JPH0711199B2 - Nuclear power plant building construction method - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a building construction method for a nuclear plant, and in particular,
The present invention relates to a nuclear power plant building construction method for shortening the construction period of buildings such as a reactor building and a turbine building and reducing the construction cost.

[Technical background of the invention]

Generally, in a nuclear power plant, various buildings such as a reactor building and a turbine building are constructed, and an example of the configuration of a general turbine building is shown in FIG.

Turbine building is the basic structure and its underlying structure A
The operation floor 1 is formed on the upper surface of the steel floor structure 1, and the steel frame structure B is erected on the operation floor 1. In the steel structure B, a large number of steel columns 2 are erected on the operation floor 1 of the substructure A, and a plurality of trusses 3 are installed between the upper ends of the steel columns 2 in the front-rear direction.
The trusses 3 and the steel columns 2 are laterally connected by the beam girders 4. A pair of rail girders 5 are fixed to the inside of the upper part of the steel frame column 2 so as to face each other in the front-rear direction.
Is mounted so that the steel frame structure B can be run vertically and horizontally.

The side wall of the steel structure B is made up of a large number of prefabricated wall plates 7 attached to the outside of the steel column 2, and a deck plate 8 for supporting the roof is laid on the truss 3 to form a bar arrangement. The concrete 9 is poured to form the roof.

In the conventional construction method of the turbine building thus configured, first, the foundation structure A is constructed and the operation floor 1 is completed. Next, the steel frame structure B provided with the overhead traveling crane 6 is erected on the operation floor 1. After that, the side wall of the steel structure B and the roof C were installed.

[Problems of background technology]

However, in such a conventional building construction method, the construction work of the basic structure A → the assembly work of the steel frame structure B → the side wall of the steel structure B and the roof C are sequentially carried out in this order, Each work is continuous in a line and is connected in series.

Therefore, in the conventional method, the period from completion of the operation floor 1 of the substructure A to completion of the steel structure B, its side walls and the roof C is prolonged, which is a critical path for the entire building construction work. That was one of the causes of prolonging the construction period of the nuclear power plant.

Also, during installation work of various mechanical equipment and pipes arranged in the substructure A below the operation floor 1, protection and protection work against wind and rain is required in advance, but for this work , The work had to wait for other work, and the construction was prolonged.

[Object of the Invention]

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a building construction method for a nuclear power plant capable of significantly shortening the construction period, reducing construction cost, and improving work safety. And

[Outline of Invention]

The present invention was made by paying attention to the point that the problem of the conventional construction method was caused by the assembling work of the steel frame structure after the completion of the construction work of the foundation structure, and both these works are performed in parallel. After the operation floor of the foundation structure is completed, the steel frame structure is moved and fixed on the operation floor, which enables the construction period to be significantly shortened, the construction cost to be reduced, and the work safety to be improved. It is characterized by having done.

Example of Invention

An embodiment of the present invention will be described below with reference to FIGS. In FIGS. 1 to 7, the same parts as those in FIG. 8 are designated by the same reference numerals.

The present embodiment is an example of a construction method of a turbine building configured as shown in FIG. 8, and before the predetermined period when the operation floor 1 of the substructure A is completed, the underground portion of the substructure A is First, an assembly site D for backfilling and assembling the steel structure B on the ground adjacent to the substructure A is created, and the assembling work for the steel structure B proceeds in parallel with the construction work for the substructure A.

Next, at this assembly site D, at least a pair of front and rear mounts 10a and 10b are installed in parallel as shown in FIG.

The pair of pedestals 10a and 10b are installed at the same height as the operation floor 1 of the substructure A, and a plurality of pedestals 10a and 10b are provided on each of the pedestals 10a and 10b as shown in FIG. A total of four track rails 11a, 11b of shaped steel are arranged side by side in the front-rear direction at predetermined intervals along the entire length. Furthermore, on each track rail 11a, 11b, a sliding rail 12 on a straight rod with a rectangular cross section is used.
Are fixed to each other, and rectangular stoppers 13 are arranged on the outer wall of each sliding rail 12 in the axial direction at a required pitch over the entire length.

In addition, bolt holes 15 for temporarily fixing the lower end of the steel column 14 are bored in the upper surface of each track rail 11a, 11b at a required pitch in the axial direction.

After that, the steel pillar 14 is suspended by the crane 16 and the third
As shown in the figure, a plurality of steel frame columns 14 are erected and mounted on each sliding rail 12, and bolt holes are inserted through the lower ends of the steel frame columns 14.
By passing the bolt inside 15 and tightening the nut,
The lower end of the steel column 14 is temporarily fixed on each sliding rail 12. By repeating this operation, the truss 3 preassembled on the ground is installed in the front-rear direction between the upper ends of the plurality of steel frame columns 14 erected on the sliding rails 12 to assemble in a gate shape. This gate-shaped steel frame assembly is installed as shown in FIG.
A plurality of a and 10b are provided side by side in the longitudinal direction, and these are connected to a safety rope 17 to prevent the falls. However, at this time, the truss 3 is not erected on the steel frame column 14 standing at approximately the middle portion in the longitudinal direction of the gantry 10a, 10b, and the space portion 18 (see FIG. 5) is formed.

Next, the gate-shaped steel frame assemblies formed of the steel frame columns 14 and the trusses 3 are sequentially connected in the lateral direction by the beam girder steel frames 4 to assemble a cage-shaped steel frame structure B, and at the inner upper portion thereof. As shown in FIG. 4, a pair of rail girders 5 are arranged so as to face each other in the front-rear direction. Thereafter, as shown in FIG. 5, the overhead traveling crane 6 is carried into the steel frame structure B from the space 18 and mounted on the pair of rail girders 5. The assembling work of the overhead traveling crane 6 is performed on the ground in parallel with the rising work of the steel columns 14, and the pair of crane girders 6a are mounted on the pair of rail girders 5 so as to be movable in the lateral direction. A trolley 6b is mounted on the girder 6a so as to be movable in the front-rear direction.

Thereafter, the truss 3 is installed in the space 18 into which the overhead traveling crane 6 and the like have been carried in, and the assembly of the steel frame structure B is completed.

The steel structure B is completed, and the operation floor 1 of the basic structure A, which was performed in parallel with the assembling work of the steel structure B
When is completed, the steel frame structure B is moved to a predetermined position on the operation floor 1 and fixed.

Next, the moving method and the like will be described.

First, on the operation floor 1 of the completed substructure A, the track rails 11a and 11b to which the sliding rails 12 are fixed are respectively extended and laid, and then each steel frame column 14 is installed to each track rail 11a and 11b.
Remove all bolts and nuts and safety rope 17 that were fixed above.

Next, as shown in FIG. 6, the steel columns 14 on each sliding rail 12 are shown.
A jack 19 is interposed between the lower end of the and the stopper 13 and the jack 19 is operated to slide the steel column 14 on each sliding rail 12 to move the foundation structure A as shown by the arrow in FIG.
Steel structure B to the operation floor 1
Position it at the upper predetermined position.

Next, the lower ends of the steel columns 14 are fixed to the operation floor 1 together with the track rails 11a and 11b by using a foundation bolt or the like (not shown). As a result, the steel structure B is erected at a predetermined position on the foundation structure A.

Then, the side wall and the roof C are provided on the steel structure B to complete the turbine building. Therefore, according to this embodiment, the assembling work of the steel structure B is performed in parallel with the construction work of the foundation structure A, so that the construction period can be greatly shortened and the construction cost can be reduced.

Further, since the roof construction of the steel frame structure B can be completed earlier than in the conventional example, when mechanical equipment and piping work is performed in the substructure A below the operation floor 1, these are Since the roof can protect from wind and rain, it is possible to omit the work for protection and protection required in the conventional example, and it is possible to reduce the number of construction steps and improve the work safety.

〔The invention's effect〕

As described above, according to the present invention, the assembling work of the steel frame structure is performed in parallel with the construction work of the foundation structure, so that the construction period can be greatly shortened and the construction cost can be reduced.

Further, according to the present invention, since the roof construction of the steel frame structure can be completed earlier than the conventional example, when performing the mechanical equipment and the piping construction in the foundation structure below the operation floor, Since the roof can be protected from wind and rain by the above roof, the work for protection and protection required in the conventional example can be omitted, and the number of construction steps can be reduced and the work safety can be improved.

[Brief description of drawings]

1 to 7 show a construction process of an embodiment of the present invention, respectively. FIG. 1 is a perspective view showing a process of laying a track rail, and FIG. 2 is an enlarged perspective view of an E portion of FIG. 3 and 4 are perspective views showing a process of assembling a steel column and a truss, FIG. 4 is a front view showing a process of arranging a rail girder in a steel frame structure, and FIG. 5 is a steel frame structure of an overhead traveling crane. FIG. 6 is a front view showing a step of mounting the structure in an object, FIG. 6 is an enlarged front view of an essential part for explaining a moving method when the completed steel frame structure is moved onto the operation floor of the foundation structure, and FIG. 7 is a steel frame structure. FIG. 8 is a front view showing a moving state of an object, and FIG. 8 is a perspective view showing a general structure of a turbine building. A ... Foundation structure, B ... Steel structure, 1 ... Driving floor,
2,14 ... Steel columns, 3 ... Truss, 4 ... Girder steel frame, 5 ...
… Rail girder, 6… Overhead traveling crane, 10a, 10b…
… Mounts, 11a, 11b …… Track rails.

Claims (2)

[Claims] 1. A building construction method for a nuclear power plant, which comprises a construction of a foundation of a building and a foundation structure constituting a lower part thereof, and an assembly of a steel frame structure erected on an operating floor of the foundation structure. A step of assembling the steel frame structure in parallel with the construction work of the foundation structure on the track rail laid from the construction site of the foundation structure to the adjacent land, and after assembling the steel frame structure to the track rail. A method for constructing a building of a nuclear power plant, comprising: a step of moving the steel structure to the foundation structure along with a step of installing the moved steel frame structure on the foundation structure. 2. The method for constructing a building for a nuclear power plant according to claim 1, wherein the assembling work of the steel frame structure includes assembling and mounting work of an overhead crane.