JP2716919B2 - Turbine building construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method of a turbine building, and more particularly to a construction method of a turbine building for shortening a construction period.

[0002]

2. Description of the Related Art A turbine building (hereinafter referred to as T / B) 1 to be constructed in a nuclear power plant is usually constructed on a T / B mat 2 at a foundation as shown in FIG. A circulating water pipe (hereinafter CW) connected to the condenser 3 below the T / B mat 2
PWP 4 is buried, and this CWP 4 is surrounded by a man-made rock (Man Made Rock, hereinafter referred to as MMR) 5 which is an artificial rock.

FIG. 7 is a plan view of the T / B mat 2.
It is divided into four sections A, B, C, and D for convenience of explanation, and FIG. 8 is a cross-sectional view of the T / B mat 2 shown in FIG.

The CWP 4 is embedded in the MMR 5 below the B portion of the T / B mat 2. After excavating the site of T / B1, CWP4 is carried in and installed for each spool, and assembling and welding are performed at the installation location, thereby forming CWP4. After the assembly of the CWP 4 is completed, the MMR 5 is cast, and the T / B mat 2 is cast thereon.

Next, a pedestal 6 is set on the T / B mat 2. T / B1 with the pedestal 6 standing
Construction work is underway. Then, the steel frame 7 is constructed on the T / B 1, and an upper floor wall is provided above the operation floor 8. Thereafter, the overhead crane 9 is mounted and assembled before the final construction of the steel frame 7. After assembling the overhead crane 9, an operation test of the crane 9 is performed, and the overhead crane 9 is used for assembling the turbine body 10.

[0006] Finally, after the pedestal 6 has been installed, the condenser 3 is assembled, and the condenser 3 is attached to the turbine body 10.
Connected to

[0007]

However, the portion B in FIG. 7 has to be excavated deeper than the other portions A, C and D in order to bury the CWP 4 in the MMR 5. After the excavation of the part B is completed, the CWP4 is loaded into each spool and assembled. If the assembly of the CWP4 is not completed, the MMR of the part B is required.
5 could not be cast, and during that time T / B of other A, C, D parts
The operation of placing the mat 2 will be delayed.

[0008] Since the CWP 4 is loaded and installed separately for each spool, a large work space is required for assembling, and much labor and time are required for welding work.

[0009] The T / B mat 2 cannot be cast until the MMR5 casting of the portion B is completed.
The installation of the pedestal 6 to be erected on the top was delayed, and as a result, the construction of the steel frame 7, the assembly / test of the overhead crane 9,
Delays occur in the entire construction work such as the assembly of the condenser 3.

[0010] This delay complicates the adjustment of the work schedule between the T / B building side and the machine mounting side of turbine equipment and the like, becomes a critical path in the entire construction period of the nuclear power plant and the like, and is the largest in which the construction period is prolonged. Cause.

The present invention has been made in view of the above circumstances, and provides a construction method of a turbine building which reduces the number of construction steps of the turbine building, shortens the construction period, and improves work safety and efficiency. The purpose is to do.

[0012]

According to the construction method of a turbine building according to the present invention, in order to solve the above-mentioned problem, as described in claim 1, the circulating water pipe under the mat is made large and the turbine building is constructed. The circulating water piping work at the lower part of the mat and the artificial rock setting work around the circulating water piping are started separately in parallel, and the mat part of the pedestal part of the turbine building is completed early.

[0013]

In the present invention having the above structure, the circulating water piping below the mat is made into a large block, and the circulating water piping work under the mat of the turbine building and the artificial rock placing work around the circulating water piping are separately performed in parallel. The pedestal mat of the turbine building will be completed at an early stage, and artificial rock work around the circulating water piping on the building side of the turbine building can be performed without waiting for the completion of the circulating water piping work. Installation and subsequent work can be performed efficiently, and the construction period of turbine building construction can be shortened.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a turbine building (T / B) 11 constructed in a nuclear power plant to which the present invention is applied. FIGS. 2 (A) and 2 (B) show concrete foundations of the T / B 11. Circulating water pipe (CWP) buried in the part
It is the front view and side view which each show the assembly and laying state of 14a. FIG. 3 is a plan view of the T / B mats 12a and 12b. In FIG. 3, for convenience of explanation, the T / B mat 12
a, 12b are divided into four sections, and A1, B1,
Labeled C1 and D1. FIG. 4 shows the T / B mat 12 shown in FIG.
It is sectional drawing which follows the XX line of a and 12b.

In FIG. 1, a T / B 11 is constructed on T / B mats 12a and 12b. T /
The CWPs 14a and 14b are installed below the B mat 12b. The CWPs 14a and 14b are previously divided into two large blocks outside.

The MWPs 15a and 15b as artificial rocks are cast on the CWPs 14a and 14b provided under the T / B mats 12a and 12b and around the CWPs 14a and 14b.
a and 14b are surrounded by the MMRs 15a and 15b.

In FIG. 3, T / B mats 12a and 12
The pedestals 16a and 16b are installed on the b. After the installation of the pedestals 16a and 16b is completed, the condenser 13 is attached and assembled. This condenser 13 has CWP1
4a and 14b are connected.

T / B 11 is a concrete frame or steel frame 17.
The operation floor 18 is provided above the T / B 11. An overhead crane 19 is provided above the steel frame 17.

A turbine body 20 is installed above the condenser 13, and the turbine body 20 is connected to the condenser 13. The steam that has worked in the turbine body 20 is guided to the condenser 13 and is cooled by the condenser 13 to be condensed.

Next, the procedure of the construction process of the turbine building 11 will be described with reference to FIG.

After excavating the site of the T / B 11 and completing the excavation, the CWPs 14a and 14b are carried in and set at predetermined positions by a large-sized hoist, and assembled and welded. In this case, since the CWPs 14a and 14b are pre-assembled outside into two large blocks, the welding work is reduced to one place, and the assembling and welding work at the installation position is reduced and shortened, and the working space is reduced. Vertical MM on the building side of T / B11 using other vacant space
R15a can be cast.

Therefore, during installation, assembly and welding of the CWPs 14a and 14b, the vertical MMRs 15a around the CWPs 14a and 14b (portions A1, C1 and D1 in FIG. 3).
Can be performed simultaneously in parallel. After the completion of the vertical MMR 15a, T / B
The mat 12a is cast and the pedestal mat portion 12a of the T / B 11 can be completed early.

As described above, the placement of the T / B mat 12a in the A1, C1, and D1 portions is performed by the MMR 15 of the CWPs 14a and 14b.
Since the operation can be performed without waiting for the completion of the placing operation b, the operation time can be reduced. Thereby, T / B11 of A1, C1 part
The pedestal mat portion 12a can be completed early.

After the placement of the T / B mat 12a at the A1, C1, and D1 portions in FIG. 3, the pedestal 1 is placed at the A1 and C1 portions.
6a is installed. In parallel with the work of installing the pedestal 16a, the construction work of the concrete frame of the T / B 11 is started. At the end of the construction work, the construction of the steel frame 17 is started, and the upper floor wall is provided from the operation floor 18. Then, before the final construction of the steel frame 17, the overhead crane 19 is mounted and assembled. After assembling the overhead crane 19, an operation test of the overhead crane 19 is performed, and the overhead crane 19 is used for assembling the turbine body 20.

On the other hand, the B1 portion of the T / B mat 12b is
MMR 15b after installation work of CWP 14a, 14b is completed
And then the T / B mat 12b. After the placement of the T / B mat 12b is completed, the pedestal 16b is placed on the B1 portion of the T / B mat 12b.

The installation (standing) of the pedestals 16a and 16b is performed in parallel with the construction of the concrete skeleton of the T / B 11, and after the pedestals 16a and 16b have been installed, the condenser 13 is assembled. Do.

The assembled condenser 13 is connected to the turbine body 20 to complete the installation of the turbine equipment, thereby completing the construction of the turbine building.

[0029]

As described above, according to the construction method of the turbine building according to the present invention, the circulating water piping under the mat is made to be a large block, and the circulating water piping work under the mat of the turbine building and the artificial construction around the circulating water piping are performed. Starting the rock construction work separately and in parallel, the mat part of the pedestal part of the turbine building was completed at an early stage, and the artificial rock placement work around the construction water circulation pipe on the turbine building construction side was completed. Since the work can be performed without waiting for the completion of the construction, the installation of the pedestal and the subsequent work can be performed efficiently, and the construction period of the turbine building can be shortened.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a turbine building to which the present invention is applied.

FIGS. 2 (A) and (B) are a front view and a side view, respectively, showing an assembled / laid state of a circulating water pipe below a mat.

FIG. 3 is a plan view of a turbine building mat according to the present invention.

FIG. 4 is a cross-sectional view of the turbine building mat shown in FIG. 3, taken along line XX.

FIG. 5 is a diagram showing a procedure of a construction process of a turbine building.

FIG. 6 is a sectional view showing a conventional example of a turbine building.

FIG. 7 is a plan view of a conventional turbine building mat.

FIG. 8 is a sectional view of the conventional turbine building mat shown in FIG.
Sectional view along the line.

[Explanation of symbols]

1,11 Turbine building (T / B) 2,12a, 12b Turbine building mat (T / B mat) 3,13 Condenser 4,14a, 14b Circulating water pipe (CWP) 5,15a, 15b Artificial rock (MMR) 6,16a, 16b Pedestal 7,17 Steel frame 8,18 Operation floor 9,19 Overhead crane 10,20 Turbine body

Claims (1)

(57) [Claims] In the construction of a turbine building to be arranged in a nuclear power plant yard, a circulating water pipe below the mat is made into a large block, and a circulating water pipe is constructed below the mat of the turbine building and an artificial rock is poured around the circulating water pipe. The turbine building construction method is characterized in that the pedestal mat part of the turbine building is completed at an early stage in parallel with the start-up of the turbine building.