JP2005097929A - Building floor structure of nuclear power plant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten a construction period due to being many in works performed at a job site, such as bar arrangement work, form work, concrete placing work, steel frame laying work, and cable laying work, in a building floor structure of an assembled floor structure of an upper-lower two-stage structure constituted on a reinforced concrete floor out of a reinforced concrete beam and H shape steel. <P>SOLUTION: Reinforced concrete 11 is placed on a building underfloor part formed of a steel plate 10. A reinforcing member 13 is arranged for supporting a floor load when placing the concrete. This reinforcing member 13 is formed into a support structure of an apparatus 4 supported on a floor. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a building floor structure of a nuclear power plant accompanying the production of steel for a building structure.

  In the conventional nuclear power plant, for example, the building floor structure of the central control room employs an assembly floor structure provided with cable pits that are three-dimensionally orthogonal to the control panel in parallel and at right angles to ensure cable system separation. Yes.

  The cable pit part has a two-stage structure divided into an upper part and a lower part. The lower part is defined by a reinforced concrete beam provided at a constant pitch, and the upper part is defined by an H-shaped steel fixed on the reinforced concrete beam. .

System separation in the cable pit is physically separated by providing horizontal or vertical separation plates as necessary.
Further, the concrete beam and the floor have a reinforced concrete structure composed of reinforcing bars and concrete.

  As the construction method of the reinforced concrete beam, after the reinforced concrete floor is completed, the steel frame and the reinforcing bar are arranged on the floor, the formwork is assembled, and the concrete is placed in the formwork, and the steel frame and the reinforcing steel are included. There is a method in which a reinforced concrete beam is manufactured in the factory or on-site, mounted on the floor after the floor bar arrangement is finished, and then the concrete is placed.

  FIG. 6 shows a conventional nuclear power plant building with a reinforced concrete structure, which is composed of a reinforced concrete beam integrally formed with the floor as a supporting member of a device and a steel beam joined to the upper part of the reinforced concrete structure. It is a conceptual diagram of an assembly floor.

  In FIG. 6, reference numeral 1 denotes a floor made of reinforced concrete, and a steel beam 3 made of H-shaped steel is fixed to an upper part of a reinforced concrete beam 2 formed integrally with the floor 1 and used as an assembly floor structure. Reference numeral 4 denotes a structure supported on the steel beam 3. 5 is a floor board, 6 is a carpet.

FIG. 7 is a conceptual diagram of system separation of the assembly floor shown in FIG.
The cable pit in the assembly floor has a two-stage structure of the upper part and the lower part, the lower part is a pit of the reinforced concrete beam 2 provided at a constant pitch, and the upper part is a steel beam 3 fixed on the reinforced concrete beam 2 at a constant pitch. It is configured.

If the system division is different at the intersection of the lower pit and the upper pit, the horizontal separation plate 7 is provided at the lower part of the steel beam 3 to perform physical separation, and the part that requires physical separation in the lower pit and the upper pit Is provided with a vertical separation plate 8 for separation.
After laying the cable on the floor, the tile-like floor board 5 is spread on the upper part of the steel beam 3, and further the carpet is spread on the floor board 5.

  The lower structure of the central control room assembly floor in the conventional nuclear power plant building is configured to install the reinforced concrete beam 2 on the reinforced concrete floor 1, so that the reinforcement work, formwork, concrete work, steel laying work, There are many work to be done at the site such as cable laying work, and the construction period of the building will be extended including the equipment work to be carried out after the building frame is completed.

  Therefore, as a building structure that can be manufactured in a factory and can reduce local construction work, a modular construction method is considered in which the building structure is made of steel and the building block and equipment are integrated. There are few building floor structures utilized, and a concrete and effective building floor structure using the building main structural material is desired.

  The present invention uses the main structural material of the building in the nuclear power plant building, where the building structure is partly made of steel. An object of the present invention is to provide a building floor structure for a nuclear power plant with improved workability.

  In order to achieve the above object, the invention according to claim 1 is a steel plate, reinforced concrete placed on the steel plate, a stud attached to the steel plate to maintain the strength of the floor, and a concrete placement attached to the steel plate. It is composed of a reinforcing member that supports the floor load at the time, and the reinforcing member is used as a support structure of an apparatus.

  The invention according to claim 4 is a steel plate, reinforced concrete cast on the steel plate, a steel plate disposed on the reinforced concrete, a stud attached to maintain the strength of the floor, and It consists of a reinforcing member that is joined to the upper and lower steel plates of reinforced concrete and supports the floor load at the time of placing the concrete, and the reinforcing member serves as a support structure for equipment.

  According to the building floor structure of the nuclear power plant of the present invention, the main construction material of the building can be used to reduce the local work, reduce the amount of local work, shorten the construction process, reduce the temporary structure, and improve the workability. Can be planned.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description of the embodiment, the same parts as those in the conventional building floor structure shown in FIGS. 6 and 7 are denoted by the same reference numerals, and detailed description thereof is omitted.

Fig. 1 shows the building floor structure of a nuclear power plant building structure in which the under floor is made of steel and is composed of reinforcing bars, studs, and reinforcing members attached to steel plates to ensure the strength of the floor concrete. It is explanatory drawing of the 1st Embodiment of this invention made into the lower pit structure beam of an assembly floor.
The reinforcing member is a steel material that supports a steel plate and has a role of supporting a building load.

As shown in the figure, in this embodiment, the building floor 1 of the nuclear power plant is constituted by the steel plate 10, and the reinforced concrete 11 is placed thereon to constitute the building floor 1.
A stud 12 is attached to the steel plate 10 in order to maintain the strength of the building floor 1 composed of the steel plate 10 and the reinforced concrete 11, and a reinforcing member 13 is attached to support the floor load at the time of placing the concrete.

Of the stud 12 and the reinforcing member 13, the reinforcing member 13 is extended to a required height on the floor 1 so as to be used as a constituent member of the assembly floor lower pit.
The control panel 4 is supported on the steel beam 3 fixed on the reinforcing member 13.

In the present embodiment, the reinforcing bar 13 is laid with a normal reinforced concrete structure on the steel plate 10. However, in order to ensure the continuity of the reinforcing bar 14, the reinforcing member 13 is provided with a through-hole 15 A for reinforcing bars. Processing at the factory.
Further, the through-hole opening 15B such as the buried electric conduit 16 is similarly processed at the factory.

FIG. 2 is a diagram showing a second embodiment of the present invention.
As shown in the figure, in the present embodiment, in a building floor structure made of steel consisting of a steel plate 10, a reinforcing member 13 and a stud 12, the basic structure is attached to maintain the strength of the floor 1 made of the steel plate 10. Among the reinforcing members 13 attached to secure the strength of the stud 12 and the floor 1 and to support the floor load at the time of placing concrete, the reinforcing member 13 is used on the floor 1 in order to use it as a constituent member of the lower pit of the assembled floor. It is extended to the required height.

The control panel 4 is supported on the steel beam 3 fixed on the reinforcing member 13.
In the present embodiment, the reinforcing bar 14 is laid in a normal reinforced concrete structure on the steel plate 10, but the reinforcing bar 14 is bent in the vicinity of the reinforcing member 13 and attached to the reinforcing stud 17 attached to the reinforcing member 13. By fixing, it is not necessary to form a through-hole for reinforcing bars in the reinforcing member 13 while maintaining the strength of the floor 1.
The opening of the penetrating part such as the buried conduit 16 is processed at the factory.

FIG. 3 is a diagram showing a third embodiment of the present invention.
As shown in the figure, in the present embodiment, in a building floor structure made of steel consisting of a steel plate 10, a reinforcing member 13 and a stud 12, the basic structure is attached to maintain the strength of the floor 1 made of the steel plate 10. Among the reinforcing members 13 attached to secure the strength of the stud 12 and the floor 1 and to support the floor load at the time of placing concrete, the steel beam 3 is used in order to use the reinforcing member 13 as a constituent member of the lower pit of the assembled floor. It is used as a support member that receives

The lower part of the steel beam 3 is embedded in the reinforced concrete 11 of the floor 1 to form a lower pit of the assembly floor.
The control panel 4 is supported via a steel frame 18 fixed on the steel beam 3.

  Also in the present embodiment, the reinforcing bar 14 is laid in a normal reinforced concrete structure on the steel plate 10, but in order to ensure the continuity of the reinforcing bar 14, the reinforcing member 13 has a through hole 15A for the reinforcing bar 14. Are processed at the factory.

Further, as in the second embodiment, the reinforcing bar 14 is bent in the vicinity of the reinforcing member 13 and fixed to the reinforcing stud 17 attached to the reinforcing member 13, thereby increasing the strength of the floor 1. It is possible to prevent the reinforcing member 13 from forming a through-hole for reinforcing bars while keeping it.
Further, the buried electric wire pipe 16 piped in parallel with the reinforcing member 13 is at the height at which the reinforcing member 13 is arranged, and the buried electric wire pipe 16 piped in parallel with the steel beam 3 is at the height at which the steel beam 3 is arranged. Since the pipes are respectively piped in two directions, the buried electric pipes 16 in two orthogonal directions can be piped without penetrating the reinforcing member 13 or the steel beam 3. Therefore, it is not necessary to provide a through hole for the buried conduit 16 in the reinforcing member 13 or the steel beam 3.

FIG. 4 is a diagram showing a fourth embodiment of the present invention.
As shown in the figure, in the present embodiment, in a building floor structure made of steel consisting of a steel plate 10, a reinforcing member 13 and a stud 12, the basic structure is attached to maintain the strength of the floor 1 made of the steel plate 10. Among the reinforcing members 13 attached to secure the strength of the stud 12 and the floor 1 and support the floor load at the time of placing the concrete, the reinforcing member 13 is laid directly under the floor surface to ensure the strength of the reinforced concrete 11 of the floor 1. It extends to the lower part of the arranged reinforcing bar 14 and is used as a part of the support structure.

The control panel 4 is supported via steel beams 3 and 20 joined by insert connectors 19 directly above the reinforcing member 13.
In the present embodiment, since a gap is provided between the floor surface and the reinforcing member 13 and the reinforcing bar 14 is laid between them, it is not necessary to form a through hole for reinforcing bar in the reinforcing member 13.
The through-hole openings 15B such as the buried electric conduit 16 are processed at the factory.

FIG. 5 is a diagram showing a fifth embodiment of the present invention.
As shown in the figure, in the present embodiment, in a building floor structure made of steel consisting of steel plates 10a, 10b, reinforcing members 13 and studs 12, the basic structure is attached to maintain the strength of the floor 1 made of the steel plate 10a. Among the reinforcing members 13 attached to secure the strength of the stud 12 and the floor 1 and support the floor load at the time of placing the concrete, the reinforcing members are joined between the steel plates 10a and 10b provided above and below the reinforced concrete 11. The steel beam 3 constituting the lower pit of the assembly floor is joined to the upper part of the reinforcing member 13.
The control panel 4 is supported via the steel beam 3 and the steel beam 20.

In the present embodiment, since the upper and lower sides of the reinforced concrete 11 are composed of the steel plates 10a and 10b reinforced with strength members, there is no need to arrange the reinforcing bars in the concrete, and therefore the reinforcing members 13 are arranged. There is no need to form a through hole for the muscle.
However, the buried conduit 16 and the buried conduit opening 15B are processed at the factory.

  As described above, according to the embodiment of the present invention, the building main structural material can be used as the assembly floor lower pit component, and the floor of the central control room and the assembly floor in the nuclear power plant building are modularized. Can be manufactured at the factory.

  As a result, work that has been done on site such as assembly floor components, embedded conduits, and cable processing boxes until now is a minor work such as the connection between modules. It is possible to reduce the amount of on-site construction work because the procedure is carried out promptly at the same time, shortening the construction period of the nuclear power plant building and reducing the on-site construction cost.

Also, the factory production of the nuclear power plant building can be modularized by manufacturing the pipes arranged in the enclosure including the assembly floor, improving quality and ensuring work safety.
Furthermore, it is possible to reduce temporary structures such as temporary columns for supporting the steel frame inside the concrete beam during the construction, and it is possible to reduce the main structural material of the building and the amount of the supporting structural material.

The front view which shows the 1st Embodiment of this invention. The front view which shows the 2nd Embodiment of this invention. The front view which shows the 3rd Embodiment of this invention. The front view which shows the 4th Embodiment of this invention. The front view which shows the 5th Embodiment of this invention. The front view which shows the building floor structure of the conventional nuclear power plant. The perspective view which shows the principal part of the building floor structure of the conventional nuclear power plant.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Floor, 2 ... Concrete beam, 3, 18, 20 ... Steel beam, 4 ... Control panel, 7 ... Horizontal separation plate, 8 ... Vertical separation plate, 10 ... Steel plate, 11 ... Reinforced concrete, 12 ... Stud, 13 ... Reinforcement Member, 14 ... Reinforcement, 15A ... Through-hole, 15B ... Opening of penetrating part, 16 ... Buried conduit, 17 ... Reinforcing stud, 19 ... Insert connector.

Claims (4)

  A steel plate, reinforced concrete placed on the steel plate, a stud that is attached to the steel plate and maintains the strength of the floor, and a reinforcing member that is attached to the steel plate and supports the floor load when placing the concrete. The building floor structure of a nuclear power plant, characterized in that it is a supporting structure of   2. The building floor structure of a nuclear power plant according to claim 1, wherein a reinforcing bar and a reinforcing member of reinforced concrete are fixed.   The building floor structure of a nuclear power plant according to claim 1, wherein the reinforcing member and the steel beam supporting the device are joined by a connector. Steel plates, reinforced concrete placed on the steel plates, steel plates disposed on the reinforced concrete, studs attached to maintain the strength of the floor, and steel plates above and below the reinforced concrete are joined, and concrete A building floor structure for a nuclear power plant, comprising a reinforcing member for supporting a floor load at the time of placing, wherein the reinforcing member is used as a support structure for equipment.

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