JPH10184001A - Assembling method for eternal shuttering and members used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of assembling an eternal shuttering that allows to confirm easily how concrete is filled in corners in building a structure having corners such as a pole or a beam by concrete placement, and members used therefor. SOLUTION: A shuttering is assembled in a concrete placement site by connecting flat plate members 1 nearly covering the flat section of a structure such as a pole or beam with fixing bolts 3, using an L-shaped member 2 that covers their corners and their neighborhoods and connects the flat plate members 1 adjoining each other with the corner interposing between them, and after concrete is placed and cures, by removing the L-shape member 2, it is confirmed how concrete is filled in the corner. The L-shaped member 2 is reused in a corner of a structure of the same shape to reduce cost. If the L-shaped member is made transparent, it is possible to confirm how concrete is filled at the time of concrete placement.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method using a permanent form used for construction of a reinforced concrete structure or the like, and a member required for the method, and more particularly to a structure having a corner portion such as a column or a beam. It is suitable for.

[0002]

2. Description of the Related Art As a conventional construction method using a permanent form of a structure having a corner portion such as a column or a beam, for example, a simple flat form is used for a column or a form shown in FIG. A U-shaped permanent form or an L-type permanent form is used, and these are combined to form a form, and concrete is cast inside the form. Of course, as the name of the permanent formwork, the permanent formwork is left on the surface of the cast concrete, that is, on the surface of a structure such as a column or a beam.

[0003]

However, the above-mentioned conventional method using a permanent form and its members are opaque and remain on the surface of the structure after the concrete is cast. There is a problem that it is not possible to check the state of concrete placement inside the frame, especially the state of filling with concrete. Since the state of filling of concrete becomes unstable particularly at the corners of structures such as columns and beams, there is a demand to confirm the state of filling of concrete at least at these corners.

[0004] Further, the formwork including a corner portion as shown in FIG. 4 not only has a high shaping cost, but also takes a large space for stacking, so that the transportation cost is high and the whole is relatively expensive. There is also the problem of getting lost.

The present invention has been developed in view of these problems, and the so-called permanent molds to be left on the surface of the structure include only flat portions such as columns and beams made of flat plate members. The concrete is poured into the corners by combining the individual L-shaped members, and then the L-shaped members are removed so that the concrete filling state particularly at the corners can be confirmed. The cost reduction can be achieved by reusing the L-shaped member that covers the corner, and the L-shaped member can be made transparent so that the filling state can be checked even during concrete casting. It is an object to provide a member that can be used.

[0006]

According to a first aspect of the present invention, there is provided a method for assembling a permanent form according to the present invention. Combining a flat plate member that covers the vicinity of the corners of both ends and remains on the surface, and an L-shaped member that covers the corners of the structure not covered by the flat plate member and is removed from the surface Concrete, and then the L-shaped member is removed. Note that the L-shaped member covering the corners of the structures such as the columns and beams may cover a small area, and therefore does not take up space even when stacked.

The member used in the method for assembling a permanent form according to claim 2 of the present invention is the L-shaped member used in the method according to claim 1, and is formed of a transparent material. It is characterized by the following.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an embodiment of a method for assembling a permanent form according to the present invention and members used therein for actual reinforced concrete column construction.
In the figure, a rectangular plate-shaped and vertically long flat plate member 1 is provided to cover each of the four sides of the column while leaving each corner thereof, and the adjacent flat plate members 1 are connected to each other, and the four columns of the column are connected. The L-shaped member 2 covering each of the corners is joined to the flat plate member 1 and assembled.

FIG. 2 shows details of this assembled state. The above-mentioned L-shaped member 2 is made of transparent reinforced acrylic, and its shape is not a strict L-shape, and the corner corresponding to the top is chamfered according to the corner of the pillar. Has become. As described above, since the L-shaped member 2 is removed after the concrete is cast, the shape of the inner surface of the L-shaped member 2 is matched with the required shape of the outer surface of the corner of the pillar. is there. Both ends of the L-shaped member 2 are bent outward as ribs 11 for reinforcement. Further, at both ends, circular holes 12 for fixing bolts are formed at predetermined intervals in the vertical direction.

On the other hand, the flat plate member 1 is composed of a slightly thick precast plate or a fiber reinforced plate similarly to the conventional permanent mold. Since it is left as a permanent formwork,
The shape of the outer surface is the shape of the outer surface of each required flat portion of the column. Then, when combined with the L-shaped member 2, an embedding nut 13 is embedded at a position corresponding to the circular hole 12 formed in the L-shaped member 2 from the back side of each flat plate member 1. Have been.

Then, as shown in FIG. 2, for example, the L-shaped member 2 is applied between opposing ends of two adjacent flat plate members 1 so that the circular hole 12 of the L-shaped member 2 and the flat plate member 1 are embedded. With the nut 13 aligned with the washer 14 from the outside,
, The fixing bolt 3 is inserted, and the screw is screwed to the embedding nut 13 and tightened to assemble them.
Next, as shown in FIG. 1, a vertical end member 14 having a height corresponding to the rib 11 of the L-shaped member 2 is applied to the flat plate member 1 along the vertical direction, and further outside the column member, Two pairs of the lateral end pipes 15 on each side are applied sideways so as to be at the same position on the opposite side of the pillar. And
A separator 16 is passed between two pairs of lateral end pipes 15 that are in the same position on the opposite surface of the pillar, from the outside of the surface adjacent to the surface with which the lateral end pipe 15 is in contact. To the opposite end pipe 15 on the opposite side of the column.
A so-called pipe support is carried out by pressing the ribs 11 and the vertical end members 14 together with the flat plate member 1 to fix them.

In this state, since a formwork is formed in a portion where the column is to be constructed, concrete is poured into the formwork. At this time, since the L-shaped member 2 is made of transparent reinforced acrylic, the filling state of the concrete at the corners of the columns can be checked from the outside. Further, after the concrete is hardened, after removing the pipe support, the fixing bolt is removed as shown in FIG. 2b, and the L-shaped member 2 is removed.
The surface of the cast concrete is exposed on the pillar surface.
Of course, even in this state, the state of filling of the concrete at the corners of the columns can be confirmed.

The L-shaped member 2 described above can be reused for the construction of pillars, beams, and other structures having corners of the same shape, thereby reducing the cost of the conventional permanent corner formwork. Make it cheaper.
Furthermore, since the L-shaped member 2 may be large enough to cover the corners of the structure such as the pillar or the beam, there is little space required for stacking the L-shaped member 2 and the cost required for transportation and the like is small. The cost can be reduced.

In the above embodiment, the method of assembling the permanent form according to the present invention and the case where the members used for the method are applied to the construction of columns are described. However, the application of the present invention is not limited to this. For example, the present invention can be applied to any structure having a corner portion such as a beam shown in FIG. In the case of this beam, the upper flat plate member on which concrete is cast or L
No mold members are required.

Further, the L-shaped member is not necessarily required to be transparent. This is because the L-shaped member is removed after the concrete is hardened and the concrete at the corners of the structure is exposed, so that the filling state can be sufficiently checked even after the removal of the L-shaped member. However, if the L-shaped member is made transparent as in the above embodiment, it is possible to check the filling state of the concrete when the concrete is poured.

The ribs 11 can be omitted depending on the way of pipe support. Further, the flat plate member 1 and L
As a method of coupling with the mold member 2, screwing may be considered in addition to the bolt and nut.

[0017]

As described above, according to the method of assembling a permanent form according to the present invention, it is possible to confirm the state of filling of the concrete at the corners of the structural body after removing at least the L-shaped member, and to remove the concrete. The L-shaped member, which has been reused for the construction of the corners of other structures of the same shape, reduces the cost,
Further, by reducing the size of the L-shaped member, the required space can be reduced, and the cost for transportation can be reduced. In the member used in the method for assembling a permanent form according to the present invention, the L-shaped member can be made transparent so that the filling state of the corners of the structure can be confirmed even when concrete is poured.

[Brief description of the drawings]

FIG. 1 shows an embodiment in which a method for assembling a permanent form according to the present invention and members used therein are developed for construction of a pillar.
(A) is a cross-sectional view, (b) is a front view.

FIG. 2 is a transverse sectional view showing details of a construction state of FIG. 1;

FIG. 3 is an explanatory view of various assembling methods of a permanent form according to the present invention.

FIG. 4 is an explanatory view of a conventional permanent mold.

[Explanation of symbols]

 1 is a flat plate member 2 is an L-shaped member 3 is a fixing bolt

Claims (2)

[Claims] 1. A flat plate member that covers each surface of a structure having a corner portion such as a pillar or a beam up to near corner portions at both ends and is left on the surface, and a structure that is not covered by the flat plate member. A method of assembling a permanent formwork, comprising casting concrete in combination with an L-shaped member that covers a corner of a body and removed from the surface, and then removing the L-shaped member. 2. The L-shaped member used in the method of assembling a permanent form according to claim 1, wherein the member is formed of a transparent material and is used in the method of assembling a permanent form. .