JPH0252747B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a concrete form construction method for constructing concrete structures and reinforced concrete structures.

(Prior art) The conventional formwork construction method involves setting up a weir board made of wood or metal in a predetermined shape, fixing it from the outside with supports such as timbers or pillars, and placing it inside the formwork. This method involves removing the weir plates and shoring once the poured concrete has hardened to the required strength. However, in the conventional formwork construction method, when assembling the formwork, a large number of weir plates are accurately installed one by one so that there are no gaps after assembly, and they are securely fixed so that they do not shift. Furthermore, in the case of formwork for complex-shaped structures, it was necessary to cut the weir plates each time according to the drawings, making assembly of the formwork extremely troublesome. Furthermore, when metal foam or plastic panels are used for the weir board, the surface of the concrete is too smooth, so mortar from plastering does not adhere well, and the finished parts of the plastering may peel off at a later date.

(Objective of the Invention) This invention was proposed in view of the above circumstances, and it simplifies and saves labor in formwork work, can easily handle complex-shaped structures, and has a plastered surface finish. In this case, it is possible to prevent the finished part from peeling off.

(Structure of the Invention) In the formwork construction method according to the present invention, at least one side of the formwork is formed by a metal profile of horizontal and vertical bars each having a plurality of claws on one side and a wire mesh. When assembling, the claws provided on the metal profile face inward, a framework is constructed between two horizontal bars with a plurality of vertical bars interposed therebetween, and a wire mesh is attached to the claws inside the framework. Hook and attach. Concrete is placed between the formworks, which are assembled on at least one side as described above and erected facing each other, and after the concrete has hardened, the framework is removed.

(Example) The present invention will be described below with reference to an illustrative example.

In FIGS. 1 and 2, opposing formworks are both constructed using the formwork construction method of the present invention.

Frame assemblies 2, 2 are assembled facing each other at required intervals on a concrete foundation 1 made of cast-in-place concrete. The frame assembly 2 includes a lower horizontal beam 3, a vertical beam 4, and an upper horizontal beam 5.
It consists of The lower horizontal beam 3 is laid on the concrete foundation 1 and fixed onto the concrete foundation 1 with a plurality of fixing hardware 6. The vertical bars 4 are erected on the lower horizontal bar 3 at regular intervals in the longitudinal direction of the lower horizontal bar 3, and are connected to the lower horizontal bar 3 by connecting fittings 7 shown in FIGS. 6 and 7. The upper horizontal bar 5 is disposed astride between the vertical bars 4, 4, and is connected to the vertical bars 4, 4 by connecting fittings 7, respectively.

The lower horizontal bar 3, the vertical bar 4, and the upper horizontal bar 5 are metal profiles each having a substantially lip groove shape in cross section and having a cut-out claw 8 formed on one or two sides thereof. When assembling the frame assembly 2, each member is installed so that the claws 8 face inward.

The fixed hardware 6 is made of angle material, and is not equipped with nails or screws 9.
It is fixed to the concrete foundation 1 and the lower horizontal beam 3.

The connecting fitting 7 is formed into a substantially L-shape from a horizontal portion 10 and a vertical portion 11, and a shaft pin 12 is passed through the approximately central portion of the horizontal portion 10 from above.
A clamping plate 13 is rotatably fixed to the penetrating portion of 2. The connecting fitting 7 is connected to the lip portion 1 of the upper and lower horizontal bars 3 and 5 by the horizontal portion 10 and the clamping plate 13.
4 and 14 are sandwiched and fixed to the upper and lower horizontal members 3 and 5, respectively. Further, on the right and left edges of the vertical part 11, clamping pieces 15, 15 that protrude into two in the horizontal direction are formed along the vertical direction of the vertical part 11. Lip part 1
4 and 14 are sandwiched and fixed to the vertical beam 4.

When the assembly of the frame assemblies 2, 2 is completed, a wire netting 16 such as metal lath, wire lath, or rebrass is cut out and hooked to the claws 8 and attached to the inside of the frame assemblies 2, 2. Additionally, a spacer is installed between the frame assemblies 2, 2, if necessary.

When pasting of wire mesh 16 is completed, wire mesh 1
Reinforcing bars 17 are placed inside the walls 6 and 16, and then concrete is poured.

When the poured concrete has developed a certain level of strength, the frames 2 and 2 are removed. If necessary, a finishing material such as mortar is applied to the surface of the wire mesh 16.

In addition, although not shown, only one formwork can be constructed using the formwork construction method according to the present invention.

For example, this is the case when the shape is complicated, such as having unevenness on only one side. In such a case, if one side is constructed using the conventional method and the other using the formwork method according to the present invention, even if one side has a complicated shape, the construction can be easily and quickly performed.

(Effects of the Invention) As described above, according to this construction method, concrete structures and reinforced concrete structures can be constructed extremely easily, and formwork work can be simplified.
This will lead to simplification, which in turn will shorten the construction period and reduce construction costs. In particular, the upper and lower horizontal bars and vertical bars can be used repeatedly, making it extremely economical.
In addition, it can freely handle structures with complex shapes.
In addition, if the raised surface is plastered, it is possible to prevent the finished part from peeling off.

[Brief explanation of drawings]

Figure 1 is a partial perspective view of the assembled frame, Figure 2 is its plan view, Figure 3 is a perspective view showing the connection between the lower horizontal beam and the vertical beam, and Figures 4 and 5 are the top and bottom. A partial perspective view of the horizontal beam and the vertical beam, and FIGS. 6 and 7 are perspective views of the connecting fittings. 1... Concrete foundation, 2... Frame, 3...
Lower horizontal bar, 4... Vertical bar, 5... Upper horizontal bar, 6...
Fixed hardware, 7... Connecting metal fittings, 8... Cutting claws,
9...Nails or screws, 10...Horizontal part, 11...Vertical part, 12...Axis pin, 13...Holding plate, 14...
Lip part, 15... Holding piece, 16... Wire mesh, 1
7...Reinforced steel.

Claims (1)

[Scope of Claims] 1. A concrete formwork construction method in which at least one side is formed of metal shapes and wire mesh for horizontal and vertical bars provided with a plurality of claws on one side, the claws facing inward. A framework is constructed between two horizontal bars with a plurality of vertical bars interposed therebetween, a wire mesh is hooked onto the claws and attached to the inside of the framework, and concrete is poured between the opposing formworks. A concrete form construction method characterized in that the framework is removed after the concrete has hardened.