JPH01268976A - Curved surface execution of concrete drive metal plate - Google Patents

Abstract

PURPOSE:To make it possible to execute easily for an aimed curved surface by fixing a thin flat steel plate provided with a shear-connector along the curved surface of a frame of an end thick material curved in accordance with the aimed curved surface so that it is capable of loading and unloading, and placing concrete. CONSTITUTION:Cross materials 2 and 2 compatible with a cross end thick material of angle steels curved in accordance with an aimed curved surface are arranged up and down in parallel, and longitudinal materials 3... compatible with a longitudinal end thick material of angle steels are provided and fixed between the cross materials at a certain interval to form a frame 1. Then, after fixing the one which a shear-connector is mounted on the inside of the thin flat steel plate 5 along the curved surface of the frame 1 so that it is capable of loading and unloading, concrete is placed. After that, the frame 1 is removed. Accordingly, it is no need to apply a work to the curved surface of the flat steel plate in advance, and at the same time, reinforcing materials for preventing the deformation of a sheathing board are not required.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to the curved surface of a metal plate poured into concrete when the lining material used for the inner wall surface of a curved concrete structure that requires airtightness is a metal plate. Regarding construction methods.

(Prior Art) For example, in a concrete silo or the like where the inner wall surface is required to have wear resistance, an iron plate or a stainless steel plate is often used as a lining material for a portion of the silo unloading hopper and the inner wall surface.

In order to improve construction efficiency, these metal plates are pre-curved into a circular conical shape, etc., and used in place of the concrete formwork, and reinforcing bars are attached to the inside of the metal plate to cast concrete. The metal plate was to be integrated with concrete as a lining material for the target structure.

(Problems to be Solved by the Invention) However, it has not been easy to bend a single metal plate into a desired curved surface due to its elastic action.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a construction method that allows a thin flat steel plate to be easily bent into a required curved surface and integrated with concrete when used on site.

(Means for Solving the Problems) In order to achieve the above object, the method for constructing a curved surface of a metal plate for concrete pouring according to the present invention is a method for constructing a curved surface of a metal plate for concrete pouring according to the present invention. A shear connector attached to the inside of the flat plate is used as a weir plate for the formwork, and this is removably fixed along the curved surface of the frame frame using end pieces that have been bent in advance to match the target curved surface, and after concrete is poured. The framework is to be removed.

(Function) The frame is made of thick pieces that have been bent to fit the target curved surface, and the metal plate used is thin, so it is easy to bend it along the curved surface of the frame. If you temporarily fix it to the frame with screws, etc., the metal plate will become a weir plate with the desired curved surface.Also, since a shear connector is used inside it, if you remove the frame, the metal plate will be integrated into the concrete surface. It becomes fixed.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

Figure 1 shows a frame frame 1 that constitutes a cylindrical concrete structure, and this frame has cross members 2 made of angle iron that are bent to form part of the circumference and serve as thick cross members at the side ends of the form. A vertical member 3 is provided which is arranged vertically in parallel and is fixed at a fixed interval between the upper and lower horizontal members 2-2, and which is made of angle iron and also serves as the vertical thick member of the formwork.

When the frame frames 1 are successively connected laterally, it becomes circular (the third
Figure (a)). Each vertical member 3 is provided with a plurality of through holes 4 for bolts in the vertical direction at regular intervals.

When the framework frame 1 is assembled, a circular frame with the vertical members 3 on the outer circumferential side is formed.

Next, place the flat steel plate 5 on the outside of the vertical member 3, pass the bolt 6 into the steel plate 5 from the vertically middle bolt through hole 4 side, and tighten the vertical member 3 with a cap nut 7 from the concrete pouring side of the steel plate 5. and the steel plate 5 are tightened together.

Furthermore, form ties 8 are set in the bolt through holes 4 at both ends of the vertical members 3, and the separators 9 are connected to the regular formwork 1 on the concrete pouring surface side of the steel plate 5 and on the outer peripheral surface side of the structure.
0 (Fig. 2 (a), Fig. 3 (a)
).

In addition, studs 11 are provided on the concrete pouring surface side of the steel plate 5.
is installed. Concrete 12 is poured between the steel plate 5 and the formwork 10 (FIG. 3(b)), and finally the frame 1 is removed (FIG. 2(b)).

(Effects) As described above, according to the present invention, concrete is poured using a metal plate in place of a formwork weir plate, and this metal plate is integrated with the poured concrete. Since the metal plate is fixed to the frame frame using the formwork ends which are pre-curved with a curvature that matches the curved surface of the object, the frame frame also serves as the formwork ends, and a reinforcing material is separately provided to prevent deformation of the weir plate. There is no need to provide one.

Furthermore, in the process of fixing the metal plate to the frame frame, the metal plate is gradually curved into the desired curved surface, so there is no need to use a metal plate that has been processed into a curved surface in advance, making handling and transportation easier. advantageous in terms of

[Brief explanation of the drawing]

The figures all relate to embodiments of the present invention; FIG. 1 is a perspective view showing a frame, FIG. 2(a) is a sectional view showing a steel plate attached to the frame, and FIG. 2(b) is a concrete A cross-sectional view with the frame removed after pouring, Figure 3 (a) is a perspective view showing the state of the frame and formwork assembled in the process of constructing a circular structure, and Figure 3 (b) shows the structure. FIG. 2 is a perspective view showing a state in which the formwork outside the outer circumferential surface of the container is removed. 1... Frame frame 2... Horizontal
Material 3... Vertical material 4... Bolt through hole 5... Flat steel plate 6...
... Bolt 7 ... Bag nut 8.
...Form tie 9 ...Separator
10...Form frame 11...Stud 1
2... Concrete patent applicant: Obayashi Co., Ltd. Koka Attorney Patent attorney - Ken Iro Chisuma Patent attorney Masatoshi Matsumoto 3rd

Claims (1)

[Claims] (1) When constructing a metal plate integrally on the surface of a curved concrete structure, a thin metal plate with a shear connector attached to the inside is used as a weir plate for the formwork, and this is adjusted to fit the target curved surface. A method for constructing a curved surface of a metal plate for concrete pouring, characterized in that the frame is removably fixed along the curved surface of a frame using pre-curved ends, and the frame is removed after concrete is poured.