JPS6346818B2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Field of Industrial Application) The present invention relates to a method of constructing a nuclear power plant building,
In particular, the present invention relates to a construction method for a nuclear power plant building suitable for shortening the construction period.

(Conventional technology) The reactor pressure vessel, reactor containment vessel, etc. are installed in the center of the nuclear power plant building, and equipment and safety devices necessary for reactor operation are located at various locations inside the nuclear power plant building. located in the room. FIG. 11 is an overall side sectional view showing a conventional nuclear power plant building. In the figure, reference numeral 21 indicates a reactor pressure vessel, and a reactor containment vessel 22 that accommodates the reactor pressure vessel 21 is installed on the outer periphery of the reactor pressure vessel. Furthermore, there are concrete walls 23 and ceilings 24 around it.
A large number of rooms 26 are provided, each of which is formed by a floor 25, and equipment, piping, safety equipment, etc. necessary for the operation of the nuclear reactor are arranged in these rooms 26. Most of these pipes are installed penetrating the walls 23, the ceiling 24, and the floor 25, and especially when they are installed near the ceiling 24, the support members for the pipes are installed on the ceiling 24.

When constructing a nuclear power plant with such a configuration, it is customary to begin carrying in and constructing equipment, piping, etc. for the relevant floor after the construction of the walls 23 and ceiling 24 on the required floor is completed. be.

However, this type of construction method has the disadvantage that the construction period is long. Conventionally, in order to shorten the construction period for nuclear power plants, equipment was brought in,
After installation, a method is adopted in which the ceiling 24 of the floor is constructed using a deck plate having trapezoidal irregularities.

FIG. 12 is a sectional view showing a pipe penetrating the ceiling using this construction method. After constructing the wall 23, a deck plate 27 is installed at the ceiling 24 position, and the ceiling 2
If there is a pipe 28 penetrating the pipe 28, the upper half 28a of the pipe 28 is separated and welded to the upper surface of the deck plate 27, and concrete 29 is placed on the upper surface of the deck plate 27. Thereafter, the deck plate portion corresponding to the pipe 28 is cut and removed, and the lower half 28b of the pipe is connected to the upper half 28a.

FIG. 13 is a side view showing a "steel plate for attaching a support member for piping" installed on the ceiling 24. 13th
In the figure, a deck plate 27 is disposed between walls 23, and concrete 29 is placed on the upper surface side of the deck plate 27. A steel plate 30 for attaching a support member for piping is buried in this concrete 29, the deck plate 27 on the lower side of the steel plate 30 for attaching a support member for piping is cut and removed, and a support member 31 for piping is fixed there. ing. A pipe 32 is supported and disposed on this support member 31.

(Problems to be Solved by the Invention) In this construction method, it is difficult to connect the “upper half of the pipe that penetrates the ceiling” or the “steel plate for attaching supporting members such as pipes” and the deck plate. Settings are a problem. That is, since the deck plate must withstand the pouring load of concrete, it cannot be cut and removed until the concrete is cured and its strength is achieved after pouring the concrete. In addition, the poured concrete flows into the space consisting of the "upper half of the piping that penetrates the ceiling" or the "steel plate for attaching supporting members such as piping" and the valley of the deck plate. However, there are disadvantages such as the fact that it is not easy to cut and remove the deck plate.

The present invention has been made in view of the current situation, and its purpose is to attach a welded member such as a steel plate and a deck plate for attaching the upper half of a pipe penetrating the ceiling, or a support member for the pipe, etc. It is an object of the present invention to provide a construction method for a nuclear power plant building that can easily solve the problems and shorten the construction process.

[Structure of the invention]

(Means for Solving the Problem) The present invention provides a deck plate at the ceiling of a building, and welds welding members such as the upper half of piping that penetrates the ceiling to the upper surface of the deck plate. Furthermore, a concrete inflow prevention material is filled into the space formed by this welded member and the valley of the deck plate, and then concrete is poured on the upper surface of the deck plate, and this concrete is cured. After that, the concrete inflow prevention material and the deck plate at the welded part of the welding member are cut and removed.

(Function) According to the present invention, a deck plate is installed at a ceiling position between walls, and a welding material and a concrete inflow prevention material are provided on the deck plate. After that, concrete is poured, but since the concrete does not enter the area of the concrete inflow prevention material, the deck plate can be easily cut and removed.

(Example) Next, as a first example, an example of construction of a pipe penetrating a ceiling according to the present invention will be described in the order of construction using the drawings.

First, the first stage is shown in FIG. In the figure, reference numeral 1 is the wall of the nuclear power plant building, and wall 1 and wall 1
A deck plate 2 is disposed on the ceiling between.

Next, as shown in FIG. 2, the upper half of the pipe 3 is welded to a required position on the upper surface of the deck plate 2. Furthermore, a space 7 formed by the upper half 3 of the pipe and the valley of the deck plate 2 is filled with a concrete inflow prevention material 4 such as glass fiber.

After filling the concrete inflow prevention material 4, concrete 5 is placed on the upper surface of the deck plate 2, as shown in FIG. At this time, since the space 7 is filled with the concrete inflow prevention material 4, the inflow of concrete 5 into the space 7 is effectively prevented. The portion A of the deck plate 2 is the portion that will be cut and removed in the next step.

Next, as shown in FIG. 4, when the poured concrete 5 has reached a certain level of strength after curing, the portion of the deck plate 2 indicated by A in FIG. 3 is cut and removed. At this time, since the upper surface side of the portion of the deck plate 2 to be cut and removed is not filled with concrete 5, the cutting operation is extremely easy.

After cutting and removing the deck plate 2, connect the lower half 6 of the pipe to the upper half 3 of the pipe as shown in FIG.
Finish construction.

Next, as a second embodiment, a construction example of a "steel plate for attaching supporting members such as piping" will be explained in the construction order using the drawings.

First, the first stage is shown in FIG. In the figure, reference numeral 11 is a wall of the nuclear power plant building, and a deck plate 12 is disposed on the ceiling between the walls 11.

Next, as shown in FIG.
A steel plate 13 for attaching supporting members such as piping is welded to a required position on the upper surface. A space 18 formed by the steel plate 13 for attaching support members such as piping and the valley of the deck plate 12 is filled with a concrete inflow prevention material 14 such as glass fiber.

After filling the concrete inflow prevention material 14, concrete 15 is placed on the upper surface of the deck plate 12, as shown in FIG. At this time, since the space 18 is filled with the concrete inflow prevention material 14, the inflow of the concrete 15 into the space 18 is effectively prevented. Part B of the deck plate is the part that will be cut and removed in the next step.

Next, as shown in FIG. 9, after curing the poured concrete 15 and reaching a certain level of strength, the portion of the deck plate 12 indicated by B in FIG. 8 is cut and removed. At this time, since the upper surface side of the portion of the deck plate 12 to be cut and removed is not filled with concrete 15, the cutting operation is extremely easy.

After cutting and removing the deck plate 12, the pipe support member 16 is replaced with a steel plate 13 for attaching support members such as pipes.
The pipe 17 is installed on the supporting member 16, and the construction is completed.

As explained above, according to this embodiment, the inflow of concrete 5 into the space 7 formed between the upper half 3 of the pipe penetrating the ceiling and the deck plate 2, which had been a problem in the past, and Concrete 15 in the space 18 formed between the steel plate 13 and the deck plate 12 for attaching supporting members such as piping
can effectively prevent the inflow of Therefore, the work of cutting and removing the deck plate becomes easy, and the building construction period can be significantly shortened.

〔Effect of the invention〕

As described above, according to the present invention, the setting of various welding members and the deck plate to be welded to the upper surface of the deck plate can be easily resolved, and the construction period can be significantly shortened.

[Brief explanation of the drawing]

1 to 5 are sectional views showing embodiments of the "piping penetrating through the ceiling" according to the present invention in the order of construction, and FIGS. 6 to 10 are sectional views of the "supporting members for the piping, etc." according to the present invention. 11 is an overall side sectional view of a conventional nuclear power plant building, and FIG. 12 is a sectional view showing piping penetrations in a conventional nuclear power plant building. 13 are cross-sectional views showing a steel plate for attaching supporting members such as piping in a conventional nuclear power plant building. 1, 11... Wall, 2, 12... Deck plate, 3... Upper half of the pipe penetrating the ceiling, 13...
...Steel plate for mounting support members such as piping, 4, 14...
...Concrete inflow prevention material, 5,15...Concrete, 7,18...Space.

Claims (1)

[Scope of Claims] 1. A deck plate is arranged at the ceiling of a building, and then a welding member is welded to the upper surface of the deck plate, and a space is formed by the welding member and the valley of the deck plate. The inside is filled with a concrete inflow prevention material that prevents the poured concrete from flowing into the space, and then concrete is poured on the upper surface side of the deck plate, and after this concrete has cured, the concrete inflow prevention material is filled. 1. A method of constructing a nuclear power plant building, which comprises cutting and removing a deck plate at a welded part of a welded material and a welded member. 2. The method for constructing a nuclear power plant building according to claim 1, wherein the welding member is the upper half of a pipe that penetrates the ceiling. 3. The method for constructing a nuclear power plant according to claim 1, wherein the welding member is a steel plate for attaching supporting members such as piping.