JP6910235B2 - Container reinforcement method and container support structure - Google Patents

Description

The present invention relates to a method for reinforcing a container for reinforcing a support portion of a container for storing a fluid inside, and a support structure for the container.

Since the tank used as a container for storing the fluid inside has a spherical shape in which hemispheres are provided above and below the cylindrical portion, it is necessary to install the tank at a predetermined position using a support portion. This support portion is generally composed of a plurality of legs, and the plurality of legs are fixed to the lower part of the tank and installed at a predetermined position.

However, the seismic strength is not sufficient in the tank support structure using a plurality of legs. For example, when an earthquake occurs, the tank may tip over and the fluid stored inside may leak. Therefore, it is necessary to reinforce a plurality of legs constituting the support portion of the tank. As a support structure for such a container, for example, there is one described in the following patent documents.

Japanese Unexamined Patent Publication No. 09-142570

In a structure in which the tank is installed at a predetermined position by a plurality of legs, it is conceivable to increase the number of legs when reinforcing the support portion of the tank. However, in such a reinforcement method, the support portion of the tank becomes complicated, the support positions for supporting the tank increase, local stress is generated at many positions of the tank, and the strength of the tank itself decreases. There is a risk that it will end up.

The present invention solves the above-mentioned problems, and an object of the present invention is to provide a method for reinforcing a container and a support structure for the container while improving the support rigidity of the container and suppressing an increase in costs incurred.

The method for reinforcing the container of the present invention for achieving the above object is the step of removing the lower end portion of the support leg and the step of reinforcing the support leg in the method for reinforcing the container for reinforcing the plurality of support legs that support the container. A step of installing a new foundation member on the ground below, a step of fixing the reinforcing member to the support leg to reinforce it into a box-shaped cross section, and a step of connecting the lower end portion of the reinforcing member to the foundation member. It is characterized by having.

Therefore, by fixing the reinforcing member to the support leg that supports the container and reinforcing it in a box-shaped cross-sectional shape, it is possible to improve the support rigidity of the container. Further, since the support rigidity of the container can be improved without replacing the container, it is not necessary to transfer the internal fluid, and the increase in the cost generated can be suppressed.

In the method for reinforcing a container of the present invention, the reinforcing member is installed so as to be fixed to the support leg to form a box-shaped cross-sectional shape and to be provided at the lower end of the reinforcing portion and connected to the foundation member. It is characterized by having a part.

Therefore, by forming the reinforcing member from the reinforcing portion forming the box-shaped cross-sectional shape and the installation portion provided at the lower end portion of the reinforcing portion, the reinforcing member can be easily fixed to the support leg and can be used as the foundation member. It can be connected and workability can be improved.

In the method for reinforcing a container of the present invention, the support leg has a leg main body portion whose upper end is fixed to the container and an installation portion provided below the end of the script and supported by an existing foundation. However, it is characterized in that the installation portion of the support leg is removed.

Therefore, when removing the lower end portion of the support leg, in order to remove the installation portion of the support leg, a new installation portion may be provided on the reinforcing member side, and the lower end portion of the reinforcing member can be easily connected to the foundation member. And workability can be improved.

In the method for reinforcing a container of the present invention, the reinforcing member is characterized by having a ceiling portion that closes an upper end portion of the reinforcing portion.

Therefore, by providing a ceiling portion that closes the upper end portion of the reinforcing portion, it is possible to prevent water from entering the inside of the box-shaped cross-sectional shape formed by the support legs and the reinforcing member, and the durability can be improved. can.

The method for reinforcing a container of the present invention is characterized in that after the foundation member is installed on the ground, the height of the mounting surface of the foundation member with respect to the container is adjusted.

Therefore, by adjusting the height of the foundation member installed on the ground with reference to the position of the container, the support legs can be reinforced without changing the position of the container, and workability can be improved.

In the method for reinforcing a container of the present invention, after fixing the reinforcing member to the support leg, the height of the mounting surface of the foundation member with respect to the height of the mounting surface at the lower end of the reinforcing member is readjusted. It is a feature.

Therefore, by readjusting the height of the foundation member after fixing the reinforcing member to the support leg, the support rigidity of the container can be appropriately improved without applying a load to the support leg and the reinforcing member.

In the method for reinforcing a container of the present invention, the reinforcing member has a U-shaped cross-sectional shape, a groove portion is formed at each end of the U-shaped cross-sectional shape, and the groove portion is brought into contact with the support leg to open. It is characterized in that the reinforcing member is fixed to the support leg by performing pre-welding.

Therefore, by fixing the support leg and the reinforcing member by groove welding, it is possible to secure high rigidity of the box-shaped cross-sectional shape of the support leg and the reinforcing member formed after the fixing.

In the method for reinforcing a container of the present invention, the support legs have a U-shaped cross-sectional shape, and each end of the U-shaped cross-sectional shape is processed to form a connecting portion, and the groove portion is brought into contact with the connecting portion. The reinforcing member is fixed to the support leg by performing groove welding.

Therefore, each end of the support leg is processed in advance to form a connecting portion, and the groove portion of the reinforcing member is brought into contact with the connecting portion to perform groove welding, whereby the supporting leg and the reinforcing member are formed. It is possible to properly connect the support legs and the reinforcing member, and it is possible to secure high rigidity of the box-shaped cross-sectional shape of the support legs and the reinforcing members.

Further, the container support structure of the present invention is characterized in that it has been modified by the method for reinforcing the container.

Therefore, by fixing the reinforcing member to the support leg that supports the container and reinforcing it in a box-shaped cross-sectional shape, it is possible to improve the support rigidity of the container.

According to the method for reinforcing the container and the support structure of the container of the present invention, it is possible to improve the support rigidity of the container and suppress the increase in the cost incurred.

FIG. 1 is a front view showing a support structure of a container reinforced by the method of reinforcing the container of the present embodiment. FIG. 2 is a plan view showing a support structure of a container reinforced by the method of reinforcing the container of the present embodiment. FIG. 3 is a front view showing a support structure of a container to be reinforced by the method of reinforcing the container of the present embodiment. FIG. 4 is a plan view showing a support structure of a container to be reinforced by the method of reinforcing the container of the present embodiment. FIG. 5 is a flowchart showing a method of reinforcing the container of the present embodiment. FIG. 6 is a front schematic view for explaining a method of reinforcing the container. FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG. FIG. 8 is a front schematic view for explaining a method of reinforcing the container. FIG. 9 is a cross-sectional view taken along the line IX-IX of FIG. FIG. 10 is a schematic front view for explaining a method of reinforcing the container. FIG. 11 is a front schematic view for explaining a method of reinforcing the container. FIG. 12 is a cross-sectional view taken along the line XII-XII of FIG. FIG. 13 is a front schematic view for explaining a method of reinforcing the container.

Hereinafter, preferred embodiments of the container reinforcing method and the container support structure according to the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to this embodiment, and when there are a plurality of embodiments, the present invention also includes a combination of the respective embodiments.

FIG. 1 is a front view showing a container support structure reinforced by the container reinforcement method of the present embodiment, and FIG. 2 is a plan view showing a container support structure reinforced by the container reinforcement method of the present embodiment. FIG. 3 is a front view showing the support structure of the container to be reinforced by the container reinforcement method of the present embodiment, and FIG. 4 is a plan view showing the support structure of the container to be reinforced by the container reinforcement method of the present embodiment.

As shown in FIGS. 3 and 4, in the support structure of the old container, the tank 11 as a container is supported by a plurality of (four in this embodiment) support legs 12. The tank 11 has a spherical shape in which hemispherical portions are provided above and below the cylindrical portion. The support legs 12 are arranged at equal intervals in the circumferential direction of the tank 11. The support legs 12 include a leg body portion 13 having a U-shaped cross section, a ceiling portion 14 provided at an inclination at the upper end portion of the leg body portion 13, and an installation portion 15 provided horizontally at the lower end portion of the leg body portion 13. It is composed of and. The upper end of each support leg 12 is fixed to the lower part of the outer circumference of the tank 11 by welding via a mounting plate 16, and the installation portion 15 at the lower end is installed on the foundation 17 formed on the ground G.

On the other hand, as shown in FIGS. 1 and 2, the support structure of the new type of container reinforced and refurbished by the method of reinforcing the container of the present embodiment is a box in which the reinforcing members 21 are fixed to a plurality of support legs 12, respectively. The tank 11 is supported by the support legs 12 and the reinforcing members 21 after being reinforced in the shape of the mold cross section.

The reinforcing member 21 has a reinforcing portion 22, a ceiling portion 23, and an installation portion 24. The reinforcing portion 22 has a U-shaped cross section and is arranged along the vertical direction. The ceiling portion 23 is provided at the upper end portion of the reinforcing portion 22 in the longitudinal direction (vertical direction) so as to be inclined by a predetermined angle with respect to the horizontal direction. The installation portion 24 is provided horizontally at the lower end portion of the reinforcing portion 22 in the longitudinal direction (vertical direction).

The reinforcing member 21 forms a box-shaped cross-sectional shape by fixing the reinforcing portion 22 to the leg main body portion 13 of the support leg 12. At this time, the ceiling portion 23 of the reinforcing member 21 is fixed to the ceiling portion 14 of the support leg 12, and the lower end portion of the leg body portion 13 of the support leg 12 is fixed to the installation portion 24. Therefore, the new support leg in which the reinforcing member 21 is fixed to the support leg 12 has a square tubular cross-sectional shape, the upper end thereof is closed by the ceiling portions 14 and 23, and the installation portion 24 at the lower end portion becomes the foundation member 25. It is connected and supported by the foundation 26.

Here, a method for reinforcing the container of the present embodiment will be described. FIG. 5 is a flowchart showing a method for reinforcing the container of the present embodiment, and FIGS. 6 to 13 are schematic views for explaining the method for reinforcing the container.

The container reinforcement method of the present embodiment includes a step of removing the lower end portion of the support legs 12 in the container reinforcement method of reinforcing the plurality of support legs 12 supporting the tank 11 one by one (or at the same time). A step of installing the foundation member 25 on the ground G below the support leg 12, a step of fixing the reinforcing member 21 to the support leg 12 to reinforce it into a box-shaped cross-sectional shape (square cylinder cross-sectional shape), and a lower end of the reinforcing member 21. It has a step of connecting the portion to the base member 25.

As shown in FIGS. 6 and 7, in the tank 11, a plurality of support legs 12 are fixed to the lower part of the outer circumference, and each support leg 12 is supported on a foundation 17 whose lower part is formed on the ground G. There is. In this case, each support leg 12 has an installation portion 15 fixed to the lower end portion of the leg body portion 13, and the installation portion 15 is in close contact with the mounting surface of the foundation member (not shown) embedded in the foundation 17. , Are fastened by bolts 31.

As shown in FIG. 5, in step S11, the lower end portion of one of the plurality of support legs 12 supporting the tank 11 is cut and removed. That is, as shown in FIG. 6, in the support leg 12, the lower end portion of the leg body portion 13 is cut at a predetermined cutting position C1 by a cutting tool (not shown), and the bolt 31 is relaxed, as shown in FIG. In addition, a part of the lower end portion of the leg body portion 13 and the installation portion 15 are removed. Further, as shown in FIG. 7, in the support leg 12, the end portion in the circumferential direction of the leg body portion 13 is cut at a predetermined cutting position C2 by a cutting tool (not shown), so that the leg body is as shown in FIG. Part of the peripheral end of the portion 13 is removed to form the connecting portions 13a and 13b.

As shown in FIG. 8, a part of the lower end portion of the leg main body 13 and the installation portion 15 of one support leg 12 are removed by the above-mentioned work, and the lower end portion of one support leg 12 and the foundation 17 are attached. A gap is formed between them. At this time, the lower part of the tank 11 may be temporarily supported by a support jig (not shown) according to the weight of the tank 11.

After a part of the lower end of the leg body 13 and the installation portion 15 of one support leg 12 are removed, in step S12, the existing foundation 17 below the tank 11 is crushed to form an internal foundation member. (Not shown) is removed, and a part of the foundation 17 is removed. At this time, the foundation 17 may leave a part 17a (see FIG. 10) or remove all of it.

When a part of the foundation 17 and the internal foundation member are removed, a new foundation member 25 is installed in step S13 as shown in FIGS. 5 and 10. The foundation member 25 is configured by connecting the upper support plate 41 and the lower support plate 42 by the connecting member 43. First, a plurality of anchor bolts 44 are penetrated through the remaining existing foundation 17a and embedded up to the ground G. Next, the lower support plate 42 of the foundation member 25 is passed through the upper part of the anchor bolt 44, and the upper and lower nuts 45 and 46 are screwed into the threaded portion to connect the foundation member 25 to the anchor bolt 44. By this work, a new foundation member 25 is newly installed on the ground G.

When a new foundation member 25 is newly installed on the ground G, the height of the mounting surface of the foundation member 25 with respect to the tank 11 is adjusted in step S14. That is, the base member 25 is positioned vertically in the vertical position by the lower support plate 42 being sandwiched by the nuts 45 and 46 and fixed to the upper part of the anchor bolt 44. Then, the installation portion 24 of the reinforcing member 21 fixed to the support leg 12 is installed on the upper surface (mounting surface) 41a of the upper support plate 41 of the foundation member 25. Therefore, a predetermined position in the tank 11, for example, the distance from the mounting portion of the support leg 12 to the upper surface 41a of the upper support plate 41 is the distance from the mounting portion of the support leg 12 to the upper surface of the existing foundation member 25. Adjust the height of the base member 25. Specifically, by rotating the nuts 45 and 46, the pinching position of the lower support plate 42 by the nuts 45 and 46 is moved up and down, and the height of the upper surface 41a of the upper support plate 41 is adjusted.

When the height of the foundation member 25 with respect to the tank 11 is adjusted, the reinforcing member 21 is fixed to the support leg 12 and reinforced in step S15 as shown in FIG. As shown in FIGS. 11 and 12, the reinforcing member 21 is composed of a reinforcing portion 22, a ceiling portion 23, and an installation portion 24. The reinforcing portion 22 is formed by connecting the three reinforcing plates 22a, 22b, and 22c by welding so as to form a U-shaped cross section. At this time, groove portions are formed at both side ends of the reinforcing plate 22a, and the reinforcing plates 22b and 22c are brought into contact with the respective groove portions in orthogonal directions, and groove welding (groove welded portion) is performed in this state. Perform W1 and W2). Further, the reinforcing plates 22b and 22c form groove portions at one side end portion, and the connecting portions 13a and 13b of the leg main body portion 13 of the support leg 12 abut on each groove portion in a continuous direction. In this state, groove welding (groove welded portions W3 and W4) is performed.

Further, the ceiling portion 23 of the reinforcing member 21 and the ceiling portion 14 of the support leg 12 are welded in the same manner, and the installation portion 24 of the reinforcing member 21 and the leg body portion 13 of the support leg 12 are welded in the same manner. Therefore, by fixing the reinforcing member 21 to the support leg 12, a new support leg reinforced so as to form a box-shaped cross-sectional shape having a closed structure inside is formed. The reinforcing plates 22a, 22b, and 22c are connected by welding, and the reinforcing member 21 is formed by connecting the reinforcing portion 22, the ceiling portion 23, and the installation portion 24 by welding in advance. Manufactured at a factory and transported to the site.

When the reinforcing member 21 is fixed to the support legs 12, the mounting surface of the foundation member 25 (upper surface 41a of the upper support plate 41) with respect to the height of the mounted surface (lower surface of the installation portion 24) at the lower end of the reinforcing member 21. Readjust the height. That is, although the height of the mounting surface of the foundation member 25 with respect to the tank 11 was adjusted in step S14, there is a possibility that an adjustment error or the like may occur, and the position of the lower surface of the installation portion 24 on the reinforcing member 21 and the foundation member 25 The position of the upper surface 41a of the upper support plate 41 in the above is confirmed. Here, if there is a discrepancy between the two, the height of the foundation member 25 is finely adjusted.

Then, as shown in FIG. 5, in step S16, the lower end portion of the reinforcing member 21 is connected to the foundation member 25. That is, with the lower surface of the installation portion 24 of the reinforcing member 21 in close contact with the upper surface 41a of the upper support plate 41 of the foundation member 25, the bolt 61 is passed through the installation portion 24 and the upper support plate 41 from below and from above. By screwing the nuts 62 and 63 into the threaded portion of the bolt 61, the installation portion 24 and the upper support plate 41 are fastened.

When the reinforcing member 21 is fixed to the support leg 12 and the reinforcing member 21 is connected to the foundation member 25, as shown in FIGS. 5 and 13, in step S17, a new foundation 26 is used using a formwork (not shown). Is newly established. When the reinforcement of one support leg 12 is completed, the processes of steps S11 to S17 described above are also carried out for the other three support legs 12. By fixing the reinforcing member 21 to the plurality of support legs 12 that support the tank 11 in this way, the reinforcing work is completed.

As described above, in the method for reinforcing the container of the present embodiment, in the method for reinforcing the container for reinforcing the plurality of support legs 12 that support the tank 11, the step of removing the lower end portion of the support legs 12 and the support legs 12 The process of installing the foundation member 25 on the ground G below the ground, the process of fixing the reinforcing member 21 to the support legs 12 to reinforce it into a box-shaped cross-sectional shape (square cylinder cross-sectional shape), and the base of the lower end of the reinforcing member 21. It has a step of connecting to the member 25.

Therefore, the support rigidity of the tank 11 can be improved by fixing the reinforcing member 21 to the support legs 12 that support the tank 11 and reinforcing the tank 11 in a box-shaped cross-sectional shape. Further, since the support rigidity of the tank 11 can be improved without replacing the tank 11, it is not necessary to transfer the internal fluid, and the increase in the cost generated can be suppressed.

In the method for reinforcing the container of the present embodiment, as the support legs 12, the leg main body 13 whose upper end is fixed to the tank 11 and the installation portion provided below the leg main body 13 and supported by the existing foundation 17 15 is provided, and the installation portion 15 of the support leg 12 is removed. Therefore, when removing the lower end portion of the support leg 12, in order to remove the installation portion 15, a new installation portion 24 may be provided on the reinforcing member 21 side, and the lower end portion of the reinforcing member 21 may be provided using the installation portion 24. It can be easily connected to the foundation member 25, and workability can be improved.

In the method for reinforcing the container of the present embodiment, as the reinforcing member 21, the reinforcing portion 22 is fixed to the support leg 12 to form a box-shaped cross-sectional shape, and the reinforcing portion 22 is provided at the lower end portion of the reinforcing portion 22 and is connected to the base member 25. An installation unit 24 is provided. Therefore, the reinforcing member 21 can be easily fixed to the support legs 12 by forming the reinforcing member 21 from the reinforcing portion 22 forming the box-shaped cross-sectional shape and the installation portion 24 provided at the lower end portion of the reinforcing portion 22. At the same time, it can be connected to the foundation member 25, and workability can be improved.

In the method for reinforcing the container of the present embodiment, the ceiling portion 23 that closes the upper end portion of the reinforcing portion 22 is provided as the reinforcing member 21. Therefore, it is possible to prevent water from entering the inside of the box-shaped cross-sectional shape formed by the support legs 12 and the reinforcing member 21, and it is possible to improve the durability.

In the container reinforcement method of the present embodiment, after the foundation member 25 is installed on the ground G, the height of the mounting surface of the foundation member 25 with respect to the tank 11 is adjusted. Therefore, the support legs 12 can be reinforced without changing the position of the tank 11, and workability can be improved.

In the method for reinforcing the container of the present embodiment, after the reinforcing member 21 is fixed to the support leg 12, the height of the mounting surface of the base member 25 with respect to the height of the mounted surface at the lower end of the reinforcing member 21 is readjusted. There is. Therefore, the support rigidity of the tank 11 can be appropriately improved without applying a load to the support legs 12 and the reinforcing member 21.

In the method for reinforcing the container of the present embodiment, the reinforcing member 21 has a U-shaped cross-sectional shape, groove portions are formed at each end of the U-shaped cross-sectional shape, and the groove portions are brought into contact with the support legs 12 for groove welding. By carrying out the above, the reinforcing member 21 is fixed to the support leg 12. Therefore, by fixing the support leg 12 and the reinforcing member 21 by groove welding, it is possible to secure high rigidity of the box-shaped cross-sectional shape of the support leg 12 and the reinforcing member 21 formed after the fixing.

In the method for reinforcing the container of the present embodiment, the support legs 12 have a U-shaped cross-sectional shape, and each end of the U-shaped cross-sectional shape is processed to form connecting portions 13a and 13b, and groove portions are formed on the connecting portions 13a and 13b. The reinforcing member 21 is fixed to the support leg 12 by performing groove welding in contact with the support leg 12. Therefore, each end of the support leg 12 is processed in advance to form the connecting portions 13a and 13b, and the groove portion of the reinforcing member 21 is brought into contact with the connecting portions 13a and 13b to perform groove welding. As a result, the support legs 12 and the reinforcing member 21 can be properly connected, and the high rigidity of the box-shaped cross-sectional shape of the support legs 12 and the reinforcing member 21 can be ensured.

Further, the support structure of the container of the present embodiment has been modified by the method of reinforcing the container of the present embodiment. Therefore, the support rigidity of the tank 11 can be improved by fixing the reinforcing member 21 to the support legs 12 that support the tank 11 and reinforcing the tank 11 in a box-shaped cross-sectional shape.

In the above-described embodiment, the reinforcing member 21 having a U-shaped cross section is fixed to the support leg 12 having a U-shaped cross section to form a box-shaped cross section, but the present invention is not limited to this configuration. For example, a reinforcing member having an L-shaped cross section is fixed to a support leg having an L-shaped cross section to form a box-shaped cross section, or a reinforcing member having a U-shaped cross section is fixed to a support leg having an I-shaped cross section. It may have a box-shaped cross-sectional shape. Further, the box-shaped cross-sectional shape is not limited to the square tubular cross-sectional shape, and may be a polygonal tubular cross-sectional shape, a cylindrical cross-sectional shape, or the like.

Further, in the above-described embodiment, the tank 11 is applied as the container, but it may also be applied to a heat exchanger or the like.

11 Tank (container)
12 Support legs 13 Leg body 14 Ceiling 15 Installation 16 Mounting plate 17 Existing foundation 21 Reinforcement member 22 Reinforcement 23 Ceiling 24 Installation 25 Foundation member 26 New foundation

Claims (9)

In the method of reinforcing a container that reinforces a plurality of support legs that support the container,
The step of removing the lower end of the support leg and
The process of installing a new foundation member on the ground below the support legs,
The process of fixing the reinforcing member to the support leg to reinforce it into a box-shaped cross-sectional shape,
A step of connecting the lower end of the reinforcing member to the foundation member, and
A method for reinforcing a container, which comprises having a container. The reinforcing member is characterized by having a reinforcing portion fixed to the support leg to form a box-shaped cross-sectional shape, and an installation portion provided at the lower end portion of the reinforcing portion and connected to the foundation member. The method for reinforcing a container according to claim 1. The support leg has a leg main body portion whose upper end is fixed to the container and an installation portion provided below the leg main body portion and supported by an existing foundation, and the installation portion of the support leg. The method for reinforcing a container according to claim 1 or 2, wherein the container is removed. The method for reinforcing a container according to claim 2 , wherein the reinforcing member has a ceiling portion that closes an upper end portion of the reinforcing portion. The method for reinforcing a container according to any one of claims 1 to 4, wherein the height of the mounting surface of the foundation member with respect to the container is adjusted after the foundation member is installed on the ground. The fifth aspect of claim 5, wherein after fixing the reinforcing member to the support leg, the height of the mounting surface of the foundation member is readjusted with respect to the height of the mounted surface at the lower end of the reinforcing member. How to reinforce the container. The reinforcing member has a U-shaped cross-sectional shape, a groove portion is formed at each end portion of the U-shaped cross-sectional shape, and the groove portion is brought into contact with the support leg to perform groove welding. The method for reinforcing a container according to any one of claims 1 to 6, wherein the reinforcing member is fixed to a support leg. The support legs have a U-shaped cross-sectional shape, and each end of the U-shaped cross-sectional shape is processed to form a connecting portion, and the groove portion is brought into contact with the connecting portion to perform groove welding. The method for reinforcing a container according to claim 7, wherein the reinforcing member is fixed to the support leg. A container support structure characterized by being modified by the method for reinforcing a container according to any one of claims 1 to 8.

Images