JPH10205035A - Floor structure of precast reinforced concrete - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily cope with indoor remodeling, by dividing a PC beam into the upper and lower parts and integrally holding a PC floor plate between them and supporting the floor plate by the upper and lower beams and widening the floor span and the three-dimensional space. SOLUTION: A floor plate 1 and upper and lower beams 3, 2 made of precast reinforced concrete (PC) are fabricated in advance in a factory and assembled together with PC columns and PC walls at the construction site. The floor plate 1 is laid on the assembled lower beam 2 and integrally connected to the lower beam 2 together with the upper beam 3 by vertical bolts and nuts 5. And high strength mortar 7 is charged in the through holes (bolt hole) 4. The floor plate 1 is supported by the lower beam 2 and suspended from the upper beam. Floor finish boards 11 are laid on the upper beam 3 and the space 12 under the floor is used for a containing space or piping facilities to secure a large habitable room space and easily change partitioning or the like. In this way, a house which can cope with the change to a future life style, can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast reinforced concrete floor structure suitably used for a house requiring a large space.

[0002]

2. Description of the Related Art In recent years, along with rationalization of construction methods, labor saving, noise prevention, improvement of concrete reliability, etc.,
The durable precast reinforced concrete (hereinafter abbreviated as PC) homes are increasing. As a floor structure of a PC house conventionally proposed, a PC floor board is supported from below by a PC beam (Japanese Patent Publication No. 51-4577, Japanese Patent Application Laid-Open No. 58-91246). ). Such a type of PC beam supported only from below has a structure in which a floor load is received only by the PC beam installed below the floorboard.

[0003]

However, in the conventional PC beam type that supports the PC floor panel from below, as shown in FIG. 1, the floor load must be borne only by the PC beam installed below. Therefore, the PC floorboard cannot be supported over a long span, and as a result, the space becomes small, and the elderly who must move the partition walls and secure a large effective passage width due to changes in lifestyle. There is a problem that it is not possible to secure a large room or passage in a housing for the elderly. In FIG. 1, 1 is a PC floorboard and 10 is a PC beam. The present invention provides a PC floor structure capable of enlarging the span of a floor plate, securing a large space in a plane, moving a partition wall due to a change in lifestyle, and securing a large effective passage width. The task is to It is another object of the present invention to provide a floor structure of a PC structure which can reduce the height of the lower beam of the PC structure and ensure a three-dimensional expansion of the space.

[0004]

The present invention comprises a precast reinforced concrete floor plate, a precast reinforced concrete lower beam for supporting the floor plate from below, and a precast reinforced concrete upper beam for suspending and supporting the floor plate from above, The present invention relates to a precast reinforced concrete floor structure in which the lower beam and the upper beam are connected and integrated with each other across the floor plate. Further, the present invention comprises a precast reinforced concrete floor plate, a precast reinforced concrete lower beam for supporting the floor plate from below, and a precast reinforced concrete upper beam for suspending and supporting the floor plate from above, and the lower beam and the upper beam, The present invention relates to a precast reinforced concrete floor structure which is connected and integrated with a high-strength mortar-filled vertical stitch bolt across the floor plate.

[0005]

FIG. 2 is a sectional view showing a PC floor structure according to the present invention. PC floorboard 1 manufactured in advance at the factory
And a PC lower beam 2 supported from below and a PC upper beam 3 suspended and supported from above are used and assembled at a building site of a wall-type PC house.
In FIG. 2, 4 is a through hole, 5 is a vertical stitch bolt, 7 is a high strength mortar, 11 is a floor finishing plate, and 12 is a space under the floor.

The PC floor plate 1, the PC lower beam 2 and the PC upper beam 3 are connected and integrated by filling the through hole 4 with a high-strength mortar 7 after being tightened with the vertical stitch bolts 5 and nuts. I do. The vertical stitch bolt 5 has a diameter of, for example, 13
Up to 16mm, round steel or deformed steel with SR material
235 or SD295 is preferable, and has a form in which nuts can be tightened after being inserted into the through holes 4 at a building site (cut or rolled screw processing is applied to both ends). The vertical stitch bolt 5 may be embedded in the PC lower beam 2 at a factory in advance, and the through hole 4 and the notch 13 are provided in the PC lower beam 2 as shown in the figure, and the vertical stitch bolt 5 is provided later. May be inserted. The high-strength mortar 7 as a filler is obtained by appropriately selecting cement, water, sand and an admixture and mixing them at a predetermined mixing ratio, and has a high fluidity such that the mortar 7 easily flows into the through holes 4. It is preferably used, and its design reference strength is preferably 600 kg / cm ² or more.

In the present invention, the PC
After the installation beams 3 are installed, the floor finishing plate 11 is installed to secure the underfloor space 12. The dimensions and shapes of the PC lower beam 2 and the PC upper beam 3 may be appropriately changed in design according to design requirements and the like, but the shapes preferably have a rectangular cross section. The width of these beams is preferably 25 cm or less, 50 cm or less, and 762 cm or less in length. In the figure, each PC member of the PC lower beam 2 and the PC upper beam 3 is provided with a through hole 4 for connection and integration at a joint position with the PC floor plate 1 or the like. If necessary, an opening in the beam or the like may be formed in a portion where the piping sleeve or the like is formed.

[0008] A combination of a PC floor plate 1 and a PC lower beam 2 and a PC upper beam 3 sandwiching the PC floor plate makes it possible to provide a large space two-dimensionally and three-dimensionally, for example, 80 m ² even in a wall-type PC house.
The large space can be easily configured, and this large space can be freely divided by a small internal partition wall. Is easy to secure. Here, a space that is large in a plane means that one space formed by partitioning with PC walls or columns is large in a plane, and specifically, the PC floor plate 1 is sandwiched between the spaces. The space between the walls or columns can be increased by the PC lower beam 2 and the PC upper beam 3 installed in the above, so that a larger space can be formed in a plane than before. In addition, the three-dimensionally large space means, in other words, the height of the ceiling of the living room. Specifically, by installing the PC beam 3 above the PC floor plate 1, the PC floor plate 1 is supported from below. It is possible to reduce the length (projection length to the space) of the PC lower beam 2.

In the present invention, by using the vertical stitch bolt 5 and the high-strength mortar 7 having high fluidity, the PC floor plate 1, the PC lower beam 2, and the PC upper beam 3 can be easily integrated in a short time. can do. In addition, a high-quality and highly integrated PC floor structure can be formed without being affected by construction conditions such as a construction temperature, a curing temperature, and skills of a worker. Also, P
The underfloor space 12 constituted by the C floor plate 1 and the floor finish plate 11 arranged on the PC upper beam 3 can be used for storage and equipment piping.

[0010]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 3 is a schematic view of a PC house according to the present invention. The PC floor panel 1 is supported by a PC lower beam 2 supported from below and a PC upper beam 3 suspended and supported from above. In addition, PC lower beam 2 and PC upper beam 3
Although a straight member having a rectangular cross section, which is produced in advance in a factory and has a rectangular cross section as shown in the figure, is preferably used, the rectangular corner may be rounded. The PC lower beams 2 are arranged in the same position inside the PC floor plate 1 in plan view.

FIG. 4 shows a PC floor panel 1 and a PC according to the present invention.
It is sectional drawing of the joining part of the lower beam 2 and the PC upper beam 3. In FIG. 4, the PC lower beam 2 is 21 cm wide and 47 c
m, having a rectangular cross section of 651 cm in length is used. The PC upper beam 3 is 21 cm in width and 23 c in width.
m, a rectangular section having a length of 651 cm is used. Assembling is PC lower beam 2, PC floor panel 1,
After the PC members are set in the order of the PC upper beam 3, the vertical sewing bolts 5 are inserted into the through holes 4 or grooves previously provided at the respective joint positions at the factory, and the PC floor plate 1, the PC lower beam 2, and the PC Insert it into the beam 3 from above and tighten it with the nut 6. Thereafter, the high-strength mortar 7 is poured into the gap between the vertical stitch bolt 5 and the through hole 4 and filled, and the three PC members are connected and integrated. As the high-strength mortar 7, for example, the design standard strength using a high-performance dispersant as an admixture is 600 kg / c.
U grout H (manufactured by Ube Industries, Ltd.) having a trade name of m ² or more is preferable.

Next, a method of constructing a PC floor structure according to the present invention is described in P
This will be described with reference to FIG. PC floorboard 1, PC lower beam 2, which constitute the PC floor structure of the present invention,
The PC upper beam 3 is prepared in a factory at a predetermined size and shape by concrete and reinforcing steel before being carried into a building site by a truck. In FIG. 5, the through hole 4 is omitted and not shown. Next, the PC of the present invention is used on site.
To assemble into a floor-building structure, a PC that will be the building outline on the foundation
After the wall plate 8 and the PC receiving column 9 are joined by an anchor bolt embedded in the foundation by a crane, the PC lower beam 2 is set on the PC receiving column 9 by a crane. Then P
After the PC floor plate 1 is installed on the C lower beam 2, the PC upper beam 3 is installed on the PC floor plate 1. After the above operation is completed, as shown in FIG. 2 and FIG.
A vertical sewing bolt 5 is inserted into a vertical sewing through hole 4 provided in the floor plate 1 and the PC upper beam 3, and tightened with a nut 6. Then, a high strength mortar 7 is inserted into a gap between the bolt 5 and the through hole 4. Aim for integrated casting. In addition, the PC lower beam 2 and the PC wall plate 8 are bolts (not shown) in which bolts are inserted or embedded in through holes provided at respective joining positions.
Then, for example, two bolts (13 mmΦSR235) are used to join each other, and the PC-made receiving column 9 and the PC-made wall plate 8
Bolts are inserted or embedded in a plurality of through holes provided at each joint position (not shown),
For example, they are joined to each other with three bolts (13 mmΦSR235). Through the above procedure, a PC floor structure is constructed. When installing the house having the PC floor structure in a house on a plurality of floors, the above operation is repeatedly performed.

[0013]

According to the present invention, a large floor space can be secured because the PC floor plate is of a type in which the PC floor plate is sandwiched between two PC beams. Therefore, not only can a large living room be made possible, but also it is possible to easily change the internal partition, so that it is possible to expect effects such as easy adaptation to future changes in lifestyle. In addition, if a high-strength mortar-filled vertical stitch bolt is used for connecting and integrating the PC floorboard, PC lower beam and PC upper beam, the two PC beams can be made integral, and the PC floorboard can be moved downward. This can reduce the size of the PC beam supported from above. In addition, it is possible to realize a three-dimensionally wide space with a high ceiling. Furthermore, since the PC beam is installed on the PC floorboard,
There is an advantage that the space created between the flooring board and the floor finishing board can be used for applications such as underfloor storage and facility piping.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a conventional PC floor structure.

FIG. 2 is a cross-sectional view showing a PC floor structure of the present invention.

FIG. 3 is a schematic view of a PC house according to the present invention.

FIG. 4 is a perspective view of a PC floor panel 1, a PC lower beam 2, and a P according to the present invention.
It is sectional drawing of the joining part with C upper beam 3. FIG.

FIG. 5 is an on-site assembly diagram of a PC member having a PC floor structure according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 PC floor plate 2 PC lower beam 3 PC upper beam 4 Through hole 5 Vertical stitch bolt 6 Nut 7 High-strength mortar 8 PC wall plate 9 PC receiving column 10 PC beam 11 Floor finishing plate 12 Under floor 13 Cut Chip

Claims (2)

[Claims] 1. A precast reinforced concrete floorboard, a precast reinforced concrete lower beam for supporting the floorboard from below, and a precast reinforced concrete upper beam for suspending and supporting the floorboard from above, wherein the lower beam, the upper beam and Is a precast reinforced concrete floor structure that is connected and integrated with the floor plate interposed therebetween. 2. The lower beam and the upper beam are connected and integrated with a high-strength mortar-filled vertical stitch bolt across a floor plate.
The precast reinforced concrete floor structure according to 1.