JPS6113183A - Method of constructing mat for housing of nuclear reactor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to a method for constructing mats for nuclear reactor buildings.

[Technical background of the invention and its problems]

In the construction work of the mat 1 of the reactor building, the ground is first excavated, and then, as shown in FIGS. 3 and 4, the lower end reinforcing bars 3 are constructed as construction side work. Furthermore, construction work
After the reinforcing bars 5 are erected on the lower end bars 3, the lower mat 7
Place concrete and bury the bottom reinforcement 3.

Next, as the machine side I8+, pull the anchor centering mount 9 without setting it on the lower mat 7, and then pull the anchor mount 9 for the pedestal, the mount 13 for the reactor containment vessel mechanism, and the earthquake-resistant nabo 1~/saddle report anchor. The frame 15 is carried onto the lower mat 7.

Each of these frames 11, 13, and 1.5 has foundation bolts 17 and bolts μ-1 to μ-19 attached thereto. Next, each mount 1 is set based on the anchor centering mount 9.
1, 13, and 15, and install them in the predetermined positions.

After each mount 11, 13.15 is installed, an alignment inspection of each mount is performed. After that, as construction work, each pedestal 11,
13. ．． To the bottom of 15? It is covered with a frame, plate wrapped concrete 20 is cast, and each frame is installed and fixed on the lower pine door.

After the curing period for plate-wrapped concrete 20 has elapsed, one template is removed as part of the machine-side work, and then the top reinforcement 21 is laid as part of the construction-side work. After laying the top end reinforcement 21, the machine side work is completed and the template 1 19 was reattached to the foundation port 17.
3] concrete 1~ pour. By pouring concrete 1 to 23 onto the upper pine 1, base bolts 17, each frame 11,
13.15 and upper end muscle 21 are J! I! will be established. After one concrete curing period for the upper mat 23 has elapsed, the reactor containment vessel 25 is installed on the upper mat 23 as mechanical work.

However, in this method of constructing mats for reactor buildings, mechanical work and construction work are performed alternately, so
There is also loss when moving from one construction to the other, so it takes a long time to construct the mat. Furthermore, each mount 11, 13.1
．． 5 Plate-wrapped concrete 1 to 20 are cast for fixing the Zunawara foundation bolts 17.
It takes a long time to pour the concrete, and a curing period is also required. As a result of the above, the construction period for the nuclear power plant will be extended, and the construction of the nuclear power plant will also take a long time.

However, since the work of rolling concrete 1 to 20 is carried out in a narrow space, work efficiency is poor, and even with the utmost care, work safety level 4 (1) cannot be ensured. There is a risk.

(Object of the invention) This invention was made using the above-mentioned 81 fruits as a specialty,
It is an object of the present invention to provide a method for installing pine in a nuclear reactor building that can quickly and easily fix foundation poles and shorten the construction period of the mat.

[Summary of the invention]

In order to achieve the above object, the pine tree construction method for a nuclear reactor building according to the present invention embeds a fixing member when constructing the lower mat, then supports the foundation bolts with this fixing member, and then buries the upper pine tree. The purpose is to construct a mat, bury the foundation bolts described in 1H, and construct a mat.

(Example of the invention) Embodiments of the present invention will be described below based on the drawings.

Fig. 1 is a d1 clear view of a reactor building mat constructed by carrying out an embodiment of the method for constructing a mat for a reactor building according to the present invention, and Fig. 3 shows the mat of this embodiment and the conventional example. It is a nuclear reactor construction process diagram shown for comparison.

The construction work for the reactor building, Matsu 1-30, will begin with excavating the ground as construction work.

After excavating the ground, a lower reinforcement 31 is constructed, and a reinforcement i33 is erected on the lower reinforcement 31. Next, after setting the embedded hardware 35 as a fixing member at a predetermined position, the lower mat 37 is poured with concrete. By pouring concrete into the lower mat 37, the end reinforcing bars 31 and the embedded hardware 35 are buried.

After the concrete curing period for the lower mat 37 has elapsed, the work begins on the machine side. In this machine-side work, first, the anchor centering frame 39 is installed and fixed on the lower mat 37. Next, the anchor frame 41 for the pedestal, the frame 42 for the reactor containment vessel skirt, and the anchor frame 43 for earthquake-resistant 1 Novo-1~ and Zator → Nobo 1~ are carried in. 1) 1 (foundation poles 1 to 45 are removed) to each of these anchor frames 41, 42 and 43, and foundation poles 1 to 4 are installed.
A template 47 is fastened to the upper part of 5. After each anchor frame 41°42.43 is carried in, each anchor frame 41. /12.
43 positioning is performed. After that, each anchor frame 4
1.4.2.43 is welded to the embedded hardware 35, and each anchor frame 41, 42.43 is installed (fixed) on the lower mat 37.

This machine side] After completing the second move, each anchor frame 41°42.
43, carry out the %L alignment U inspection of the foundation poles 1 to 45 that have been placed. Thereafter, remove the template 47 as part of the side 111, and move on to the next building side J]11.

The work on the construction side is the construction work of the end bar 49, and then the installation of the tensile system 1 to 47 as I 1T on the machine side.
Shifting to construction work again, the upper mat 51 is poured with concrete. By pouring concrete into the upper pines i~, each frame 39, 41, 42° 43, upper reinforcement 49, reinforcement WJ 33 and foundation pole 45 are buried.

After the concrete curing period for the upper mat 51 has elapsed, the reactor containment vessel 53 is assembled on the mat 30 as shown in FIG. 2 as machine-side work. Dry wealth force of the reactor containment vessel 53 -1 to part 55
5 on the mat 30.゛In addition, the pedestal 57 is attached to the base port 1 of the pedestal anchor frame 41.
5, the compression chiton bar 59 of the reactor containment vessel 53 is connected to the anchor frame 4 for seismic support and saddle support via the seismic support and saddle support 61.
They are supported by the mat 30 by No. 3 foundation bolts 45, respectively.

According to the above embodiment, the anchor frames 41, 42 . to which the foundation poles 45 are attached. Since '1.3 is installed and fixed on the lower mat 37 using the embedded metal fittings 35, there is no need to cast plate-wrapped concrete.

Therefore, by omitting one construction work such as plate-wrapped concrete pouring, it is possible to reduce the number of man-hours required for alternating construction work on the construction side and on the machine side.

In addition, pouring work on plate-wrapped concrete 1, which requires a long period of time,
The curing period for M1 volume concrete 1 can be omitted. These things lp I et al. Foundation bolt 45 matt 3
This speeds up the installation and fixing of the N at 0, which shortens the installation period of the mat 30 by about one month, which in turn shortens part 2 of the construction of the nuclear power plant. .

In addition, since there is no T-culm for placing plate-wrapped concrete in the mat construction process of the reactor building, it is possible to improve the work efficiency of the mat construction process and make it safer.

〔Effect of the invention〕

As described above, according to the mat construction method for a reactor building according to the present invention, the foundation bolts are installed and fixed to the lower pine 1 by the fixing members previously buried in the lower pine 1. Safely and easily supporting the base bolts to the lower mat has the effect of shortening the construction period for the pine 1 of the reactor building.

[Brief explanation of drawings]

FIG. 1 shows a mat for a reactor building constructed by carrying out an embodiment of the method for constructing a mat for a reactor building according to the present invention, (A is a partially cutaway plan view, ( B,) is a cross-sectional side view taken along the line B-B in Figure (A), and Figure 2 is a partial view of the state where the reactor containment vessel is installed on the mat constructed by implementing this example. A side view shown in cross-section, Figures 3 and 3 are construction process diagrams showing a comparison between an example of the mating method for the L reactor building and a conventional example, and Figure 4 is the conventional mat construction. The mat of the reactor building constructed by implementing the method is shown, (△) is a cross-sectional view showing -fH1i cut away, (
B) is a cross-sectional side view taken along line B-B in the figure. 30... Pine 1-135... Embedded hardware, 37...
Lower mat, 41... Anchor frame for pedestal, 4
2...Anchor frame for reactor containment vessel skirt, 43
...Earthquake-resistant ribon-1-・Little 1 Novo-1-anchor mount, 45...Foundation port 1., 1j'1...'' Part 2 - Agent 1-0 Applicant Hisashi Hatano 1 Figure 2

Claims (1)

[Claims] 1. When constructing the lower mat, a fixing member is buried, then the foundation bolts are supported by this fixing member, and then an upper mat is constructed and the foundation bolts are buried to construct the mat. A method of constructing mats for a nuclear reactor building, characterized by: 2. The method of constructing a mat for a nuclear reactor building according to claim 1, wherein the foundation bolts are supported by the fixing member via a frame.