JP4779765B2 - Container support structure modification method - Google Patents

Description

  The present invention relates to a method for modifying a support structure of a container installed in a narrow space.

  In general, in the case of a plant such as a nuclear power generation facility, various containers are installed in a narrow space surrounded by a concrete wall.

  Many of these containers have a container body supported by a plurality of (for example, four) support legs erected on a support leg base stand. In order to further improve the seismic performance, it has been proposed to modify the container body to support the container body with a skirt standing on the skirt base.

Examples of the general technical level of a container in which a container body is supported by a plurality of support legs include Patent Document 1 and Patent Document 2.
JP-A-10-273196 JP 2003-148808 A

  By the way, when remodeling a container from support by a support leg to support by a skirt, conventionally, first, the contents stored in the container are first discharged, and piping and equipment installed around the container are temporarily Remove the existing support legs while removing and lifting or moving the container, then attach the skirt to the bottom of the container and install it again in the original position, and then temporarily remove the piping and equipment etc. It is common to perform work to recover.

  However, when containers are installed in a narrow space surrounded by concrete walls, especially in plants such as nuclear power generation facilities, many pipes and equipment placed around and around the ceiling are temporarily removed. In many cases, it is difficult to break the concrete wall, so it has not been possible to modify the support structure of the container using the conventional method.

  In addition, the conventional construction method has a drawback in that a large amount of cost and construction period are required for temporarily removing and restoring a large number of interfering objects such as pipes and equipment, and reinforcing a container for lifting.

  In view of such a situation, the present invention shifts a container from support by a support leg to support by a skirt without temporarily removing and restoring interferences such as a large number of pipes and devices and reinforcing the container for lifting. An object of the present invention is to provide a method for remodeling a container support structure that can be remodeled to reduce costs and shorten the construction period.

The present invention is a container support structure modification method in which the container body is supported by a support leg erected on a support leg base,
A leg skirt base is installed between the existing support leg bases,
The leg skirt block is erected on the leg skirt base, and the upper part of the leg skirt block is fixed to the container body.
After fixing the upper part of the leg skirt upper block to the container body inside the existing support legs, and fixing both ends of the leg skirt upper block to the ends of the adjacent leg skirt blocks,
Remove existing support legs and support leg foundations,
At the place where the supporting leg foundation is removed, an annular skirt foundation is formed by installing the leg skirt foundation so as to be connected to the inter-leg skirt foundation,
A leg skirt lower block is erected on the leg skirt base, and an upper portion of the leg skirt lower block is connected and fixed to a lower portion of the leg skirt upper block, and both ends of the leg skirt lower block are connected to each other. A cylindrical skirt is formed by connecting and fixing to the ends of adjacent skirt blocks between legs,
The present invention relates to a method for modifying a container support structure, wherein the container body is modified so that the container body is supported by a skirt provided upright on the skirt base.

In the container support structure remodeling method, the inter-leg skirt block is fixed to the inter-leg base plate fixed on the inter-leg skirt base, and fixed to stand up on the inter-leg base plate, and the cylinder is fixed thereto. A curved plate-shaped leg-to-leg skirt member divided into a plurality of parts in the circumferential direction, and a reinforcing inner frame member fixed to the inner circumferential surface of the leg-to-leg skirt member to extend in the circumferential direction,
The leg skirt upper block includes a curved plate-like leg skirt upper member on one side obtained by dividing a cylinder into a plurality of portions in the circumferential direction and further divided in the axial direction, and an inner peripheral surface of the leg skirt upper member And a reinforcing inner frame member fixed so as to extend in the circumferential direction,
The leg skirt lower block is fixed to a leg base plate fixed on the leg skirt base, and fixed to stand up on the leg base plate, and the cylinder is divided into a plurality of circumferential directions and further divided in the axial direction. The curved plate-like leg skirt lower member on the other side, and a reinforcing inner frame member fixed to the inner peripheral surface of the leg skirt lower member so as to extend in the circumferential direction can be provided.

  According to the above means, the following operation can be obtained.

  As described above, when a container is modified from support with a support leg to support with a skirt, if the container is installed in a narrow space surrounded by concrete walls, such as in a plant such as a nuclear power generation facility, the periphery and ceiling Even if it is difficult to temporarily remove a lot of pipes and equipment arranged in the section or break the concrete wall, the contents stored in the container are once discharged like the conventional method, There is no need to temporarily remove pipes and equipment installed around the container, and there is no need to lift or move the container.

  According to the container support structure remodeling method of the present invention, the container is supported from the support legs by the skirt without temporarily removing and restoring interferences such as a large number of pipes and equipment and reinforcing the container for lifting. It can be remodeled to support by, and it can have an excellent effect of reducing costs and shortening the construction period.

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

  FIGS. 1-15 is an example of the form which implements this invention, Comprising: The support structure of the container 4 which supported the container main body 3 with the support leg 2 standingly mounted on the support leg base stand 1, such as concrete, is remodeled. Is.

  First, as a first procedure, as shown in FIG. 1, an inter-leg skirt base 5 made by placing concrete or the like is installed between the existing support leg bases 1. In the case of the illustrated example, the container 4 in which the support leg base 1 and the support legs 2 are installed at four locations in the circumferential direction of the bowl-shaped cylindrical container body 3 is taken as an example. The planar shape of the inter-leg skirt base 5 is an arc shape so as to connect between the support leg bases 1 installed at the locations.

  Subsequently, as a second procedure, as shown in FIG. 2, an inter-leg skirt block 6 is erected on the inter-leg skirt base 5 and the upper portion of the inter-leg skirt block 6 is placed on the container body 3. To be fixed by welding. Here, the inter-leg skirt block 6 is fixed on the inter-leg skirt base 5 (see FIG. 2) by anchor bolts and nuts (not shown) as shown in FIGS. Inter-leg base plate 7, curved plate-like inter-leg skirt member 8 which is fixed by welding so as to stand up on the inter-leg base plate 7, and the cylinder is divided into a plurality of circumferential directions thereof, and the inter-leg skirt member An upper reinforcing inner frame member 9 fixed to the upper inner peripheral surface by welding so as to extend in the circumferential direction, and fixed to the lower inner peripheral surface of the inter-leg skirt member 8 so as to extend in the circumferential direction, and both ends thereof A lower reinforcing inner frame member 10 projecting laterally from both ends of the inter-leg skirt member 8 and a leg portion which is fixed to the both ends of the inter-leg skirt member 8 by welding so as to extend vertically. Skirt upper block 12 It has provided comprising constituting a wear plate 11 for connecting fixed by welding fine leg skirt lower block 18. It should be noted that both end portions of the inter-leg base plate 7 project sideways from the both ends of the inter-leg skirt member 8 by a required amount.

  Next, as a third procedure, as shown in FIG. 3, the upper portion of the leg skirt upper block 12 is welded and fixed to the container body 3 inside the existing support leg 2, and the leg skirt upper block 12 is fixed. The both end portions of the rim are welded and fixed to the end portions of the adjacent inter-leg skirt block 6. Here, as shown in FIGS. 10 to 12, the leg skirt upper block 12 has an upper curved plate-like leg portion obtained by dividing a cylinder into a plurality of portions in the circumferential direction and further dividing the cylinder into upper and lower portions (in the axial direction of the cylinder). A skirt upper member 13, an upper reinforcing inner frame member 14 fixed by welding to the inner peripheral surface of the leg skirt upper member 13 in a circumferential direction, and a lower end of the leg skirt upper member 13 in the horizontal direction It has a configuration including a contact plate 15 which is fixed by welding so as to extend, and a leg skirt lower block 18 which will be described later is connected and fixed by welding. The upper part of the leg skirt upper block 12 is fixed to the container body 3 inside the existing support leg 2, and both ends of the leg skirt upper block 12 are connected to the ends of the adjacent leg skirt blocks 6. To the bottom of the container body 3, the cylinder made of the inter-leg skirt member 8 and the leg skirt upper member 13, the upper reinforcing inner frame member 9 and the upper reinforcing inner frame member 14. A reinforcing ring composed of the skirt 19 is formed, and it is possible to ensure the cylindricity of a skirt 19 (see FIG. 6) described later.

  Thereafter, as a fourth procedure, as shown in FIG. 4, the existing support leg 2 and the support leg base 1 are removed.

  Further, as a fifth procedure, as shown in FIG. 5, a leg skirt base 16 formed by placing concrete or the like at the place where the support leg base 1 is removed is connected to the inter-leg skirt base 5. To form an annular skirt base 17.

  Finally, as a sixth procedure, as shown in FIG. 6, a leg skirt lower block 18 is erected on the leg skirt base 16 and the upper part of the leg skirt lower block 18 is placed on the leg skirt. A tubular skirt 19 is formed by welding and fixing to the lower part of the upper block 12 and welding and fixing both ends of the leg skirt lower block 18 to the ends of the adjacent inter-leg skirt blocks 6. The container body 3 is supported by the skirt 19 standing on the skirt base 17 to complete the modification. Here, as shown in FIGS. 10 to 12, the leg skirt lower block 18 is a leg fixed on the leg skirt base 16 (see FIG. 6) by anchor bolts and nuts (not shown). A base plate 20 and a lower curved plate-like leg portion fixed by welding so as to stand up on the leg base plate 20 and divided into a plurality of cylinders in the circumferential direction and further divided into upper and lower portions (axial direction of the cylinder) The skirt lower member 21 and a lower portion that is welded and fixed so as to extend in the circumferential direction to the lower portion of the inner peripheral surface of the leg skirt lower member 21 and to have both ends retracted inward from the both ends of the leg skirt lower member 21 by a required amount. The upper end portion of the leg skirt lower member 21 is connected to the upper portion of the leg skirt of the leg skirt upper block 12 via the abutment plate 15. The lower end portion of the material 13 is welded to be connected and fixed, and both ends of the lower reinforcing inner frame member 22 are connected to and fixed to both end portions of the lower reinforcing inner frame member 10 to form a reinforcing ring. I have to do it. It should be noted that both ends of the leg base plate 20 are retracted inward by a required amount from both ends of the leg skirt lower member 21.

  Further, when a pipe or the like is installed under the container body 3 and the pipe or the like and the inter-leg skirt block 6 interfere with each other, the inter-leg skirt block 6 shown in FIGS. For example, an inter-leg skirt block 6 ′ as shown in FIGS. 13 to 15 may be used. That is, the inter-leg skirt block 6 ′ is formed with a notch 23 at a location corresponding to the pipe or the like, and an inverted U-shaped nozzle sleeve 24 that also serves as a reinforcement is attached to the inner edge of the skirt block 6 ′. A portion of the base plate 7 corresponding to the notch 23 is configured as a divided base plate 7a, and the configuration is the same as that of the inter-leg skirt block 6 except for these points. When installing the inter-leg skirt block 6 ', the nozzle sleeve 24 of the notch 23 is connected to a pipe or the like (not shown) in a state where the divided base plate 7a is not separated from the inter-leg base plate 7 and attached. ), The leg base plate 7 of the leg skirt block 6 'is placed on the leg skirt base 5 (see FIG. 2) and is divided on the leg skirt base 5. After the base plate 7a is installed and the divided base plate 7a is welded and fixed to the inter-leg base plate 7, the inter-leg base plate 7 integrated with the divided base plate 7a is anchor bolts and nuts (not shown). If the upper part of the inter-leg skirt block 6 is welded and fixed to the container body 3, it is possible to dodge the piping etc. It becomes.

  As described above, when the container 4 is modified from the support by the support leg 2 to the support by the skirt 19, when the container 4 is installed in a narrow space surrounded by a concrete wall like a plant such as a nuclear power generation facility, Even if it is difficult to temporarily remove many pipes and equipment placed around the ceiling or the ceiling or break the concrete wall, the contents stored in the container 4 as in the conventional method It is not necessary to temporarily remove the pipes and devices installed around the container 4 and to lift or move the container 4 at all.

  Moreover, the skirt 19 is divided into an inter-leg skirt block 6 and an inter-leg skirt block 6 ', and a leg skirt upper block 12 and a leg skirt lower block 18, and an upper reinforcing inner frame member 9 and a lower reinforcing element, respectively. Since the inner frame member 10, the upper reinforcing inner frame member 14, and the lower reinforcing inner frame member 22 are provided, deformation from carrying in to installation is suppressed, which greatly contributes to improvement in installation accuracy. Further, both ends of the lower reinforcement inner frame member 10 of the inter-leg skirt block 6 and the inter-leg skirt block 6 'are protruded laterally from the both ends of the inter-leg skirt member 8 by a required amount and are adjacent thereto. Both ends of the lower reinforcing inner frame member 22 of the leg skirt lower block 18 are retracted inward by a required amount from both ends of the leg skirt lower member 21, and similarly, the leg skirt block 6 or the leg skirt block 6 is used. The both end portions of the 'inter-leg base plate 7 are protruded laterally from the both ends of the inter-leg skirt member 8 by a required amount, and both the end portions of the leg base plate 20 of the leg skirt lower block 18 are extended below the leg skirt. Since the required amount is retracted inward from both ends of the member 21, the inter-leg skirt block 6 and the inter-leg skirt block 6 ' When the leg skirt upper block 12 and the leg skirt lower block 18 are assembled, the lower reinforcing inner frame member with respect to the joint position between the leg skirt member 8, the leg skirt upper member 13 and the leg skirt lower member 21. 10 and the lower reinforcing inner frame member 22, and the joint position between the leg base plate 7 and the leg base plate 20 are shifted in the circumferential direction of the skirt 19 and are fitted into each other. Workability is also improved.

  In this way, the container 4 can be remodeled from being supported by the support legs 2 to being supported by the skirt 19 without temporarily removing and restoring interfering objects such as a large number of pipes and equipment and reinforcing the container 4 for lifting. Cost reduction and construction period can be shortened.

  Note that the container support structure remodeling method of the present invention is not limited to the illustrated example described above, and various modifications can be made without departing from the scope of the present invention.

It is the side view and top view which show the 1st procedure in an example of embodiment which implements this invention. It is the side view and top view which show the 2nd procedure in an example of embodiment which implements this invention. It is the side view and top view which show the 3rd procedure in an example of embodiment which implements this invention. It is the side view and top view which show the 4th procedure in an example of embodiment which implements this invention. It is the side view and top view which show the 5th procedure in an example of embodiment which implements this invention. It is the side view and top view which show the 6th procedure in an example of embodiment which implements this invention. It is a top view which shows the leg part skirt block in an example of the form which implements this invention. It is a front view which shows the leg part skirt block in an example of embodiment which implements this invention, Comprising: It is a VIII-VIII arrow equivalent view of FIG. FIG. 9 is a side cross-sectional view showing an inter-leg skirt block according to an example of an embodiment of the present invention, and is a cross-sectional view corresponding to the IX-IX cross section of FIG. 8. It is a top view which shows the leg part skirt block which consists of a leg part skirt upper block and leg leg skirt lower block in an example which implements this invention. It is a front view which shows the leg part skirt block which consists of the leg part skirt upper block and leg part skirt lower block in an example which implements this invention, Comprising: It is a XI-XI arrow equivalent view of FIG. FIG. 12 is a side sectional view showing a leg skirt block including a leg skirt upper block and a leg skirt lower block according to an example of an embodiment of the present invention, and is a cross-sectional view corresponding to the XII-XII cross section of FIG. 11. It is a top view which shows the skirt block with a nozzle sleeve in an example of the form which implements this invention. It is a front view which shows the skirt block with a nozzle sleeve in an example of embodiment which implements this invention, Comprising: It is a XIV-XIV arrow equivalent view of FIG. It is a sectional side view which shows the skirt block with a nozzle sleeve in an example of embodiment which implements this invention, Comprising: It is a XV-XV cross-section equivalent figure of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Support leg base stand 2 Support leg 3 Container body 4 Container 5 Leg skirt base stand 6 Leg leg skirt block 7 Leg leg base plate 8 Leg leg skirt member 9 Upper reinforcement inner frame member (reinforcement inner frame member)
10 Lower reinforcement inner frame member (Reinforcement inner frame member)
12 leg skirt upper block 13 leg skirt upper member 14 upper reinforcing inner frame member (reinforcing inner frame member)
16 leg skirt base 17 skirt base 18 leg leg skirt lower block 19 skirt 20 leg base plate 21 leg skirt lower member 22 lower reinforcing inner frame member (reinforcing inner frame member)

Claims (2)

A container support structure remodeling method in which a container body is supported by a support leg erected on a support leg base,
A leg skirt base is installed between the existing support leg bases,
The leg skirt block is erected on the leg skirt base, and the upper part of the leg skirt block is fixed to the container body.
After fixing the upper part of the leg skirt upper block to the container body inside the existing support legs, and fixing both ends of the leg skirt upper block to the ends of the adjacent leg skirt blocks,
Remove existing support legs and support leg foundations,
At the place where the supporting leg foundation is removed, an annular skirt foundation is formed by installing the leg skirt foundation so as to be connected to the inter-leg skirt foundation,
A leg skirt lower block is erected on the leg skirt base, and an upper portion of the leg skirt lower block is connected and fixed to a lower portion of the leg skirt upper block, and both ends of the leg skirt lower block are connected to each other. A cylindrical skirt is formed by connecting and fixing to the ends of adjacent skirt blocks between legs,
A method for modifying a container support structure, wherein the container body is modified to support the container body by a skirt standing on the skirt base. The inter-leg skirt block has an inter-leg base plate fixed on the inter-leg skirt base, and a curved plate-like shape that is fixed to rise on the inter-leg base plate and divides the cylinder into a plurality of circumferential directions. An inter-leg skirt member, and a reinforcing inner frame member fixed to the inner peripheral surface of the inter-leg skirt member so as to extend in the circumferential direction,
The leg skirt upper block includes a curved plate-like leg skirt upper member on one side obtained by dividing a cylinder into a plurality of portions in the circumferential direction and further divided in the axial direction, and an inner peripheral surface of the leg skirt upper member And a reinforcing inner frame member fixed so as to extend in the circumferential direction,
The leg skirt lower block is fixed to a leg base plate fixed on the leg skirt base, and fixed to stand up on the leg base plate, and the cylinder is divided into a plurality of circumferential directions and further divided in the axial direction. The container according to claim 1, further comprising: a curved plate-like leg skirt lower member on the other side; and a reinforcing inner frame member fixed to the inner circumferential surface of the leg skirt lower member so as to extend in the circumferential direction. Support structure modification method.

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