JPS6016543B2 - Ceiling finishing formwork and concrete floor slab construction method using the formwork - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a ceiling finishing form used in constructing concrete structures such as mid-to-high-rise buildings, and a method for constructing a concrete floor slab using the form. It is related to.

(Prior art) Conventionally, in construction work for buildings, etc., in order to construct concrete floors on upper floors such as the second and third floors, formwork is stretched between beams, etc., and the formwork is stretched from below or above. It required so-called shoring to support it.

This shoring device is complicated and time-consuming, and causes delays in construction work.

In addition, the above-mentioned drawbacks were improved, for example, in the 5th century
As shown in No. 1-7816, a synthetic floor slab made of precast concrete with ribs on the upper surface that serves both as a work floor and a formwork is erected between the beams, etc., and on top of this, cast-in-place concrete is poured to form an integrated slab. has been proposed.

(Problems to be Solved by the Invention) When using a ceiling finishing formwork that becomes a waste formwork like the above-mentioned composite floor slab, the strength of the formwork itself, the bonding strength between the formworks, and the strength of the formwork The strength of the bond with cast-in-place concrete is a particular issue, and furthermore, it is required to minimize the amount of reinforcing work required on-site to improve work efficiency.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a ceiling finishing form to solve these problems and a method of constructing a concrete floor slab using the form.

(Means for Solving the Problems) First, in the ceiling finishing formwork of the present application, the substrate portion 1 itself made of a fiber-reinforced inorganic material is erected in a direction parallel to and perpendicular to the support members 8, 8 to be erected. It is a planar structural member having a strength against
By protruding each protrusion 2 made of the same material in parallel in a direction orthogonal to each support member 8, 8, it is reinforced to resist compression from above.

Further, longitudinal reinforcing bars 7 and lateral reinforcing bars 6 arranged in a mesh pattern on the upper surface of the substrate section 1 are provided at intervals along the upper surface of the substrate section 1. Among them, some longitudinal reinforcing bars 7 whose longitudinal direction coincides with the ridges 2 are buried in the ridges 2, and horizontal reinforcing bars that intersect with the ridges 2 are buried penetratingly through each ridge 2. Each of these reinforcing bars 6, 7
This is a configuration that supports Next, for the joint diamond layer of the present application, prepare the desired number of the above precast formworks and bring them to the site.
This is constructed above each support village 8 in a direction in which the protrusion 2 is orthogonal to the support member 8, and a joint iron is installed between each adjacent formwork along the extending direction of the support village 8. After the mesh 9 is superimposed on the vertical and horizontal reinforcing bars 7 and 6 exposed on the upper surface of each joining side, concrete B is placed on the upper surface of each formwork to cover them integrally and join them.

EXAMPLES Below, the structure of the present invention will be explained based on the examples shown in the drawings. As shown in FIG. It consists of a plurality of protrusions 2 formed integrally with the substrate and similarly made of fiber-reinforced inorganic material.

The substrate section 1 is arranged such that the lower surface 3 becomes the finished ceiling surface.
It is formed into a smooth surface by appropriate means.

However, the above-mentioned protrusion 2 has an inverted trapezoidal end face or cross-sectional shape in the width direction in consideration of bending rigidity and reinforcement during concrete pouring, and reinforcing reinforcing bars are provided inside the protrusion 2 along the extension direction. A suitable number of reinforcing bars 4 are provided along the upper surface 5 of the base plate 1, and horizontal reinforcing bars 6 passing through the protrusions 2 and vertical reinforcing bars 7 orthogonal thereto are arranged in a mesh pattern. Place it in

The formwork A of the present invention, as shown in FIG.
It goes without saying that it has a desired length so that it can be stretched between supporting members 8 such as pillars, and its width is not only a well-known prescribed size but also arbitrarily determined in advance for handling purposes.

Next, when constructing a concrete floor slab using the formwork A, as shown in FIGS. hand over,
A joint wire mesh 9 is superimposed on the upper surface of the vertical and horizontal reinforcing bars 6 and 7 exposed on the upper surface of the joint between the formworks A, and then concrete B is cast on the formwork, and the base plate part 1 The ridges 2 on the upper surface, vertical and horizontal reinforcing bars 6 and 7, and joint iron silk 9 are integrally integrated to form the ceiling from the lower floor and the floor from the upper floor.

The protrusions 2 of the formwork A maintain an inverted trapezoidal end face or cross-sectional shape in order to reinforce the base plate 1, and reinforcing reinforcing bars 4 are installed in the longitudinal direction of the inside.
However, the external shape of the protrusion 2 is such that it is easy to integrate with the post-cast concrete part 8 and provides sufficient bending composition and strength to the base plate part 1 to make underfloor shoring unnecessary. In addition, the structure is designed to be easy to manufacture, provide and obtain at low cost, etc.

In addition, to join the formwork A, the overlapping joint iron silk 9 and the protrusions 2 are integrally poured into concrete on the upper surface of the joint, and the desired tiling or the like is later applied to the concrete surface.

(Effects of the Invention) As in the embodiments described above, the formwork A of the present invention is reinforced by arranging protrusions 2 orthogonal to the supporting members 8 such as beams on the upper surface thereof,
The use of a fiber-reinforced inorganic material for the substrate portion 1 and the protrusions 2, the intersection of vertical and horizontal reinforcing bars 7 and 6 arranged in a mesh pattern along the upper surface, and the extending direction of the protrusions 2. By embedding and retaining some of the longitudinal reinforcing bars 7 in the protrusions 2, the structure provides high strength such as bending rigidity and resistance to cracking, and can greatly eliminate the need for complicated reinforcing work using smoothers on site. It is possible to obtain a precast ceiling finish formwork that is extremely easy to handle and exhibits the following effects.

Furthermore, when constructing a concrete floor slab, the formwork A is installed in parallel between the support members 8 in such a manner that the protrusion 2 is perpendicular to the extending direction of the support village 8 such as a beam, and the formwork A is joined. Separately prepared joint iron silk 9 is superimposed on the vertical and horizontal reinforcing bars 7 and 6 exposed on the upper side surface, and concrete B is poured on-site on the entire upper surface, thereby forming an integrally joined ceiling finish and floor surface. By using formwork A as a waste formwork, shoring is omitted, and in addition, complicated joining work such as binding on site is largely omitted, and the vertical and horizontal reinforcing bars 7, 6 and joint steel mesh 9 are
Since the poured concrete B is filled from the upper and lower sides of the mold, each precast formwork A and the cast-in-place concrete B are firmly integrated, and at the same time, adjacent formworks can be firmly connected, etc. This contributes to shortening the construction period and improving quality.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and Fig. 1 is an end view of the formwork, Fig. 2 is an end view of the formwork in a joined state, and Fig. 3 is an embodiment of the joining, partially disclosed. It is something. [Explanation of symbols] 1...Base part, 2...Protrusion, 3...Bottom surface, 4...Reinforcement bar, 5...
...Top surface, 6... Lateral reinforcing bars, 7...
...Vertical reinforcing bars, 8...Supporting members, 9...
...Joint iron silk, A...Formwork, B...
·concrete. Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1. On the upper surface of the substrate part 1 made of fiber-reinforced inorganic material whose lower surface is the ceiling finish surface, there are a plurality of individual fiber-reinforced inorganic material also made of fiber-reinforced inorganic material, each integrally protruding from the substrate part 1. Projection 2
The longitudinal reinforcing bars 7 extending in parallel and parallel to the longitudinal direction of the protrusions 2 and the transverse reinforcing bars 6 perpendicular thereto are formed into a mesh, and are attached to the upper surface of the base plate 1. Each longitudinal reinforcing bar 7 is arranged at a constant interval.
A portion of the longitudinal reinforcing bars that coincide with the longitudinal direction in which the protrusion 2 extends are buried within the protrusion, and a portion of each horizontal reinforcing bar that is orthogonal to the protrusion 2 is buried within the protrusion 2. A ceiling finishing formwork characterized by being embedded and supported in a penetrating manner. 2. On the upper surface of the substrate section 1 made of a fiber-reinforced inorganic material whose lower surface is the ceiling finish surface, there are a plurality of protrusions 2 made of the same fiber-reinforced inorganic material, each integrally protruding from the substrate section 1.
The longitudinal reinforcing bars 7 extending in parallel and parallel to the longitudinal direction of the protrusions 2 and the transverse reinforcing bars 6 perpendicular thereto are formed into a mesh, and are attached to the upper surface of the base plate 1. Each longitudinal reinforcing bar 7 is arranged at a constant interval.
A portion of the longitudinal reinforcing bars that coincide with the longitudinal direction in which the protrusion 2 extends are buried within the protrusion, and a portion of each horizontal reinforcing bar that is orthogonal to the protrusion 2 is buried within the protrusion 2. Prepare a desired number of precast ceiling finishing forms A that are embedded and supported in a penetrating manner, and project each of these forms A in such a manner that the protrusions 2 are perpendicular to the extending direction of the supporting member 8 such as a wall. The joints are installed between the support members with the strip side facing upward, and are installed on the vertical and horizontal reinforcing bars 7 and 6 exposed on the base plate 1 of each formwork A adjacent along the extending direction of the support member 8. After the iron mesh 9 is polymerized, concrete B is poured and covered on the upper surface of each formwork A at least until each of the protrusions 2 are buried, thereby creating an integrated floor slab. A method for constructing a concrete floor slab characterized by forming a concrete floor slab.