JPH0347351A - Constructing wall of pc board - Google Patents

Abstract

PURPOSE:To improve workability and to increase connecting strength by installing a PC board of which upper part is formed in reduced thickness for being put against a girder to be installed above into a space between adjoining column reinforcements, and by placing concrete thereto after erecting molds for the columns and the girder. CONSTITUTION:A PC board 1 of which upper part is formed in reduced thickness for being put against a girder 2 to be installed above is erected to a space between adjoining column reinforcements 51 and 51 and the lower part of the PC board 1 is fixed to floors 4 and 4A with fasteners 6. Then column molds 52 and 52 are erected surrounding the column reinforcements 51 and 51 and after assembling girder reinforcements 21 and erecting girder molds 22, concrete 8 is placed respectively into the molds 22, 52 and 52 and the PC board 1 is connected to the columns 5 and 5 and to the girder 2. Thereby works for arranging bars for walls and works for installing molds for walls become unnecessary.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a construction method for constructing walls of buildings using precast concrete (hereinafter referred to as PC version).

[Conventional technology]

Construction methods for constructing concrete walls include the so-called conventional method, in which both sides are surrounded by formwork, and concrete is poured between them, and the half-PC method, in which half-PC plates are used to construct concrete walls.
construction method, and a full PC construction method that uses a full PC version.

[Problems to be Solved by the Invention 1N] However, the conventional construction method described above has the problem that not only a large number of formwork carpenters are required since many formworks are used, but the construction period is also long. On the other hand, the half PC construction method has the advantage of reducing the formwork area compared to the conventional construction method, but it still requires formwork for one side of the wall and wall reinforcement work on site. There is a problem. In the full PC construction method, it is difficult to integrate the columns and girders, and it is also difficult to work in parallel with the concrete pouring work for each floor as in the half PC construction method.
There was a problem in that the plate installation process was required as a subsequent process to the structural concrete pouring work. Therefore, it has been desired to develop a construction method that allows walls to be constructed simply and at low cost.

[Means to solve the problem]

The present invention was made in order to solve the problems of the prior art described above, and consists of building a PC plate with a reduced thickness at the upper girder abutting part between adjacent reinforcing bars, and connecting the lower part of the PC plate and the floor. After fixing them with fasteners and erecting a column formwork surrounding the reinforcing bars, assemble the reinforcing bars of the girder and erect the formwork, pour concrete into each formwork, and attach the PC plate to the columns and girders. The present invention provides a method for constructing a wall using a PC board, which is characterized in that it is joined to a PC board.

[Effect]

Since the wall construction method using PC plates according to the present invention has the above-described configuration, when concrete is poured into each formwork, when the concrete hardens, the PC plates are firmly joined to the columns and girders.

【Example】

Next, the present invention will be explained in detail based on an illustrated embodiment. The PC plate 1 used in the present invention has a thickness reduced to approximately 1/2 at the upper portion that contacts the girder 2, and the reinforcing bars 3 buried approximately 1/2 at the top of the full thickness portion are reduced. It projects from the thick end surface 11 at an angle in a direction away from the reduced thickness surface. On the other hand, in the lower part, female screws 13 for connecting and fixing to the floor 4 are buried at several locally formed thin locations (3w locations in this case). After pouring and hardening the concrete to form the floor 4, the column reinforcing bars 51 are assembled at predetermined positions, and the two PC plates 1 having the above structure are attached to the adjacent column reinforcing bars using an appropriate means such as a crane. The opposing side surfaces 12a are in contact with each other at the intermediate portions of the column reinforcing bars 51, and the opposite side surfaces 12b are located at the center portions of the adjacent column reinforcing bars 51, respectively. Then, the lower part of the PC version 1 is fixed to the floor 4 using a fastener 6 such as a bolt having a female screw that can be screwed into the female screw 13 of the PC version 1, and the lower part of the PC version 1 is fixed to the floor 4 so that it can be expanded and contracted from the internal floor of the building. It is stably supported and erected by the constructed support 7 and the like. Next, the column formwork 52 is erected, the girder reinforcing bars 21 are assembled, the girder formwork 22 is erected, the floor formwork 41A for forming the floor 4A of the upper floor is erected, and each formwork is erected. Place concrete 8. When the concrete 8 hardens to form the columns 5 and girders 2, the two PC plates 1 are joined and integrated with the columns 5 and girders 2 in contact with each other. In the case of this embodiment, approximately 1/2 of the connection between the PC plate 1 and the girder 2 is buried in the entire thickness of the PC plate l, and the remaining part is buried in the girder 2.
The joint strength is high because it is a rough joint through the reinforcing bars 3 extending inside the joint. Furthermore, since the walls of the floor under construction are constructed at the same time as the floor 4A of the upper floor is being poured, there is the advantage that construction can proceed extremely efficiently. Incidentally, the joints 12c in the mold direction, which are formed when the side surfaces 12a of the PC plates 1 are brought into contact with each other, and the horizontal joints 12d, which are formed between the end surfaces of the PC plates 1 placed above and below, are sealed in an appropriate process. Ru. Also, PC version 1 construction and column reinforcement 51
You can assemble either one first as long as it does not interfere with the work. The wall provided in one span of the adjacent pillar 5 is
As shown in the embodiment, it can be constructed using two PC versions 1, or it can be constructed using one large PC version 1. By the way, the PC plate 1 to be used may have a structure in which the reinforcing bars 3 are not provided, and the upper reduced thickness surface is provided with an appropriate footer and is formed into an uneven shape so as to be connected to the girder 2.

【Effect of the invention】

As explained above, the method of constructing a wall using PC plates according to the present invention is to erect a PC plate with a reduced thickness at the upper girder contact area between adjacent reinforcing bars, and connect the lower part of the PC plate with the floor. After fixing with fasteners and erecting the column formwork surrounding the reinforcing bars, assemble the reinforcing bars of the girders and erect the formwork, and pour concrete into each formwork to join the PC plate to the columns and girders. Therefore, the only formwork required for pouring concrete is the formwork surrounding the reinforcement bars and the reinforcement bars for the girder, and the wall reinforcement work and the installation of the wall formwork are not required. No work required. Therefore, workability is improved and the construction period is significantly shortened. In particular, if you use a PC plate with reinforcing bars protruding from the reduced thickness end face and connect it to the girder by rough fitting through the reinforcing bars, not only will the strength be significantly improved compared to the case where both the top and bottom are joined with fasteners. Since the work becomes easier, there is a great cost advantage. Furthermore, since it is possible to erect the PC version in parallel with the reinforcing bars and formwork work for columns and beams, there are great advantages in terms of the process compared to the full PC version construction method. Furthermore, if the tiles are placed on the outside of the PC board and the sprayed tiles are finished in advance at a factory, construction can be done without scaffolding, making it possible to construct a solid wall easily and in a short period of time. I can do it.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional plan view showing one embodiment of the present invention, Fig. 2 is a cross-sectional view of A-Alil thereof, and Fig. 3 is a P plate used in one embodiment.
It is an explanatory diagram of C version. DESCRIPTION OF SYMBOLS 1...PC version, 11...Reduced thickness end face, 12a...Side surface, 13...Female screw, 2...Girder, 21...Girder reinforcing bar, 22...Girder formwork, 3... Reinforcing bars, 4.4A... Floor, 41A... Floor formwork, 5... Column, 51... Column reinforcing bar, 52... Column formwork, 6... Fastener 7. ...Support, 8...Concrete. =313 21st! i Figure 1

Claims (1)

[Claims] After erecting a PC plate with a reduced thickness at the upper girder contact area between adjacent column reinforcing bars, fixing the lower part of the PC plate to the floor with fasteners, and erecting a column formwork surrounding the reinforcing bars. A method for constructing a wall using PC plates, which comprises assembling reinforcing bars for girders and erecting formwork, pouring concrete into each formwork, and joining the PC plates to columns and girders.