JP4068995B2 - Fan-shaped non-beam slab - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fan-shaped non-beam plate slab which is a slab with a step having a step portion and can be laid without a beam or a small beam at a corner portion of a structure.
[0002]
[Prior art]
In general, a PC composite floor is a structure in which a precast PC plate and cast-in-place concrete are integrated to construct a concrete floor slab. In particular, a stepped PC plate is a floor with a difference in height of a building, such as a bathroom part. Used for. In recent years, in housing and public buildings, barrier-free design philosophy in which floor steps are eliminated in consideration of users such as the elderly and the physically disabled has become common. In the design of on-site concrete floors, if there is a partial height difference in the floor due to finishing, equipment piping, etc., in order to construct a floor slab low in advance, a small beam and a grandchild beam are provided. It was.
However, in this case, the construction is complicated, and there are cases where inconveniences in the design plan arise due to the provision of the small beams in a building where the floor height is severely restricted.
[0003]
FIG. 7 is a plan view showing an example of a procedure for assembling a floor slab at a corner portion of a conventional structural building. Here, when the floor slab 1 is laid at the corner of the structural building, the beams 2 and 3 are provided between the pillars 1A, 1B, and 1C, and the floor slab 1 is attached to the beams 2 and 3 and the beam 4 on the window side. It was built between five.
[0004]
[Problems to be solved by the invention]
However, when a floor slab structure is constructed using a conventional floor slab at the corner portion of the structural building, there is a drawback that the beams 2 and 3 must be provided between the pillar 1A, the pillar 1B, and the pillar 1C. Existed. In addition, in order to construct a step slab at the corner, a small beam and a grandchild beam were required.
[0005]
The present invention has been proposed in view of the above, and it is intended to provide a fan-shaped non-beam plate slab that does not require building a beam or a small beam between columns when building a floor slab at the corner of a structural building. Objective.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in claim 1 includes a plate-shaped first fan-shaped slab element and a second fan-shaped slab element in which a plurality of ribs are formed on the upper surface of the plate-shaped member. A fan-shaped non-beam plate slab used for a corner portion of a building integrated through a stepped portion, and overlapping a distal end portion of the first slab element and a proximal end portion of the second slab element , Reinforcing bars are arranged in a portion where the insertion rib projecting from the base end side of the second fan-shaped slab element and the first fan-shaped slab element are overlapped with a predetermined space. It is characterized by placing concrete from the surroundings and integrating them.
[0007]
The invention according to claim 2 is characterized in that the insertion rib is formed by extending the rib, and the PC steel material is disposed in a state in which tension is applied. And
[0008]
The invention according to claim 3 is characterized in that the insertion rib is formed with a plurality of cotters .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings illustrating an embodiment. FIG. 1 is a plan view showing a construction example using a fan-shaped non-beam slab according to the present invention, FIG. 2 is a plan view showing an assembling procedure of the fan-shaped non-beam slab according to the present invention, and FIG. It is a top view which shows the example of an assembly of a non-beam board slab. Here, the fan-shaped non-beam slab 10 is a fan-shaped non-beam slab in which the first fan-shaped slab element 11 and the second fan-shaped slab element 12 are integrated through a step portion, The first slab element 11 and the second slab element 12 are partially overlapped and overlapped, and reinforcing bars are arranged in the overlapped portion, and concrete is cast from the surroundings to be integrated.
[0010]
The first slab element 11 has a substantially fan shape, the main part 11a is narrow, and is expanded toward the tip. Moreover, the junction part 11b which overlaps a part of 2nd fan-shaped slab element 12 is formed in the front-end | tip. In order to form a stepped portion in the overlapping portion of the first sector slab element 11 and the second sector slab element 12, the junction 12a of the second sector slab element 12 is placed on the junction 11b. Only the insertion rib is formed in the joint portion 12a, and a plurality of cotters may be formed on the insertion rib.
[0011]
The second slab element 12 is configured such that the proximal end portion is narrow and the distal end is expanded. The second fan-type slab element 12 is provided with a rib 12b continuous with the insertion rib, and a PC steel material is arranged inside the rib.
[0012]
After the first slab element 11 and the second slab element 12 configured as described above are overlapped so as to form a stepped portion at the joint 12a, reinforcing bars are arranged in the overlapped portion from the periphery. Place concrete and integrate. If a fan-shaped non-beam slab is constructed in this way, a floor slab with a step can be constructed without a small beam at the corner of a building where a large slab is planned.
[0013]
Moreover, in the rib 12b formed in the upper surface of the 2nd fan-shaped slab element 12, PC steel material is arrange | positioned in the state to which tension | tensile_strength was provided. When a plurality of cotters are formed on the insertion rib, the first sector slab element 11 and the second sector slab element 12 can be more firmly integrated.
[0014]
FIG. 4 is a longitudinal sectional view when a concrete composite slab is constructed using the fan-shaped non-beam slab shown in FIG. As shown in the figure, the main part 11a is placed on a bracket 14 in which the fan-shaped non-beam slab 10 configured as described above is formed around the pillar 13, and the expanded tip is formed between the pillars 15 on the window side. Place on the beam 16. Thereafter, concrete 17 is placed from above to form a composite slab.
[0015]
FIG. 5 is a plan view showing another construction form of the fan-shaped non-beam slab of the present invention, and FIG. 6 is a plan view showing an assembling procedure of the fan-shaped non-beam slab shown in FIG. In the present embodiment, the corner of the building where the large slab is planned is formed in a quarter circle shape, and the window-side pillars 19 are arranged at equal distances around the pillar 18. In such a configuration, the fan-shaped non-beam slab 20 is a fan-shaped non-beam slab in which a first fan-shaped slab element 21 and a second fan-shaped slab element 22 are integrated through a step portion. The first slab element 21 and the second slab element 22 are partially overlapped and overlapped, a reinforcing bar is placed in the overlapped portion, and concrete is placed from the periphery.
[0016]
The first fan-shaped slab element 21 is substantially the same as that of the first embodiment, but the second fan-shaped slab element 22 has a widened tip portion 22a formed in an arc shape.
[0017]
When configured as described above, the fan-shaped non-beam slab 20 is formed around the pillar 18 without providing a beam to support when the corner of the structure is formed in a quarter circle shape. It can be passed between the beam spanned between the bracket 23 and the column 19 on the window side. Therefore, according to the fan-shaped non-beam slab 20 of the present embodiment, the stepped floor slab can be constructed without a small beam, and the degree of freedom in design can be remarkably improved.
[0018]
【The invention's effect】
Since this invention consists of an above-described structure, there can exist an effect which is demonstrated below.
[0019]
In the first aspect of the present invention, the plate-shaped first fan-shaped slab element and the second fan-shaped slab element in which a plurality of ribs are formed on the upper surface of the plate-shaped member are integrated via the stepped portion. A fan-shaped non-beam slab for use in a corner portion of a building, wherein the second slab element is overlapped with a distal end portion of the first slab element and a base end portion of the second slab element. A reinforcing bar is placed in a portion where the insertion rib projecting from the base end side and the first fan-shaped slab element overlap each other with a predetermined space, and concrete is placed from the periphery. Since they are integrated, they can be laid at the corners of the structure without beams or small beams, and free plane planning is possible. In addition, in consideration of users such as the elderly and the physically handicapped, it becomes easy to design a barrier-free design with no floor steps. Furthermore, it is superior in terms of yield strength than the conventional one in which the stepped portion is reinforced only with reinforcing bars.
[0020]
According to the invention described in claim 2, the insertion rib is formed by extending the rib, and the PC steel material is disposed in a state in which tension is applied . It becomes difficult to come off and a stronger bond is possible. Therefore, a greater proof stress can be obtained compared to the conventional case. In addition, a floor slab with a step can be constructed without a beam at the corner of a building where a large slab is planned.
[0021]
According to the invention described in claim 3, since the insertion rib is formed with a plurality of cotters, the coupling of the overlapping portion of the first slab element and the second slab element is further strengthened. And can accommodate large span floor slabs.
[Brief description of the drawings]
FIG. 1 is a plan view showing a construction example using a fan-shaped non-beam slab according to the present invention.
FIG. 2 is a plan view showing a procedure for assembling the fan-shaped non-beam slab.
FIG. 3 is a plan view showing an assembly example of the fan-shaped non-beam slab.
FIG. 4 is a longitudinal sectional view when a concrete composite slab is constructed using the fan-shaped non-beam slab shown in FIG. 3;
FIG. 5 is a plan view showing another construction form of the fan-shaped non-beam slab.
6 is a plan view showing an assembling procedure of the fan-shaped non-beam plate slab shown in FIG. 5. FIG.
FIG. 7 is a plan view showing an example of a procedure for assembling a floor slab at a corner portion of a conventional structural building.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Fan type non-beam board slab 11 1st fan type slab element 11a Main part 11b Joint part 12 2nd fan type slab element 12a Joint part 12b Rib 13 Column 14 Bracket 15 Column 16 Beam 17 Concrete 18 Column 19 Column 20 Fan Dieless plate slab 21 first fan slab element 22 second fan slab element 23 bracket

Claims (3)

Sector type used in the corner of the building and the second fan-shaped slab elements in which a plurality of ribs on the upper surface of the plate-shaped first fan-shaped slab elements and the plate-like member is formed are integrated via a step portion Non-beam plate slab,
The top end of the first slab element and the base end of the second slab element are overlapped, and the insertion rib projecting from the base end of the second sector slab element and the first A fan-shaped non-beam plate slab , wherein a reinforcing bar is placed in a portion where one fan-shaped slab element is overlapped with a predetermined space, and concrete is cast from the surroundings to be integrated.   2. The fan-shaped fan according to claim 1, wherein the insertion rib is formed by extending the rib, and the PC steel material is disposed in a state in which a tensile force is applied. Beam plate slab.   The fan-shaped non-beam slab according to claim 1 or 2, wherein the insertion rib is formed with a plurality of cotters.

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