JP3437116B2 - Precast concrete plate, slab and method of constructing the same - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a precast concrete plate, a slab, and a method for constructing the same.

[0002]

2. Description of the Related Art A slab of a reinforced concrete structure, as shown in FIG. 15, has a top concrete 4 on a precast concrete plate 45 called a so-called half PC.
It is constructed by placing six. In this slab 47, truss bars 49 are arranged on the upper surface of a concrete plate 48 at appropriate intervals, and a precast concrete plate 45 in which a lightweight formwork 50 is arranged between these truss bars 49 is placed between the beams in an adjacent state. It is constructed by forming a lower floor 51, arranging the slab upper end reinforcements 52 on the lower floor 51, and placing the top concrete 46 therein.

[0003]

However, in the construction of the above slab, it takes time and effort to arrange the upper end bar of the slab on the lower floor, and it is difficult to control the curing of the top concrete and maintain its homogeneity. Was difficult.

The present invention has been made in view of these problems, and an object thereof is to provide a precast concrete plate, a slab and a method for constructing the precast concrete plate, which can easily perform a work for arranging a slab upper end bar and a curing management of cast-in-place concrete. Is to provide.

[0005]

Means for solving the above-mentioned problems are as follows.
Arranged upper concrete board and lower concrete board of the same size
Cleat plates and the like are arranged at appropriate intervals between them.
Are connected by the truss muscles, and between these truss muscles, on the upper surface
A grooved lightweight formwork with grooves is placed and
The concrete on the concrete plate is
Characterized by reinforcing ribs formed on the concrete plate
It is a thing. The invention of claim 2 is the same as that of claim 1.
And a lightweight formwork with a groove between the truss lines, a short lightweight formwork,
One or more of medium-sized lightweight formwork and long-sized lightweight formwork
The above-mentioned middle-sized lightweight formwork is placed in combination with the above, and is short and light.
It has twice the length of the quantity formwork, and the long lightweight formwork has truss bars.
It is characterized by having the same length. Also
A third aspect of the present invention is the same as the third aspect, which is arranged to face each other with an appropriate interval.
The same size upper concrete board and lower concrete board
However, with truss muscles arranged at appropriate intervals between these
Between these truss bars, joined by a narrow lightweight formwork.
Lightweight formwork unit that is placed facing each other with a gap
Is installed, and the concrete of the upper concrete plate is
When the reed is placed, the reinforcing ribs are on the upper concrete plate.
It is characterized by being formed. Claim 4
Invention, in claim 3, the lightweight formwork between the truss muscles
Unit, short lightweight form, medium lightweight form, long lightweight form
Arranged by combining one or more of the frames
The medium lightweight formwork has twice the length of the short lightweight formwork.
However, the long lightweight formwork had the same length as the truss reinforcement.
It is characterized by. Further, the invention of claim 5 is appropriately
Upper concrete blocks of the same size that are arranged facing each other with a gap
Between the board and the lower concrete board.
These trusses are connected by truss muscles that are laid out at intervals.
Lightweight type with a hole that has a through hole in the groove on the upper surface between the ribs
A frame is provided, and the upper concrete plate is provided in the groove and the through hole.
Concrete has been poured into the upper concrete board.
Strong ribs and resistors in contact with the lower concrete plate are formed
It is characterized by being done. In addition, from claim 6
According to any one of claims 1, 3, and 5,
A lightweight formwork is used between any of the truss muscles between the lath muscles.
It is characterized in that it is not provided. Claim 7
The invention according to any one of claims 1, 3, 5, and 6,
Multiple truss streaks close to the side edges of the concrete plate
It is characterized by being arranged. Claim 8
The invention of claim 1 is the precast concrete of claims 1, 3, and 5.
Precast concrete of at least one of the board
The concrete plates are arranged with the REIT plates adjacent to each other.
In-situ concrete was cast between the two
It is a slab. In addition, the invention of claim 9 is
At least one of the 5 precast concrete boards
Precast concrete plates of at least one kind are adjacent to each other between beams
Placed on the beam and installed facing the beam
Arrange the connecting bars at the ends of the reed plate, and
Conc on a precast concrete board
A slab that casts in-place concrete between the reet boards.
Is the construction method.

When the slab is built
Forming a precast concrete board that can eliminate the streak work
can do. Also, by combining various lightweight formwork
By arranging it, light weight of precast concrete board
In addition to quantification, in the precast concrete board
Can change the strength of the
Lightweight floor impact sound performance and air propagation of reinforced concrete plates
Improved sound performance (hereinafter referred to as lightweight floor impact sound performance, etc.)
It Also, a tiger that is shorter than the truss line between the concrete plates
A step portion is formed by the streak. Again facing concrete
The lightweight floor impact sound performance of the touch panel is improved. Also
Concrete cast in-situ between trusses without lightweight formwork
Since the board is placed, the strength is increased. Again conc
It is possible to increase the strength of the side end portion of the reed plate. Well
Cast concrete placed between concrete plates
Can be homogenized. In addition, a lightweight floor impact sound performance is high
You can build your own. In addition, arrange the upper slab reinforcement
It saves time and labor, and is placed between concrete boards.
It is possible to easily control the curing of concrete and make it homogenized.
Can be achieved. It is also placed between concrete boards
Concrete is homogeneous and has high performance such as lightweight floor impact sound performance.
A good slab can be built in a short period of time.

[0007]

[0008]

[0009]

[0010]

[0011]

[0012]

[0013]

[0014]

[0015]

[0016]

[0017]

[0018]

[0019]

[0020]

[0021]

[0022]

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a precast concrete plate, a slab and a method for constructing the same according to the present invention will be described in detail below with reference to the drawings. Embodiments of the precast concrete board will be described with reference to FIGS. 1 to 8, and embodiments of the slab and the method for constructing the slab will be described with reference to FIGS. 9 to 14. The precast concrete plate will be described in the first to eighth embodiments, and the slab will be described in the first to third embodiments. In each of the embodiments, the same components will be denoted by the same reference numerals. , Different configurations will be described with different reference numerals.

1 (1) and 1 (3) are cross-sectional views of the precast concrete plate of the first embodiment, and FIG. 2 (2) is a plan view of the precast concrete plate without the upper concrete plate.

In a precast concrete plate (hereinafter referred to as a PC plate) 1, upper and lower concrete plates 2a and 2b of the same size and opposed to each other with an appropriate interval are joined by a truss bar 3 arranged between them. Short lightweight molds 4 are arranged between these trusses 3 at appropriate intervals. Therefore, a gap 5 in which cast-in-place concrete is poured is formed between the upper and lower concrete plates 2a and 2b.

Five truss bars 3 are arranged at appropriate intervals, and both ends thereof are embedded in the upper and lower concrete plates 2a and 2b. The truss muscle 3 is a truss in which one upper chord muscle (top muscle) 6 and two lower chord muscles (lower muscle) 7 arranged in a triangular shape are joined by a wavy lattice muscle 8.
The upper chord muscle 6 and the lower chord muscle 7 are the upper and lower concrete plates 2a,
It is joined to the bending reinforcing bar 9 in 2b. The truss muscles 3 are not limited to those described above, and may be trusses in which one upper chord muscle and one lower chord muscle are joined by a wave-shaped lattice muscle. Further, the number of truss muscles 3 is not limited to that shown in the figure, and may be more or less.

The short lightweight formwork 4 arranged between these truss bars 3 is of a normal size having a predetermined number of hollow portions 10,
That is, it is 40 to 45 cm × 120 cm, and specifically, a synthetic resin foam-molded product obtained by in-mold foam molding such as expanded polystyrene is used. In addition, from ethylene-based resin, propylene-based resin, etc. It is also possible to use a foamed molded article or the like. The material is not particularly limited as long as it is lighter than concrete, and may be metal or paper. Further, the number of the hollow portions 10 is not limited to the above, and may be less than or more than this, and may be the short lightweight mold 4 without the hollow portions 10.

Thus, the upper and lower concrete plates 2a, 2
The PC board 1 formed in b can be laid between the beams, and a slab can be formed simply by pouring in-situ concrete between the upper and lower concrete boards 2a and 2b.
Curing management of cast-in-place concrete can be done easily.

FIG. 2 shows a PC board 11 according to a second embodiment, in which a short and lightweight mold 4, a medium and lightweight mold 12, and a long and lightweight mold 13 and 13 are arranged in an arbitrary combination. Is.
Here, the medium-sized lightweight mold 12 has a length twice or more the length of the short-sized lightweight mold 4. The long lightweight formwork 13 has a length substantially equal to that of the truss reinforcement 3. In this way, by arranging the lightweight formwork 4, 12, 13 having different sizes (lengths) in combination,
The strength of the PC board 11 can be changed. Also, the combination of the three types of lightweight molds 4, 12, 13 can be arbitrarily changed, and the short lightweight mold 4 and the medium lightweight mold 12, the short lightweight mold 4, the long lightweight mold 13, and the medium lightweight. In addition to the combination of the mold 12 and the long lightweight mold 13, as shown in (3) of FIG. 2, a PC provided with only the long lightweight mold 13 or the medium lightweight mold (not shown) 12 The plate 14 can be formed.

FIG. 3 shows the PC board 15 of the third embodiment, in which the short lightweight mold 4 is not provided between some of the truss bars 3, and the short lightweight mold 4 is not provided. Since the cast-in-place concrete is placed between the truss bars 3, the strength here is higher than others. The PC board 15 not provided with the short lightweight mold 4 can also be formed by a PC board in which various lightweight molds 4, 12 and 13 are combined as shown in FIG.

FIG. 4 shows a PC board 16 according to a fourth embodiment of the present invention, in which two truss bars 3 are arranged adjacent to both sides of the upper and lower concrete boards 2a and 2b.
Since the strength at both side portions of 6 becomes large, the joint portion with another PC plate laid adjacently when forming a slab using this is strengthened. The PC board 16 in which two truss muscles 3 are arranged close to each other is the PC board 1 or 1 shown in FIGS.
It is also possible to form 2 and 15.

FIG. 5 shows a PC board 17 according to a fifth embodiment of the present invention, in which a grooved lightweight mold 18 is arranged between trusses 3. As shown in (3) of FIG. 5, the grooved lightweight formwork 18 is provided with grooves 19 which are vertically and horizontally crossed on the upper surface.
The concrete of the upper concrete plate 2a is placed on the upper concrete plate 2a, and the reinforcing ribs 20 are formed on the upper concrete plate 2a. The reinforcing ribs 20 increase the rigidity of the upper concrete plate 2a and make the natural frequency different from that of the lower concrete plate 2b, thereby preventing these resonance phenomena and enhancing the lightweight floor impact sound performance and the like. The interval (pitch), width, and depth of the grooves 19 are set according to the lightweight floor impact sound performance and the like. The number of the grooves 19 is not limited to that shown in the figure, and may be more or less. further,
It is also possible to form a PC board (not shown) in which the grooved lightweight mold 18 and at least one of the short lightweight mold 4, the medium lightweight mold 12, and the long lightweight mold 13 are combined. it can.

FIG. 6 shows a PC board 21 of a sixth embodiment, in which each of the trusses has a lightweight form unit 24 in which a narrow lightweight form 22 is placed facing each other with a slight space 23. It is arranged between the streaks 3, and concrete of the upper concrete plate 2a is placed in the gap portion 23 to form reinforcing ribs 25 on the upper concrete plate 2a. The reinforcing ribs 25 can exhibit the same performance as the PC board 17 of FIG. The narrow lightweight formwork 22 has a width of 21 cm or less, and has a conventional lightweight formwork (width 43 or 40c).
m, a length of 120 cm, and a hollow forming mold which is about half the size of a lightweight mold, and it may be formed alone or may be formed by cutting a conventional lightweight mold into halves. The narrow lightweight mold 22 is made of the same material as the grooved lightweight mold 18. In addition, a PC board in which the lightweight mold unit 24 and any one or more of the short lightweight mold 4, the medium lightweight mold 13, the long lightweight mold 14, and the grooved lightweight mold 18 are combined (see FIG. (Not shown) can be formed.

FIG. 7 shows a PC board 26 according to a seventh embodiment of the present invention, in which a lightweight mold 28 with a hole having a cylindrical through hole 27 is provided at the intersection of the groove 19. The groove 19
And the through hole 27, the concrete of the upper concrete plate 2a
To the reinforcement ribs 2 on the upper concrete plate 2a.
0, and the resistor 29 in contact with the lower concrete 2b are formed. The reinforcing ribs 20 can exhibit the same performance as that of the PC board 11 of FIG. 2, and the resistor 29 can change the natural frequency of the lower concrete board 2b.

FIG. 8 shows a PC board 30 according to an eighth embodiment of the present invention, in which two concrete pieces 31 and 32 of different sizes, which are opposed to each other with appropriate intervals, are joined by truss bars 3.
At the protruding portion of the lower concrete plate 32, which protrudes from the upper concrete plate 31, truss reinforcements 3a which are shorter than the truss reinforcements 3 are arranged. Therefore, the step portion is formed with a difference in height between the upper concrete plate 31 and the short truss reinforcement 3a. A short lightweight mold 4 is disposed between the upper and lower concretes 31, 32. The short lightweight mold 4 includes a medium lightweight mold 13 and a long lightweight mold 1.
4, the grooved lightweight mold 18, the lightweight mold unit 24, and the holed lightweight mold 28 may be combined and arranged.

9 and 10 show the slab 33 of the first embodiment, in which the upper and lower concrete plates 2a and 2b which are opposed to each other with an appropriate interval are joined to each other by a truss bar 3 to form a PC plate 34 between the beams. They are laid adjacent to each other, and a cast-in-place concrete 35 is cast between the upper and lower concrete pieces 2ba, 2b to construct the construction. The cast-in-place concrete 35 is sandwiched between the upper and lower concrete pieces 2ba and 2b, so that it is finished homogeneously.

As shown in FIG. 10, the construction method of this slab 33 is as follows.
6 and the long beam 37 are laid so that the long sides are in close contact with each other. On the other hand, the short side 34a of the PC board 34 is the short beam 3
6 is installed on the other side of the PC board 34 and faces the short side 34b of the other PC board 34. Then, the opposing short sides 34a, 3
A connecting bar 38 for connecting with the short beam 36 is arranged over 4b. Next, the short side 3 of these PC boards 34, 34
The cast-in-place concrete 35 is poured between the upper and lower concrete portions 2a and 2b from the void portion 39 formed by 4a and 34b. In this cast-in-place concrete 35, since the upper and lower concretes 2a and 2b serve as forms, the curing management is simple and the concrete is finished homogeneously, and the construction of the slab 33 is completed. In this way, since the upper and lower concrete 2a, 2b serving as a formwork are manufactured in advance in the factory, the level accuracy of the upper surface of the slab is high, and the reinforcement of the slab upper end bar can be omitted. Therefore, the slab 33 can be easily constructed and the construction period can be greatly shortened.

11 and 12 show a slab according to the second embodiment, which is a hollow slab 41 in which short lightweight formwork 4 is embedded at appropriate intervals between truss bars 3 between upper and lower concrete portions 2a and 2b. is there. That is, this hollow slab 41 is constructed using the PC board 1 of FIG.
It is lightweight and has a certain strength. In addition, the PC boards 11, 15, 16, 17, 21 shown in FIGS.
By using 26, it is possible to construct a slab having a high floor impact sound performance and a slab having a change in strength as a whole. The method for constructing the slab is the same as that for the slab 33 in FIGS. 9 and 10.

13 and 14 show the slab of the third embodiment, which was constructed using the PC board 30 of FIG.
It is a hollow slab 42 having a step 43. In-situ concrete 35 between upper and lower concrete plates 31, 32
When piling is performed, the step portion 43 is formed with a height difference between the upper concrete plate 31 and the short truss reinforcement 3a. As described above, by using the PC plate 30 of FIG. 8, the step portion 43 can be easily formed at an arbitrary position of the slab 42. The construction method of this hollow slab 42 is as follows.
It is assumed that the slab 33 of FIG. 9 and FIG. 10 is constructed by the same method, and the same performance as the slab 33 can be exhibited.

[0040]

EFFECT OF THE INVENTION It is possible to form a PC plate that can omit the work of arranging the upper end reinforcement of the slab when constructing the slab.

By arranging various lightweight forms in combination, the weight of the PC board can be reduced and the strength inside the PC board can be changed.

The lightweight floor impact sound performance of the PC board is improved.

Due to the difference in height between the concrete plate and the truss bar having a short height, the step portion can be easily formed.

Since the cast-in-place concrete is placed between the truss bars without the lightweight formwork, the strength is increased.

The strength of the side edges of the concrete board can be increased.

The cast-in-place concrete cast between the concrete plates becomes homogeneous.

It is possible to construct a slab having a high floor impact sound performance and the like.

The labor for arranging the slab upper end reinforcements can be saved, and the curing of the concrete cast between the concrete plates can be easily carried out, and the homogenization can be achieved.

[Brief description of drawings]

FIG. 1 is a PC according to a first embodiment.
Sectional drawing of a board, (2) is a top view which abbreviate | omitted the upper concrete board.

2A and 2B are a PC according to a second embodiment.
The top view which abbreviate | omitted the upper concrete board of a board, (2) is the same sectional drawing.

FIG. 3 is a plan view of a PC board of a third embodiment in which an upper concrete board is omitted.

FIG. 4A is a cross-sectional view of a PC board according to a fourth embodiment,
(2) is a plan view in which the upper concrete plate is omitted.

FIG. 5 (1) is a cross-sectional view of a PC board according to a fifth embodiment,
(2) is a plan view with the upper concrete plate omitted, (3)
And (4) are perspective views of a short lightweight mold.

FIG. 6A is a sectional view of a PC board according to a sixth embodiment,
(2) is a plan view with the upper concrete plate omitted, (3)
[Fig. 3] is a perspective view of a lightweight form unit.

FIG. 7 (1) is a sectional view of a PC board according to a seventh embodiment,
(2) is a plan view with the upper concrete plate omitted, (3)
FIG. 4 is a plan view of a lightweight mold with a hole, (4) is a sectional view taken along line AA of (3), and (5) is a sectional view taken along line BB of (3).

FIG. 8 (1) is a cross-sectional view of a PC board according to an eighth embodiment,
(2) is a plan view of the same, (3) is a plan view omitting the upper concrete plate.

FIG. 9 is a cross-sectional view of the slab according to the first embodiment.

FIG. 10 is a plan view of the slab according to the first embodiment.

FIG. 11 is a cross-sectional view of the slab according to the second embodiment.

FIG. 12 is a plan view of a slab according to a second embodiment.

FIG. 13 is a sectional view of a slab according to a third embodiment.

FIG. 14 is a plan view of a slab according to a third embodiment.

FIG. 15 is a cross-sectional view of a conventional slab.

[Explanation of symbols]

1, 11, 14, 15, 16, 17, 21, 26, 3
0, 34 PC board 2a, 2b, 31, 32 Concrete board 3 Truss reinforcement 3a Short truss reinforcement 4 Short lightweight formwork 5, 23 Gap 6 Upper chord muscle 7 Lower chord muscle 8 Lattice muscle 9 Bending reinforcement 10 Hollow 12 Medium lightweight formwork 13 Long lightweight formwork 18 Grooved lightweight formwork 19 Grooves 20, 25 Reinforcing ribs 22 Narrow lightweight formwork 24 Lightweight formwork unit 27 Through hole 28 Lightweight formwork 29 with holes 33 Resistor 33, 41, 42 Slab 35 Cast-in-place concrete 36 Short beam 37 Long beam 38 Connecting bar 39 Void 43 Step

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Claims (9)

(57) [Claims] 1. The same size, which is arranged to face each other at an appropriate interval.
Kisa's upper concrete plate and lower concrete plate,
Joined by truss muscles arranged at appropriate intervals between these
A groove formed on the upper surface between these truss lines
A lightweight formwork with a
Concrete has been poured into the upper concrete board.
Precast concrete board with strong ribs . 2. A lightweight formwork with a groove between the trusses and a short length
Any of lightweight formwork, medium size lightweight formwork, long size lightweight formwork
The above-mentioned medium-sized lightweight type
The frame is twice as long as the short lightweight formwork, and the long lightweight formwork
The precast concrete board according to claim 1, wherein the precast concrete board has a length equivalent to that of the truss reinforcement. 3. The same size, which is arranged facing each other with an appropriate interval.
Kisa's upper concrete plate and lower concrete plate,
Joined by truss muscles arranged at appropriate intervals between these
Between these trusses, a narrow lightweight formwork is used
A lightweight formwork unit that is placed facing each other
And the concrete of the upper concrete plate is installed in the gap.
Are placed, and reinforcing ribs are formed on the upper concrete plate.
Precast concrete board characterized by being made . 4. A lightweight formwork unit between the truss bars and a short
Any of the long and light formwork, medium and lightweight formwork
One or more of them are installed in combination, and the size is medium and lightweight.
The formwork is twice as long as the short lightweight formwork.
The precast concrete board according to claim 3, wherein the precast concrete board has the same length as the truss reinforcement. 5. The same size, which is arranged facing each other with an appropriate interval.
Kisa's upper concrete plate and lower concrete plate,
Joined by truss muscles arranged at appropriate intervals between these
A through hole is provided in the groove on the top surface between these truss lines.
A lightweight formwork with a hole is installed in the groove and the through hole.
When the concrete of the upper concrete plate is placed, the upper part
Connect the reinforcing ribs to the concrete plate and the lower concrete plate.
A precast concrete board, characterized in that a formed resistor is formed . 6. Any one of a plurality of truss muscles
The precast concrete board according to any one of claims 1, 3 and 5, wherein a lightweight formwork is not provided between the lath streaks . 7. A plurality of tigers are provided on the side edge of the concrete plate.
2. The muscles are arranged in close proximity to each other .
The precast concrete board according to any one of 3, 5, and 6. 8. The precast concrete according to claim 1, 3, or 5.
At least one or more precast cast boards
A concrete plate is placed between the beams so that
In-situ concrete is cast between the decks.
Slabs characterized in that it. 9. The precast concrete according to claim 1, 3, or 5.
At least one or more precast cast boards
Place the cleats between the beams so that they face each other.
Contact the edges of the precast concrete boards installed
Recast the sphincter and precast from these opposite points
Casting between concrete boards in concrete boards
A method for constructing a slab, which comprises placing concrete .