JP3045837B2 - Unit building and its construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[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.

[0005] However, when a concrete column is simply cast in a region between columns of adjacent building units, there are the following problems.

[0006] Concrete is filled and poured from the opening at the upper end of the inter-pillar area of the adjacent building unit. However, as the height of the building increases, the concrete pumping line is extended to a higher place. Poor workability.

As the self-weight of a concrete column becomes higher, it becomes heavier, and it is necessary to provide a large amount of reinforcing bars sufficient to withstand excessive axial stress and shear stress applied to the column. Becomes

[0008] In the case where concrete is poured into a column-to-column area or a beam-to-beam area of an adjacent building unit, after the concrete is hardened, it takes a certain number of days to install the upper floor unit. For this reason, the rainwater during the construction period stays on the cast concrete, causing the worker to be liable to slip, thereby deteriorating the workability.

[0009] Since rain gutters cannot be vertically arranged in the interior space of the building, after construction is completed, rain gutters for draining rainwater from the roof are provided on the outer periphery of the building.
The drainage path from the center of the roof to the rain gutter is long, making it difficult to improve drainage.

According to the present invention, a concrete column is cast in an inter-column region of an adjacent building unit, and when constructing a unit building having a reinforced concrete structure or a steel reinforced concrete structure, the workability of concrete pumping is improved and the weight of the concrete column is reduced. And to improve the drainage of rainwater.

[0011]

The present invention according to claim 1 is constructed by arranging horizontally and vertically adjacent building units each composed of a box-shaped frame in which a column, a floor beam, and a ceiling beam are joined. A unit building having a pipe penetrating through the inside of the cross-section, having a column arrangement capable of placing concrete around the pipe, and having a column unit arranged in the inter-pillar region of an adjacent building unit. It is made to be constituted by.

According to a second aspect of the present invention, there is provided the method of constructing a unit building according to the first aspect, wherein the building units constituting one level are horizontally arranged adjacently, and the building units arranged adjacently are arranged. The column unit is placed in the area between the pillars, and the pipes of the column units on the upper and lower floors communicate with each other. Casting concrete around the pipes of the column units of each level.

[0013]

According to the present invention, the following effects are obtained. Concrete is filled and poured from the lower part of the pipe of the lowermost column unit. Therefore, even in high rise,
There is no need to extend the concrete pumping line to a higher place, and the workability is good.

The center of the cross section of the concrete column becomes hollow due to the presence of the pipe. As a result, the weight of the concrete column is reduced, and the axial stress and shear stress acting on the concrete column are reduced. The cavity formed by the pipe at the center of the cross section of the concrete column is located at the center of the cross section, and does not significantly impair the cross-sectional strength of the concrete column. Therefore, the amount of reinforcement for ensuring the strength of the concrete column is reduced, which is advantageous in material economy.

A pipe penetrating the center of the cross section of the concrete column can be used as a drainage channel from the poured concrete during construction. Therefore, it is possible to prevent the worker from slipping on the accumulated rainwater and to improve the workability.

The pipe penetrating the center of the cross section of the concrete column can be used as a drain for rainwater from the roof after the completion of the construction. Therefore, the drainage channel for rainwater is opened in the roof interior area, the drainage path length from the center of the rooftop to the drainage channel is short, and drainage can be improved.

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

[0018]

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 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, and FIG. 8 is a schematic view showing a roof surface of the unit building.

The unit building 10 is shown in FIGS.
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-to-column joining units 15 arranged in the intersection area of, thereby forming an RC rigid frame including the concrete columns 13A and the concrete beams 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 pillars 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-pillar 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.

Here, the beam reinforcement 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. .

FIG. 6 (A)
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 reinforcing bars 6 of the beam-column joint unit 15
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 units 13 are arranged so as to be inserted into the inter-pillar regions of the pillars 21 and 31 made of the L-shaped section material of the inner unit 11 and the outer unit 12 which are arranged adjacent to each other (see FIG. 1B). ).

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

(4) The beam-column joining unit 15 is arranged in 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) Inner units 11 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. However, in the unit building 10, the upper end opening 41A of the pipe 41 built in the column unit 13 on the top floor is opened on the roof surface (see FIG. 8).

In the unit building 10, it is not essential to dispose the column units 13 in all the columns between the inner unit 11 and the outer unit 12 adjacent to each other. (The area between the pillars 21 indicated by broken lines)
With regard to the above, the column unit 13 may not be provided. In this case, the pillars 21 of the column unit 13 can be removed at the stage where the structural strength of each floor has been ensured by the completion of concrete placement on each floor, and 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. The column unit 13 and the girder unit 14 for 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. The concrete is filled from the lower part of the pipe 41 of the lowermost column unit 13 and poured. Therefore, even in a high-rise building, there is no need to extend the concrete pressure-feeding pipeline to a higher place, and the workability is good.

The center of the cross section of the concrete column is a pipe 4
As a result, the concrete column becomes hollow, the weight of the concrete column is reduced, and the axial stress and shear stress acting on the concrete column are reduced. Since the hollow formed by the pipe 41 at the center of the cross section of the concrete column is located at the center of the cross section, the cross-sectional strength of the concrete column is not significantly impaired. Therefore, the amount of reinforcement for ensuring the strength of the concrete column is reduced, which is advantageous in material economy.

The pipe 41 penetrating through the center of the cross section of the concrete column can be used as a drainage channel from the poured concrete during construction. Therefore, it is possible to prevent the worker from slipping on the accumulated rainwater and to improve the workability.

The pipe 41 penetrating through the center of the cross section of the concrete column can be used as a drain for rainwater from the roof after the construction is completed. Therefore, the drainage channel for rainwater is opened in the roof interior area, the drainage path length from the center of the rooftop to the drainage channel is short, and drainage 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. In this case, the pipes 41 of the column units 13 on the upper and lower floors are directly connected to each other without passing through the pipes 61 of the beam-column joint unit 15.

[0048]

As described above, according to the present invention, concrete pillars are cast in the inter-pillar region of the adjacent building unit to improve the workability of concrete pumping when constructing a unit building having a reinforced concrete structure or a steel reinforced concrete structure. In addition, the weight of the concrete column can be reduced, and the drainage of rainwater 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.

FIG. 8 is a schematic diagram showing a roof surface of a unit building.

[Explanation of symbols]

 Reference Signs List 10 unit building 11 inner unit (building unit) 12 outer unit (building unit) 13 column unit 21, 31 column 23 floor beam 25 ceiling beam 32 beam 41 pipe 42 column reinforcement

Claims (2)

(57) [Claims] 1. A unit building constructed by arranging horizontally and vertically adjacent building units each having a box-shaped frame in which a column, a floor beam, and a ceiling beam are joined to each other, comprising a pipe penetrating the inside of the cross section. In addition, a unit building comprising a column arrangement capable of placing concrete around the pipe and having a column unit arranged in a region between columns of an adjacent building unit. 2. The method for constructing a unit building according to claim 1, further comprising the steps of horizontally arranging the building units constituting one level in the horizontal direction, and arranging the column units in a region between the columns of the adjacently arranged building units. The process of arranging and connecting the pipes of the column units on the upper and lower floors to each other, and the concrete filled from the bottom of the pipes of the lowermost column unit using the columns of the adjacently placed building units as discarded frames And a step of casting around a pipe.