JP2006214212A - Floor slab construction method and form panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce construction cost by eliminating conventional marking work on a concrete placed surface when arranging slab reinforcing bars, to greatly simplify the construction of a concrete floor slab. <P>SOLUTION: This floor slab construction method for a building comprises arranging the slab reinforcing bars R on a form panel P and placing concrete C thereon to form the floor slab S. The form panel P has a plurality of rib bodies integrally provided in lattice on the upper face of a base plate 1 with longitudinal and cross recessed grooves 3, 4. A pitch 2p between the rib bodies 2 is almost equal to each of pitches 10p, 11p between longitudinal and cross bars 10, 11 of the slab bars R braided in lattice. An intersection fastening portion 12 between the slab bars R is arranged at the center of a cross intersection portion between the longitudinal and cross recessed groove 3, 4 of the form panel P. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for constructing a floor slab of a building having a concrete frame and a form panel used for the method.

Conventionally, in a reinforced concrete building or the like, a “waffle slab” is known as a concrete floor slab of a concrete frame (see Non-Patent Document 1).
Book “Architecture Terminology” Pocket Book, Structure, June 30, 1984 Issued by Maruzen Co., Ltd.

  By the way, this “waffle slab” has a large number of ribs with rib bodies and is formed in a lattice shape, which has the advantage that the effective floor height can be increased compared to ordinary concrete floor slabs with large beams and small beams. However, the construction of this “waffle slab” requires a special form of temporary formwork, so the construction of the temporary formwork is cumbersome. Therefore, the structure of the bar arrangement is complicated, and it takes time to complete the work.Furthermore, the temporary formwork with a complicated structure is disassembled after the concrete frame is completed by placing concrete, so the dismantling work is troublesome. Moreover, since the temporary formwork is not used as a functional member of the building after that, there is a problem that the cost is increased as a whole.

  The present invention has been made in view of such circumstances, and while making use of the advantages of `` waffle slab '', the construction of the formwork and bar arrangement is simplified and the formwork panel for the floor slab is insulated from the floor slab, It is an object of the present invention to provide a novel floor slab construction method that can be used as it is as a sound insulation panel and a formwork panel used in the method.

In order to achieve the above-mentioned object, the invention according to claim 1 forms a concrete floor slab by arranging a slab reinforcing bar on a formwork panel made of a heat insulating material and placing concrete thereon. A method for constructing a floor slab in a building,
The formwork panel is provided with a plurality of quadrangular prism-shaped rib bodies that are vertically erected on a flat upper surface of a plate-like substrate and are vertically erected in a lattice shape. The pitch between the ribs of the slab reinforcement is substantially equal to the pitch between the vertical and horizontal reinforcements of the slab reinforcements assembled in a lattice pattern. The cross binding portion is characterized in that it is arranged at substantially the center of the cross-shaped cross portion of the vertical and horizontal grooves of the formwork panel. .

In order to achieve the above object, the invention according to claim 2 is a formwork panel used in the construction method of the floor slab,
A plate-like substrate and a plurality of square pillar-shaped rib bodies standing vertically in a lattice shape with vertical and horizontal grooves and horizontal grooves on the flat upper surface of the substrate. The pitch between the bodies is characterized by being substantially equal to the pitch between the vertical and horizontal reinforcing bars of the slab reinforcing bars assembled in the lattice shape.

  In order to achieve the above object, the invention described in claim 3 is characterized in that, in the invention described in claim 2, the rib body has a rectangular column shape having the same vertical and horizontal widths from the upper end to the lower end.

  According to the first aspect of the present invention, the pitch between the plurality of ribs of the formwork panel is substantially equal to the pitch between the vertical and horizontal rebars of the slab reinforcement assembled in a lattice pattern, and the formwork panel On top of that, when arranging slab reinforcing bars, each cross-tightening portion of the slab reinforcing bars can be arranged in the approximate center of the cross-shaped crossing portion of the vertical concave groove and horizontal concave groove of the formwork panel, respectively. The conventional ink marking work performed on the concrete placing surface can be omitted, the construction of the concrete floor slab can be greatly simplified, and the construction cost can be reduced.

  Moreover, according to invention of Claim 2, the formwork panel which can simplify the construction of the said concrete floor slab can be provided.

  Further, according to the third aspect of the present invention, since the plurality of rib bodies of the formwork panel are quadrangular columns having the same vertical and horizontal widths from the upper end to the lower end, the capacity of the concrete filled in the formwork panel is reduced. The rigidity of the concrete floor slab can be increased by equalizing in the thickness direction of the formwork panel.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below based on examples of the present invention illustrated in the accompanying drawings.

  1 is a partially broken perspective view of a concrete frame provided with a floor slab, FIG. 2 is a perspective view of a formwork panel and a slab reinforcing bar, FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. Is a sectional view taken along line 4-4 in FIG. 1, FIG. 5 is a partially enlarged view taken along arrow 5 in FIG. 1, FIG. 6 is a sectional view taken along line 6-6 in FIG. It is a figure which shows the construction order of a floor slab.

  The floor slab S constituting the horizontal frame portion of the concrete frame includes a formwork panel P according to the present invention composed of a heat insulating panel, a slab rebar R arranged on the formwork panel P, and a strike on the formwork panel P. It consists of concrete C to be installed.

  The formwork panel P is configured by integrally connecting a plurality of panel units Pu modularized to a predetermined size vertically and horizontally on one plane. Each panel unit Pu is integrally formed of a heat insulating material, for example, a synthetic resin material such as polystyrene.

  As most clearly shown in FIG. 2, each panel unit Pu includes a rectangular substrate 1 and a plurality of square columnar beams, ie, rib bodies, which are erected on a flat upper surface of the substrate 1 in a lattice shape. These rib bodies 2 are surrounded by a plurality of vertical concave grooves 3 and horizontal concave grooves 4 that intersect vertically and horizontally, and the vertical concave grooves 3 and horizontal concave grooves 4. The cross-shaped intersection 5 is surrounded by four adjacent rib bodies 2. Each pitch 2p of the plurality of ribs 2 is the same as the pitch between the longitudinal grooves 3 and the lateral grooves 4. The rib bodies 2 have the same vertical and horizontal widths from the lower end to the upper end, and are formed in a square column shape. The vertical concave grooves 3 and the horizontal concave grooves 4 surrounding the rib bodies 2 are also The groove width is the same from the lower end to the upper end.

  Thus, the panel unit Pu is modularized in a relatively small area so as to be able to deal with a floor area with a relatively small floor space such as a room of a one-room apartment without waste by dealing with waste. Length 1,800 mm, width 900 mm, thickness 120 mm, rib body width 90 mm, height 70 mm, vertical and horizontal concave groove width 90 mm, pitch between rib bodies 2 (vertical and horizontal concave groove pitch) 180 mm Is done.

  As shown in FIG. 1, a modularized panel unit Pu is formed by arranging a plurality of them on a single plane and connecting their connecting edges together with an appropriate fastener to form a form panel P. .

  On the formwork panel P, a slab reinforcing bar R is arranged. This slab reinforcing bar R is conventionally known and is formed by knitting a plurality of vertical and horizontal reinforcing bars 10..., 11..., And the intersection of the vertical and horizontal reinforcing bars 10. .. Are connected to each other to form a cross-linking portion 12. As clearly shown in FIG. 5, the pitch 10p between the vertical reinforcing bars 10 of the slab reinforcing bars R and the pitch 11p between the horizontal reinforcing bars 11 are the pitches between the rib bodies 2 of the panel unit Pu. 2p (the pitch between the vertical and horizontal concave grooves 3 and 4) is substantially the same. As described later, when the slab reinforcing bar R is arranged on the formwork panel P, a plurality of vertical reinforcing bars 10 are arranged. And the horizontal reinforcing bars 11 are positioned in the middle of the longitudinal concave grooves 3 and the horizontal concave grooves 4 of the formwork panel P, so that each of the cross-tightening portions 12 of the vertical and horizontal reinforcing bars 10. It can be arranged at the center of each cross-shaped intersection 5 of the groove 3.

  Next, with reference to FIG. 7, a case where the formwork panel P configured as described above is incorporated into a temporary concrete formwork Fc will be described. The wall formwork 20 assembled with a living space open is as follows. Outer molds 20i and 20o are provided inside the concrete placement space, and the mold panel P comprising a plurality of panel units Pu is disposed between the upper edges of the inner wall mold 20i. Is bridged and assembled. The upper end of the outer wall mold 20o forms a concrete C dam plate that extends upward from the upper end of the inner wall mold 20i.

  As shown in FIG. 7A, the formwork panel P is formed by connecting a plurality of panel units Pu integrally on one plane so as to match the floor area of the living space. It is assembled to the floor slab forming part of the frame Fc. The formwork panel P is supported by a plurality of pipe supports 23 via the flap material 22.

  Next, as shown in FIG.7 (b), the slab reinforcement R (a conventionally well-known thing) is arranged on the upper surface of the formwork panel P. Next, as shown in FIG. At this time, by configuring the formwork panel P as described above, the plurality of vertical rebars 10 and the horizontal rebars 11 of the slab rebar R are formed into the vertical concave grooves 3 and the horizontal concave grooves 4 of the formwork panel P, respectively. Are arranged in each. At this time, the cross-binding portion 12 of the vertical reinforcing bars 10 and the horizontal reinforcing bars 11 is necessarily in the center of the cross-shaped crossing portion 5 of the vertical reinforcing bars 10 and the horizontal reinforcing bars 11 surrounded by the four rib bodies 2. (See FIGS. 5 and 6).

  Therefore, such bar arrangement does not require the conventional inking operation for arranging the slab reinforcing bar R on the formwork panel P, and the slab reinforcing bar R is placed at a predetermined position of the formwork panel P. Can be accurately arranged.

  As described above, when the arrangement of the slab reinforcing bars R on the formwork panel P is completed, the concrete C is placed on the formwork panel P as shown in FIG. The concrete C is filled between the formwork panel P and the slab rebar R, and the upper surface thereof is leveled by a normal leveling operation.

  Since the plurality of vertical and horizontal concave grooves 3... 4 of the formwork panel P are formed to have the same width in the vertical and horizontal directions from the upper end to the lower end thereof, the concave grooves 3. By filling the concrete C, the filling amount of the concrete C is equalized in the height and lateral direction of the floor slab S, and thereby the strength of the concrete floor slab is increased over the entire area.

  When the concrete C is hardened 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 dismantled and removed, but the formwork panel P is permanently combined with the concrete C as a heat insulation and sound insulation member for the concrete floor slab S. used.

  Thus, the above embodiment has the following advantages.

  (1) The panel unit Pu constituting the formwork panel P is modularized to a relatively small area (1800 mm x 900 mm), so that it can be used as a floor space with a relatively small floor space such as a room in a studio apartment. Can be handled without waste.

  (2) The concrete slab S can be made thin (250 mm), the floor height of the building can be lowered, the number of floors of the building can be reduced, and sufficient sound insulation and rigidity can be ensured.

  (3) Since the ribs, that is, the pitches 2p of the small beams 2 are equal to the pitches 10p, 11p of the slab reinforcement R, the workability of the concrete floor slab S is greatly simplified. The

  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.

Partially broken perspective view of a concrete frame with a floor slab Perspective view of formwork panel and slab rebar Sectional drawing which follows the 3-3 line of FIG. Sectional view along line 4-4 in FIG. Partial enlarged view of arrow 5 in FIG. Sectional drawing which follows the 6-6 line of FIG. Diagram showing the construction sequence of concrete floor slabs

Explanation of symbols

1 .... Substrate 2 .... Rib body 2p ... Pitch (Rib body 2)
3 ····························································································· 10 of)
11 ·········· Rebar 11p ··· Pitch (of the horizontal rebar)
12 ・ ・ ・ ・ ・ ・ Cross joint C ・ ・ ・ ・ ・ ・ Concrete P ・ ・ ・ ・ ・ ・ Form panel R ・ ・ ・ ・ ・ ・ Slab rebar S ・ ・ ・ ・ ・ ・ Concrete floor slab

Claims (3)

A floor slab in a building in which a concrete floor slab (S) is formed by placing a slab rebar (R) on a formwork panel (P) made of heat insulating material and placing concrete (C) on the slab rebar (R). The construction method of
The said formwork panel (P) is a square which is vertically erected in a lattice shape with vertical and horizontal grooves (3) and horizontal grooves (4) formed vertically and horizontally on a flat upper surface of a plate-like substrate (1). A plurality of columnar rib bodies (2) are provided, and the pitch (2p) between the rib bodies (2) is such that the vertical reinforcing bars (10) and the horizontal reinforcing bars (11) of the slab reinforcing bars (R) assembled in a lattice shape. When the slab reinforcing bar (R) is arranged on the formwork panel (P), the cross joint portion (12) of the slab reinforcing bar (R) is set to be substantially equal to the pitch (10p, 11p). A method for constructing a floor slab, characterized in that the floor slab is arranged at substantially the center of the cross-shaped intersection (5) of the longitudinal groove (3) and the lateral groove (4) of the formwork panel (P). A formwork panel used in the floor slab construction method,
A plate-like substrate (1), and a rectangular columnar shape that is vertically erected in a lattice shape with a vertical concave groove (3) and a horizontal concave groove (4) formed vertically on the flat upper surface of the substrate (1). A plurality of rib bodies (2) are provided, and the pitch (2p) between the rib bodies (2) is determined by the vertical reinforcing bars (10) and the horizontal reinforcing bars (11) of the slab reinforcing bars (R) assembled in the lattice shape. A formwork panel characterized by being substantially equal to the pitch (10p, 11p) between them. The formwork panel according to claim 2, wherein the rib body (2) has a quadrangular prism shape having the same vertical and horizontal widths from the upper end to the lower end.

Images