JP3559673B2 - Plant building and construction method of the building - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a construction technique for a plant building.
[0002]
[Prior art]
The building of the nuclear power plant includes a central control room as a room.
[0003]
The floor, walls, and ceiling of the main control room have a reinforced concrete structure, and a large number of bases, channel bases, control panels, cable trays, cables, and air conditioning ducts and lighting equipment are located on the ceiling. It is a critical path for the construction process.
[0004]
FIG. 2 shows a sectional view of the central control room 1 in the conventional method.
[0005]
That is, concrete is poured into the floor 3 and the side wall 4, and at that time, the bracket 9 is fixed to the side wall 4 as a receiving stand of the receiving beam, and the deck plate receiving beam 8 and the deck plate 10 of the roof are set. The suspended scaffolding 23 is supported, and then, on the floor surface, construction of the base 13, the channel base 17 and the cable tray 14, and on the ceiling portion, construction of the air-conditioning duct 19, lighting equipment 20 and light ceiling 21. In addition, the upper part has a sequence of placing reinforced concrete.
[0006]
In the conventional construction method, a ceiling slab has a deck plate structure, a concrete for the floor and walls is cast, a temporary steel beam is installed on the ceiling, and a deck plate is set thereon.
[0007]
Next, the temporary suspension scaffolding for ceiling construction is set using the receiving beams, and then the concrete placement work of the foundation base, the channel base and the cable tray construction work on the floor, and the ceiling on the suspension scaffolding Various types of construction, such as air conditioning ducts and lighting equipment construction, and reinforcement of ceiling slabs and concrete placing work on the upper surface of the deck plate are performed by wrapping.
[0008]
After the completion of the above construction, the central control panel is set to be carried in for the first time after finishing the interior of the central control room.
[0009]
Next, after the central control panel is set, cabling work is performed, and then power can be received from the main system through a sequence test.
[0010]
In order to avoid such various types of construction laps, as disclosed in Japanese Patent Application Laid-Open No. 4-293864, the entire room is converted into a room module including the internal equipment except for the concrete part, and the room is converted into a room module. There is a construction method in which the module is suspended in the installation position of the room. However, the construction method using this room module is as follows: (1) A bird cage is formed by using a permanent or temporary steel column, wall, upper steel ceiling beam, and lower steel ceiling beam that constitute the room, and then the room is formed. It is a modular construction method in which building components such as equipment, reinforcing bars, deck plates, etc. are added to the construction. For this reason, on the upper floor and lower floor of this room module, the steel frame part consists only of columns or walls, and there is no steel frame upper beam or lower beam that constitutes the module. Disappears. Therefore, the room module can be formed only every other floor, and it is impossible to greatly reduce the number of steps as compared with the conventional method.
[0011]
(2) As the size of the room increases, the size of the room module increases, and in addition, it becomes difficult to connect the room module to the lower floor of the floor.
[0012]
For this purpose, Japanese Patent Application Laid-Open Nos. 57-5289 and 8-86037 disclose examples in which only the ceiling portion of a room is modularized to facilitate installation. According to those known examples, the module of the ceiling portion is prepared in advance by forming a module structure in which ancillary structures such as pipes and ducts attached to the ceiling in addition to beams, reinforcing bars and deck plates constituting the ceiling are integrated. After the concrete wall of the room is solidified and the concrete is solid enough, the ceiling module structure is suspended by a crane and mounted on the deck that protrudes into the room from the side wall surface. Concrete is poured on the plate to build a room inside the plant. However, although this module method contributes to the reduction of man-hours in the field, it can not be a drastic measure to shorten the process, although it has some advantages over the conventional method.
[0013]
[Problems to be solved by the invention]
The main control room is generally installed on the upper floor of the outer periphery of the reactor building, and many facilities are installed in a predetermined space.
[0014]
For this reason, the area delivery time (completion time) from the building frame construction side is late, and after the area delivery, the sequence test from equipment work such as air conditioning and lighting, control panel setting, electrical work such as cable tray and cabling, and power reception is performed. This is a critical path for the construction process.
[0015]
As a measure to improve the above, temporary suspension scaffolding is set from the ceiling to reduce the work by upper and lower lap work, and the upper air conditioning duct and lighting work in parallel with the lower control panel foundation work In the example of the construction of the ceiling slab, the work process is severely digested, and the number of temporary facilities such as suspension scaffolds is increasing, and it is difficult to adjust the work efficiency, work environment and safety.
[0016]
Further, in the method using the room module, as described above, the upper floor and the lower floor of the room module have to adopt the conventional method, so that a significant reduction in the number of steps cannot be expected, and the installation work is more difficult. Can be
[0017]
In that respect, in the example where only the ceiling is modularized, the difficulty of the installation work can be solved, but the ceiling module can not be installed unless the side wall surface of the room is completed to the same level as the main installation strength evaluation It was necessary to make a high-strength receiver for receiving the ceiling module from the top and side walls. For this reason, the time for installing the ceiling module is delayed, and the time for installing devices such as a control panel that is installed on the floor inside the room is delayed. Moreover, if the room is surrounded by the side wall, it is difficult to carry in the equipment to be installed on the floor of the room into the room.
[0018]
Therefore, it has been demanded that the ceiling module be installed before the side wall surface of the room is completed to shorten the construction process.
[0019]
An object of the present invention is to shorten a construction process when constructing a plant building using a module structure.
[0020]
[Means for Solving the Problems]
In order to achieve the above object of the present invention, a plant building of the present invention has a ceiling structural material in an area defined by a ceiling, a floor, and side walls constructed in the plant building, and equipment and facilities attached to the ceiling. The module structure integrated with comprises a steel frame which is a part of the column in the area as a component member of the module, and a lower end of the steel frame is provided on at least one of the floor and a part where the side wall of the area is installed is provided with a configuration that is coupled to the upper end portion of the other steel as the rest of the post, the construction method of the present invention employed when making such a structure is built building plant A module structure that integrates a ceiling structural material in an area defined by a ceiling, a floor, and side walls, equipment and facilities attached to the ceiling, and a steel frame that is a part of a pillar in the area, and forms the module structure. Things the down hanging the area by the crane, the lower end portion of the steel, the floor, and sidewalls of the region provided on at least one part which is installed in the other steel as the rest of the column A method of constructing a plant building connected to an upper end portion and supporting the module structure with the another steel frame .
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows a sectional view of a reactor building 2 of a nuclear power plant constructed by applying the present invention.
[0022]
That is, the reactor building 2 generally has a lower floor and an upper floor with the boundary of the ground level GL, and the room of the central control room 1 in the reactor building 2 is installed on the upper floor around the building outdoors. Is done.
[0023]
FIG. 3 shows a bird's-eye view of the module structure 26 on the ceiling of the room in the central control room 1. The module structure 26 previously assembles a vertical roof steel frame 7 which is a support member to be a part of a steel column and a horizontal receiving beam 8 integrally in a yard of a construction site in advance, and an upper surface of the receiving beam 8. Air conditioner duct 19, lighting equipment 20, light ceiling 21, buried piping 24, buried conduit, which is a device attached to the ceiling with the assembly of the roof steel frame 7 and the receiving beam 8 as a support point. 25. Further, a module to which the upper reinforcing bar 11, which is a component of the ceiling, is attached is laid. In making this modular structure, ancillary structures, such as the lighting equipment 20, which are arranged between the support beams 8, span the support 22 between the support beams 8 and are attached to the support 22, and the load is transmitted through the support 22. And the light ceiling 21 is not subjected to a load.
[0024]
While the ceiling module structure 26 is being made in the yard of the construction site, the floor 3 is constructed, and after the floor 3 is cast into concrete, the column steel frame 6 which is another supporting member that becomes a steel column on the side wall of the room. Is installed vertically. In FIG. 3, reinforced concrete or unreinforced concrete is constructed around the column steel frame 6 so that the upper end portion of the column steel frame 6 is exposed.
[0025]
Next, as shown in FIG. 4, the module structure 26 is suspended by a large lifting machine 27 at a predetermined position on the ceiling roof of the central control room 1, and the roof steel frame 7 and the column steel frame 6 are mechanically connected by the bolt joint 12. Then, a steel frame construction process of mechanically connecting the lower end of the roof steel frame 7 and the upper end of the column steel frame 6 in series to complete a series of columns up and down is performed.
[0026]
When the upper floor is further constructed, the lower end of the upper steel column is connected to the upper end of the roof steel frame 7 with a bolt joint 12 facility, and a modular structure previously created for the upper floor at the upper end of the steel column. The lower end of the object's roof steel frame is connected with a bolt joint to construct a vertically adjacent story.
[0027]
In this way, the module structure 28 is supported by the column steel 6. In order to realize the support, the strength of the column steel frame 6 and the roof steel frame 7 is designed by the permanent strength evaluation, and may be designed by the temporary strength evaluation. In any case, the column steel structure 6 and the roof steel structure 7 have the strength required to support the module structure 26 without relying on reinforced concrete or unreinforced concrete.
[0028]
The permanent strength evaluation referred to here is to give the evaluated strength by performing not only load calculation but also seismic calculation assuming that it is a building strength member, and temporary strength evaluation is It means that the evaluated strength is given by performing only the load calculation without considering it.
[0029]
When only the strength of the temporary strength evaluation is given, the column steel and the roof steel are simply buried in the concrete, and reinforced concrete containing many reinforcing bars is used from the viewpoint of expecting various strengths in the concrete.
[0030]
After the column steel frame 6 and the roof steel frame 7 are joined, the upper part can be supported by those steel frames. Therefore, the rooms on the higher floors can be constructed in succession, or if there is no room on the upper floor, A rooftop is built above the modular structure.
[0031]
Alternatively, after connecting the column steel frame 6 and the roof steel frame 7, the construction of the foundation 13 in the central control room 1 and the construction of the side wall may be translated to shorten the process.
[0032]
Alternatively, a device such as a control panel 18 to be installed on the floor of the room before the side wall surface of the room is made of reinforced concrete is carried into the room when there is no side wall surface, and the installation of the device and the concrete pouring of the side wall surface are performed. The process may be shortened in parallel with the construction work.
[0033]
Alternatively, the wall work for making the side wall surface of the main control room 1 made of reinforced concrete, the installation work of the equipment such as the control panel 18 in the main control room 1 or the installation work and the setting work of the channel base 17 necessary for the installation are performed. The construction process may be shortened by performing the processes in parallel.
[0034]
In this way, using a permanent or temporary steel frame consisting of pillars, walls, and ceiling beams and stacking modules with equipment and building components on each floor of the building, the building can be replaced with the conventional method. In this case, the equipment is started up much faster, the installation of the installation equipment in the central control room 1 is accelerated, and the test of the equipment is also accelerated.
[0035]
If it is desired to shorten the process by earliering the time for loading the installation equipment into the main control room 1 and paying attention to the fact that the main control room 1 is made to face the outside of the reactor building, After the side walls of the main control room 1 have been combined with the roof steel frame 7, the installation equipment can be externally passed through the large opening while the large opening without the side wall is present on the side. You may bring in quickly.
[0036]
When performing roofing work involving placing concrete on a deck plate, since the deck plate will not affect the work below the deck plate, for example, work on the floor, the upper and lower sides of the deck plate Since the construction can be performed at the same time, the process can be shortened.
[0037]
FIG. 4 shows a state in which the module structure 26 according to the present embodiment is suspended at the ceiling position of the central control room 1 and carried into the outer peripheral portion of the reactor building 2 using the large-sized hoisting machine 27.
[0038]
In the construction method of the present embodiment, in the construction of the ceiling part, a steel frame member is assembled, and the air conditioning duct 19, the lighting equipment 20, the reinforcing bar 11, the buried piping, and the like are incorporated into the building member to integrate the building frame member and the system equipment. The module structure 26 thus obtained is suspended by a large lifting machine 27 after waiting for the construction of the column steel frame 6 and connected to the upper end of the column steel frame 6 to be set at once. Equipment 20, rebar 11, buried piping, etc. are installed.
[0039]
As a result, the following loading and cabling work of the control panel 1 can be brought forward, and the main event of receiving power or the subsequent system function test can be brought forward, thereby shortening the construction process of the nuclear power plant. .
[0040]
According to the above embodiment, in the construction of the framing of the floor, walls and roof of the main control room, the framing is made into a steel reinforced concrete structure, the steel members are evaluated for their permanent strength, and the ceiling slab is constructed in a deck plate structure. A modular structure used for the construction method of the central control room can be provided, and by using this module structure, the module structure can be brought into the central control room ceiling floor, and the frame structure at the ceiling can be integrated. Thus, the installation work at a predetermined position can be reduced, and the construction process of the nuclear power plant can be shortened. At this time, the steel frame member may be used for temporary evaluation.
[0041]
Similarly, the construction process of a nuclear power plant is implemented by using a permanent construction consisting of pillars, walls, and ceiling beams, or using a temporary steel frame and stacking modules with equipment and construction members added to each floor of the building. Can be greatly reduced as compared with the conventional case.
[0042]
Similarly, the ceiling slab of the central control room is equipped with a deck plate on the receiving beam, reinforcing bars and buried piping on the upper part, and air conditioning ducts and lighting equipment as auxiliary equipment of the ceiling on the lower part. Equipment that can be used for the construction method of the main control room, which has been installed. Installation work can be reduced, and the construction process of a nuclear power plant can be further shortened.
[0043]
Similarly, air conditioning ducts, lighting equipment, etc. installed on the ceiling of the central control room are directly supported using pillar steel and roof steel, which have been fully evaluated for their strength, as the frame structure. We can provide modules used in the construction method, and by using various steel frames for permanent construction evaluation as a part of supporting structural members such as air conditioning ducts, the amount of hardware embedded in concrete on the ceiling is reduced and the efficiency of installation work is improved. Can be planned.
[0044]
Similarly, air conditioning ducts, lighting equipment, etc. installed on the ceiling of the central control room are directly supported using temporary evaluated steel members that are not subject to permanent strength evaluation as frame structures. A modular structure used for the room construction method can be provided, and the roof steel members and the steel members of the receiving beams are temporarily evaluated and used as a part of the support members, thereby reducing embedded hardware and improving the efficiency of installation work. Can be.
[0045]
Similarly, assemble the module structure at the factory or on-site yard, integrate the roof frame structure such as roof steel beams and receiving beams with the air conditioning ducts and lighting equipment, and then place the assembled module at the specified installation position. Can be directly carried in by a large-sized hoist, and the work of carrying in to a predetermined position and the work of installation can be reduced, and the construction process of a nuclear power plant can be shortened.
[0046]
Similarly, assembling the module at the ceiling of the central control room at the factory or on-site, and then directly loading and setting the module at a predetermined position in the building by a hoist, followed by installation of the central control panel and cabling work and The construction process of the nuclear power plant can be shortened by bringing the upper concrete placement work or the like ahead of schedule so as to advance the power receiving time from the main system.
[0047]
Although the embodiment has been described above by taking the main control room in the reactor building of a nuclear power plant as an example, the same construction is performed in other rooms constituting the plant, such as a passage, a pump room, and a heat exchanger room. Technology is applicable.
[0048]
【The invention's effect】
According to the first aspect of the present invention, since the installation of the module structure is easy and the installation of the equipment set in the construction area is quick, the test of the equipment can be carried out earlier, and the plant construction process can be shortened. Building structure can be provided.
[0049]
According to the invention of claim 2, in addition to the effect of the invention of claim 1, further steps of plant construction can be achieved by starting up each floor of the building at an early stage and installing various equipment to be installed on each floor at an early stage. It is possible to provide a plant building structure that can be shortened. According to the third aspect of the present invention, since the installation of the module structure is easy and the installation of the equipment set in the construction area is quick, the test of the equipment can be carried out ahead of time, and the plant construction process can be shortened. Can be provided.
[0050]
According to the invention of claim 4, in addition to the effect of the invention of claim 3, a further step of plant construction is achieved by starting up each floor of the building at an early stage and installing various equipment to be installed on each floor at an early stage. It is possible to provide a method of constructing a plant building that can be shortened.
[0051]
According to the fifth aspect of the present invention, the effect of the third aspect of the present invention can be achieved through a construction process of constructing concrete on a column steel frame during construction .
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a reactor building of a nuclear power plant.
FIG. 2 is a longitudinal sectional view of a central control room in a reactor building of a nuclear power plant according to a conventional method.
FIG. 3 is a bird's-eye view during suspension of a module structure on a ceiling of a central control room in a reactor building of a nuclear power plant by a method according to an embodiment of the present invention.
FIG. 4 is an overall view showing a hanging operation of a module structure on a ceiling of a central control room in a reactor building of a nuclear power plant by a construction method according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Central control room, 2 ... Reactor building, 3 ... Floor, 6 ... Column steel (other supporting members), 7 ... Roof steel frame (supporting members), 8 ... Receiving beam, 10 ... Deck plate, 11 ... Rebar, 12: bolt joint, 13: base, 17: channel base, 18: control panel, 26: module structure, 27: large hoist.

Claims (5)

The module structure integrating the ceiling structural material of the area defined by the ceiling, the floor, and the side walls and the equipment attached to the ceiling is a steel frame that is a part of the pillar of the area. Provided as a component of a module, a lower end of the steel frame is provided on at least one of the floor and a portion where a side wall of the area is installed, and is coupled to an upper end portion of another steel frame which is a remaining portion of the column. A plant building characterized by having the following configuration. The plant building according to claim 1, comprising a structure in which the module structure is installed for each story by coupling between steel frames. A module structure that integrates a ceiling structural material in an area defined by a ceiling, a floor, and a side wall to be constructed in a plant building, equipment attached to the ceiling, and a steel frame that is a part of a pillar in the area. Making, the module structure is suspended in the area by a hoist, and the lower end of the steel frame is provided on at least one of the floor and the part where the side wall of the area is installed, and the remaining part of the column is provided. A method of constructing a plant building, wherein the module structure is connected to the upper end of another steel frame and the module structure is supported by the other steel frame. The method according to claim 3, wherein the construction of the plant building is applied to the construction of a plurality of floors vertically adjacent to the building. The reinforced concrete or the unreinforced concrete is constructed according to claim 3, wherein before the module structure is suspended in the area by a hoist, around the other steel frame, an upper end is exposed, and reinforced concrete or unreinforced concrete is constructed. How to build the building of the plant you want.

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