JP3027430B2 - Construction method of nuclear power plant building, building module and nuclear power plant building - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the construction of a nuclear power plant, and in particular, manufactures a part other than a concrete skeleton of a nuclear power plant building as a building module in a factory in advance and uses the building module as a formwork. TECHNICAL FIELD The present invention relates to a method for constructing a nuclear power plant building in which concrete is poured, a building module used for the method, and a nuclear power plant building constructed by the method.

[0002]

2. Description of the Related Art In a conventionally known method of constructing a nuclear power plant, equipment, pipes and the like are transported after the floor and walls of a building are completed. All of these operations are on-site operations and have been carried out with a huge amount of input and labor. The recent construction work of nuclear power plants requires drastic reductions in construction time and costs due to various types of power and labor conditions. Further compression is required. In recent years, construction workers engaged in the local construction period have become more difficult to gather, and the quality of construction workers has deteriorated. What is needed is to turn to factory work whenever possible.

Under such technical background, as many parts as possible other than the concrete skeleton of a nuclear power plant building are manufactured in advance as a building module at a factory, and concrete is poured using the building module as a formwork. A method for constructing a nuclear power plant building has been proposed.

[0004] For example, in the "method of constructing a prefabricated structure" described in Japanese Patent Application Laid-Open No. 62-111040, a prefab unit in which a side structure and a lower structure are attached to an upper structure of a nuclear power plant building is formed. At the same time, install various equipment inside it to manufacture building modules,
A method of suspending the concrete on a pre-constructed concrete body having an opening at the upper surface or on a concrete floor surface and placing concrete using a building module as a formwork has been adopted. In this method, the building module itself is used as a concrete formwork, so that the building module manufacturing process by factory work and on-site construction work can be performed simultaneously and concrete on the wall and ceiling can be poured simultaneously. Therefore, the construction period of the reactor power plant building can be shortened, and by installing various equipment inside the building module in advance, the on-site installation process can be shortened, thereby significantly shortening the construction period of the reactor power plant building Is possible.

[0005] Further, in the "method of constructing a nuclear power plant" described in Japanese Patent Application Laid-Open No. 63-31931, a steel plate serving as a formwork of a frame and a concrete frame is formed except for a portion to be a floor of a nuclear power plant building. Is introduced. This method also has the same effect as the above-mentioned prior art by using the prefab module itself as a concrete formwork and installing various devices in the prefab module in advance. However, in this conventional technique, since the floor surface is not integrated with the module, a duct and a tray that can be attached to the wall and the ceiling,
Except for some pipes, they cannot be unitized in a module and installed in advance.

[0006]

As described above, in the prior art, the construction of a reactor power plant building is performed by using a building module or a prefab module manufactured in a factory in advance as a formwork to cast concrete. The construction period can be shortened. However, none of the above prior arts takes into account the bonding strength between a building module and a concrete frame cast using the building module as a formwork, and the reliability and safety of a reactor power plant building are not considered. Was not enough. That is, in each of the above-mentioned prior arts, the outer surface of the module is covered with an iron plate in order to use the building module or the prefab module as a mold, and the cast concrete is held in surface contact with the iron plate surface. Become. Therefore, the bonding strength between the concrete skeleton and the module was not sufficient, and the strength of the reactor power plant building itself was reduced, which was inappropriate in terms of measures against earthquake resistance.

An object of the present invention is to shorten the construction period of a concrete skeleton of a nuclear power plant building, reduce the on-site mechanical element installation process, and further improve the reliability of the nuclear power plant building. An object of the present invention is to provide a construction method, a building module used for the construction method, and a nuclear power plant building constructed by the construction method.

[0008]

To achieve the above object, the present invention relates to a method for constructing a nuclear power plant building,
With placing the iron plate on the inside of steel frames in buildings, iron plate
The part other than the part corresponding to the steel frame is connected to the steel frame.
A box-shaped structure modularized by installing mechanical elements installed in the room of a nuclear power plant building in a prefab unit exposed from the outside of the building as a building module is manufactured in advance in a factory, and Is installed on site using large lifting equipment, and concrete is cast using the steel plate placed inside the steel frame as a concrete formwork.

Here, preferably, in manufacturing the building module, a prefab structure including a steel frame and an iron plate is applied to the floor of the building module.
More preferably, an air vent is provided on the iron plate of the building module, and the concrete is filled while discharging air from the air vent at the time of placing concrete.

[0010] Also, preferably, when concrete is cast using the iron plate of the building module as a concrete formwork, it is connected to an adjacent building module with an iron sleeve for piping guide and fixed in advance. The sleeve is also used as a formwork separator when casting concrete.

Further, in order to achieve the above object, the present invention provides the above-mentioned building module in which all mechanical elements are installed, and a nuclear power plant building constituted by using this building module.

[0012]

When a building module is manufactured in a factory, an iron plate is placed inside a steel frame and the iron plate is
Of the parts other than the part corresponding to the steel frame,
By manufacturing a prefabricated unit that is exposed to the outside from between the bone frames ,
Concrete on the iron plate exposed outside from between the bone frames
While but bind, so that the steel frames in buildings located outside of the steel plate mold is bonded to bite into the concrete
Therefore, the holding of the building module by the concrete skeleton becomes strong. Therefore, the strength of the nuclear power plant building itself is also improved, and the reliability and safety of the nuclear power plant are improved.

[0013] By applying the prefabricated structure including the steel frame and the iron plate to the floor of the building module, in addition to mechanical elements such as ducts, trays, and piping that can be mounted on walls and ceilings, equipment and piping installed on the floor. All of the mechanical elements including those can be unitized in the module and installed in advance, and by installing them in the manufacturing process at the factory, the reliability and the safety of work are improved. In addition, the prefab structure of the floor surface is also arranged with the iron plate inside so that a space is formed below the iron plate floor surface and concrete is filled into this space, so that the connection between the concrete frame and the building module is further strengthened. It will be. Here, by providing air vents on the iron plate of the building module, particularly the iron plate of the floor portion, the concrete is poured into the space below the floor surface without gaps when the concrete is poured.

An adjacent building module is connected and fixed in advance with an iron sleeve for piping guidance, and the sleeve is also used as a form separator when placing concrete, so that the form separator can be set. Related man-hours are saved.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the construction method of the present invention is shown in FIGS.
This will be described with reference to FIG. First, a building module used in the building method of the present embodiment will be described with reference to FIGS. FIG. 1 shows a building module 20 constituting a room of a nuclear power plant building. Inside the nuclear power plant building, quite large mechanical elements such as equipment and piping are installed. The building module 20 of the present embodiment includes:
As shown in FIG. 1, the mechanical elements such as the equipment 3 and the piping 4 are connected to a steel frame 1 and an iron plate 2 serving as a concrete formwork.
It is modularized by being installed in a prefabricated unit composed of. This building module 20
Before transporting the nuclear power plant building to the construction site and installing it, the concrete body that will be the main body of the building is manufactured separately as a unit at the factory or local temporary factory. In manufacturing the building module 20, a prefab structure including the steel frame 1 and the steel plate 2 is applied to the floor of the module, and all the mechanical elements including the equipment 3 and the piping 4 installed on the floor are unitized and pre-installed. Keep it.

FIG. 2 shows an overall view of a concrete formwork composed of a steel frame 1 and an iron plate 2 of a building module 20, and FIG. 3 shows the building module of FIG. 2 as viewed from the front. In the building module 20, the prefab structure including the steel frame 1 and the iron plate 2 is applied to the floor of the module as described above. The steel frame 1 of the module is made of H-shaped steel and is designed to sufficiently bear the weight of the module itself and the mechanical elements housed therein. Further, iron plates 2, walls, beams, to serve as a concrete formwork when the concrete to each part of the ceiling is pouring, steel frames 1 as shown
It is fixed and installed on the inner surface of the. In this case, the iron plate 2
Part corresponding to steel frame 1 (fixed part to steel frame)
The other parts are exposed outside from between the steel frames 1
I have. Further, in order to ensure the discharge of air during concrete casting, a concrete formwork made of an iron plate, in particular, an iron plate 2 of a hydraulic drive circuit section is provided with a plurality of small holes for air bleeding, not shown.

As described above, the building module 2
Conventionally, by applying a prefabricated structure consisting of a steel frame 1 and an iron plate 2 under the floor of a module and manufacturing equipment, piping, trays, ducts, supports, and other mechanical elements in advance, The installation work of these machine elements in the room, which had been performed at the construction site of the power plant,
Since it is implemented in the prefab module manufacturing process at a factory or a local temporary factory, it can improve reliability, improve work safety, eliminate the shortage of local workers, and improve product reliability. For this reason, the operation on the machine side can be brought forward, and the construction period can be shortened.

Next, a method of constructing a nuclear power plant using the building module 20 will be described with reference to FIGS. FIG. 4 shows a situation where the building module 20 is lifted down and carried into the construction site of the nuclear power plant building by a lifting device. As shown in this figure, in the manufacturing process of a building module at a factory or a local temporary factory, when assembling the prefab unit, equipment, piping, trays,
By installing the mechanical elements such as the duct and the support in advance, the installation work of these mechanical elements, which has been conventionally performed at the construction site of the nuclear power plant, becomes unnecessary in the field work.

FIG. 5 shows a situation where the building module 20 has been carried into the construction site of the nuclear power plant building. The position of the building module 20 is adjusted, and the installation position is determined.

If the building module 20 is used, the prefab module composed of all the mechanical elements and the building elements constituting the room of the nuclear power plant building does not have a concrete frame, so that a large-sized lifting equipment is used for the nuclear power plant. It can be installed on building construction sites.

In a nuclear power plant, when the pipe 4 is arranged across a plurality of chambers, an iron sleeve for guiding the pipe through the concrete body is provided. The two ends of the iron sleeve 7 are fixed to the iron plate 2 by welding between the adjacent building modules 20, and the iron sleeve 7 is used to prevent the deformation of the mold when casting concrete in the conventional method. Used as a substitute for the separator. By using the sleeve 7 for guiding pipes as a mold separator in this way, the man-hours involved in setting the separator by the conventional method can be saved. Also, since both ends of the sleeve 7 are welded to the iron plate 2,
The effect of preventing the deformation of the mold is greater than the reinforcement by the conventional separator.

FIG. 6 shows a situation where the concrete 6 is cast using the building module 20. In the construction method using the building module 20, the prefabrication unit is also used as the concrete formwork, so that the assembling and dismantling work of the concrete formwork, the scaffolding material, and the retaining work, which are indispensable in the conventional concrete placing work, are omitted. . However, at the time of concrete filling, it is preferable to apply an end seal to the welded portion of the iron plate 2 to prevent leakage of concrete from the formwork. Further, in a portion where there is no other building module at an adjacent position, the outer formwork is set as before.

When the concrete 6 is poured, the concrete 6 is poured from the upper part of the building module 20 by filling the concrete 6 with an air vent provided in a concrete form made of an iron plate. It is injected into the space between the constructed concrete frame and the wall between the building modules and the space under the floor without gaps. At this time, the base of the equipment inside the room is also formed of an iron plate formwork or a PC formwork, and if the air vent is provided above the iron plate formwork, the base of the equipment can be formed at the same time.

In the construction method using the building module 20, the concrete form of this module is much more excellent in strength than the concrete form used in the conventional construction method. Can be increased.

In the building module of this embodiment, when the concrete frame is cast,
Concrete 6 is joined to the iron plate 2 exposed from the outside
Meanwhile, in the write useless bites into steel frames 1 child Nkurito 6 disposed on the outside of the steel plate mold 2 as described above sintered to
Therefore, the holding of the prefab module by the concrete skeleton becomes stronger than in the conventional construction method. Therefore, the strength of the nuclear power plant building itself is improved, and the reliability and safety of the nuclear power plant are also improved. In addition, since the iron plate is also arranged inside the prefab structure on the floor surface, the space formed below the iron plate floor surface is filled with the concrete 6, so that the bonding strength between the concrete skeleton and the building module is further improved. effective.

In addition, since the iron plate formwork 2 is arranged inside the frame structure of the steel frame 1, the concrete surface is not exposed to the interior of the room, so that post-treatment of the concrete surface is not required. This has the effect of reducing the number of steps.

Further, in the prefab module in which the steel plate formwork is disposed outside the steel frame structure, the steel frame structure is exposed on the inner surface of the room, so that dust is generated during the construction work and the plant operation. Although there was a risk that the equipment inside the building of the nuclear power plant would be adversely affected by dust, the structure in which the steel plate form 2 was disposed inside the frame structure of the steel frame 1 was adopted in this embodiment. Since the inner surface of the chamber is made of a flat iron plate, it is not necessary to consider the adverse effects of dust adhesion.

Further, since the iron plate formwork 2 is disposed inside the frame structure of the steel frame 1, the iron plate formwork 2 is exposed on the wall surface inside the room when the concrete frame is completed. By using as a substitute for the embedded metal, the embedded metal is completely unnecessary by using it for the support base of the pipes, ducts and trays. Therefore, the setting work of the embedded hardware, which has conventionally led to complicated piping work, is omitted, and the construction process can be shortened. Further, since the iron plate form 2 is disposed on the inner side of the frame structure of the steel frame 1 so that the iron plate form 2 is exposed on the wall surface inside the room, the installation position of the support can be freely set. Significant time savings can also be realized for the annoyed designer.

Further, as described above, the deformation of the mold can be effectively prevented by using the sleeve 7 for guiding the pipe, whose both ends are welded, as a mold separator for preventing deformation.

Next, an application example of the present invention will be described with reference to FIGS. 7 to 11 based on the layout of a nuclear power plant.

FIG. 7 shows a layout of the third basement floor of a nuclear power plant reactor building. The application area of the building module on this floor is a CUW pump room area 8, a CUW non-regenerative heat exchanger area 9, a scrum solenoid fuse room A10, a scrum solenoid fuse room B11, and a CRD pump room 12.

FIG. 8 shows the layout of the second basement floor of the reactor building of a nuclear power plant. The area where the building module is to be applied on this floor is the CUW regenerative heat exchanger area 13.

FIG. 9 shows a layout of the first floor above the reactor building of a nuclear power plant. The application area of the building module on this floor is the MS tunnel room area 14.

FIG. 10 is a view showing the nuclear power plant reactor building 4
It shows a floor layout. The application area of the building module on this floor is the RIP (B) blower area 15 and the RIP (A) blower area 16.

FIG. 11 shows a layout of the fourth floor above the reactor building of a nuclear power plant. The area to which the building module on this floor is to be applied is the refueling control room area 17.

[0036]

According to the present invention, it is arranged inside a steel frame.
Since utilizing the iron plate as a formwork, the concrete after casting, co iron plates exposed to the outside from between the steel Frames
While Nkurito binds, steel frames in buildings located outside of the steel plate mold is bonded to write useless bite into concrete
Therefore, the holding of the building module by the concrete skeleton becomes strong. Therefore, the strength of the nuclear power plant building itself is also improved, and the reliability and safety of the nuclear power plant are improved.

Further, since the iron plate formwork is located inside the steel frame, the concrete surface is not exposed to the interior of the room, so that post-treatment of the concrete surface is not required. There is.

Further, since the iron plate formwork is located outside the steel frame, the iron plate formwork can be used as an embedding metal, and there is no restriction on the mounting position of the supports, and the equipment due to the adhesion of dust is removed. Can also reduce the adverse effects on
This has the effect of improving the reliability of the plant.

Further, since the prefabricated structure including the steel frame and the iron plate is applied to the floor of the building module, all the mechanical elements can be unitized in the module and installed in advance. Installation improves reliability and work safety.

In the prefab structure of the floor surface, a space is formed below the steel plate surface by arranging the iron plate inside so that the space is filled with concrete. It will be more robust.

Further, an iron plate of a building module,
In particular, since the air vent is provided on the iron plate on the floor portion, the concrete is poured into the space below the floor surface without any gap when the concrete is poured.

Further, since the iron sleeve for guiding the piping is also used as a mold separator when casting concrete,
The man-hour for setting the form separator is saved, and the effect of preventing the form from being deformed is large.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a building module used for constructing a nuclear power plant building according to one embodiment of the present invention.

FIG. 2 is a perspective view showing an entire configuration of a concrete formwork including a steel frame and an iron plate in the building module shown in FIG.

FIG. 3 is a front view of the building module shown in FIG. 2;

FIG. 4 is a view showing a method of constructing a nuclear power plant building according to one embodiment of the present invention, showing a situation where a building module is lifted using a large lifting equipment and is carried into an installation site.

FIG. 5 is a view showing a step following the step shown in FIG. 4 and shows a situation when the building module is carried into the installation site.

FIG. 6 is a view showing a process following FIG. 5, showing a situation where a building module is carried into an installation site, and after installation, concrete is poured and cured to complete a block of a nuclear power plant building.

FIG. 7 is a diagram showing a layout of a building module application planned area on the third basement floor of a nuclear power plant reactor building.

FIG. 8 is a diagram showing a layout of a building module application planned area on the second basement floor of a nuclear power plant reactor building.

FIG. 9 is a view showing a layout of a building module application planned area on the first floor above the reactor building of a nuclear power plant.

FIG. 10 is a diagram showing a layout of a building module application planned area on the fourth floor above the reactor building of a nuclear power plant.

FIG. 11 is a diagram showing a layout of a building module application planned area on the mezzanine floor above the reactor building of a nuclear power plant.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel frame 2 Iron plate 3 Equipment 4 Piping 6 Concrete 7 Steel sleeve for piping guidance 20 Building module

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masami Kubo 3-1-1, Sachimachi, Hitachi-shi, Ibaraki Pref. Hitachi, Ltd. Inside the Hitachi Plant (72) Kaneo Goto 3-1-1, Sachimachi, Hitachi-shi, Ibaraki 1 Hitachi, Ltd. Hitachi Plant (72) Inventor Shigemi Mikami 3-1-1 Sachimachi, Hitachi City, Ibaraki Prefecture Hitachi, Ltd. Hitachi Plant (72) Inventor Toshiaki Yoshinaga Toshiaki Hitachi City, Ibaraki Prefecture JP-A-63-35931 (JP, A) JP-A-1-244039 (JP, A) JP-A-58-199951 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04G 21/14-21/18 G21C 13/00

Claims (6)

(57) [Claims] [Claim 1] placed Then together the iron plate on the inside of the steel frames structure
A portion of the iron plate other than a portion corresponding to the steel frame.
A prefabricated unit that is exposed to the outside from between the steel frames is modularized by installing mechanical elements installed in the room of the nuclear power plant building, which is manufactured in advance at a factory as a building module, and A method for constructing a nuclear power plant building, characterized in that a large lifting machine is used to install on site, and concrete is cast using an iron plate placed inside a steel frame as a concrete formwork. 2. The nuclear power plant building according to claim 1, wherein a prefabricated structure including the steel frame and an iron plate is applied to a module floor when manufacturing the building module. Construction method. 3. A method for constructing a nuclear power plant building according to claim 1, wherein an air vent is provided on an iron plate of said building module, and concrete is filled while discharging air from said air vent when placing concrete. A method for constructing a nuclear power plant building, characterized in that: 4. The method for constructing a nuclear power plant building according to claim 1, wherein when the concrete is cast using the iron plate of the building module as a concrete formwork, a pipe for guiding piping between adjacent building modules is provided. A method for constructing a nuclear power plant building, characterized in that the sleeve is connected and fixed in advance with an iron sleeve, and the sleeve is also used as a formwork separator when casting concrete. 5. An iron plate, which also serves as a concrete formwork, is disposed inside a steel frame, and the steel frame of the iron plate is provided.
Parts other than the parts corresponding to the structures are removed from between the steel frames.
A building module characterized in that all the mechanical elements installed in the room of a nuclear power plant building are installed in a prefabricated unit exposed to the side and modularized. 6. A nuclear power plant building comprising: the building module according to claim 5; and concrete in which the iron plate of the building module is cast as a formwork.