JPH0750189B2 - Installation method for the penetration of the containment vessel piping - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for installing a penetration portion of a reinforced concrete reactor containment vessel, and particularly to a reinforcing material and a reinforcement of a reinforced concrete for temporarily supporting a penetration portion of a pipe which is attached around the penetration portion of the pipe. Concerning the construction method to avoid interference with.

[0002]

2. Description of the Related Art A reinforced concrete containment vessel is composed of reinforced concrete that bears a load such as the pressure inside the containment vessel and a steel sheet liner stretched over the inner wall of the containment vessel. The reactor containment vessel is provided with a large number of pipe penetrating portions for penetrating various pipes. Since this pipe penetration portion serves as an anchor in the reinforced concrete portion of the reactor containment vessel, it is connected to an inner flange plate and an outer flange plate made of a thick plate integrated with the liner so as to withstand its own weight and the load of the pipe.

Conventionally, the installation of the pipe penetration part is carried out by using a temporary fixing wire to temporarily fix the pipe penetration part connected to the inner flange plate integrated with the liner to the liner anchor, and the temporarily fixed pipe penetration part. It is carried out through a second step of arranging reinforcing bars around the portion and a third step of placing concrete to fix the pipe penetration portion. Figure 1
6 shows the implementation status of the second step. The pipe penetrating portion 5 is welded to the inner flange plate 6 integrated with the liner, and is supported by connecting the temporary fixing metal fitting 12 attached to the liner anchor 3 with the temporary fixing wire 11 and the outer flange plate 7. Reinforcing bars 10 are arranged around the pipe penetration portion 5.

After the installation of the pipe penetration 5 of the reinforced concrete reactor containment vessel, the weight of the pipe penetration 5 and the load received from the pipe are applied to the reinforced concrete 9. Therefore, before the completion of reinforced concrete reinforcement and concrete driving, the pipe penetrating portion is supported by the liner 2, so the center of gravity is biased to the outside of the liner 2, and the temporary fixing wire 11
It is conceivable that the liner 2 and the liner anchor 3 will be deformed due to a bending moment unless the temporary fixing metal fitting 12 attached to the liner anchor 3 and the outer flange plate 7 are connected to each other to support the pipe penetration portion 5. Therefore, the temporary fixing wire 11 is an indispensable member for preventing deformation.

[0005]

As described above, the temporary fixing wire 11 plays an important role in the installation process of the pipe penetrating portion 5, but when the pipe penetrating portion 5 is supported, the reinforcing bars 10 are arranged and arranged. Temporary fastening wire 11 for muscle work
And the reinforcing bar 10 interfere with each other. That is, in the conventional installation method of the pipe penetration part of the reinforced concrete reactor containment vessel, at the time of arranging and arranging the reinforcing bar of the reinforced concrete, a reinforcement material for temporarily fixing the liner anchor and the outer flange plate to fix the pipe penetration part. However, there is a problem in that it interferes with the reinforcing bars that have penetrated to the vicinity of the pipe penetration, making it difficult to arrange and arrange the reinforcing bars, extending the installation period and increasing the construction cost.

An object of the present invention is to minimize interference caused by a temporary fixing wire, which is a reinforcing material connecting the outer flange plate of the pipe penetrating portion and the liner anchor, and the reinforcing bar of the reinforced concrete frame, and facilitate the arranging work. It is to provide a method of installing a penetrating portion of a containment vessel that can proceed.

[0007]

In order to achieve the above object, the present invention employs the following means. That is, the first step of temporarily fixing the pipe penetration part connected to the inner flange plate integrated with the liner to the liner anchor by using the temporarily fixing wire, and the first step of arranging the reinforcing bar around the temporarily fixed pipe penetration part. In the installation method of the reactor containment vessel piping penetration, which comprises two steps and a third step of placing concrete to fix the piping penetration, at the time of the second step, from the inner flange plate of the piping penetration After attaching the balancer to the part protruding into the storage container, at least a part of the temporary fixing wire is removed. In the first step, the liner anchor is extendedly connected to the inner flange plate to increase the rigidity of the inner flange plate and reduce the number of temporary fixing wires as a reinforcing material. The balancer attached to the penetration part should be provided with a hollow part, and the hollow part should be filled with water or sand to fine-tune the balancer weight according to the type of pipe penetration part. You can also

[0008]

[Operation] When arranging the reinforced concrete structure, a balancer of a predetermined weight is attached to the pipe penetration part, and the weight balance between the pipe penetration part inside and outside the liner, which is a thin steel plate, is adjusted to adjust the liner anchor and the pipe penetration part. It is possible to reduce the dependency of the force on the reinforcing material such as the temporary fixing wire that connects the outer flange plate, and it is possible to remove all or some of the temporary fixing wires. Further, by extending and connecting the liner anchor to the inner flange plate, the rigidity of the inner flange plate can be increased and the number of temporary fixing wires to be used can be reduced. Furthermore, by providing a hollow portion in the balancer and filling the hollow portion with water or sand,
Fine adjustment of the weight can be easily performed according to the type of pipe penetration.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A reinforced concrete reactor containment vessel pipe penetration installation method according to an embodiment of the present invention will be described below with reference to the drawings.

First, the overall construction of a reinforced concrete storage container will be described with reference to FIG. In FIG. 2, the reinforced concrete containment container is configured to apply a load such as internal pressure to the reinforced concrete 9
The liner 2 that is supported by and is stretched on the inner wall of the liner has a function of only maintaining airtightness. The pipe penetrating portion 5 is installed for various pipes that penetrate the inside and outside of the reactor containment vessel, and serves as an anchor at the reinforced concrete 9 portion of the reactor containment vessel, so that the inside of the thick plate can withstand its own weight and the load of the pipe. A flange plate 6 and an outer flange plate 7 are installed. Further, FIG. 3 is an enlarged view of a cross section of the wall of the reactor containment vessel, which is composed of steel parts of the liner 2 and the liner anchor 3, and concrete parts of the reinforced concrete 9 and the reinforcing bar 10. The liner anchor 3 is made of T-shaped steel, reinforces the liner 2, and the reinforcing bars 10 are arranged vertically and horizontally.

The installation method for the penetration of the reinforced concrete reactor containment vessel piping can be roughly divided into three steps, which are shown in FIGS. FIG. 4 shows the loading and installation state of the steel portion in the first step. Pipe penetration part 5
Is attached to a large block consisting of a liner 2 and a liner anchor 3 via an inner flange plate 6. Further, a temporary fixing wire 11 is connected to the outer flange plate 7 and the liner anchor 3 via a temporary fixing metal fitting 12,
It supports the pipe penetration 5.

The large block shown in FIG. 4 has, for example, a ring shape, and these blocks are sequentially stacked from bottom to top. When one ring-shaped large block is formed, the process proceeds to the second step as shown in FIG.

FIG. 1 shows a situation in which the reinforcing bars 10 of reinforced concrete are arranged and arranged. The wire 11 for temporary fixing which is the reinforcing material of the pipe penetration portion 5 and the like which is present in FIG. 4 is removed with all or a part left, and instead, the balancer 13 is attached to the inside of the inner flange plate 6 of the pipe penetration portion 5. Has been.

Next, the third step is to pour concrete. FIG. 5 shows the situation immediately before the concrete is poured. Reinforcing bars are placed near the pipe penetration 5,
A concrete formwork 15 is installed in the periphery. After driving the concrete, the balancer 13 and the concrete formwork 15 are removed.

According to the present embodiment, the temporary fixing wire 11
Can be removed with all or a few left,
The problem of interference between the reinforcing bar 10 of the reinforced concrete and the reinforcement member 11 for temporarily fixing the pipe penetration part, which is a problem at the time of installing the penetration part of the reinforced concrete reactor containment vessel, is improved, and the reinforcing work time is shortened.

Further, as shown in FIG. 6, the liner anchor 3 may be extendedly connected to the inner flange plate 6 to form a large block with a structure in which the rigidity of the inner flange plate 6 is increased. In this case, when installing the small-and-medium-diameter pipe penetration part, the rigidity is increased,
Reinforcement materials such as temporary fixing wires, balancers, etc. are not particularly required in each step of installation, placement of reinforcing bars and reinforcing bars,
Sometimes each work can be done efficiently. However, in the case of a large-diameter heavy pipe penetrating portion, the rigidity is insufficient even with the structure shown in FIG. Therefore, the mounting of the balancer according to the present invention is effective. FIGS. 7, 8 and 9 show pipe penetration part installation states in three steps of the reinforced concrete storage container pipe penetration part installation method when the structure shown in FIG. 6 is used. The contents of the installation method of this embodiment are the same as those in FIGS. 4, 1 and 5, except that the structure shown in FIG. 6 is used.

According to this embodiment, in addition to the effects of the above-described embodiment, the number of temporary fixing wires 11 to be used can be reduced, so that the amount of work for attaching the temporary fixing wires 11 is reduced. .

The balancer 1 used in the second step of the installation process of the penetrating portion of the reinforced concrete reactor containment vessel
As shown in FIG. 1, 3 is fixed to the inner end of the pipe penetrating portion 5 by a balancer mounting metal fitting 14.
It is attached to the rod 8A extending from the closing plate 8 that closes the outer end of the pipe penetration portion 5 by screwing or the like. This balancer 13 is attached until the work of arranging the reinforcing bars of the reinforced concrete frame and the driving of the concrete are completed,
After that, it is removed by removing the metal fitting 14.
The closing plate 8 is originally used for a pressure resistance test of the reactor containment vessel, which is performed thereafter, and is removed after the test.

As another example of the mounting mechanism of the balancer 13, as shown in FIG. 10, an elastic member 16 such as rubber or synthetic resin is inserted and fixed inside the pipe penetrating portion 5, whereby the balancer is fixed. There is also a method in which the balancer 13 can be easily attached and detached without supporting the pipe penetrating portion 5 by supporting the tip of the mounting member 14A. A cross-sectional view of this mechanism is shown in FIG. A wedge-shaped member 14a is provided at the tip of the metal fitting 14A, and a screw 14b is cut at the tip thereof. When the screw 14b is screwed into the nut 17, the rubber or synthetic resin member 16 is compressed by the action of the wedge-shaped member 14a and its diameter is expanded and fixed.

Further, by using the balancer mounting metal fitting 14B which is fixed by tightening from the outside of the pipe penetrating portion 5 by screwing as shown in FIG. 12, the balancer 13B is processed on the pipe penetrating portion 5. There is also a method that can be easily attached and detached without using.

Also, as shown in FIG. 13, a balancer mounting bracket 14 in the shape of a bocce is provided at about four locations on the outer circumference of the pipe penetration portion.
There is also a method of welding C, cutting a groove 18 as shown in FIG. 14 on the balancer 13C side, inserting a metal fitting 14C into the groove 18, and then fixing the balancer 13C by an interlock mechanism for rotating the balancer 13C.

With respect to the structure shown in FIG. 13, the balancer 13D is provided with a hollow portion as shown in FIG.
It is conceivable to remove it and fill it with water or sand as a weight to adjust the weight. According to this method, fine adjustment of the balancer weight can be easily performed according to the type of the pipe penetrating portion.

According to this embodiment, the weight can be finely adjusted according to the type of the pipe penetrating portion 5, so that the work of mounting the balancer can be facilitated. Although FIG. 15 is an application example of the balancer shown in FIG. 13, the same configuration can be applied to that of FIG.

[0024]

According to the present invention, it is possible to remove all or some of the temporary fixing wires, so that
The problem of interference between the reinforcing bar of reinforced concrete and the reinforcement for temporary fixing of the pipe penetration part, which is a problem at the time of installing the penetration part of the reinforced concrete reactor containment vessel, is improved, and the work time for the bar arrangement is shortened. Moreover, since the number of temporary fixing wires to be used can be reduced, the amount of work for attaching the temporary fixing wires is also reduced. Further, since the weight can be finely adjusted according to the type of the pipe penetrating portion, the balancer mounting work becomes easy. As a result, the construction period can be shortened and the construction cost can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a portion B in FIG. 2 relating to a method of installing a penetration portion of a reinforced concrete reactor containment vessel pipe according to an embodiment of the present invention, showing a state of reinforced concrete arrangement before placing concrete.

FIG. 2 is a vertical sectional view of a reinforced concrete reactor containment vessel.

3 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 4 is a view of the pipe penetrating portion shown in FIG. 1 before the reinforcement is arranged, as viewed from the outer flange plate side.

FIG. 5 is a diagram showing an installation situation immediately before driving concrete into the pipe penetration portion shown in FIG. 1;

FIG. 6 is a view of a pipe penetrating portion formed by a structure in which a liner anchor is extendedly connected to an inner flange plate to enhance rigidity.
It is a figure similar to.

FIG. 7 is a cross-sectional view of a loading / installing state of a pipe penetrating portion according to another embodiment of the present invention, which employs the structure shown in FIG.

FIG. 8 is a diagram showing a situation when a reinforcing bar is arranged in the pipe penetration portion shown in FIG. 7.

FIG. 9 is a diagram showing a situation immediately before placing concrete in the pipe penetration portion shown in FIG.

FIG. 10 is a cross-sectional view showing another embodiment of the balancer mounting mechanism.

11 is an enlarged cross-sectional view of the balancer mounting mechanism shown in FIG.

FIG. 12 is a view showing still another embodiment of the balancer mounting mechanism.

FIG. 13 is a view showing still another embodiment of the balancer mounting mechanism.

FIG. 14 is an enlarged view of the interlock type balancer shown in FIG. 13 as seen from the CC direction.

FIG. 15 is a sectional view showing another embodiment of the balancer used in the present invention.

FIG. 16 is an enlarged view of a conventional concrete reactor containment vessel pipe penetrating portion, showing a situation when reinforcing bars are arranged.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reinforced concrete reactor containment vessel 2 Liner 3 Liner anchor 5 Pipe penetration part 6 Inner flange plate 7 Outer flange plate 9 Reinforced concrete 10 Rebar 11 Temporary fixing wire 13, 13A, 13B, 13C, 13D balancer 14, 14A, 14B, 14C balancer Mounting bracket 19 Hollow part provided on the balancer

Claims (3)

[Claims] 1. A first step of temporarily fixing a pipe through part connected to an inner flange plate integrated with a liner to a liner anchor by using a temporary fixing wire, and a reinforcing bar is arranged around the temporarily fixed pipe through part. In the installation method of the reactor containment vessel piping penetration, which comprises a second step of streaking and a third step of placing concrete to fix the piping penetration, at the time of the second step, inside the piping penetration A method for installing a penetrating portion of a reactor containment vessel, comprising attaching a balancer to a portion projecting from the flange plate into the containment vessel, and then removing at least a part of the temporary fixing wire. 2. In the first step, a liner anchor is extendedly connected to the inner flange plate to increase the rigidity of the inner flange plate and reduce the number of temporary fixing wires as a reinforcing material. Installation method for the penetration of the containment pipe of the reactor. 3. In the second step, the balancer attached to the pipe penetrating portion is provided with a hollow portion, and the hollow portion is filled with water, sand, or the like, so that the weight of the balancer depending on the type of the pipe penetrating portion. The method for installing a penetrating portion of a reactor containment vessel according to claim 1, characterized in that the fine adjustment is performed.