in the inter-pillar region of an adjacent building unit to construct a unit building having a reinforced concrete structure or a steel reinforced concrete structure. And the productivity can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a construction procedure of a high-rise unit building.

FIG. 2 is a schematic diagram showing an inner unit.

FIG. 3 is a schematic view showing an outer unit.

FIG. 4 is a schematic view showing a column unit.

FIG. 5 is a schematic view showing a girder unit.

FIG. 6 is a schematic view showing a beam-column joint unit.

FIG. 7 is a plan view showing a unit arrangement state of a high-rise unit building.

[Explanation of symbols]

 10 Unit Building 11 Inner Unit (Building Unit) 12 Outer Unit (Building Unit) 21, 31 Column 23 Floor Beam 25 Ceiling Beam 32 Beam 42 Pillar Arrangement 43 Auxiliary Formwork (Formwork) 44 Joint Bar (Splice)

Claims (2)

(57) [Claims] 1. A building unit comprising a box-shaped frame unit in which a column, a floor beam and a ceiling beam are joined to each other, which is constructed by arranging horizontally and vertically adjacent to each other. A formwork is installed in a column gap, and the formwork is a column formwork structure for a unit building, which forms a discarded formwork for placing concrete in the inter-column area, and a plurality of forms around the inter-column area. Column formwork for unit buildings, where the formwork is connected to each other with joints. 2. The column formwork structure for a unit building according to claim 1, wherein the joint member forms a column reinforcing bar.