JP2688471B2 - Wall construction method using thin precast concrete plates - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a wall using a thin precast concrete plate having a special structure as an embedded formwork. 2. Description of the Related Art Conventionally, various thin-walled precast concrete plates have been proposed in which half of the truss bars are embedded in concrete and the other parts of the truss bars are projected from the panel. [0003] In the case of the conventional general thin-walled precast concrete plate, many parts are required to manufacture the truss bars, and the manufacturing of the truss bars is troublesome and the manufacturing cost is high. It was getting higher. The present invention has been made to solve the above problems, and is thin-walled precast concrete that is easy to manufacture, can be manufactured at low cost, and can be easily connected to a formwork during use. It is an object to provide a method of constructing a wall using a plate. The thin-walled precast concrete plate used in the present invention has a truss rebar fixed by interposing a corrugated oblique bar between two parallel main bars. Arranged so that the direction rises, assemble in a square, pour concrete, embed one main bar of the parallel main bar in the concrete panel part, and the other main bar protrudes from the surface of the concrete panel part It is formed by projecting a separator attachment portion at the intersection of the and diagonal lines. [0006] This thin precast concrete plate is built in a predetermined position, wall reinforcement is arranged on the side of the protruding truss, and then a barrier plate is erected to face through the separator attached to the separator attachment portion. By placing concrete between the thin precast concrete plate and the weir plate, troublesome support work, assembling the formwork and constructing a wall that simplifies dismantling are performed. The present invention will be described in detail below with reference to an embodiment shown in the drawings. In the figure, A is a truss muscle, which is fixed by interposing a corrugated oblique muscle 2 serving as an abdominal muscle between two parallel main muscles 1 and 1. (FIGS. 3a, 3b and 3c) Four trusses A are assembled in a rectangular shape so that the width direction rises, and fixed by welding. Further, the truss reinforcement A may be stretched over the intermediate portion of the truss reinforcement A assembled in this rectangular shape, and the reinforcing bar 3 may be stretched over it. (FIG. 1) The concrete panel portion 4 is formed by embedding one of the parallel main bars 1 of the truss bars A assembled as described above. The other main bar 1 is projected on one surface of the concrete panel portion 4. (FIG. 2) The separator mounting portion 5 is provided so as to project at the intersection of the truss reinforcement A and the diagonal reinforcement 2 of the thin precast concrete plate B configured as described above. The separator mounting portion 5 has a nut shape. (FIG. 4) Further, as shown in FIG. 5, the main bar 1 protruding from the concrete panel part 4 may be fixed by being slightly displaced from the top of the corrugated oblique bar 2 and the separator mounting part 5 may be formed on this triangular part. (FIG. 5) Further, as shown in FIG. 3b, the tip of the corrugated oblique streak 2 to be embedded in the concrete panel portion 4 may be bent to make it hard to come off from the concrete. The thin precast concrete plate B constructed as described above is installed on the existing concrete, and the upper portion of the main reinforcement 1 and the like is tightly connected to the beam reinforcement and is erected at the upper portion, and the remaining reinforcing bars necessary for the wall are arranged and the separator is formed. A weir plate 7 is erected through the line 6. A wall is constructed by placing concrete between the concrete panel portion 4 of the precast concrete plate B and the dam plate 7. The thin precast concrete plate used in the present invention has the above-mentioned structure, and is formed by combining the truss reinforcements composed of the main reinforcement and the corrugated diagonal reinforcements to form a frame. Since the shape of the frame body can be retained by itself, the work of arranging the wall reinforcement and the concrete placing work is easy. Further, since the truss reinforcement in which the two main reinforcements are fixed by the corrugated oblique reinforcement is used, the number of parts is small and the manufacturing can be performed easily and inexpensively. When constructing the wall, the barrier plates facing each other can be easily and accurately attached by using the separator attaching portion at the intersection of the main bar and the oblique line of the thin precast concrete plate.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a truss bar in a manufactured state. FIG. 2 is a perspective view of a thin precast concrete board. 3A to 3C are perspective views of truss muscles, showing modified examples. FIG. 4 is a partial perspective view of a thin precast concrete board. FIG. 5 is a partial perspective view of another example of a thin precast concrete board. FIG. 6 is a cross-sectional view when building a wall. [Explanation of Codes] A ... Truss bar, B ... Thin precast concrete plate 1 ... Main bar, 2 ... Wave diagonal bar, 3 ... Reinforcing bar, 4 ... Concrete panel part, 5 ... Separator mounting part, 6 ... Separator, 7 ... Dam plate .

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Toshiyuki Yoshimatsu               Kashima, 1-2-7 Moto-Akasaka, Minato-ku, Tokyo               Construction Co., Ltd. (72) Inventor Yutaka Morita               Kobayashi, Niisato-mura, Seta-gun, Gunma (No street number) (72) Inventor Shin Saito               2515 Kasaku Village, Nitta District, Gunma Prefecture                (56) References JP-A-59-199933 (JP, A)                 JP-A-58-24051 (JP, A)

Claims (1)

(57) [Claims] (A) A truss bar fixed by interposing a corrugated oblique bar between two parallel main bars, the truss bar is arranged so as to stand up in the width direction, assembled in a square shape, and concrete is poured.
One of the parallel main bars is embedded in the concrete panel part, the other main bar is projected from the surface of the concrete panel part, and the separator mounting part is projected at the intersection of the projected main bar and diagonal bar. A concrete board is built in a predetermined position, and (B) after arranging wall reinforcement on the protruding truss reinforcement side, a weir board facing through the separator attached to the separator attachment portion is erected, and thin wall precast concrete A method for constructing a wall using a thin precast concrete plate, which comprises placing concrete between the plate and the weir plate.