JPS59199933A - Construction of structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] In the rigid frame prefabrication method, shear walls are often constructed using cast-in-place concrete. Therefore, when a seismic wall is placed on the outer periphery, temporary construction work for formwork and reinforcing bars is required.In addition, in recent exterior wall construction, some of the reinforcing bars buried in thin concrete plates called omnia plates were removed from the walls. A non-scaffolding method is being used in which concrete is poured using a PC board that also serves as a formwork and is protruded from the surface of the concrete, and the board is integrated with the poured concrete via the reinforcing bars placed on the Omnia plate. be.

However, when applying the above construction method to the shear walls of reinforced concrete buildings, it is necessary to support the omni version with temporary diagonal supports until the concrete pouring is completed, so reinforcing the shear walls and installing the inner formwork are complicated. there were.

The present invention has been proposed in order to eliminate such drawbacks, and includes setting a PC column and a PC beam in a predetermined position, in which a portion of the cross section is cut by approximately the wall thickness in the direction of the material axis, A thin plate that also serves as a formwork and has reinforcing bars embedded in a thin concrete plate facing the cutout surfaces of the PC columns and PC beams and protruding from the plate surface.
After arranging the C wall plate and installing the inner formwork opposite to the PC wall plate, the inner formwork, the above-mentioned PC column, the PC beam, and the above-mentioned P
This relates to a method for constructing a structure characterized by constructing a shear wall by pouring concrete between the C wall plate and the wall plate.

In the present invention, as described above, the PC column and the PC beam are composed of semi-finished products in which a portion of the cross section is cut out in the axial direction by approximately the thickness of the wall. On the surface,
A PC wall plate that also serves as a formwork and is made of reinforcing bars embedded in a thin concrete plate protruding from the surface of the plate is installed oppositely, and concrete is placed between the PC wall plate and the PC column, PC beam, and inner formwork. Since the shear wall was constructed by pouring concrete, the integrity of the shear wall and the PC columns and beams that form the surrounding frame was improved, and a structure with high structural reliability was constructed. reactor. Furthermore, since the PC wall plate that also serves as a formwork can be directly attached to the PC pillars and PC beams, diagonal supports for temporary construction are not required, improving workability and safety. Furthermore, since the formwork work only involves the inner formwork, there is no need for outer scaffolding. Furthermore, in the case of the rigid frame prefabricated construction method, there is a joint between the frame and the post-cast wall, so post-treatment of the joint was necessary, but with the method of the present invention, the PC wall board can also be used as a formwork. The present invention has many advantages, such as easy joint treatment because there are only joints that are similar to each other, and an excellent design.

The present invention will be described below with reference to the illustrated embodiments.

Figure 1 shows a PC column (1), the outer surface of which is cut out by approximately the thickness of the wall, and a hoop reinforcement (2) and a column main reinforcement (3) protruding from the cutout surface (lα) and the column head, respectively. has been done.

(1') is a PC corner column, the side surfaces of both rows orthogonal to each other are cut out by approximately the thickness of the wall, and from each cutout surface (1'h x 1'C) and the column head, hoop reinforcements (2) and column main reinforcements are formed. (3) is provided protrudingly.

(4) is a PC beam, the side surface of which is cut out by approximately the thickness of the wall,
The - side of the rib (5) is protruded from the same cut surface (4a) and the top cut surface (4) which is cut by approximately the thickness of the slab, and the rib (5) is protruded from the top cut surface (4b). ) is provided at the upper end of the other side thereof to protrude.Furthermore, a beam lower end reinforcement (6) is provided to protrude from the end face of the beam.

(7) is a PC wall plate that also serves as formwork, and a thin concrete plate (8
) A three-dimensional truss reinforcing bar (9) is embedded in the plate and protrudes from the plate surface.
': Therefore, in this method, the PC column (1) PC
Set the corner column (1') and PC beam (4) in the specified position, and place the PC that also serves as formwork opposite the cutout surface (1α) of the PC column (1) and the cutout surface (4α) of the PC beam (4). Wall plate (install force), PCC col column (1 piece cut surface (1'h) (1'C)
Attach an L-shaped PC wall plate that also serves as a formwork (7 pieces) facing the wall, arrange an inner formwork (not shown), and install wall reinforcements (10 pieces).
After arranging the inner formwork and the PC column (1), the PC
A PC wall plate (concrete wall plate 1) that also serves as formwork was placed between the corner column (1 inch) and the cutout surface of the PC beam (4) and the PC beam (4), and was integrated with the above 6 beams and columns. The purpose of this project is to construct a seismic wall.

Conventionally, as shown in Figure 7, the projecting corner was constructed by installing cast-in-place shear walls (5) (y) on both sides of the PG column (a) with one side cut out, but the PC column (α) It was necessary to waterproof the joint between the cutout surface (σ') and the opposite surface and the shear wall (II), but with this method, the cutout PC corner column (1 ') and by arranging an L-shaped PC wall plate (7') that can also be used as an L-shaped tl and 'I frame, facing both cut surfaces (1'h) and (1'C), the conventional method This can solve the drawbacks of

In the figure, α is the target PC floorboard, (I4) is the beam top reinforcement, (15
) is poured concrete on the PC beam (4).

In addition, Fig. 8 shows the PC wall slab (tG) that can be used both as formwork and (tG) that can be used as formwork (indicates the force, and is empty at each predetermined position) buried, and the PC wall plate that can also be used as formwork as
C wall plate (force (force), attaching the joining hardware α force,
Connect the formwork/PC wall slab (7) by screwing the bolt 08) inserted into the oak (16) into the PC column (1) and the PC beam (4). Set it in a predetermined position, weld the reinforcing bar H across the hoop and stirrup and the hardware 07), and then
Several words can be found in the columns (1) and PC beams (4).

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various ways without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

Figures 1, 2, 6 and 4 are PC pillars, PC
Slope view of corner columns, PC beams, and PC wall boards that also serve as formwork, No. 5
FIG. 6 is a cross-sectional plan view and a vertical cross-sectional view showing the main parts of a structure constructed by an embodiment of the method of the present invention, respectively.
Fig. 7 is a cross-sectional plane of the protruding corner part constructed by the conventional method, Fig. 8 is a slope view of the PC wall board that also serves as a formwork, Fig. 9
The figure is a side view of the joint part, and FIG. 10 is a side view showing the attachment part to the PC column and beam. (1)...PC pillar, (1α)...truncated surface, (1')
...PC corner pillar, (1'l!1) (1'C)...
Cut surface, (4)...PC beam, (4a)-... cut surface,
(7)...PC wall plate for formwork, (8)--concrete plate, (9)...three-dimensional truss reinforcement, (11)...concrete), (12+...shake-resistant wall substitute) Patent attorney Shigefumi Okamoto and 2 others) Part I [;
11 Dandai M211Mko Figure 4? Figure 6

Claims (1)

[Claims] P where a part of the cross section is cut out by approximately the wall thickness in the axial direction of the material
Set the C column and PC beam in the specified position, and
A thin PC wall board that also serves as a formwork was installed, with reinforcing bars embedded in a thin concrete board protruding from the surface of the thin concrete board, facing the cutout surface of the C beam, and an inner formwork was installed opposite the PC wall board. A method for constructing a structure, characterized in that concrete is then poured between the internal formwork, the PC columns, the PC beams, and the PC wall plates to construct a seismic wall.