JPS5921829A - Concrete formwork method - Google Patents

Abstract

PURPOSE:To simplify the process of concrete formwork method by a method in which a metal net is laid on the inside of an axile assembly made up of plural cross and vertical pieces of a metal form material of a nearly lip-proove form of cross section in order to form a formwork, and concrete is placed between the formwork erected. CONSTITUTION:Frameworks 2 are made up of lower and upper cross pieces 3 and 5 and plural vertical pieces 4, made of a metal form material having a nearly lip-groove form of cross section. They are erected at a given interval on the concrete foundation 1 in mutually facing manner. A metal net 16 of metal laths is laid through a coupler 8 to the inside of the frameworks 2, iron bars 17 are set inside the metal nets 16, and concrete is placed. After a given strength develops in the concrete, the frameworks 2 are removed off. The process of the concrete formwork method can thus be simplified and man-power required can also be saved.

Description

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

(Prior art) In the conventional formwork method, weir plates made of wood or metal are installed in a predetermined shape, and this is fixed on the outside with supports such as many pieces of timber or pillars. This method involves removing the weir plates and shoring once the concrete poured within the frame 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. In addition, in the case of complex-shaped structures, it was necessary to cut the weir plates according to the drawings each time, making assembly of the formwork extremely troublesome.

In addition, when metal foam or plastic panels are used for the weir board, the concrete surface 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 not only simplifies formwork work and saves labor, but also can easily handle complex-shaped structures, and eliminates the need for plastering. - The purpose of the present invention is to provide a concrete formwork construction method that can prevent the finished part from peeling off in the case of a beard.

(Structure of the Invention) In the formwork construction method according to the present invention, a framework is constructed with at least two horizontal bars and a plurality of vertical bars, then wire mesh is pasted inside each of the frameworks, and then the wire mesh The method is characterized in that concrete is poured inside the formwork using a mold, and the framework is removed after the concrete has hardened.

Example Hereinafter, the present invention will be explained with reference to an illustrated embodiment.

FIG. 1 is a schematic diagram showing an embodiment of the present invention.

Frames 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 is composed of a lower horizontal bar 3, a vertical bar 4, and an upper horizontal bar 5. The lower horizontal beam 3 is laid on the concrete foundation 1 and fixed to the concrete foundation 1-E with a plurality of fixing hardware 6. Vertical beam 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 with connecting fittings 7 shown in FIGS. 6 and 7. The upper horizontal beam 5 is installed across the vertical beams 4, 4, and is connected to the vertical beams 4, 4 by connecting fittings 7 (3).

Lower horizontal beam 3. The vertical bar 4 and the upper horizontal bar 5 are metal sections having a substantially lip groove shape in cross section.

The fixing hardware 6 is an angle material and is fixed to the concrete foundation l and the lower horizontal beam 3 with nails or screws 9.

The connecting fitting 7 has a horizontal portion 10 and a swollen portion 11 formed in an abbreviated shape, and has an upper portion 1tljJ approximately at the center of the horizontal portion 10.
)1111 pin 12 is passed through, and a clamping plate 13 is rotatably fixed to the penetrating portion of the shaft pin 12. The connecting fitting 7 is fixed to the upper and lower horizontal bars 3 and 5 by sandwiching the lip portions 14.14 of the two lower horizontal bars 3.5 between the horizontal portion 1° and the clamping plate 13. 9. At the left and right edges of the vertical part 11, there are clamping pieces 1 that protrude into two in the horizontal direction.
5.15 are formed along the vertical direction of the 1IiII& portion 11, and the connecting piece 7 is fixed to the vertical beam 4 by holding the lip portion 14.14 of the vertical beam 4 with a clamping piece 15.15.

When the assembly of the frame assemblies 2, 2 is completed, a wire netting 16 such as metal lath, wire lath, glue plus (4), etc. is hooked to the inside of the frame assemblies 2, 2 with the fasteners 8, etc. and stretched.

In addition, a spacer is installed between the frame assemblies 2 and 2, if necessary.

When the tensioning of the wire mesh 16 is completed, reinforcing bars 17 are placed inside the wire mesh 16 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 160.

In addition to the illustrated embodiment, it is also possible to construct only the negative side using the formwork construction method of the present invention, and construct the remaining sides using conventional wooden or metal weir plates.

(Effects of the invention) As described above, this construction method makes it possible to construct concrete structures and reinforced concrete structures extremely easily, and also simplifies and omits the formwork work, which in turn shortens the construction period. Costs can be reduced. In particular, the upper and lower horizontal and uni-sho bars can be used repeatedly, making them extremely economical. Furthermore, it can be used freely for complex-shaped structures, and if the hammered edges are plastered, it is possible to prevent the finished parts from peeling off.

[Brief explanation of drawings]

#￥1 Figure is a partial perspective view of the natto tea frame, and Figure 2 is its X.
IL side view, Figure 3 is a perspective view showing the connection form j1 between the lower ladder pier and the & , #ff6, and FIG. 7 are perspective views of the connecting fittings. ]... Concrete foundation, 2... Frame, 3... Lower horizontal beam, 4. Rumor vertical beam, 5... Upper horizontal beam, 6. Fixed hardware, 7
・・Connection fittings, 8.・Locking devices, 9.・Nails and screws, 】0.・Horizontal part, 11.・Vertical part, 12.・Shaft bottle, 13.・Holding plate, 14.・Lip part, 15. Clamping piece, 16. Wire mesh, 17. Reinforcement bar. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] (1) A framework is constructed of at least two horizontal bars and a plurality of vertical bars, and wire mesh is stretched inside each of the frameworks,
Thereafter, concrete is poured inside the wire mesh as a formwork, and after the concrete has hardened, the framework is removed.