JP2019070273A - Floor structure using precast composite slab, widening plate, and precast composite slab, and building - Google Patents

Abstract

To provide a floor structure and a building using a precast composite slab, a plate for widening, and a precast composite slab excellent in workability and economy which is possible to cope smoothly with floors such as multi-dwelling houses that require through-holes for equipment piping by applying concrete to the deck plate for synthetic slabs and putting in concrete to realize a precast synthetic slab.SOLUTION: A widening plate 2 having a substantially L-shaped cross section including horizontal portions 2a and rising portions 2b is provided at both ends in the width direction of a synthetic slab deck plate 1 over the entire length (span length) of the synthetic slab deck plate 1, and a concrete 3 is cast on the surfaces of the synthetic slab deck plate 1 and the widening plate 2.SELECTED DRAWING: Figure 1

Description

  The present invention belongs to the technical field of precast synthetic slabs, and more specifically, a deck plate for synthetic slabs in which a corrugated steel plate conventionally used for placing concrete at a construction site is provided with a synthesis mechanism such as embossing or key groove. The present invention relates to a precast synthetic slab realized using

  Deck plates for synthetic slabs, in which corrugated steel plates mainly used in steel construction are subjected to a synthetic mechanism such as embossing or key groove, the deck plate plays a role of formwork, and after hardening of concrete, it also plays the role of tensile rebar Demands have continued to grow in recent years, with a share of about 60% of deck plates being occupied, as there are many advantages such as achieving rational construction to be achieved and achieving weight reduction of slabs.

  On the other hand, the precast slab currently put to practical use is generally a reinforced concrete plate or an ALC panel (lightweight aerated concrete), and there is no example of a precast composite slab realized using the deck plate for composite slab. The technique is limited to the technique of constructing a half-type precast synthetic slab using the deck plate for synthetic slab as described in Patent Document 1 at most and casting concrete on site (see FIG. 1 of the same Patent Document 1).

Japanese Patent Application Publication No. 07-207794

The precast composite slab using the deck plate for composite slab can save time and labor for putting concrete on site and has not been put to practical use so far although its workability is good.
One possible reason is that the deck plate for synthetic slabs does not have a uniform thickness due to the geometrical characteristics of the corrugated steel plate in which the ridges and valleys are alternately connected to each other via the inclined portions. In addition, the width dimension of the top (flat surface) of the peak and valley is as narrow as about 115 to 125 mm, and through holes (longitudinal holes) for equipment piping required for slabs (floors) of multi-dwelling houses etc. are properly provided. The point which can not be mentioned is mentioned.

That is, even if it was possible to realize a precast synthetic slab by using the synthetic slab deck plate as it is, it was apparent that installation piping was difficult in the following points.
(1) First, the hole diameter for equipment piping is required to be about φ125 to 150 mm, and in order to drill a through hole that satisfies this, it is necessary to drill including the inclined portion between the peak and valley. It was necessary to set up, and it took time and effort for construction, and it was very complicated.
(2) Even if the through hole can be drilled, the slab thickness through which the through hole passes is usually required to be 100 mm or more from the viewpoint of fire resistance performance, and the slab thickness at the ridge of the deck becomes thinner (usually 50 to 80 mm When it is made to penetrate, it is necessary to change the piping from PVC pipe to non-combustible material, and it is not practical because it is a drastic change of specification such as change of pipe specification or limitation of pipe size.

  The present invention has been made in view of the problems of the background art described above, and the object of the present invention is to pre-cast a synthetic slab by casting concrete after devising the deck plate for a synthetic slab. The precast composite slab excellent in workability and economic efficiency, a plate for widening, and a precast composite, which can be smoothly coped with even if it is a floor of an apartment house or the like where a through hole for equipment piping is required. A floor structure using a slab, as well as providing a building.

  As means for solving the above-mentioned problems, the precast composite slab according to the invention described in claim 1 is a widening of a substantially L-shaped cross section including horizontal portions and rising portions at both widthwise end portions of the deck plate for composite slabs Plates are provided over the entire length of the synthetic slab deck plate, and concrete is cast on the surfaces of the synthetic slab deck plate and the widening plate.

  According to a second aspect of the present invention, in the precast composite slab according to the first aspect, the widthwise end edge portion of the horizontal portion of the widening plate is hooked to a joint portion of the synthetic slab deck plate It is characterized in that a hooking portion is formed to prevent the sliding movement in the direction.

  The invention described in claim 3 is the precast composite slab according to claim 1 or 2, wherein the rising portion of the widening plate is formed in a concavo-convex shape capable of meshing with the rising portion of another adjacent widening plate. It is characterized by

  The invention described in claim 4 is characterized in that, in the precast synthetic slab described in any one of claims 1 to 3, the width dimension of the horizontal portion of the plate for widening is set to 150 mm or more. Do.

  The invention described in claim 5 is characterized in that, in the precast synthetic slab described in any one of claims 1 to 4, the height of the rising portion of the widening plate is set to 60 mm or more. Do.

  In the invention described in claim 6, in the precast synthetic slab described in any one of claims 1 to 5, a hole for passing equipment piping is drilled in the horizontal portion of the plate for widening, and the drill It is characterized in that a concrete through hole passing through the hole is formed.

The plate for widening according to the invention described in claim 7 is formed in a substantially L-shaped cross section by a horizontal portion capable of being continuously provided in the width direction of the deck plate for composite slab and a rising portion rising from one end of the horizontal portion. A length substantially equal to a total length of the synthetic slab deck plate.
According to an eighth aspect of the present invention, there is provided a floor structure comprising the precast composite slab according to any one of the first to sixth aspects.
A building according to the invention described in claim 9 is characterized by being constructed using the floor structure according to claim 8.

According to the precast synthetic slab according to the present invention, the plate for widening, the floor structure using the precast synthetic slab, and the building, the following effects can be obtained.
(1) Through holes for equipment piping can be easily and reliably formed in the widening plates attached (layed) to the both end portions of the synthetic slab deck plate itself without any damage or the like. Therefore, it is possible to construct a precast synthetic slab excellent in workability, economy and quality. In addition, fire resistance specifications such as facility piping are economical and rational because they can be the same specifications as those of precast slabs (reinforcing concrete plates and ALC panels) which have been put into practical use in the past.
(2) By adjusting the width dimension of the horizontal portion of the widening plate, the width adjustment of the synthetic slab deck plate, and hence the precast synthetic slab, can be carried out easily and flexibly. Thus, a flexible and flexible slab structural design can be realized.
(3) The widening plate plays the role of a formwork and also plays a role of protecting the precast composite slab during transportation and the like.

A and B are elevations showing an embodiment of the precast composite slab according to the present invention. A is a left side enlarged view of FIG. 1A, B, B is a right side enlarged view of the same, C is a front view showing a plate for widening of A, D shows a plate for widening of B Front view. A is the schematic which looked at the precast synthetic | combination slab shown to FIG. 1A from the plane direction, B is a B-B arrow arrow end view of A. FIG. In addition, about A, concrete (3) was abbreviate | omitted for convenience of illustration. A to C are elevation views showing variations of the rising portion of the plate for widening used for the precast synthetic slab according to the present invention. A and B are the elevations which showed the example of the precast synthetic slab manufactured using the deck plate for synthetic slabs different from FIG. FIG. 6 is an elevation view showing another embodiment of the precast synthetic slab according to the present invention (half precast synthetic slab).

  Next, an embodiment of a precast composite slab according to the present invention will be described based on the drawings.

The precast composite slab 10 according to the present invention is, as shown in FIGS. 1 and 2, a widening of a substantially L-shaped cross section including horizontal portions 2a and rising portions 2b at both widthwise end portions of the deck plate 1 for composite slabs. A plate 2 is provided over the entire length (span length) of the synthetic slab deck plate 1, and concrete 3 is cast on the surfaces of the synthetic slab deck plate 1 and the widening plate 2.
Although it is omitted for convenience of illustration, inside the concrete 3 there is a crack expansion preventing bar such as welded wire mesh, different diameter rebar, etc. in a part about 30 mm thick from the upper surface of the concrete 3 to prevent cracking. It is arranged.
In short, the precast synthetic slab 10 according to the present invention is constructed by the deck plate 1 for a synthetic slab, the plate 2 for widening, the concrete 3 and the crack expansion preventing bars.

First, the synthetic slab deck plate 1 applied to the present invention will be described.
The deck plate 1 for synthetic slab is formed of a steel plate having peaks and valleys alternately connected via an inclined portion to form a corrugated cross section, and further includes a key groove in the valley and a stepped portion in the inclined portion. Is implemented in The dimensions of the deck plate 1 for synthetic slabs are, for example, a width of about 600 mm (2-crest type), a height (crest height) of about 50 mm, and a width dimension of the top (flat portion) of the crest and valley It is implemented with a plate thickness of about 1.0 to 1.6 mm and a total length (span length) of about 1.8 to 3.6 m.
The form (shape and dimensions) of the synthetic slab deck plate 1 is not limited to this, and the design may be changed appropriately according to the installation area, the installation interval of the support beams, and the structural design such as the required strength. For example, in FIG. 1B, on one side (right side), a deck plate 1 for a single pile type synthetic slab having a width of about 300 mm is used. In FIG. 5A and 5B, the deck plate 11 for synthetic slabs whose height (peak height) is about 75 mm is used.
A composite body in which the deck plate 1 for a synthetic slab described above is connected singly or optionally in the width direction using joints as shown in the illustrated example, as schematically shown in FIG. 3A, A rectangular deck plate 1 for a synthetic slab is configured as viewed in a plane direction.
Incidentally, in FIG. 1A, a composite slab deck plate 1 (about 1.2 m in width and about 2 to 3 m in span) of a composite in which two composite slab deck plates 1 are connected in the width direction is configured.
Hereinafter, when the deck plate 1 for synthetic slabs is referred to, it refers to both of the case of being configured as a single body and the case of being configured as a composite body.

Next, the widening plate 2 will be described.
The widening plate 2 is made of metal, and as described above, is formed into a substantially L-shaped cross section including the horizontal portion 2a and the rising portion 2b, and is substantially equal to the entire length (span length) of the synthetic slab deck plate 1 Implemented in length.
The width dimension of the horizontal part 2a of the plate 2 for widening which concerns on the example of illustration is implemented by about 150 mm, and the height of the standup | rising part 2b is implemented by about 100 mm. In addition, the said dimension is not this limitation, the former should just be 150 mm or more, and the latter should just be 60 mm or more. Incidentally, the plate thickness is substantially the same as the plate thickness of the synthetic slab deck plate 1 used.

The widening plate 2 is formed with a key-like hooking portion 5 at the end in the width direction of the horizontal portion 2a so as to be hooked on the joint portion of the synthetic slab deck plate to prevent shear movement in the width direction. It is done. The hooking portion 5 according to the illustrated example is formed in a key shape so as to closely overlap the upper surface of the left joint portion of the synthetic slab deck plate 1 and to be favorably hooked on the base end portions of the left and right joint portions. . The horizontal portion 2a excluding the hooking portion 5 has a shape that is substantially flush with the flat portion of the valley portion of the deck plate 1 for composite slab when the hooking portion 5 is hooked to the joint portion. It is done.
In the present embodiment, the widening plates 2 and 2 (the hooking portions 5 and 5) provided on the left and right of the synthetic slab deck plate 1 are a pair (from the viewpoint of handling properties and manufacturing costs in addition to workability). Although it is carried out in the form which does not ask what is called directionality of isomorphism and the same size, it is not this limitation.
Further, the shape of the hooking portion 5 is not limited to the key shape, and the design can be changed as appropriate as long as it can be hooked to the joint portion of the synthetic slab deck plate 1.
However, in the case of using the widening plate 2 in which the hooking portion 5 is not formed, positioning and fixing may be performed by joining means such as welding with the synthetic slab deck plate 1. Even in the case where the hooking portion 5 is formed, operation devices such as spot welding for positioning are appropriately performed.

The significance of setting the width dimension of the horizontal part 2a of the widening plate 2 to 150 mm or more is appropriate to the through hole (longitudinal hole) 4 for equipment piping through required for slabs (floors) such as multi-dwelling houses at the relevant part. (See Figure 3). Furthermore, the presence significance of the widening plate 2 is achieved by installing the precast composite slab 10 having the required strength and rigidity by centrally arranging the through holes 4 for the equipment piping through the widening plate 2. It is for the purpose of constructing the business in an extremely rational manner with good sex and economy.
That is, if it is the deck plate 1 for synthetic slabs in which the plate 2 for widening does not exist, about φ125-150 mm is required for the hole diameter of the through-hole 4 for equipment piping through, However, it was necessary to drill it including the inclined portion between the peak and the valley by all means, and it took a lot of time to construct and was very complicated. Also, above all, the precast composite slab constructed by such a complicated construction adversely affects the quality in consideration of a cross section defect or the like caused by drilling a plurality of relatively large through holes 4 in the deck plate 1 itself. There was a fear. In this respect, in the present invention, since the width dimension of the horizontal portion 2a of the plate 2 for widening attached to the deck plate 1 for composite slab 1 is set to 150 mm or more, the horizontal portion 2a penetrates through the equipment piping. The holes 4 can be provided simply and conveniently.
Specifically, a through hole 2c for equipment piping is formed in a predetermined horizontal portion 2a of the widening plate 2, and the through hole 4 to be formed in advance is formed in the through hole 2c. Attach a removable filling member such as a void tube or expanded polystyrene having a predetermined height (more than the height of the rising portion 2b) and cast concrete 3 up (take up) and pull out the filling member after curing of concrete 3 And, the concrete through hole 4 can be easily formed in the relevant part.
Of course, the number and the installation intervals of the through holes 4 for passing the equipment piping are not limited to the example shown in the drawings, and the design can be changed appropriately according to the structural design.

The significance of setting the height of the rising portion 2b of the widening plate 2 to 60 mm or more is that it is usually necessary to secure a concrete thickness of at least 50 mm when constructing the precast composite slab 10 in structural design.
That is, the rising portion 2b of the widening plate 2 for use in the deck plate 1 for synthetic slab according to FIG. 1 needs at least about 100 mm, and for widening used in the deck plate 11 for synthetic slab of the precast synthetic slab 20 according to FIG. The rising portion 12b of the plate 12 needs to be at least about 125 mm. The above-mentioned 60 mm was set because the case where the precast synthetic slab 10 was a so-called half-type precast synthetic slab was considered (see FIG. 6).

Therefore, according to the construction method of the precast synthetic slab 10, in the factory etc., first, the required number of deck plates 1 for the synthetic slab are laid out according to the structural design and the important points are connected, and a rectangular synthetic slab of a predetermined size The deck plate 1 is formed.
Next, a pair of widening plates 2, 2 are arranged at both widthwise end portions of the synthetic slab deck plate 1 over the entire length (span length) of the synthetic slab deck plate 1, and the hooking portion 5 is placed in the deck Hang on the joint of plate 1 and connect (connect). At that time, the stuffing member is attached to the through hole 2 c drilled in the horizontal portion 2 a of the widening plate 2.
Next, after appropriately arranging crack expansion preventing bars such as welding wire mesh etc., after arranging the formwork at both ends in the longitudinal direction of the deck plate 1, concrete 3 is cast. Since the horizontal portion 2a of the widening plate 2 excluding the hooking portion 5 and the flat portion of the valley portion of the synthetic slab deck plate 1 are substantially flush with each other, concrete placing operation is performed in a stable state It can be carried out. In addition, since the rising portions 2b of the widening plates 2 play a role of a mold, both sides of the deck plate 1 in the width direction can perform a good concrete placing operation.
Next, after concrete curing, the formwork is removed (demolded), and the stuffing member is pulled out. Then, a precast composite slab 10 is constructed in which the concrete through holes 4 for equipment piping through are bored in the required portions of both widthwise end portions.

According to the precast composite slab 10, the deck plate 1 for composite slab 1 itself is simply and reliably installed in (the horizontal portion 2a of) the widening plate 2 attached (layed) at both ends without damaging the deck plate 1 itself. The through hole 4 for piping can be formed. Therefore, it is possible to construct a precast synthetic slab 10 excellent in workability, economy and quality, and thus a floor structure and further a building.
In connection with the beam member, by embedding the insert in the precast composite slab, by making the beam and bolt connection, it is possible to eliminate the need for concrete placing work in the field.

FIG. 4 shows a different embodiment of the precast composite slab 10.
The precast composite slab according to the second embodiment is compared with the precast composite slab 10 according to the first embodiment, and the rising portions 2b of the widening plate 2 are not straight but rising of other adjacent widening plates The difference is that it is formed in a concavo-convex shape capable of meshing with the part.
That is, since the widening plates 21a to 23a shown in FIG. 4 are implemented in a concavo-convex shape that can be engaged with the adjacent widening plates 21b to 23b, the precast composite constructed using the widening plates 21a to 23a The slab 10 can be disposed so as to intermesh with the precast composite slab 10 constructed using adjacent widening plates 21b-23b using an adhesive as appropriate. Therefore, in addition to the operation and effect of the first embodiment (see the paragraph [0025]), a floor structure having more excellent strength and rigidity, such as being able to effectively resist the load in the vertical direction acting on the adjacent precast composite slab 10 And finally, we can realize a building.

Although the embodiments have been described above with reference to the drawings, the present invention is not limited to the examples shown in the drawings, and includes a range of design changes and variations of application that those skilled in the art usually perform without departing from the technical concept thereof. I will mention just in case.
For example, as shown in FIG. 6, fixing reinforcing bars 9 are disposed in the valleys of the deck plate 1 for synthetic slabs, and the height of the widening plate 2 etc. shown in FIG. The half-shaped precast composite slab can be easily constructed by using the set widening plate 24.

1 deck plate for synthetic slab 2 widening plate 2a horizontal part 2b uprising part 2c through hole 3 concrete 4 through hole (concrete through hole)
Reference Signs List 5 hooking portion 9 fixing reinforcing bar 10 precast synthetic slab 11 deck plate for synthetic slab 12 widening plate 12a horizontal portion 12b rising portion 20 precast synthetic slab 21a widening plate 21b widening plate 22a widening plate 22b widening plate 23a widening Plate 23b Widening plate 24 Widening plate

Claims (9)

  A widening plate having a substantially L-shaped cross section including horizontal portions and rising portions is provided at both widthwise end portions of the synthetic slab deck plate over the entire length of the synthetic slab deck plate, the synthetic slab deck plate and the widening. Precast composite slab characterized in that concrete is cast on the surface of a support plate.   The widthwise end edge portion of the horizontal portion of the widening plate is characterized in that a hooking portion is formed which is hooked on the joint portion of the deck plate for composite slabs to prevent a shear movement in the width direction. The precast composite slab according to claim 1.   The precast composite slab according to claim 1 or 2, wherein the rising portion of the widening plate is formed in a concavo-convex shape capable of meshing with the rising portion of another adjacent widening plate.   The precast composite slab according to any one of claims 1 to 3, wherein the width dimension of the horizontal portion of the widening plate is set to 150 mm or more.   The precast synthetic slab according to any one of claims 1 to 4, wherein the height of the rising portion of the widening plate is set to 60 mm or more.   The hole for equipment piping through is bored by the horizontal part of the plate for widening, The concrete penetration hole which passes through the said perforation hole is formed, It is characterized by the above-mentioned. Precast composite slab described in Section.   An approximately L-shaped cross section is formed by a horizontal portion capable of being continuously provided in the width direction of the synthetic slab deck plate and a rising portion rising from one end of the horizontal portion, and a length substantially equal to the entire length of the synthetic slab deck plate A plate for widening, characterized in that it comprises:   A floor structure comprising the precast composite slab according to any one of claims 1 to 6.   A building constructed using the floor structure according to claim 8.

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