JPH06299718A - Construction of wall, floor in atomic power plant and wall slab thereof - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a construction method and wall slab of a wall / floor frame in a nuclear power plant facility, which has improved workability, can shorten the construction period, and has improved safety. [Structure] A large thick-walled PC plate A is installed on the lower structure,
A temporary beam or a permanent beam 8 for erection and slab construction is connected between the brackets 3 provided at the upper end portion, and the reinforcing bar 9 is set in the groove-shaped notch portion 5 formed on the side surface of the PC plate to concrete. And the slab reinforcement 10 is arranged along the pedestal surface of the PC plate, and the slab concrete is placed using the temporary beams as supporting work.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wall / floor frame structure in a nuclear power plant facility and a large PC wall slab used for the frame structure.

[0002]

2. Description of the Related Art Conventionally, in this type of construction, a wall reinforcement made by braiding large diameter reinforcing bars in a mesh shape was built in the wall slab, and the wall reinforcements were spliced together to construct concrete to construct a wall. Was.

[0003]

The construction method using the mesh-shaped wall reinforcement made of large-diameter reinforcing bars requires a great deal of time and labor for installing a formwork for wall construction and installing a floor-supporting structure. There was also a problem in terms of construction period and safety. The present invention has been proposed in view of the problems of the above-mentioned prior art, and the object thereof is to improve the workability, shorten the construction period, and improve the safety of work at a nuclear power plant facility. The point is to provide the construction method of the wall / floor frame and the wall slab for the construction of the frame.

[0004]

In order to achieve the above object, according to the method for constructing a wall / floor frame structure in a nuclear power plant facility according to the present invention, a groove-shaped notch is provided at a side end, A large-sized thick-walled PC plate with pedestals integrally erected at the lower end is placed on the lower structure so as to be layered, and the upper ends of the opposite thick-walled PC plates are connected by a temporary beam to assemble and assemble. Slab reinforcement is arranged along the pedestal surface of the thick-walled PC plate, and slab concrete is placed by using the temporary beams as supporting work, and the groove-shaped notch portions of the adjacent thick-walled PC plate are adjacent to each other. The reinforcing bar is set, the joint concrete is placed, and then the above steps are repeated in the lateral direction and the upper direction.

According to a second aspect of the present invention, a plurality of steel brackets for connecting the temporary beams are fixed along the upper edge of a large thick-walled PC plate having wall reinforcements, and a plurality of legs are provided at the lower end. The pillar is hung vertically, and a groove-shaped notch is provided at the side end,
The present invention provides a large-sized thick-walled PC plate used for the above-mentioned construction method, which is formed by forming a cotter on the bottom of the notch.

[0006]

According to the present invention, as described above, a large-sized thick-walled PC plate having a groove-shaped notch at the side end and a pedestal integrally provided at the lower end is formed. The slabs are piled up on the lower structure via the pedestals for holding the erection that are hung from the lower end of the slab, and the slabs are constructed between the upper ends of the thick-walled PC slabs facing each other. Temporary beams are connected to each other to assemble the same thick-walled PC plate, and slab construction space is formed between the upper and lower thick-walled PC plates and between the lower thick-walled PC plate and the lower structure through the pillars.

Then, in the same space, slabs are constructed by arranging slab reinforcement along the surface of the pedestal and placing slab concrete by using the opposing temporary beams between the thick-walled PC plates as supports. On the other hand, the PC plates are integrated by setting a reinforcing bar between the groove-shaped notch portions of the adjacent thick-walled PC plates and placing a joint concrete.

[0008]

The present invention will be described below with reference to the illustrated embodiments. A is a large-sized thick-walled PC plate having a thickness of 30 cm to 150 cm, in which a large-diameter wall vertical line 1 and a horizontal wall line 2 are built in, a bracket 3 is fixedly installed along the upper edge, and a plurality of built-in pieces are provided at the lower end. A holding pillar 4 is vertically provided integrally. Further, a groove-shaped notch portion 5 is provided at the side end portion, and a cotter 6 is provided at the bottom surface of the notch portion 5 so as to prevent shearing of concrete, bearing force by the cotter 6 and shear friction of the wall transverse bar 2. The force is obtained and the joint is integrated.

Reference numeral 7 in the drawing denotes a PC version pedestal support plate for erection. Then, the thick-walled PC plate A is erected on the lower structure of the nuclear power plant building through the pedestal 4 by a large crane. Then, a temporary beam 8 or a permanent beam for slab construction is bridged between the brackets 3 of the thick-walled PC plate A facing each other. In the figure, B is the foundation and C is the ground. (See FIGS. 1 and 2) Reinforcing bars 9 are inserted between the notches 5 of the adjacent thick wall PC plates A.

In the slab S cross section shown in FIG. 2, the wall vertical streaks 1 of the upper and lower thick-walled PC plates A effectively act on the vertical stress by a lap joint, a mechanical joint, or an anchor in the slab of the wall vertical streaks. Are combined as Further, the slab reinforcement 10 is arranged along the surface of the pedestal 4 of the upper and lower thick-walled PC plate A, and the slab concrete is placed by placing the slab concrete by using the temporary beam 8 as the support work, and the adjacent thickness Joining concrete is placed in the notch portion 5 of the wall PC plate A, and the shearing force of the concrete and the shear friction resistance force of the wall transverse bar 2 are integrated to achieve integration. In the figure, 11 is a basic bar arrangement.

According to the above embodiment, since the entire wall thickness of the wall is a PC plate in which the reinforcing bars are embedded, the amount of work of the reinforcing bar assembly and the formwork is almost eliminated. Further, on the floor, the temporary beam 8 which serves as a concrete receiving beam is arranged between the thick wall PC plates A, and the bracket thick wall P serving as a receiving member for the beam is provided.
It is embedded in the C plate, which streamlines on-site work, shortens the construction period, and improves safety.

[0012]

As described above, according to the present invention, since a large-sized thick-walled PC plate in which reinforcing bars are built in the entire wall thickness is adopted and constructed by a large-capacity large-sized crane, the reinforcing bar arrangement and the formwork are performed. As the assembling work is almost eliminated and the pedestal is integrally hung at the lower end of the thick-walled PC plate, the pedestal is used as a plate holding material when the thick-walled PC plate is installed. As a result, work safety is improved. In addition, the slab reinforcement is arranged along the pedestal surface of the upper and lower thick-walled PC plates, and at the time of assembling the thick-walled PC plate, the temporary beams are connected by connecting the upper end portions of the PC plate with the temporary beam. As the supporting work, slab concrete can be poured, and the supporting work for the slab pouring is unnecessary and the workability is improved. Further, reinforcing bars are set between the notches provided at the side ends of the thick-walled PC plates adjacent to each other and the joining concrete is poured, whereby the thick-walled PC
The plates are integrated.

According to the second aspect of the present invention, a plurality of steel brackets for connecting the temporary beams are fixed along the upper edge of a large thick-walled PC plate having wall reinforcements, and a plurality of legs are provided at the lower ends. The pillar is hung vertically, and a groove-shaped notch is provided at the side end,
By forming a cotter on the cutout bottom to form a thick wall slab, a temporary beam that constitutes the support of the slab is bridged between the steel brackets, and also on the grooved cutout bottom of the side end. Since the cotter is provided, the strength and rigidity of the joint portion between adjacent thick-walled PC wall slabs are increased, so that the above-mentioned construction can be reliably performed.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state of implementation of a construction method of a wall / floor frame structure in a nuclear power plant facility according to the present invention, and is an arrow view of FIG.

FIG. 2 is an elevational view showing the shape and reinforcement of the thick-walled PC plate, which is a view taken along the arrow in FIG.

FIG. 3 is a plan view showing an arrangement of thick-walled PC plates.

FIG. 4 is a detailed view of the portion of FIG.

FIG. 5 is a plan sectional view showing details of a portion D in FIG.

FIG. 6 is a plan sectional view showing details of an E portion of FIG.

7 is a view taken along the arrow in FIG.

FIG. 8 is a view from the arrow view of FIG.

[Explanation of symbols]

 A Thick wall PC version B Foundation C Ground S slab 1 Wall vertical reinforcement 2 Wall transverse reinforcement 3 Bracket 4 Pillar 5 Notch 6 Cotter 7 PC version pedestal support plate for erection 8 Temporary beam or main beam 9 Reinforcement Muscle 10 Slab muscle 11 Basic bar arrangement

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Norio Ikeda 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Within Taisei Corporation (72) Inventor Shigeru Kanda 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo No. Taisei Construction Co., Ltd.

Claims (2)

[Claims] 1. A large-sized thick-walled PC plate having a groove-shaped notch at its side end and a pedestal integrally suspended at the lower end, is placed on the lower structure, and is overlaid. Assembling the thick-walled PC slabs by connecting the upper ends of the thick-walled PC slabs with temporary beams or permanent beams, arranging slab reinforcement along the pedestal surfaces of the upper and lower thick-walled PC slabs, and using the temporary beams as slabs for slab concrete. While placing the reinforcing concrete between the groove-shaped notches of the adjacent thick-walled PC plates and placing the joined concrete, the above steps are repeated in the lateral and upper directions. Construction method of wall / floor frame in a nuclear power plant facility. 2. A plurality of steel brackets for connecting temporary beams are fixed along the upper edge of a large-sized thick-walled PC plate having wall reinforcements, and a plurality of stanchions are integrally suspended at the lower end. A wall slab for construction of walls and floor frames in a nuclear power plant facility, which is provided with a groove-shaped notch at the side end and a cotter is formed at the bottom of the notch.