JPH07113263A - Permanent formwork for concrete construction - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a permanent formwork for concrete work which can be assembled without requiring cutting at the construction site. [Structure] When the pitch of the basic modules of the pillars and beams that are the wall base material is a, the effective dimensions L ₁ L ₂ are multiples of a / 2,
Further, there are two kinds of corner members 1 having L-shaped cross sections in which effective dimensions L ₁ L ₂ are different by a / 2, and at least ridges 2, 2 are formed on the back surfaces of both end edges of the corner member 1, and ,
The corner members 1 and 1 made of fiber reinforced cement in which the rear surface sides 2A and 2A of the corner members 1 are provided on the protrusions 2 and 2 and the step members 3 and 3 are provided, and the effective dimension is a A plurality of types of first fiber reinforced cement plate-shaped member, which is a multiple of
It consists of a combination of a first fiber-reinforced cement plate member with an effective dimension that is a multiple of a and a second fiber-reinforced cement plate member that engages.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a permanent formwork for concrete work.

[0002]

2. Description of the Related Art Generally, a concrete wall is constructed by forming a mold made of plywood or the like, pouring concrete into the mold, waiting for it to harden, and removing the mold from the concrete wall surface. In the case of, the construction was performed by the procedure of attaching the heat insulating material. However,
In the case of the above-mentioned formwork method, the formwork is used only for constructing the wall surface, and there is a drawback that the work for removing the formwork after that is very troublesome.

Further, since the conventional formwork is made of plywood and uses natural materials, even if it is repeatedly used, it is eventually discarded, and in the case of building construction, the amount used in a single construction work. In addition to the enormous amount of natural resources, the consumption of natural materials is remarkable, and their use must be restricted from the viewpoint of protecting the natural environment. From such a point of view, a permanent formwork made of fiber reinforced cement for concrete construction has been proposed, and it has been proposed to use it instead of a conventional plywood formwork (for example, JP-A-3-293473). This kind of concrete formwork has the advantage that it does not use natural resources such as wood, and it is finally integrated with the concrete to be placed, and the formwork is directly integrated with the walls or columns of the building structure. This has the advantage that the subsequent frame removal work can be omitted.

[0004]

[Problems of the prior art] However, since the permanent formwork for concrete work is hard in material, it is not easy to cut it if it is necessary to cut the formwork according to the size of the building, and it also cuts. Since there is no engagement step at that part, there is a drawback that joining with other formwork for concrete wall becomes very troublesome.

[0005]

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a permanent formwork for concrete work which has a wall surface of any area as long as the wall surface is designed according to the basic module. The purpose of the present invention is to provide a permanent formwork for concrete construction that can be easily assembled without the need for cutting.

[0006]

That is, the permanent formwork for concrete construction of the present invention has an effective dimension L ₁ L ₂ of a / A corner member 1 which is a multiple of _{2 and} has two types of L-shaped cross sections in which effective dimensions L ₁ L ₂ are different by a / 2.
Protrusions 2 and 2 are formed at least on the back surfaces of both end edges of the corner member 1, and the rear surface sides 2A and 2A of the corner member 1 extend to the projections 2 and 2 and have a stepped engagement step portion 3, Fiber-reinforced cement corner members 1 and 1 provided with ₃ and a plurality of types of plate-like bodies 4 having an effective dimension L ₃ of a multiple of a,
At least the ridges 5, 5 are formed on the rear surface of the end edge, and a step-like engagement step portion 6 that fits with the corner member 1 is provided on one end side, and the engagement step portion is provided on the other end side. A first fiber-reinforced cement plate-shaped member 4 provided with a stepped engagement step 6 that is symmetrical to the portion 6; and a plate-shaped body 7 having an effective dimension L _{4 that} is a multiple of a. An engaging step portion 8 that engages with the engaging step portion 6 of the first fiber-reinforced cement plate member 4
A second fiber-reinforced cement plate-shaped member having at one end, an engagement step portion 8A that is point-symmetrical to the engagement step portion at the other end, and protrusions 9 and 9 formed on the back surface. It is characterized by being combined with 10.

[0007]

Embodiments of the present invention will be described below. 1 is a sectional view of a corner member according to an embodiment of the present invention, FIG. 2 is a sectional view of a first fiber-reinforced cement plate-shaped member, and FIG. 3 is a sectional view of a second fiber-reinforced cement plate-shaped member. 4 and 5 are cross-sectional views showing a usage state.

As shown in FIG. 1, the permanent formwork for concrete construction according to the present invention has an effective dimension L ₁ L ₂ of a / 2 when the pitch of the basic modules of the pillars and beams serving as the wall base material is a.
A corner member 1 having two types of L-shaped cross-sections, each having a different effective dimension L ₁ L ₂ by a / 2. The rear side 2 of the corner member 1 is formed on the ridges 2 and 2.
Fiber-reinforced cement corner members 1 and 1 provided with stepped engagement step portions 3 and 3 from which A and 2A extend, and as shown in FIG. 2, effective dimension L ₃ is a multiple of a. A plurality of types (six types in the illustrated example) of plate-shaped bodies 4A to 4F, in which protrusions 5 and 5 are formed on at least the back surface of the edge, and one end side of which is fitted with the corner member 1 stairs Shaped engagement step 6
And a first fiber-reinforced cement plate-shaped member 4 provided with a step-like engagement step portion 6 which is provided on the other end side and which is symmetrical with the engagement step portion 6, and as shown in FIG. , The effective dimension L ₄ is a multiple of a, and the first fiber-reinforced cement plate-shaped member 4
Has an engagement step portion 7 that engages with the engagement step portion 6 at one end and an engagement step portion 8 that is point-symmetrical to the engagement step portion at the other end, and has a protrusion 9 on the back surface. 9 is formed of a combination of second fiber-reinforced cement plate-shaped members 10.

In the above embodiment, the basic module refers to a dimension that serves as a reference when designing the layout of columns or beams. For example, when the pitch of the basic modules is 50 mm, as shown in FIG. The size A of A is 500 mm to 1000 mm at a pitch of 50 mm, and in the case of the beam Q, the beam width B and the beam composition C are set to the above values as shown in FIG. Therefore, the effective dimension L ₁ L ₂ of the corner member 1 of the present invention is L ₁ = 50 m when the basic module pitch a is 50 mm in the previous example.
m, L ₂ = 75 mm, etc. Similarly, the effective dimension L ₃ of the first fiber-reinforced cement plate member 4 is 200 mm, 250 mm, 30
The effective dimension L ₄ of 0 mm, 350 mm, 400 mm, 450 mm and the second fiber-reinforced cement plate-shaped member 9 is set to 300 mm or the like.

Further, in the above-mentioned embodiment, the shape of the convex stripes 2, 5, 9 on the back surface is the convex stripe forming the dovetail groove, but the convex stripes forming the grooves whose side surfaces are parallel to each other. It may be. Further, the corner member 1, the first fiber-reinforced cement plate-shaped member 4 and the second fiber-reinforced cement plate-shaped member 10 can be lightened by providing hollow holes 11 as shown in the figure, which is convenient. good. The hollow holes 11 are not always necessary and may be solid ones. The permanent formwork for concrete construction in the above embodiment is formed by extrusion molding or cast molding.

[0011]

As shown in FIG. 4, the permanent formwork for concrete work according to the present invention is formed by connecting the engaging step portions to each other to form the formwork. Since the engaging step portions 6 of the fiber-reinforced cement plate-shaped member 4 are bilaterally symmetric, while the engaging step portions 7 and 8 of the second fiber-reinforced cement plate-shaped member 11 are point-symmetrical, By combining the first fiber-reinforced cement plate-shaped member 4 and the second fiber-reinforced cement plate-shaped member 11, each engagement step can be always engaged in the forward direction. At this time, the effective dimension L ₁ L ₂ L ₃ L ₄ of each member is the pitch a of the basic module.
Since it is set as a multiple of a / 2 or multiple of a, the column P or the beam Q can be selected by arbitrarily selecting these combinations.
The joint part can be matched with the part of. In the case of the embodiment, since there are two types of L-shaped corner members, the pillar P
Depending on the thickness of a, starting either a or a / 2, and combining this with the first and second plate-shaped members 4 and 10, the lengths shown in the table below can be constructed. If the basic module has a pitch of 50 mm, it is possible to support all columns and beams.

Combination of pillar base materials Combination of beam width Combination of beams A L ₂ L ₃ L ₄ B L ₁ L ₃ L ₄ C L ₁ L ₃ L ₄ 500 → 75 + 350 300 → 50 + 200 500 → 50 + 450 550 → 75 + 400 350 → 50 + 250 550 → 50 + 200 +300 600 → 75 + 450 400 → 50 + 300 600 → 50 + 250 +300 650 → 75 + 200 +300 450 → 50 + 350 650 → 50 + 300 +300 700 → 75 + 250 +300 500 → 50 + 400 700 → 50 + 350 +300 750 → 75 + 300 +300 550 → 50 + 450 750 → 50 + 400 → 75 + 350 +300 600 → 50 + 200 +300 800 → 50 + 450 +300 850 → 75 + 400 +300 850 → 50 + 200 +300 900 → 75 + 450 +300 900 → 50 + 250 +300 950 → 75 + 200 +300 950 → 50 + 300 +300 1000 → 75 + 250 +300 1000 → 50 + 350 +300 (Unit of number is mm)

[Combination of Column Base Material, Beam Width, and Beam Formation] In the above description, the left side of the column “Combination of column base materials” is the length dimension A of one side in the square cross section of the column P as shown in FIG. The left side of the "Combination of beam widths" column indicates the width dimension B of the beam,
The left side of the "combination of beams" column shows the length C of the beam. The first item on the right side of each column is the effective dimension L ₁ of the corner member 1, and the second item L ₂ is the effective dimension L of the first plate member 4.
_{The third} and third items indicate the effective dimension L ₄ of the second plate-shaped member 9.

Then, the permanent formwork 1 for each concrete construction
Since they are joined to each other at the engagement step, it is possible to reliably prevent the concrete from flowing out from the joined portion. Further, after the concrete is poured, the concrete flows into the spaces between the ridges 2, 5 and 9 on the back surface of the permanent formwork for concrete and hardens, so that the concrete is strongly integrated. It should be noted that if the permanent formwork 1 for concrete work shown in FIGS. 2 and 3 is made to face the rear surface and is vertically erected at parallel intervals, a formwork having a flat wall can be constructed.

[0015]

As described above, according to the present invention, the permanent formwork 1 for concrete work can be easily assembled without cutting by using an arbitrary combination, and further, the permanent formwork 1 for concrete work can be assembled in combination with a flat formwork. The versatility is wide because you can assemble walls of any width. Further, by providing a decorative upper surface as a wall surface on the surface of the permanent formwork for concrete work, it is possible to omit the subsequent makeup work and to contribute to shortening the construction period. Further, since wood, which is a natural resource, is not used at all, it has various effects such as contributing to nature conservation.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a sectional view of a first fiber-reinforced cement plate-shaped member.

FIG. 3 is a sectional view of a second fiber-reinforced cement plate-shaped member.

FIG. 4 is a cross-sectional view showing a usage state of the embodiment.

FIG. 5 is a cross-sectional view showing a usage state of the embodiment.

[Explanation of symbols]

a ... Pitch of basic module L ₁ L ₂ L ₃ L ₄ ... Effective dimension 1 ... Corner member 2 ... Ridge 2A ... Back side 3 ... Stair-like engagement step 4 ... First fiber-reinforced cement plate member 5 ... ridge 6 ... step-like engagement step 7 ... engagement step 8 ... engagement step which is point-symmetrical with the engagement step 9 ... ridge 10 ... second fiber-reinforced cement plate shape Element

Claims (1)

[Claims] 1. The effective dimension L ₁ L ₂ is a multiple of a / 2, and the effective dimension L ₁ L ₂ is a, where a is the pitch of the basic modules of columns and beams that are the wall base material. Two kinds of corner members 1 having an L-shaped cross section, which are different from each other by / 2, in which at least ridges 2 and 2 are formed on the back surfaces of both end edges of the corner member 1, and the ridge portions 2 and 2 are formed. Back side 2 of corner member 1
Fiber-reinforced cement corner members 1 and 1 provided with stepped engagement step portions 3 and 3 from which A and 2A extend (b) Plural kinds of plate-like bodies in which effective dimension L ₃ is a multiple of a 4, the protrusions 5 and 5 are formed on at least the rear surface of the edge, and the stepped engagement step portion 6 that fits with the corner member 1 is provided on one end side and the other end side. Is a first fiber-reinforced cement plate-shaped member 4 provided with a stepwise engagement step 6 that is symmetrical to the engagement step 6 (c) A plate with an effective dimension L ₄ being a multiple of a The shape body 4 has an engagement step portion 7 that engages with the engagement step portion 6 of the first fiber-reinforced cement plate-shaped member 4 at one end, and the engagement step portion and the point at the other end. Second fiber-reinforced cement plate-shaped member 9 having symmetrical ridges 7A and protrusions 8, 8 formed on the back surface. A permanent formwork for concrete construction, characterized by consisting of