JP3626705B2 - Construction method of floor slab in building and its floor slab structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a floor slab construction method and a floor slab structure for forming a part of a concrete frame of a building.
[0002]
[Prior art]
In a reinforced concrete building or the like, it has been conventionally known to use a “waffle slab” as a concrete floor slab of a concrete frame in order to construct a large-span living space without columns, beams and intermediate walls.
[0003]
[Problems to be solved by the invention]
By the way, the “waffle slab” has a large number of ribs to be a small beam and is formed in a lattice shape, and the effective floor height of the living space is higher than a normal floor slab having a large beam and a small beam. On the other hand, the construction of this “waffle slab” requires a special form of temporary formwork, so not only is the construction of the temporary formwork troublesome, but also the reinforcement Since there are many intersections, the structure of the bar arrangement becomes complicated, and it takes time to complete the work. In addition, the temporary formwork with a complicated structure is dismantled after the concrete frame is completed by placing concrete. However, there is a problem that the formwork is not used as a functional member of the building after that, and as a whole, the cost is greatly increased.
[0004]
Therefore, the present invention greatly simplifies the construction of the formwork and bar arrangement while taking advantage of the “waffle slab” and allows the formwork panel for the floor slab to be used as it is as an insulation and sound insulation panel for the floor slab. The main object of the present invention is to provide a method for constructing a floor slab in a new building and its floor slab structure, which can greatly reduce the construction cost.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the invention of the floor slab construction method according to claim 1 is characterized in that a plurality of vertical and horizontal grooves extending in the vertical and horizontal directions are formed on the upper surface of the flat substrate whose lower surface extends over the entire surface, A process of assembling a heat-insulated form panel made of a synthetic resin low foam material to a floor slab forming part of a temporary form form, which has a large number of ribs surrounded by vertical and horizontal concave grooves and is formed in an upper surface lattice shape; The rebar assemblies formed by removing a part of the upper rebar and having a plurality of rebar removal portions each having an open upper surface are disposed in the vertical and horizontal grooves, respectively, they rebar assembly, the vertical and the reinforcement deleting unit, and is disposed respectively at the intersections of the lateral grooves, the step of their rebar assembly and so as to intersect substantially on the same plane by the intersection, the Reinforcing bar assemblies placed in vertical and horizontal grooves A step of Tightened slab rebar integrally with the surface, the concrete and pouring directly into the adiabatic frame panel, the mold frame panel integrated with the concrete with rebar assembly and slab rebar, wherein the mold frame panel And a step of forming a floor slab integrated with a heat insulating material in which the entire lower surface of the concrete is covered with a substrate, and according to such a feature, rebar arrangement and formwork are greatly simplified, The workability can be improved and the construction cost can be greatly reduced. In addition, the heat-insulated form panel made entirely of a synthetic resin low foam material has a flat substrate over the entire bottom surface, and can be used as it is as a heat insulation and sound insulation member that covers the entire bottom surface of the concrete floor slab. It is possible to reduce the construction cost for heat insulation and sound insulation of the building, and the heat insulation panel can easily form a plurality of small beams integrally with the concrete floor slab to increase the strength of the floor slab. The floor slab span can be longer than the conventional one, and the floor height can be increased.
[0006]
In order to achieve the above object, the invention of the method for constructing a floor slab according to claim 2 is the one according to claim 1, wherein the reinforcing bar assembly is formed in a truss structure, and the reinforcing bar deletion part is the reinforcing bar. It is characterized in that it is formed in a V-shape with an open top by removing a part of the upper rebar of the assembly. According to this feature, the same effect as the invention of claim 1 can be obtained. The strength of the reinforcing bar assembly itself can be increased.
[0007]
Furthermore, in order to achieve the object, the invention of the method for constructing a floor slab according to claim 3 is the one according to claim 1, wherein the reinforcing bar assembly is manufactured in advance in a factory or the like other than the construction site. According to this feature, the same effect as that of the first aspect of the invention can be obtained, and further, the time required for the bar arrangement work at the construction site can be further shortened.
[0008]
Furthermore, in order to achieve the above object, an invention of a floor slab construction method according to claim 4 is the one according to any one of claims 1 to 3, wherein the vertical and horizontal surfaces are formed on the bottom surface of the intersection. A boss for receiving the reinforcing bar assembly suspended from the bottom surface in the groove and extending vertically and horizontally is projected at the intersection, and the lower reinforcing bar of the reinforcing bar assembly is placed on the boss. It is characterized by that.
[0009]
Furthermore, in order to achieve the above object, the invention of the floor slab structure according to claim 5 is composed of a low foam material of synthetic resin as a whole, and a large number of the bottom surface extends vertically and horizontally on the top surface of the flat substrate over the entire surface. By removing a part of the upper rebar and the heat-insulating formwork panel that is formed in the shape of an upper surface lattice having a plurality of ribs surrounded by the vertical and horizontal concave grooves, and the vertical and horizontal concave grooves A plurality of reinforcing bar deletion portions that are formed and have their upper surfaces opened are provided at predetermined intervals, and these reinforcing bar deletion portions are located at the intersections of the vertical and horizontal concave grooves of the heat insulating form panel. Thus, a plurality of reinforcing bar assemblies that are arranged so as to form a substantially single plane in the vertical and horizontal concave grooves, and the upper surfaces of the reinforcing bar assemblies respectively disposed in the vertical and horizontal concave grooves. It is pouring directly slab rebar that is Tightened integrally with the heat insulating formwork panel, the mold Panel, integral with the slab rebar and rebar assembly and a concrete molding the heat insulator integrated floor slab, are characterized in that the entire lower surface of the concrete is covered with the substrate of the heat-insulating formwork panels, According to such a feature, the structure and assembly of the floor slab forming part of the concrete mold can be simplified, and as a result, it can contribute to the cost reduction of the concrete mold work, and the whole is made of a low foam material of synthetic resin. The heat-insulated form panel has a flat substrate over the entire bottom surface, and can be used as it is as a heat insulation and sound insulation member that covers the entire bottom surface of the concrete floor slab, so that the heat insulation and sound insulation performance of the building can be improved. In addition, the heat insulation panel can integrally form a plurality of beam beams on the concrete floor slab to increase the strength of the floor slab. Bets can be, the span of the direction of the floor slab can take longer than the conventional, yet it is possible to provide a superior building high floor height quality at low cost.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described based on examples of the present invention shown in the accompanying drawings. 1 is a partially broken perspective view of a concrete frame provided with a floor slab of the present invention, FIG. 2 is a plan view taken along the arrow 2 in FIG. 1, and FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 4 is a perspective view of the heat insulation panel, FIG. 5 is a side view and a plan view of the reinforcing bar assembly, FIG. 6 is an enlarged view of a portion surrounded by an imaginary line 6 in FIG. 2, and FIG. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 6, FIG. 9 is an enlarged cross-sectional view taken along line 9-9 in FIG. 2, and FIG. FIG.
[0011]
The floor slab Sf constituting the horizontal frame portion of the concrete frame F includes a formwork panel Pf made of a heat insulating material and the reinforcing bar assembly according to the present invention, which is laid in the vertical and horizontal concave grooves 2 and 3 of the formwork panel Pf. A solid Ra, a slab reinforcing bar Rs connected to the reinforcing bar assembly Ra, and a concrete Co placed on the formwork panel Pf are configured.
[0012]
The formwork panel Pf is configured by integrally connecting a plurality of formwork units Uf modularized to a predetermined size vertically and horizontally on one plane. Each mold unit Uf is integrally molded with a synthetic resin material, for example, a low-foam molding material of polystyrene at a factory or the like.
[0013]
As shown in FIGS. 1 and 4, a formwork panel Pf configured by coupling a plurality of formwork units Uf has a plurality of vertical grooves 2 and horizontal grooves 3 intersecting the upper surface of the rectangular substrate 1 in the vertical and horizontal directions. And a plurality of trapezoidal ribs 4 surrounded by the vertical and horizontal concave grooves 2 and 3 and the vertical concave grooves 2 and the horizontal concave grooves surrounded by the four corner portions of the ribs 4. 3 is a communicating groove 5 that communicates the longitudinally recessed groove 2 and the laterally recessed groove 3. A boss 6 that receives a reinforcing bar assembly Ra, which will be described later, projects from the bottom surface of the intersecting portion 5. As a whole, the upper surface of the formwork panel Pf is formed in a lattice shape.
[0014]
As shown in FIGS. 4 and 7, each modular formwork unit Uf is configured by integrally joining a pair of rectangular unit halves Uf-h. Specifically, the unit half Uf-h has a rectangular shape having three ribs 4 surrounded by the vertical concave grooves 2 and the horizontal concave grooves 3 on the substrate 1 and three half ribs 4h arranged in parallel therewith. The formwork unit Uf is formed in a quadrangular shape by integrally joining the end faces of the pair of rectangular unit halves Uf-h on the half rib 4h side by the fastening tool 7. The binding tool 7 is formed in a “wash” shape, and an insertion point having a cross-sectional shape is formed on the lower edge of each end. And in order to couple | bond a pair of unit half Uf-h using this binding tool 7, the said binding tool 7 is straddled on the upper surface of the part which the rib half 4h mutually abuts, and the pair of said difference If the insertion point is inserted into the rib 4, they can be joined together. At this time, since the mold unit Uf is made of low-foam polystyrene and is soft, it can be easily inserted and connected to the rib 4 at the insertion point. The formwork panel Pf is configured by integrally connecting the edges of the substrates 1 of the formwork units Uf arranged in parallel on one plane in the vertical and horizontal directions by connecting pins 8.
[0015]
The pair of unit halves Uf-h constituting the mold unit Uf may be formed by only the three ribs 4 on the substrate 1 by omitting the half ribs 4h. In this case, the binding tool 7 is not required to connect the formwork units Uf.
[0016]
Next, a description will be given of the configuration of the reinforcing bar assembly Ra according to the present invention that is laid in the vertical concave groove 2 and the horizontal concave groove 3 of the formwork panel Pf from above, respectively. As shown in FIGS. 5 (a) and 5 (b), the truss structure is configured in a side view, and a V-shaped reinforcing bar removing portion 10 having an open top surface is formed at a predetermined interval in the longitudinal direction. Specifically, the reinforcing bar assembly Ra includes an intermediate reinforcing bar 12 bent in a corrugated shape in the vertical direction, and a plurality of (three) peak parts of the intermediate reinforcing bar 12 with a predetermined interval (between adjacent mountains). Are formed by a plurality of linear upper reinforcing bars 13 welded to each other at intervals, and a single linear lower reinforcing bar 14 welded to a plurality of valleys of the intermediate reinforcing bars 12. The intermediate part reinforcing bar 12 has its both ends cut at the troughs to form the connecting end 15 of the reinforcing bar assembly Ra. On the other hand, one end (the right end in FIG. 5) of the lower reinforcing bar 14 is linearly extended outward from the welded joint with the intermediate reinforcing bar 12 to form a connecting extension 16. Then, a plurality of reinforcing bar assemblies Ra are connected in series by superimposing the connecting end 15 of the intermediate reinforcing bar 12 of another reinforcing bar assembly Ra on the connecting extension 16 and fastening them together by a binding wire 17. (See FIGS. 5 and 9).
[0017]
A slab reinforcing bar Rs is integrally bonded to the upper surface of the reinforcing bar assembly Ra laid in the plurality of vertical and horizontal concave grooves 2 and 3 of the formwork panel Pf. This slab reinforcing bar Rs is formed into a mesh by knitting vertical and horizontal reinforcing bars vertically and horizontally (see FIG. 1).
[0018]
Next, the case where the formwork panel Pf configured as described above is incorporated into a temporary concrete formwork Fc will be described. As shown in FIG. 10, left and right wall molds assembled with a living space L open. The frame 20 includes outer wall molds 20i and 20o that are confronted with a concrete placement space, and a frame panel Pf is bridged between the upper edges of the inner wall mold 20i. In addition, the upper end of the outer wall mold 20o forms a concrete barrier plate that extends upward from that of the inner wall mold 20i and is cast.
[0019]
As shown in FIG. 10 (a), the formwork panel Pf is formed by connecting a plurality of formwork units Uf integrally on one plane as described above so as to match the floor area of the living space L. It is assembled to the floor slab forming part of the concrete formwork Fc. The flat lower surface (ceiling surface) of the formwork panel Pf is supported by a plurality of pipe supports 23 via the butter material 22.
[0020]
On the upper surface of the formwork panel Pf, the reinforcing bar assembly Ra and the slab reinforcing bar Rs according to the present invention are assembled following the bar arrangement. That is, one reinforcing bar assembly Ra made in a factory or the like other than the construction site is first laid in a plurality of vertical concave grooves 2 (or horizontal concave grooves 3) on the upper surface of the formwork panel Pf. In this embodiment, as shown in FIG. 10 (b), the two reinforcing bar assemblies Ra are connected in series, and the connecting end 15 and the connecting extension 16 are superposed on each other in the manner described above. Then, it is fastened by a binding wire 17. Further, the V-shaped reinforcing bar removing portion 10 provided in the reinforcing bar assembly Ra is disposed on the boss 6 at the intersection 5 of the vertical and horizontal concave grooves 2 and 3.
[0021]
In addition, as shown in FIG.10 (b), the unnecessary connection extension part 16 of the reinforcing bar assembly Ra which protrudes outward from the span of the floor slab Sf is cut off and removed.
[0022]
Next, the other reinforcing bar assembly Ra, which is also manufactured in a factory or the like, is laid in the plurality of horizontal concave grooves 3 (or vertical concave grooves 2) in the same manner as the one reinforcing bar assembly Ra. And the V-shaped reinforcement removal part 10 of this other reinforcement assembly Ra is arrange | positioned in the cross | intersection part 5 of the vertical and horizontal concave grooves 2 and 3. FIG. Therefore, in a state where the one and the other reinforcing bar assemblies Ra and Ra are laid vertically and horizontally in the longitudinal and lateral concave grooves 2 and 3 of the formwork panel Pf, as shown in FIG. 6 and FIG. The V-shaped reinforcing bar removing portions 10 intersect each other and can be arranged on substantially the same plane at the intersecting portions 5 of the longitudinal and lateral concave grooves 3, and the above-mentioned formwork of one and the other reinforcing bar assemblies Ra and Ra. The bar arrangement work to the vertical and horizontal concave grooves 2 and 3 of the panel Pf becomes extremely easy.
[0023]
Next, a net-like slab reinforcing bar Rs is superimposed on one and the other reinforcing bar assemblies Ra and Ra, which are arranged in the vertical and horizontal concave grooves 2 and 3 of the formwork panel Pf. Are united together.
[0024]
As described above, when the reinforcing bar assembly Ra and the slab reinforcing bar Rs are arranged on the formwork panel Pf, as shown in FIG. 10 (c), concrete Co is placed on the formwork panel Pf. The concrete Co is filled between the formwork panel Pf and the reinforcing bar, and the upper surface thereof is leveled by a normal leveling operation. When the concrete Co is cured and its strength and curing are sufficiently confirmed, the temporary concrete formwork Fc is dismantled. That is, the butter material 22, the pipe support 23, and the wall formwork 20 are disassembled, but the formwork panel Pf is integrally coupled with the concrete Co and is used as it is as a heat insulation and sound insulation member for the floor slab Sf as it is. .
[0025]
Thus, in the concrete floor slab Sf formed as described above, a plurality of strip beams are easily formed integrally by the plurality of ribs 4 of the formwork panel Pf, and the strength thereof is further enhanced. It is possible to form a long-span living space L without columns, intermediate walls, and large beams. Further, since there are no large beams, the effective floor height can be increased.
[0026]
As mentioned above, the thing of the said Example has the following advantages in constructing a building. (1) In forming a concrete frame, the structure of the temporary concrete formwork Fc, particularly the floor slab formwork, is simplified, and the construction cost of the formwork can be greatly reduced.
(2) Since the formwork panel Pf and the reinforcing bar assembly Ra are manufactured at factories other than the construction site, the construction period can be shortened.
(3) Although the formwork panel Pf is a part of the concrete formwork Fc, it is used as it is as a heat insulation and sound insulation member for the floor of the building, so the structure of the concrete formwork is simplified and its dismantling is also possible It becomes easy. Furthermore, there is no need for heat insulation and sound insulation members on the floor separately, and a building with excellent heat insulation and sound insulation functions can be provided.
(4) The formwork panel Pf is formed of a synthetic resin foam such as polystyrene, so it is extremely lightweight, easy to process, easy to handle, and can reduce the weight of the building itself. .
(5) When assembling the formwork panel Pf, it can be carried out with the fastening tool 7 and the connecting pin 8, and special work such as welding is unnecessary.
(6) The formwork panel Pf can integrally form a plurality of small beams of the concrete floor slab Sf, and the strength thereof can be increased, so that the span of the floor slab Sf is made higher than that of the conventional one. It can be long and is suitable as a floor slab Sf of a building by a frame wall construction method.
[0027]
As mentioned above, although the Example of this invention was described, this invention is not limited to the Example, A various Example is possible within the scope of the present invention.
[0028]
For example, in the said Example, although a formwork panel is formed with the low foaming material of polystyrene, you may form this with another synthetic resin material of the same effect. In the above embodiment, the reinforcing bar assembly is formed in a truss structure, but it may be formed in another structure, and the reinforcing bar deletion part is formed in a V-shaped outside, a U-shaped or other shape. May be.
[0029]
【The invention's effect】
As described above, according to the first aspect of the present invention, in the construction method of the floor slab, it is possible to greatly simplify the bar arrangement and the formwork, and to improve the workability thereof, thereby significantly increasing the construction cost. Reduction can be achieved. In addition, the heat-insulated form panel made entirely of a synthetic resin low foam material has a flat substrate over the entire bottom surface, and can be used as it is as a heat insulation and sound insulation member that covers the entire bottom surface of the concrete floor slab. The construction cost for heat insulation and sound insulation of the building can be reduced, and the heat insulation formwork panel can easily form a plurality of beams integrally on the concrete floor slab, and the floor slab strength can be increased. The floor slab span can be longer than the conventional one, and the floor height can be increased.
[0030]
According to the second aspect of the invention, in the floor slab construction method, the same effect as that of the first aspect of the invention can be obtained, and the strength of the reinforcing bar assembly itself can be increased.
[0031]
Furthermore, according to the third aspect of the invention, in the floor slab construction method, the same effect as that of the first aspect of the invention can be achieved, and further, the bar arrangement work time at the construction site can be further shortened. be able to.
[0032]
According to the fourth aspect of the present invention, the reinforcing bar set is vertically and horizontally laid on the bottom surface of the intersecting portion of the vertical and horizontal concave grooves on the upper surface of the substrate so as to float in the vertical and horizontal concave grooves from the bottom surface. A boss for receiving a three-dimensional object at the intersecting portion protrudes, and the reinforcing bar assembly can be placed on the boss.
[0033]
Furthermore, according to the invention described in claim 5, in the structure of the floor slab, the structure and assembly of the floor slab forming part of the concrete formwork are simplified, and as a result, it contributes to the cost reduction of the concrete formwork. In addition, the heat-insulated form panel, which is made entirely of synthetic resin low foam material, has a flat substrate on the entire bottom surface, and is used as it is as a heat insulation and sound insulation member that covers the entire bottom surface of the concrete floor slab. It is possible to improve the heat insulation and sound insulation performance of the building, and further, the heat insulation formwork panel can integrally form a plurality of small beams on the concrete floor slab, and can increase the strength of the floor slab, The span of the floor slab in this direction can be made longer than that of the conventional one, and an excellent building with high floor height can be provided at low cost.
[Brief description of the drawings]
FIG. 1 is a partially broken perspective view of a concrete frame provided with a floor slab of the present invention. FIG. 2 is a plan view taken along line 2 in FIG. 1. FIG. 3 is a sectional view taken along line 3-3 in FIG. FIG. 5 is a side view and a plan view of a reinforcing bar assembly. FIG. 6 is an enlarged view of a portion surrounded by an imaginary line in FIG. 6. FIG. 7 is a sectional view taken along line 7-7 in FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 6. FIG. 9 is an enlarged cross-sectional view taken along line 9-9 in FIG. 2. FIG. 10 is a diagram showing a construction sequence of a concrete floor slab.
2 ... Vertical groove 3 ... Horizontal groove 4 ... Rib 10 ... Rebar removal part
13 .... Upper rebar
14 ... Lower Reinforcement Co ... Concrete Fc ... Temporary formwork (concrete formwork)
Pf ... Formwork panel Ra ... Reinforcing bar assembly
Rs ... Slab rebar

Claims (5)

The upper surface of the substrate (1) whose bottom surface is flat is surrounded by a large number of vertical and horizontal grooves (2) and horizontal grooves (3) extending vertically and horizontally, and the vertical and horizontal grooves (2, 3). A process of assembling a heat-insulating form panel (Pf) made of a low foam material of synthetic resin, which has a large number of ribs (4), and is made of a synthetic resin low foam material, to a floor slab forming part of a temporary form form (Fc) When,
A reinforcing bar assembly (Ra) formed by deleting a part of the upper reinforcing bar (13) and having a plurality of reinforcing bar deleting parts (10) each having an open upper surface is separated from the longitudinal groove (2) and the lateral groove Each of the reinforcing bar assemblies (Ra) is arranged in the concave groove (3), and in this case, the reinforcing bar removal part (10) is arranged at the intersection (5) of the vertical and horizontal concave grooves (2, 3). And arranging the reinforcing bar assemblies (Ra) to intersect each other on the substantially same plane at the intersection (5);
A step of integrally bonding a slab reinforcing bar (Rs) to an upper surface of a reinforcing bar assembly (Ra) disposed in each of the vertical concave groove (2) and the horizontal concave groove (3);
Concrete (Co) is directly placed on the heat insulating formwork panel (Pf), and the formwork panel (Pf) is integrated with the concrete (Co) together with the rebar assembly (Ra) and the slab rebar (Rs) , Forming a floor slab (Sf) integrated with a heat insulating material in which the entire lower surface of the concrete (Co) is covered with the substrate (1) of the formwork panel (Pf). Floor slab construction method in Japan. The rebar assembly (Ra) is formed in a truss structure, and the rebar removal portion (10) has a V-shape with an open top by removing a part of the upper rebar (13) of the rebar assembly (Ra). The method for constructing a floor slab in a building according to claim 1, wherein the floor slab is formed as follows. The method for constructing a floor slab in a building according to claim 1, wherein the reinforcing bar assembly (Ra) is manufactured in advance in a factory or the like other than a construction site. On the bottom surface of the intersecting portion (5), the reinforcing bar assembly (Ra) suspended from the bottom surface in the vertical and horizontal concave grooves (2, 3) and laid vertically and horizontally is received by the intersecting portion (5). A boss (6) for projecting is provided, and the lower reinforcing bar (14) of the reinforcing bar assembly (Ra ) is placed on the boss (6). The construction method of the floor slab in the building in any one of. A large number of vertical and horizontal grooves (2) and horizontal grooves (3) extending vertically and horizontally on the upper surface of the substrate (1) whose entire surface is made of a synthetic resin low foam material and whose bottom surface is flat across the entire surface, and the length and width thereof. A heat-insulated form panel (Pf) having a large number of ribs (4) surrounded by the concave grooves (2, 3) and formed in an upper surface lattice shape;
It has a plurality of reinforcing bar deletion parts (10) formed by deleting a part of the upper reinforcing bar (13) and each having an open upper surface at predetermined intervals, and these reinforcing bar deletion parts (10) The heat insulation form panel (Pf) is positioned substantially at the intersection (5) of the vertical and horizontal concave grooves (2, 3) so as to be substantially within the vertical and horizontal concave grooves (2, 3). A plurality of reinforcing bar assemblies (Ra), which are cross-arranged to form a plane;
Slab reinforcing bars (Rs) integrally bonded to the upper surface of the reinforcing bar assembly (Ra) disposed in the vertical concave grooves (2) and the horizontal concave grooves (3),
The floor slab (Sf) integrated with the heat insulating material is integrated with the form panel (Pf) , the slab reinforcing bar (Rs) and the reinforcing bar assembly (Ra). With concrete to be molded (Co),
A floor slab structure in a building, characterized in that the entire lower surface of the concrete (Co) is covered with the substrate (1) of the heat insulating form panel (Pf).

Images