JPH0566284A - Installation construction method and installation frame of cylinder liner leg part of concrete-made reactor containment vessel - Google Patents

Abstract

PURPOSE:To improve the installation workability of a ring girder of a cylindrical liner leg part and make better the workability of work of placing of reinforcements around a frame in regard to the installation construction method of the cylindrical liner leg part of a concrete-made reactor containment vessel. CONSTITUTION:Support frames 7 composed of steel material having parts positioned at the inside of a cylindrical liner 2 and at the outside of vertical reinforcements 6 of a containment vessel cylindrical part 1 so that they may not interfere with upper end reinforcements 5 of the bottom part 3 of a concrete- made reactor containment vessel are erected, and the installation frame of a bridge structure is set by connecting upper end members 9 of the support frames 7 in the radial direction. Furthermore the support frames 7 are also used as temporarily set support frames of vertical reinforcements 6 of the containment vessel cylindrical part 1. The joints of the support frames 7 and the upper end members 9 are jointed by means of bolts 14 whose boltholes 12 are made slots for the purpose of the adjustment of an installation level of a ring girder 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the construction of a concrete reactor containment vessel, and more particularly to an installation method for supporting a cylindrical liner leg on the bottom of the reactor containment vessel when installing a cylindrical liner of the concrete reactor containment vessel. And the installation stand.

[0002]

2. Description of the Related Art To install a conventional cylindrical liner for a concrete reactor containment vessel, as shown in FIG. 6, first, after assembling a bottom rebar 4 at a portion which will be the bottom portion 3 of the concrete reactor containment vessel, Installation pedestal 21 to which two inner and outer rows of anchor bolts 20 for supporting the ring girder 15 of the leg portion of the cylindrical liner 2 and the cylindrical portion 1 of the reactor containment vessel are attached.
The support frame 22 for the vertical reinforcing bars 6 is set. After that, concrete 11 is poured to an intermediate position of the bottom 3 of the storage container, and these pedestals 21 and 22 are fixed. The installation base 21 to which the anchor bolt 20 is attached has a cylindrical frame structure which is assembled along the cylindrical liner 2 below the legs of the cylindrical liner 2.

Next, the upper rebar 5 of the bottom 3 of the storage container is set, and the ring girder 15 is attached to the upper ends of the anchor bolts 20 in two rows, the inner and outer rows, and the ring girder 1 is adjusted while adjusting the level.
Tighten 5 to the anchor bolt 20 and fix. After this,
Set the leg of the cylindrical liner 2 on the ring girder 15,
Weld.

[0004]

In the prior art described above, when the ring girders 15 are attached to the anchor bolts 20 when the anchor bolts 20 in the outer row are tightened, the cylindrical portion 1 of the reactor containment vessel is close to that position. Since the vertical reinforcing bars 6 of the vertical reinforcing bars 6 are provided, the tightening work is extremely difficult. In addition, the supporting frame 22 for the vertical reinforcing bars 6 and the mounting frame 21 for anchor bolts
Since they are close to each other, there is a problem that the workability of the rebar assembly work is poor.

An object of the present invention is to improve the installation workability of a ring girder of a cylindrical liner leg portion, and also to improve the workability of a rebar assembly work around a gantry, to install a cylindrical liner leg portion of a concrete reactor containment vessel. It is to provide a construction method and a mounting base.

[0006]

In order to achieve the above object, the present invention provides a cylindrical liner for installing a leg portion of a cylindrical liner of a concrete reactor containment vessel so as not to interfere with the upper end reinforcing bar at the bottom of the containment vessel. A supporting frame having portions respectively located inside and inside the storage container cylindrical portion in the longitudinal direction of the reinforcing bar, and an upper frame of the supporting frame is connected in a radial direction to set an installation frame having a bridge structure. The ring girder of the cylindrical liner leg is placed on the upper end member of the.

Preferably, the upper end member of the support frame is coupled with a bolt, and the bolt hole of the bolt coupling portion is an elongated hole elongated in the height direction, and the installation level of the ring girder is adjusted by the elongated hole.

Further, preferably, the installation mount is also used as a temporary support mount for the longitudinal reinforcing bars of the cylindrical portion of the storage container.

Further, according to the present invention, in the installation stand for the leg portion of the cylindrical liner of the concrete reactor containment vessel, a plurality of longitudinal members which are erected inside the cylindrical liner and outside the longitudinal reinforcing bars of the cylindrical portion of the containment vessel are provided. A plurality of lateral members connecting these longitudinal members together to form a supporting frame, and a plurality of upper end members connecting the upper ends of the longitudinal members in a radial direction are provided as a part of the plurality of lateral members. The ring girder of the cylindrical liner leg is placed on the upper end member of the above.

Preferably, the vertical member and the upper end member are connected by a bolt, and at least one of the bolt hole of the vertical member and the bolt hole of the upper end member of the bolt connecting portion is an elongated hole elongated in the height direction. The long hole enables the installation level of the ring girder to be adjusted.

[0011]

The supporting frame having the portions located inside the cylindrical liner and outside the longitudinal reinforcing bars of the containment vessel is erected, and the upper end member of the supporting frame is connected in the radial direction to lower the cylindrical liner leg. Since the installation frame having a bridge structure that crosses over is set, it is possible to mount the ring girder of the cylindrical liner leg on the upper end member and support the ring girder. Also, by making the bolt holes at the joint between the support frame and the upper end member long and slender in the height direction, it is possible to adjust the installation level of the ring girder, and the anchor bolts that have been used conventionally are no longer necessary. The work of tightening the anchor bolts is unnecessary, and the work of installing the ring girder on the leg of the cylindrical liner becomes easy. Further, since the support frame is located below the vertical rebar of the cylindrical portion of the storage container, the installation base can also be used as a temporary support base for the vertical rebar, and the number of temporary materials can be reduced.
Further, by eliminating the support frame for the vertical reinforcing bars, the workability of assembling the reinforcing bar around the frame is improved, the construction period is shortened, and the construction cost can be reduced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3, reference numeral 1 is a cylindrical portion of a concrete reactor containment vessel, and the cylindrical portion 1 is constructed by placing a steel plate cylindrical liner 2 on the inner peripheral side thereof and then placing concrete. It The present embodiment relates to a method of installing the legs of the cylindrical liner 2, and the procedure is as follows.

First, as shown in FIG. 1, a lower end reinforcing bar 4 of the bottom portion 3 is assembled to a portion which will be the bottom portion 3 of the concrete reactor containment vessel. Then the bottom part 3 to be assembled after this
In order not to interfere with the upper end reinforcing bar 5 of the above, the support frame 7 having the portions located inside the cylindrical liner 2 and outside the longitudinal reinforcing bar 6 of the cylindrical portion 1 of the storage container is set up, and the installation frame is set. Here, the support frame 7 is constructed by assembling steel materials, and as shown in FIG. 4, a plurality of vertical members 10 and a lateral member 8 and a diagonal member 8a connecting the vertical members 10 to each other.
And have. The longitudinal members 10 are located inside the cylindrical liner 2 and outside the longitudinal reinforcing bars 6 of the storage container cylindrical portion 1, respectively. Further, as a part of the transverse member 8, there is an upper end member 9 which connects the upper ends of the longitudinal members 10 in a radial direction as shown in FIG. 2, and the transverse member 8 forms a bridge structure for the legs of the cylindrical liner 2. providing. At this point,
Since the upper end member 9 interferes with the setting of the upper end rebar 5 of the reactor containment vessel bottom portion 3, it is removed. Then, in this state, the vertical rebar 6 of the cylindrical portion 1 of the reactor containment vessel is set. The setting of the vertical reinforcing bars 6 is carried out by holding the supporting frame 7 in the support frame 7. That is, the support frame 7 also serves as a support frame for the vertical reinforcing bars 6.

In FIG. 4, the horizontal members and the diagonal members on two of the four surfaces of the vertical member 10 are not shown. Further, the support frame 7 includes four longitudinal members 1
Although only the portion consisting of 0s is shown, in actuality, this is taken as one unit and is arranged continuously in a cylindrical shape along the legs of the cylindrical frame. At this time, if a suitable number of parts, for example, the parts made up of the four vertical members 10 shown in the figure are assembled in advance as a unit and installed on site, the installation time can be shortened. The diagonal member 8a may be omitted if it has sufficient strength.

After setting the supporting frame 7 and the longitudinal reinforcing bars 6, concrete 11 is poured up to an intermediate position of the bottom 3 of the reactor containment vessel to fix the supporting frame 7 and the longitudinal reinforcing bars 6 as shown in FIG. .. Next, after setting the upper end reinforcing bars 5 of the reactor containment vessel bottom 3 so as not to interfere with the support frame 7, the upper ends of the longitudinal members 10 of the support frame 7 are connected in the radial direction by the upper end members 9. This connection is made with bolts. Therefore, as shown in FIG. 5, the bolt holes 1 are formed in the upper end of the longitudinal member 10 of the support frame 7 and the upper end member 9, respectively.
Leave 2 and 13 open and tighten the bolt 14. At this time, at least one of the bolt holes 12 and 13, for example, the bolt hole 12 of the longitudinal member 10 of the support frame is an elongated hole elongated in the height direction, and the ring girder 1 of the leg portion of the cylindrical liner 2 is formed.
After adjusting the installation level of 5 (see FIG. 3), tighten the bolt 14. After tightening the bolt 14, if necessary, it is fixed by welding or the like.

After fixing the upper end member 9 of the support frame 7 as described above, the ring girder 15 is placed on the upper end member 9 as shown in FIG. 3 and fixed by welding. Then, the leg portion of the cylindrical liner 2 is welded and fixed on the ring girder 15. The ring girder 15 may be placed on the upper end member 9 while being welded to the legs of the cylindrical liner 2. With the above, the installation of the legs of the cylindrical liner 2 is completed.

According to this embodiment, since the leg portion of the cylindrical liner 2 can be installed without using the conventional anchor bolt, the work of tightening the anchor bolt is eliminated and the work of installing the ring girder of the leg portion of the cylindrical liner is facilitated. Become. In addition, since the support frame 7 can also be used as a temporary support stand for the longitudinal reinforcing bars 6 of the reactor containment cylinder 1, it is possible to reduce the number of temporary materials and improve the workability of the reinforcing bar assembly work around the stand. The construction period can be shortened and the construction cost can be reduced.

[0018]

According to the present invention, since the ring girder of the cylindrical liner leg is supported by the installation frame having the bridge structure, the workability of installing the ring girder of the cylindrical liner leg is improved. Also, since the installation base is also used as a temporary support base for the vertical reinforcing bars of the reactor containment cylinder, the amount of temporary materials is reduced and the support base for the reinforcing bars is eliminated, so the workability of the rebar assembly work around the base is reduced. It will be improved, the construction period will be shortened, and the construction cost will be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing a first procedure of an installation method of a cylindrical liner leg portion of a concrete reactor containment vessel according to an embodiment of the present invention.

FIG. 2 is a diagram showing a next procedure of the installation method.

FIG. 3 is a diagram showing a final procedure of the installation method.

FIG. 4 is a perspective view of an installation stand used in the installation method.

5 is an enlarged exploded view of a portion V of FIG. 4 which is a bolt connecting portion.

FIG. 6 is a diagram showing a conventional installation method.

[Explanation of symbols]

 1 Reactor Containment Cylinder 2 Cylindrical Liner 3 Reactor Containment Vessel Bottom 4 Bottom Reinforcing Bar 5 Top Reinforcing Bar 6 Longitudinal Reinforcing Bar 7 Support Frame (Installation Stand) 8 Horizontal Member 9 Upper End Member (Horizontal Member) 10 Longitudinal Member 12 Bolt hole 15 Ring girder

Claims (5)

[Claims] 1. A method of installing a leg portion of a cylindrical liner of a concrete reactor containment vessel, the inside of the cylindrical liner and the outside of the longitudinal reinforcing rod of the containment vessel cylindrical portion so as not to interfere with the upper end reinforcing bar at the bottom of the containment vessel. Set up a support frame having respective parts, and set up a bridge mounting structure by connecting the upper end members of the support frame in the radial direction, and place the ring girder of the cylindrical liner leg on the upper end member of the support frame. Installation method characterized by that. 2. The method of installing a cylindrical liner leg portion of a concrete reactor containment vessel according to claim 1, wherein the upper end member of the support frame is connected by a bolt, and the bolt hole of the bolt connection portion is heightened. An installation method characterized in that the installation level of the ring girder is adjusted by the elongated hole elongated in the direction. 3. The method of installing a leg portion of a cylindrical liner of a concrete reactor containment vessel according to claim 1, wherein the installation stand is also used as a temporary support stand for a longitudinal reinforcing bar of the containment cylinder section. Installation method to do. 4. A plurality of longitudinal members which are erected on the inside of the cylindrical liner and on the outside of the longitudinal reinforcing bars of the containment cylinder in the installation stand of the cylindrical liner leg of the concrete reactor containment vessel, and these longitudinal directions. A supporting frame is configured with a plurality of lateral members connecting the members, and a plurality of upper end members that connect the upper ends of the vertical members in the radial direction are provided as a part of the plurality of lateral members. An installation stand characterized by mounting a ring girder of a cylindrical liner leg on the top. 5. In the installation stand for the cylindrical liner leg portion of the concrete reactor containment vessel according to claim 4, the vertical member and the upper end member are connected by a bolt, and the vertical member of the bolt connecting portion is connected. At least one of the bolt hole and the bolt hole of the upper end member is an elongated hole elongated in the height direction, and the installation level of the ring girder can be adjusted by the elongated hole.