JPH0791909B2 - Curved surface construction method of concrete driven metal plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to a curved surface of a concrete-implanted metal plate when the lining material used for the inner wall surface of the curved concrete structure requiring airtightness is a metal plate. Regarding the construction method.

<< Prior Art >> For example, in a concrete silo whose 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 the silo payout hopper portion or the inner wall surface.

In order to improve the construction efficiency, these metal plates are pre-bent into a cylindrical shape or a conical shape in a factory or the like, which is used in place of the concrete formwork, and at the same time, the reinforcing bars are attached to the inside of the metal plate to drive the concrete. The metal plate was integrated with concrete as a lining material for the target structure.

<< Problems to be Solved by the Invention >> However, it is not easy to bend a single metal plate into a desired curved surface due to its elastic action. In addition, it is not easy to transport a metal plate formed into a cylindrical shape, a conical shape, or the like at a factory to the site.

The present invention has been made in view of the above circumstances, and an object thereof is to easily use on-site when using a metal plate integrally provided on the surface of a curved concrete structure as a dam plate of a formwork. It is an object of the present invention to provide a method for constructing a curved surface of a concrete-implanted metal plate that can be bent into a required curved surface and that can be easily integrated with concrete.

<< Means for Solving the Problem >> In order to achieve the above object, the method for constructing a curved surface of a concrete-implanted metal plate according to the present invention, when integrally forming a metal plate on the surface of a curved concrete structure, A frame frame is formed with thickened edges that are pre-curved to match the target curved surface of the structure, and a thin metal flat plate with a shear connector attached to the concrete placing surface side is detachably fixed along the curved surface of the frame. However, the framework frame is removed after the concrete is poured and solidified.

《Working》 Since the frame is made up of the ends that have been bent in advance according to the target curved surface, and the thin metal plate is used,
It is easy to bend this along the curved surface of the frame,
If it is temporarily fixed to the frame with screws etc., the metal plate becomes a weir plate formed on the target curved surface, and since a shear connector is attached to the concrete placing surface side of the metal plate, the frame after solidification of concrete. If removed, the metal plate will be integrally fixed to the concrete surface.

«Examples» Hereinafter, preferred examples of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a framework 1 for constructing a cylindrical concrete structure, which is a form frame bent to become a part of the circumferential direction. The vertical member 3 is also used as a thick vertical member of the form frame made of chevron steel, which is vertically arranged in parallel and fixed across the upper and lower horizontal members 2-2 at a constant interval.

When the frame frames 1 are sequentially connected in the lateral direction, a circle is formed (3rd
Figure (a)). Each vertical member 3 has a plurality of bolt through holes 4 formed in the horizontal direction at regular intervals.

When the frame framework 1 is assembled, a circular frame with the vertical member 3 on the outer peripheral surface side is formed.

Next, the flat steel plate 5 is applied to the outer side of the vertical member 3, the bolt 6 is passed from the through hole 4 side of the vertically centered bolt to the steel plate 5, and the vertical member is attached from the concrete placing surface side of the steel plate 5 with the cap nut 7. 3 and the steel plate 5 are fastened together. Further, foam ties 8 are set in the through holes 4 of the bolts at both ends of the vertical member 3, and the separators 9 thereof are the normal formwork 10 on the concrete placing surface side of the steel plate 5 and the outer peripheral surface side of the structure. Are arranged between the two (FIGS. 2 (a) and 3 (a)).

In addition, on the concrete pouring surface side of the steel plate 5, the steel plate 5
Studs as shear connectors to improve the shear strength between the concrete and
11 is attached. However, concrete 12 is driven between the steel plate 5 and the formwork 10 (Fig. 3 (b)), and after the concrete 12 is solidified, the frame 1 is finally removed (Fig. 2 (b)). .

<Effect> As described above, according to the method for constructing a curved surface of a concrete-implanted metal sheet according to the present invention, a frame frame is formed by bending the edge in advance according to the target curved surface, and a thin flat plate is formed along the curved surface. The metal plate can be easily bent, and is detachably fixed with screws or the like, so that the metal plate can easily function as a barrier plate having a target curved surface, and the concrete placing surface of the metal plate can be Since the shear connector is attached to the side, the metal plate can be integrally fixed to the concrete surface even if the frame is removed after the concrete is solidified.

Further, since the framework frame is formed by the thick edges of the mold, it is not necessary to separately provide a reinforcing material for preventing the deformation of the dam plate.

Furthermore, since the metal plate is gradually bent into the target curved surface in the process of fixing the metal plate to the frame, it is not necessary to use a metal plate that has been processed into a curved surface in advance, and it is not necessary to use the frame or metal plate on site. It is also advantageous in terms of transportation.

[Brief description of drawings]

Each of the drawings relates to an embodiment 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 concrete. A cross-sectional view of the frame structure removed after placement, FIG. 3 (a) is a perspective view showing a state of the frame frame and the mold frame assembled in the process of constructing a circular structure, and FIG. 3 (b) is a structure. FIG. 4 is a perspective view showing a state in which a mold outside the outer peripheral surface of is removed. 1 ... Frame frame, 2 ... Horizontal member, 3 ... Vertical member, 4 ... Bolt through hole, 5 ... Flat steel plate, 6 ... Bolt, 7 ... Cap nut, 8 ... Foam tie, 9 ... Separator 10 …… Formwork, 11 …… Stud, 12 …… Concrete

Claims (1)

[Claims] 1. When a metal plate is integrally formed on the surface of a curved concrete structure, a frame frame is formed by an edge thickened in advance in accordance with the target curved surface of the structure, and a concrete placing surface. A thin metal flat plate having a shear connector attached to its side is detachably fixed along the curved surface of the framework frame, and the framework frame is removed after the concrete is set and solidified, and the curved surface construction method for the concrete-cast metal plate .