JPH09281268A - Nuclear power plant turbine building construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need for a large-sized crane and to enable the installation of machines and equipment without being affected by the weather by mounting and operating an overhead traveling crane in an early period. SOLUTION: The steel frames, walls and roofs, etc., 16 which are main columns 5 and main beams 6 constituting a turbine building 1 of an atomic power plant are assembled in precedence to the floors and walls constituting thereof. The overhead traveling crane 14 is mounted on traveling rails 18 from the initial stage of the turbine building construction and is effectively utilized at the time of construction. The circumferences of the steel frames are covered with lighting covering sheets or panels 17 and roofs are installed, by which the influence of rain, wind, snow and outdoor temp. is lessened and the construction work is executed in a short period of time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method for a turbine building of a nuclear power plant constructed in a nuclear power plant.

[0002]

2. Description of the Related Art A conventional construction method for a turbine building of a nuclear power plant will be described with reference to FIGS. 7 and 8A to 8C. FIG. 7 is a process diagram showing the relationship between the number of months and the construction work of the main process and the electrical work for explaining an example of the conventional construction method of the turbine building of the nuclear power plant. FIG.
Is a schematic cross-sectional view for explaining the conventional construction method of a turbine building of a nuclear power plant by dividing it into stages, and (a) is a state of excavation of the ground (GL) to mat construction and initial construction work, (B) shows the state of the mechanical / electrical equipment carried in by the large lifting machine, and (c) shows the state of the turbine building after the operation of the overhead crane.

As shown in FIG. 7, in order to construct a turbine building of a nuclear power plant, it is roughly classified into a construction work and a mechanical work. Construction work is on the ground G. There are various building works starting from excavation of L, rock inspection, mat construction. Mechanical work is mechanical
Electrical work, condenser assembly, turbine / generator assembly, adjustment, etc.

The mechanoelectric work is carried out according to the progress of the construction work, and for example, the parallel work is carried out from the work of the turbine generator (T / G) pedestal. The turbine and generator are assembled on the main turbine base using an overhead crane. After assembling and adjusting the turbine generator, fuel is loaded into the reactor inside the reactor building, and the nuclear power plant starts operation (starts operation).

Next, a conventional turbine building construction method will be specifically described with reference to FIGS. 8 (a) to 8 (c). First, FIG.
As shown in (a), generally, after excavating the ground (GL) and performing rock mass inspection (rock mass inspection), the rock mass rock mass 2 is constructed as the foundation of the turbine building, and when the rock mass 2 is deep. In some cases, an artificial rock bed (Man Made Rock; hereinafter referred to as MMR) 3 made of concrete is placed on the rock bed 2 to build the MMR 3 as the foundation of the turbine building 1 and the turbine building 1 Depending on the condition of the bedrock 2 at the construction point, there is a case where they are constructed by a method combining these.

In either case, after the construction of the mat 4 for placing concrete on the bedrock 2 is completed, the main pillars 5 and the main beams 6 are respectively raised from the lowest floor portion as shown in FIG. 8 (b).
Turbine building 1 will be constructed sequentially by the construction work of the surrounding and internal walls and floors.

On the other hand, with regard to the equipment such as the carry-in equipment / pipes 7 installed in the turbine building 1, some of the tanks, heat exchangers, pipes, etc. are installed at a place where the turbine building construction work has not been completed yet, or Although there is a method of carrying in before, such as carrying in to the vicinity, in general, the method of carrying in to the installation site and starting the installation when the construction work is completed to some extent is generally adopted.

In the conventional construction method, the floors and walls of each floor are assembled to some extent in the process of constructing the turbine building from the lower floors to the upper floors one after another, as shown in FIG. As you can see, start the electrical work.

In carrying in and installing equipment such as equipment and pipes into the turbine building in this electrical and electrical work, it is necessary to secure the entire construction period.
As there are many heavy items and the loading area is large,
As shown in (b), the tower crane 8 and the crawler crane 9 are used for loading. Further, such a tower crane 8 and a crawler crane 9 are large-sized hoisting machines, and a gantry 10 is installed for leaning to the turbine building because of its capacity and the limit of the working turning radius.

On the other hand, while the outer peripheral surface of the turbine building was being constructed in sequence, an independent turbine / generator foundation (hereinafter referred to as T / G pedestal) 11 was started up and completed in the central part of the turbine building. Condenser when surrendered to the side
Proceed to 12 assembly work and turbine / generator 13 installation work to complete the construction of the turbine building before loading the fuel.

A traveling rail (not shown) for an overhead traveling crane 14 is installed in the turbine building constructed in this way. The overhead traveling crane 14 is installed on the floor surface of the turbine generator (operating floor; 15) will be built, and after the construction of the wall, roof, etc. 16 above the operation floor 15 is completed, it will be installed and will start operation mainly for assembling turbines and generators.

[0012]

However, the conventional construction method has the following problems. In the conventional construction method of the turbine building of the nuclear power plant, the overhead traveling crane 14 is installed and operated in the latter half of the nuclear power plant construction period, so in order to secure the entire construction period, before operation of the overhead traveling crane 14, It is necessary to prepare a large crane such as a tower crane 8 and a crawler crane 9 for carrying mechanical equipment outdoors.

In addition, when a large-sized lifting machine is installed, a work space for assembling and disassembling it is required. When assembling a large-sized lifting machine, it is relatively easy to secure an assembly space because there are few structures around the large-sized lifting machine installation location, but at the time of dismantling, a building etc. will be built as the construction progresses.
Such a structure would be an obstacle and could not be dismantled.

Further, when the mechanical equipment is carried in, the ground pressure at the installation location of the large hoisting machine increases due to the self-weight of the hoisting machine, the hanging counterweight, etc., so that it is necessary to reinforce it when it is carried out on the gantry.

Generally, large-sized hoisting machines are prepared for construction of turbine buildings and for construction of electric / electrical equipment. In this case, since there is a possibility that interference between the two lifting machines may occur, the adjustment is necessary. Further, since the large-sized lifting machine is installed outdoors, it is greatly affected by the weather. Especially in strong winds, its use may not be possible. In addition, since most of the mechanic equipment such as preceding cargo is carried in before the completion of the turbine building, it is necessary to protect it against rain, wind, etc. after carrying it in.

The present invention has been made in order to solve the above problems, and an iron frame as a main pillar or a main beam constituting a turbine building is assembled prior to a floor or a wall constituting the turbine building, and an overhead traveling crane is constructed. By installing and operating the turbine early, it is not necessary to install a large lifting machine, and by covering the outer wall of the turbine building with a daylighting sheet or panel, the mechanical equipment of the turbine building is not affected by the weather. It is to provide a construction method for a turbine building of a nuclear power plant that can be installed.

[0017]

SUMMARY OF THE INVENTION According to the present invention, a steel frame and a roof serving as main columns and main beams constituting a turbine building of a nuclear power plant are assembled prior to a floor and walls constituting the turbine building, and the turbine is The feature is that an overhead traveling crane is mounted on a traveling rail and operated from the initial stage of building construction.

The present invention uses an overhead traveling crane from the initial stage of turbine building construction for the construction of structures such as the floors and walls of the turbine building and for the installation work of turbines, turbine generators and auxiliary equipment installed in the turbine building. It is characterized by doing.

The present invention is characterized in that the traveling rail of the overhead traveling crane installed from the initial stage of the construction of the turbine building is extended to the outside of the turbine building, and the loading area is installed outside the turbine building.

According to the present invention, the steel frame serving as the main pillars and main beams constructed as described above is used to permanently or temporarily install a floor on which a vehicle can be loaded within an operating range of an overhead traveling crane, and a loading area is a turbine building. It is characterized by being installed inside.

The present invention is characterized in that the outer wall of the turbine building is covered by using the steel frame which is the main pillar or the main beam constructed as described above. The present invention is characterized in that the outer wall of the turbine building is covered with a daylighting sheet or panel.

The main pillars and the main beams that form the turbine building of the nuclear power plant, the roof, and the roof are assembled prior to the floor and the walls that form the turbine building, and the turbine building overhead traveling crane is installed and operated early. As a result, it is not necessary to install a large-sized hoisting machine used in the conventional construction method, and thus the above-mentioned problems relating to the large-sized hoisting machine can be solved.

On the other hand, in order to unload (or receive and handle) the carried-in goods, the traveling rail of the overhead traveling crane is extended to a position where the unloading is possible, and the unloading (or receiving and unloading) area is set to the turbine. Installed outside the building, or by using the main pillars and the main frame that make up the turbine building, the floor that allows the early loading of vehicles, etc., within the operating range of the overhead traveling crane can be installed permanently or temporarily. The above problem can be solved by constructing and installing the load (or load receiving / loading) area inside the turbine building.

Further, regarding the problems related to the influence of weather such as rain and wind, the main pillars and the main beams constituting the turbine building are used to cover the outdoor wall portion of the turbine building with a sheet or panel having good lighting. By doing so, the influence of outside air can be reduced.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of a construction method for a nuclear power plant turbine building according to the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 is a process diagram for explaining the construction method according to the present embodiment, which is shown corresponding to FIG. 8. The difference between Fig. 1 and Fig. 8 is that the all-weather steel erection is performed before the rock inspection, and the overhead traveling crane is installed and operated at the time of the rock inspection, and at the same time, the mat construction is performed. At the same time as the mat work, equipment and piping will be loaded in advance, and floor, wall, building work and T / G pedestal installation work will be performed in parallel. In addition, the condenser and the turbine / generator assembly / adjustment process will be carried out, but the mechanical and electrical work will be carried out in parallel with the preceding loading of equipment and piping.

FIG. 2 shows a turbine building under construction constructed by the process of FIG. 1, and is shown in FIGS. 3 (a), 3 (b) and FIG.
(A) and (b) are for explaining along with the turbine building construction process of FIG. 1, FIG. 3 (a) is a state after the steel frame construction is completed, and FIG. 3 (b) is an overhead traveling crane installation completion FIG. 4A is a schematic cross-sectional view showing a state after the completion of the installation of the mechanical and electrical equipment and a state after the completion of the mechanical and electrical work, and FIG. 2 to 4, the same parts as those in FIG. 9 are designated by the same reference numerals.

In FIG. 2, reference numeral 1 is a turbine building under construction,
Reference numeral 2 is a bedrock, and 3 is an MMR placed on the bedrock 2, which is shown integrally with the bedrock 2. A mat 4 is laid on the MMR 3. 5 is a main pillar, 6 is a main beam, 7 is a pipe for carrying-in equipment, 11 is a T
/ G pedestal, 14 is an overhead traveling crane, 16 is a roof, 17
Is a lighting sheet or panel, 18 is a traveling rail, 19 is a unloading area adjacent to the turbine building 1, 20 is a temporary wall and roof of the unloading area.

In this embodiment, as shown in FIG. 3 (a), immediately after the construction of the turbine building 1 is started, the construction of the steel frame to be the main pillars 5 and the main beams 6 constituting the turbine building and the construction of the roof 16 are performed. As it is done, the pickup area 19 is also adjacent. At this time, the steel frames to be the main columns 5 and the main beams 6 may be made of reinforced concrete. Further, a daylighting sheet or panel 17 is provided on the outer wall portion of the turbine building 1 using the main pillars 5 and the main beams 6.

On the other hand, the construction of the turbine building mat 4 is performed after the completion of the erection of the steel frames to be the main pillars 5 and the main beams 6 constituting the turbine building 1, or before completion. 1 and 2, an example in which the mat 4 is placed after the steel frame construction is completed is shown. At this time, the rock inspection has been completed, and the bedrock 2 that forms the basis of the turbine building may be placed with the artificial bedrock (MMR) 3 as described in the conventional construction method.

Next, as shown in FIG. 3 (b), when the main pillar 5, the company beam 6 and the roof 16 constituting the turbine building are completed, a traveling rail 18 is installed, and an overhead traveling crane 14 is mounted on the traveling rail 18. Is up and running. At this time, the traveling rails 18 of the overhead traveling crane 14 are extended to the load-collecting (load-receiving or handling) area 19 installed outside the turbine building 1. In addition, in order to prevent the influence of weather such as rain and wind, the loading area 19 is covered with a temporary wall in the loading area, the roof 20, etc., and a lighting sheet or panel 17 is covered as necessary. .

On the other hand, when the overhead traveling crane operates, the overhead traveling crane 14, as shown in FIG. 4A, is used for the construction work of the structure such as the floor or wall of the turbine building 1 and the carrying-in equipment / pipes installed in the turbine building 1. Carrying in 7 mechanics, etc.,
Used for installation work. In addition, at this time, as shown in FIG. 1, the form of carrying in the mechanical and electrical equipment is that the floor and wall construction work starts in each area of the turbine building interior,
Mainly, equipment and piping are pre-loaded.

In each area of the turbine building, construction work such as floor and wall work is performed, and mechanical and electrical work on the mechanical and electrical work side is started in each completed area. Electrical and electrical work such as equipment installation and pipe laying will be performed in parallel with turbine building construction work in other areas.

Next, as shown in FIG. 4 (a), the T / G pedestal 11 is started up in the central mat portion, and after the completion of the construction of the T / G pedestal 11, the condenser 12 is installed. Then, as shown in FIG. 4 (b), the turbine
The electromechanical work proceeds to the assembly and adjustment of the generator 13, and the work is completed before the fuel is loaded.

Therefore, according to the present embodiment, the turbine, the generator, the condenser, which is constructed and installed in the turbine building structure by the early loading and operation of the overhead traveling crane 14,
It can be effectively used for other installation work from the early stage of construction, and the use and cost of large lifting machines can be reduced. Also,
It is possible to reduce external influences by covering the exterior wall of the building using the main columns and main beams that make up the building.

Next, FIGS. 5 (a), 5 (b) and 6
A second embodiment of a nuclear power plant turbine building according to the present invention will be described with reference to (a) and (b). In FIGS. 5 and 6, the same parts as those in FIGS. 2 and 4 are designated by the same reference numerals, and the description of the overlapping parts will be omitted.

FIG. 5 (a) is a state after the steel frame construction is completed in the second embodiment, FIG. 5 (b) is a state after the overhead traveling crane 14 is similarly mounted on the traveling rail 18, and FIG.
FIG. 6A is a schematic cross-sectional view showing a state of carrying in the mechanical and electrical equipment and starting the mechanical and electrical work from FIG. 5A, and FIG. 6B is a state after completion of the turbine / generator installation.

In FIG. 5A, the loading area floor 21 is installed at the same level as the ground (GL) in the same manner as the completion of the steel frame erection of the main pillars 5, the main beams 6 and the walls, the roof 16 and the like. . The loading area floor 21 is supported by the main columns 5 and the main beams 6. As shown in FIG. 5B, a vehicle 22 such as a truck runs on the floor 21 of the loading area. Carry-on equipment pipes 7 and the like are loaded on the vehicle 22 and run to the inside 23 of the unloading area.

That is, in this embodiment, as in the case of the first embodiment, immediately after the construction of the turbine building 1 is started, the steel frame and the roof 16 which will be the main pillars 5 and the main beams 6 of the turbine building are immediately raised, As shown in FIG. 5B, the traveling rail 18 is installed, and the overhead traveling crane 14 is installed and operated at an early stage.

Next, in the loading area 19 installed outside the turbine building 1, a traveling crane is used as shown in FIG. 6 (a) by utilizing the steel frames which are the main pillars 5 and the main beams 6 constituting the turbine building 1. A unloading area floor 21 that allows vehicles 22 to be loaded into the movable range of 14 from an early stage is constructed by permanent construction or temporary construction. The inside 23 of the loading area extends to the inside of the turbine building 1.

Hereinafter, as in the case of the first embodiment, FIG.
The work shown in (b) will be performed and completed by loading fuel. In the present embodiment, the loading area floor 21 is provided so as to extend inside the turbine building 1 so that the vehicle 22 can travel inside the turbine building 1 so that the carrying-in equipment pipes 7 can be carried. Since the function and effect of are similar to those of the first embodiment, the description thereof will be omitted.

[0041]

According to the present invention, the main pillars and the main beams constituting the turbine building of the nuclear power plant, the roof and the roof are assembled prior to the floors and walls of the turbine building, and the initial construction of the turbine building is completed. Equipped with overhead traveling crane from the stage,
It is possible to use an overhead traveling crane from the initial stage of construction of the turbine building for construction of structures such as floors and walls of the turbine building and installation of turbines / generators and auxiliary equipment installed in the turbine building by operating the turbine building. it can.

This eliminates the need for the preparation and cost of a large-sized lifting machine for carrying in the mechanical and electrical equipment used in the conventional construction method. As a result, the assembly and dismantling space required for the installation of the large-sized lifting machine is reduced. It becomes unnecessary. Further, the interference between the large-scale lifting machine for the turbine building construction work and the electric machinery work will not occur. And the earth pressure at the time of equipment loading is
Only the mechanical equipment and its loading vehicle, or the proof stress at the time of rolling the roller, etc., and therefore the reinforcement of the gantry are not necessary.

When using the overhead traveling crane, in order to unload the cargo, it is necessary to extend the traveling rail of the overhead traveling crane to a position where it can be loaded and construct a temporary wall and roof to prevent rain and wind. An overhead traveling crane inside the turbine building using a main pillar and a main beam that make up the turbine building by installing a unloading (or receiving and handling) area that can prevent the effects of weather, etc. A floor where vehicles can be boarded from the early stage within the operating range will be constructed by permanent construction or temporary construction. As a result, in any case, it is possible to carry out work such as carrying-in / installation work of the electric / mechanical equipment without being affected by weather such as rain and wind.

Further, by using steel frames which are main pillars and main beams constituting the turbine building, the turbine building outdoor wall portion is covered with a covering sheet or panel, etc. to carry out the work inside the building and carry-in electrical equipment. In curing, the effects of weather such as rain, wind, and outside temperature can be mitigated. Especially in a cold region, the work environment can be improved because the air can be shielded from the outside air. At this time, it is also possible to work with sunlight by using a covering material with good lighting properties.

[Brief description of drawings]

FIG. 1 is a process diagram for explaining a first embodiment of a construction method for a turbine building of a nuclear power plant according to the present invention.

FIG. 2 is a schematic cross-sectional view showing a turbine building under construction constructed by the process of FIG.

FIG. 3 (a) is a schematic cross-sectional view showing a state after the steel frame is erected by assembling the weatherproof steel aggregate on the rock in the step of FIG.
FIG. 6B is a schematic sectional view showing a state after the overhead crane is completely mounted on the traveling rail.

4 (a) is a schematic cross-sectional view showing a state of carrying in mechano-electric equipment and starting mechanic work in the step of FIG. 1, and FIG. 4 (b) is a schematic cross-sectional view showing a state after completion of installation of the turbine / generator.

5A is a cross-sectional view showing a state after completion of steel frame erection of a turbine building for explaining a second embodiment of a construction method for a nuclear power plant turbine building according to the present invention; FIG.
Is a schematic cross-sectional view showing a state after the overhead traveling crane is completely mounted on the traveling rail.

FIG. 6 (a) is a schematic cross-sectional view showing the state of carrying in mechanic equipment and starting mechanic work, continuing from FIG.
FIG. 3B is a schematic sectional view showing a state after the completion of the turbine / generator installation.

FIG. 7 is a process diagram for explaining a conventional construction method for a nuclear power plant turbine building.

8 (a) is a schematic cross-sectional view showing a state of a mat construction in which a rock building is laid from a rock excavation mat and an initial construction work in the process of FIG. 7, and FIG. A schematic cross-sectional view showing a loading state,
(C) is a schematic sectional view showing a state after the operation of the overhead crane.

[Explanation of symbols]

1 ... Turbine building, 2 ... Bedrock, 3 ... Artificial bedrock (MM
R), 4 ... Mat, 5 ... Main pillar, 6 ... Main beam, 7 ... Carry-in equipment / piping, 8 ... Tower crane, 9 ... Crawler crane, 10 ... Stand, 11 ... Turbine / generator foundation stand (T / G pedestal), 12 ... condenser, 13 ... turbine / generator, 14 ...
Overhead traveling crane, 15 ... Operating floor, 16 ...
Walls, roofs, etc. 17… Lighting sheets or panels, 18… Traveling rails, 19… Loading area, 20… Temporary walls and roofs in the loading area, 21… Loading area floors, 22… Vehicles, 23… Loading Inside the area.

Claims (6)

[Claims] 1. A main pillar and a main beam constituting a turbine building of a nuclear power plant, a steel frame and a roof are assembled prior to a floor or a wall constituting the turbine building, and the ceiling is constructed from the initial stage of the construction of the turbine building. A construction method for a turbine building of a nuclear power plant characterized by mounting a traveling crane on a traveling rail and operating it. 2. The use of an overhead traveling crane from the initial stage of turbine building construction for construction of structures such as floors and walls of the turbine building and installation of turbines, generators and auxiliary equipment installed in the turbine building. The construction method for a nuclear power plant turbine building according to claim 1. 3. The traveling rail of an overhead traveling crane installed from the initial stage of the construction of the turbine building is extended to the outside of the turbine building, and the unloading area is installed outside the turbine building. Construction method for a turbine building of a nuclear power plant. 4. The steel frame serving as the main pillars and main beams constructed as described above is used to permanently or temporarily install a floor on which a vehicle can be loaded within an operating range of an overhead traveling crane, and a loading area is provided inside a turbine building. The method for constructing a turbine building of a nuclear power plant according to claim 1, wherein 5. The method for constructing a turbine building of a nuclear power plant according to claim 1, wherein an outer wall of the turbine building is covered by using the steel frame that serves as the main pillar or main beam that has been constructed. 6. The construction method for a turbine building of a nuclear power plant according to claim 1, wherein an outer wall portion of the turbine building is covered with a daylighting sheet or panel.