JP5862221B2 - Reinforcing method for storage structure and reinforcing structure for storage structure - Google Patents

Description

  The present invention relates to a method for reinforcing a storage structure and a reinforcing structure of the storage structure.

  As a storage structure, a ground tank (outdoor tank) for storing a flammable liquid such as oil is known. Some of these ground tanks have tsunami countermeasures, particularly in the case of tanks that face the sea. For example, Patent Document 1 discloses a configuration in which a tsunami protection fence is installed around the tank body.

  In addition, there are also known measures against damage caused by earthquakes. For example, Patent Document 2 discloses a structure in which a liquid bank is provided to receive the liquid in the ground tank that has flowed out due to breakage.

JP 2007-302281 A Japanese Patent Laid-Open No. 2002-80091

By the way, among the already installed ground tanks (storage structures), there are many that have not been taken measures as disclosed in Patent Documents 1 and 2, and those that are not provided with anchors. There are also many. Therefore, assuming that a large earthquake and a tsunami associated therewith will occur, reinforcement of such existing ground tanks has become a major issue. That is, for example, when a tsunami occurs due to a large earthquake, the ground tank may be swept away by the tsunami, and the storage function may be lost due to overturning, or damage may be caused by contact with other structures.
However, the installation of protective fences and breakwaters around the above-ground tanks is particularly important for reinforcement of existing structures, and it is sufficient to install protective fences and breakwaters around the tanks. Without space, it is difficult to implement such reinforcement.

  The present invention has been made in view of the above circumstances, and the object of the present invention is to reinforce a storage structure that enables countermeasures against tsunami and the like by simple construction and without requiring a large space. It is an object to provide a method and a reinforcing structure for a storage structure.

In the method for reinforcing a storage structure according to the present invention, a rib member having a plate-like portion or a rod-like portion is erected in the height direction of the storage structure from the peripheral surface outside the side peripheral surface of the storage structure. Bonding and fixing to the side peripheral surface of the storage structure in a state, arranging a plurality of the rib members along the circumferential direction of the storage structure, and bonding and fixing each,
A plurality of plate members having anchor fixing hooks are placed on the upper end of the rib member, and the plate members are connected to form a cylindrical body winding, which surrounds the side circumferential surface of the storage structure with the body winding. And a process of
Connecting the anchor fixing hook and the ground side with an anchor cable.

Further, in the method for reinforcing the storage structure, it is preferable that the rib material is bonded with an epoxy resin adhesive.
In the method for reinforcing a storage structure, the structure is preferably a tank that stores a flammable liquid.
In the method for reinforcing a storage structure, the storage structure is preferably an existing structure.

In the reinforcing structure for a storage structure of the present invention, a rib member having a plate-like portion or a rod-like portion is formed on the side peripheral surface of the storage structure from the peripheral surface outside the side peripheral surface of the storage structure. A plurality of rib members are arranged along the circumferential direction of the storage structure, and are fixedly bonded to each other in a standing state in the height direction of the storage structure;
A plurality of plate members are placed on the upper ends of the rib members, and the plate members are arranged in a cylindrical shape along the circumferential direction of the storage structure, and the plate members are connected to each other to form a cylindrical body winding. And
The anchor fixing hook provided on the plate member and the ground side are connected by an anchor cable.

Moreover, in the reinforcing structure of the storage structure, the plate material is preferably bonded with an epoxy resin adhesive.
In the reinforcing structure for a storage structure, the structure is preferably a tank for storing a flammable liquid.

  According to the method for reinforcing a storage structure and the structure for reinforcing a storage structure of the present invention, the rib member is bonded and fixed in a standing state on the side peripheral surface of the storage structure, and the rib member is A plurality of arrangements are arranged along the circumferential direction of the storage structure and bonded and fixed, respectively, a plurality of plate members are placed on the upper ends of the rib members, and the plate members are arranged along the circumferential direction of the storage structure. It is arranged in a cylindrical shape, and the plate members are connected to form a cylindrical body winding, and the anchor fixing hook provided on the plate material and the ground side are connected by an anchor cable, so that the outer peripheral surface of the storage structure is All directions can be fixed to the ground side with a cylindrical trunk winding, anchor fixing hook and anchor cable. Therefore, it is possible to improve tipping resistance etc. with simple construction and to be an effective measure against tsunami etc. it can.

Further, the space required around the storage structure may be a space for fixing the end side of the anchor cable, and can be effectively reinforced without requiring a large space.
In addition, the rib material fixed to the storage structure is normally loaded only in the vertical direction, and most of this load is applied to the peripheral surface through the rib material. Can be minimized.
Furthermore, the rib material is fixed on the side peripheral surface of the storage structure by bonding, and the body winding is simply placed on the rib material, so that welding to the storage structure is not required, and therefore the stored material is flammable. Even if it is liquid of this, it can construct without trouble under the operating state which stored this.

It is the schematic block diagram which cut down the principal part of one Embodiment of the reinforcement structure of the structure for storage which concerns on this invention. It is a principal part perspective view of the reinforcement structure of the structure for storage shown in FIG. (A)-(e) is a figure for demonstrating one Embodiment of the reinforcement method of the structure for storage which concerns on this invention, (a), (c), (d) is principal part sectional side view, (B) is a principal part perspective view, (e) is a top view typically shown.

Hereinafter, the reinforcing method of the storage structure and the reinforcing structure of the storage structure according to the present invention will be described in detail.
FIG. 1 is a view showing an embodiment of a reinforcing structure for a storage structure according to the present invention. Reference numeral 1 in FIG. 1 denotes a ground tank (outdoor tank) as a storage structure. This ground tank 1 is an existing one installed on a foundation mound 2 for storing a flammable liquid, such as petroleum, at room temperature. The foundation mound 2 is embedded in the ground G, and the ring concrete 3 is arranged in an annular shape around the foundation mound 2.

  An asphalt mortar 4 is laid on the foundation mound 2, and a ground tank 1 is provided on the asphalt mortar 4. The ground tank 1 includes a bottom portion 5 provided on the asphalt mortar 4, a cylindrical side plate 6, and a lid portion (not shown) that covers an upper opening of the side plate 6. The bottom 5 is formed of an annular annular plate 7 and a bottom plate 8 provided in the annular plate 7, and the side plate 6 is disposed on the annular plate 7.

A plurality of elongate rib members 9 are attached to the side plate 6 on the bottom 5 side on the side peripheral surface (outer peripheral surface), and a cylindrical (annular) body winding 10 is provided on the rib members 9. Yes.
As the rib member 9, in this embodiment, a steel member having a T-shaped cross section as shown in FIG. 2 is used. This steel material (rib material 9) is a cut T material (CT shape steel) obtained by cutting one side of an H-shaped steel or an I-shaped steel, and has an elongated rectangular plate-like support plate 9a and one of the support plates 9a. It is composed of an elongated rectangular plate-like sticking plate 9b that is in contact with the end surface on the long side. The support plate 9a is a plate-like portion or a rod-like portion that the rib member 9 has in the present invention. Further, the affixing plate 9 b is an affixing portion that is affixed to the side plate 6.

  The rib material 9 (cut T material) is a peripheral surface located outside the side plate 6 (side peripheral surface) of the underground tank 1, in this embodiment, the outer peripheral portion of the annular plate 7 extending outward from the side plate 6. The affixing plate 9b is bonded and fixed to the side plate 6 (side peripheral surface) of the underground tank 1 in a state where it is erected from the upper surface in the height direction (usually the vertical direction) of the underground tank 1. That is, the rib member 9 is bonded and fixed so that the support plate 9a is raised vertically upward from the peripheral surface (the upper surface of the outer peripheral portion of the annular plate 7). As a result, the rib member 9 is arranged such that the side end surface of the support plate 9a opposite to the attaching plate 9b faces outward in the radial direction of the side plate 6, so that the short side of the support plate 9a is outside of the side plate 6 in the radial direction. It is extended toward.

  As such a rib member 9, for example, the thickness is about 10 mm to 20 mm, the length (the length of the long side of the support plate 9a) is about several tens of cm to several meters, and the width (the length of the short side of the support plate 9a). A cut T material having a thickness of about several centimeters to several tens of centimeters is preferably used. The length of the rib member 9 is appropriately determined according to the length of the anchor cable described later, its angle (anchor angle), etc., since this determines the height position of the body winding 10 described later. .

The number of rib members 9 to be bonded and fixed is appropriately determined according to the size of the underground tank 1, that is, the circumferential length of the outer peripheral surface (side plate 6). For example, about 12 to 64 are arranged at equal intervals along the circumferential direction.
Further, the lengths of these rib members 9 are adjusted so that the level of the upper end is uniform. In the present embodiment, the installation surface of the rib member 9 is the upper surface of the outer peripheral portion of the annular plate 7 and the height (level) thereof is uniform, so that the rib members 9 are basically all adjusted to the same height. Has been.

  For bonding the rib member 9 to the side plate 6, an epoxy resin adhesive used in various civil engineering methods as an adhesive provides sufficient strength and is easy to handle. It is preferably used. However, this invention is not limited to this, You may make it adhere | attach the rib material 9 using adhesive agents other than an epoxy resin adhesive.

  A cylindrical (annular) body winding 10 is provided on the upper ends of the rib members 9. In the body winding 10, a plurality of bent plate materials 11 made of steel plates or the like are arranged in a cylindrical shape along the circumferential direction of the side plate 6 of the underground tank 1, and adjacent ones are connected to each other and integrated. The bent plate material 11 is a circular plate having a thickness corresponding to the cylindrical side plate 6 and having a thickness of about 10 mm to 20 mm, and has a size (long) that divides the circumference of the side plate 6 into, for example, 6 to 8. And the length of a connecting portion (overlapping portion) to be described later.

  For example, as shown in FIG. 2, the bent plate members 11 and 11 are connected to each other at the side end portion of the bent plate member 11 over the side end portion of the other bent plate member 11. It is done by doing. As an adhesive, an epoxy resin adhesive is preferably used, as in the case of bonding the rib member 9. However, it goes without saying that bonding between the bent plate materials 11 and 11 may be performed using an adhesive other than the epoxy resin adhesive.

  The body winding 10 formed in this way is simply placed on the upper end of the rib member 9, that is, on the short side which is the upper end of the support plate 9 a, and is thus installed on the side plate 6 of the ground tank 1. On the other hand, it is surrounded by a state in which only a part is in contact or a state in which the whole is slightly spaced.

  An anchor fixing hook 12 is fixed to the bent plate material 11 in advance by welding or the like. The anchor fixing hooks 12 are known ones having a ring-shaped hook portion 12a, and about 1 to 10 anchors are fixed in the length direction according to the size (length) of the bent plate material 11. That is, it is arrange | positioned in the appropriate location of each bending board | plate material 11 so that about 12-80 pieces may be arrange | positioned at equal intervals in the perimeter of the side plate 6 of the ground tank 1 in total. The number of anchor fixing hooks 12 is appropriately determined according to the size of the ground tank 1, that is, the length of the circumference thereof.

  One end side of the anchor cable 13 is connected to the hook portion 12 a of the anchor fixing hook 12. The anchor cable 13 is made of, for example, a PC steel wire cable, and one end thereof is connected and fixed to the hook portion 12a by a fixture (not shown) such as a crimping grip. Moreover, the other end part of the anchor cable 13 is being fixed to the ground G side, as shown in FIG.

  For example, at the other end of the anchor cable 13, a hole 3a is formed in the ring concrete 3, and an adhesive (not shown) is filled in the hole 3a, and the other end is inserted to cure the adhesive. Is fixed to the ring concrete 3. However, the present invention is not limited to this. For example, when it is desired to set the length of the anchor cable 13 or the angle (anchor angle) α between the anchor cable 13 and the side plate 6 of the ground tank 1 to a desired value, the ring A hole is directly drilled in the ground G inside or outside the concrete 3 instead of the concrete 3, and the other end of the anchor cable 13 is grounded by filling the hole with an adhesive and inserting the other end to cure the adhesive. You may fix to the G side.

Next, one embodiment of the method for reinforcing the storage structure (ground tank 1) according to the present invention will be described based on the method for reinforcing the ground tank 1 as described above.
It is assumed that the ground tank 1 is an existing one provided near the sea, and has not been sufficiently provided for countermeasures against tsunamis such as protective fences and liquid breakwaters as disclosed in Patent Documents 1 and 2 above. For such a ground tank 1, it is necessary to take a new or more sufficient tsunami countermeasure. Therefore, in this embodiment, reinforcement as a tsunami countermeasure is performed in the following steps.

First, a predetermined number of rib members 9 are prepared and their heights (lengths) are adjusted. Usually, each height is formed at the same preset height. In addition, as such a rib material 9, the cut T material as described above is preferably used.
In addition to the rib material 9, a plurality of bent plate materials 11 corresponding to the side plates 6 of the ground tank 1 are prepared, and anchor fixing hooks 12 are fixed to the outer surface side of the bent plate materials 11 by welding or the like. The number of anchor fixing hooks 12 to be fixed to the bent plate material 11 is determined based on the reinforcement strength required for the ground tank 1, that is, the force for holding the ground tank 1 against the tsunami. .

  The length (size) of the bent plate material 11 is formed by adding the length of the overlapping portion to the length when the circumference of the side plate 6 of the ground tank 1 is divided into a predetermined number. That is, when a predetermined number of bent plate members 11 are arranged side by side in a cylindrical shape on the side plate 6 of the ground tank 1 while being sequentially stacked in the circumferential direction, the side plate 6 is set to a length that makes one round. The length of the bent plate material 11 is not particularly limited, but after being lifted by a crane and placed on the rib material 9, the side plate 6 of the ground tank 1 is overlapped and bonded to each other in the circumferential direction, It is preferable that the length is suitable for forming into a cylindrical shape.

  As for the length of the overlapping portion, the necessary adhesive strength between the bent plate members 11 and 11 is obtained in advance by simulation or the like, and is set so as to satisfy the adhesive area. Furthermore, the width of the bent plate material 11 is also set in advance so as to have a bonding area that satisfies the required bonding strength.

  As the adhesive, an epoxy resin adhesive capable of obtaining sufficient strength is preferably used. A predetermined amount of this adhesive is applied in advance to the back surface of the affixing plate 9b of the rib member 9, and the rib member 9 thus coated with the adhesive is lifted by a crane or the like, as shown in FIG. Are arranged on the annular plate 7 (a peripheral surface outside the side peripheral surface of the ground tank 1) and the back surface of the affixing plate 9b is placed at a predetermined position on the side plate 6 (side peripheral surface) of the ground tank 1. Put them in order.

  That is, a predetermined number of rib members 9 prepared in advance and coated with an adhesive are arranged on the side plate 6 at a predetermined interval in the circumferential direction, and bonded and fixed respectively. In addition, about an adhesive agent, you may make it apply | coat when aligning on the side board 6 without apply | coating to the sticking board 9b previously.

  In addition, the rib material 9 is adjusted in advance so that the height (level) of the upper end thereof is the same, and is leveled by partially cutting even after bonding, if necessary. To do. That is, a convex portion is formed on the upper surface of the outer peripheral portion of the annular plate 7 due to other members being installed, and when the rib material 9 needs to be installed on this convex portion, The length is adjusted so that the level matches the upper end level of the other rib member 9.

  Here, since the adhesive requires a certain amount of time until a predetermined adhesive strength is exhibited, the adhesive is lifted by a crane, pasted on the side plate 6, and then the rib material 9 is pressed against the side plate 6 by the crane or the like. The adhesive state is maintained, and the adhesive has a predetermined adhesive strength. Such an expression of adhesive strength occurs at room temperature with an epoxy resin adhesive, so there is no risk of sparks as in welding, and heating is not required. Therefore, about the ground tank 1, the rib material 9 can be stuck (adhered) and fixed in the state where the flammable liquid is stored, that is, in the operating state.

Next, while sequentially placing the bent plate material 11 along the circumferential direction of the side plate 6 on the upper ends of these rib members 9, the other end is placed on the side end portion of the adjacent bent plate material 11 as shown in FIG. The side end portions of the bent plate material 11 are overlapped, and the overlapping portion is bonded with an adhesive. The adhesive may be applied in advance to the overlapping portion, or may be applied to one or both of the bent plate materials 11 when overlapping.
In this way, the bent plate material 11 is sequentially bonded and connected to form a cylindrical shape that circulates around the side plate 6 of the underground tank 1, thereby forming the body winding 10. Thus, the side plate 6 of the underground tank 1 is surrounded by the body winding 10.

  Next, as shown in FIG. 3C, one end side of the anchor cable 13 is connected to each anchor fixing hook 12 of each bent plate member 11. The anchor cable 13 can be connected by a conventionally known method such as using a fixing tool (not shown) such as a crimping grip.

  When one end side of the anchor cable 13 is connected to all the anchor fixing hooks 12, the other end side of the anchor cable 13 is connected to the ground G. In the present embodiment, as shown in FIG. 3D, holes 3a are formed in the ring concrete 3 at an angle, and an adhesive (not shown) is filled in the holes 3a. And the other end side of the anchor cable 13 is inserted into the hole 3a filled with the adhesive in this way, and the adhesive is cured in that state and held until the strength is developed. As the adhesive, urethane resin or epoxy resin civil engineering adhesives are preferably used.

  About anchor cable 13, what is necessary is just to be able to maintain the tension | tensile_strength only of the tension state, without exhibiting a big tension | tensile_strength at normal time. Therefore, connection and fixing of the other end side of the anchor cable 13 can be performed by a general method without using a special method.

When the ring concrete 3 is not provided with the existing ground tank 1, it is newly installed at the time of reinforcement, and the other end of the anchor cable 13 is connected to the newly installed ring concrete 3. Also good.
Further, instead of directly fixing the other end of the anchor cable 13 in the hole 3a of the ring concrete 3 as described above, for example, a fixing hook (not shown) is fixed in the hole 3a. The other end side of the anchor cable 13 may be indirectly fixed to the ring concrete 3 by fixing the other end side of the anchor cable 13 to the ring concrete 3.

  In this way, the other ends of all the anchor cables 13 are connected to the ground G side via the ring concrete 3 as shown in the plan view of FIG. 3 (e), whereby the anchor fixing hooks 12 and the ground G are connected. The reinforced ground tank 1 (storage structure) shown in FIG. 1 is obtained by connecting the sides with an anchor cable 13.

  In the present invention, as shown in FIG. 1, the angle (anchor angle) α formed between the anchor cable 13 and the side plate 6 of the ground tank 1 is desired to be a desired value (for example, 45 °), and the anchor When the length of the cable 13 is inappropriate for connecting to the ring concrete 3, the other end of the anchor cable 13 is connected directly to the ground G inside or outside the ring concrete 3, as described above. You may do it. That is, a hole is directly drilled in the rock in the ground G, and the other end of the anchor cable 13 is cured directly by filling the hole with the adhesive and inserting the other end to cure the adhesive. It may be fixed.

  In such a reinforcing method, the rib material 9 is bonded and fixed on the side plate 6 (side circumferential surface) of the ground tank 1 in a standing state, and the rib material 9 is aligned along the circumferential direction of the ground tank 1. A plurality of bent plate members 11 are formed on the upper end of the rib member 9 to form a cylindrical body winding 10, and the anchor fixing hook 12 and the ground G side are connected by an anchor cable 13. Therefore, all directions of the outer peripheral surface of the underground tank 1 can be fixed to the ground G side by the cylindrical trunk 10, the anchor fixing hook 12 and the anchor cable 13. It can be an effective measure against tsunami.

Moreover, the space required around the ground tank 1 may be a space for fixing the other end side (end portion side) of the anchor cable 13, and therefore the reinforcement is effectively performed without requiring a large space. be able to.
Further, the rib member 9 fixed to the underground tank 1 is normally subjected to the load of the body winding 10 only in the vertical direction, and most of this load is applied to the annular plate 7 (peripheral surface) via the rib member 9. Therefore, the load applied to the underground tank 1 can be minimized. Therefore, there is no possibility of damaging the side plate 6 of the underground tank 1 during construction as well as after construction.

Further, the rib material 9 is fixed on the side peripheral surface of the ground tank 1 by adhesion, and the body winding 10 is simply placed on the rib material 9, so that welding to the storage structure becomes unnecessary, and therefore the stored material is not stored. Even if it is a flammable liquid, construction can be performed without any trouble under the operating state in which it is stored.
In addition, even when the use of the crane is restricted due to the size of the site, the location conditions, etc., the number of rib members 9 and bent plate members 11 is determined according to the restrictions, and the weight of the rib members 9 and bent plate members 11 By adjusting the size, it will be possible to fully respond to site constraints.

  In addition, the ground tank 1 (storage structure) reinforced by such a reinforcing method has improved anti-falling property as described above and effective measures against tsunamis and the like have been taken. Even if a tsunami caused by an earthquake or the like is encountered, inconveniences such as being swept away by the tsunami or falling to impair the storage function are avoided.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.
For example, the storage structure according to the present invention is not limited to a ground tank for storing oil or the like, and may be a warehouse for storing various materials, intermediate products, various products, and the like. The reinforcing method and the structure of the present invention can also be applied to the reinforcement.

  In the above-described embodiment, the outer peripheral portion of the annular plate 7 that extends outward from the side plate 6 on the outer peripheral surface of the side plate 6 (side peripheral surface) of the underground tank 1 (storage structure) on which the rib material 9 is erected. If the annular plate 7 extending outward from the side plate 6 is not sufficient or there is no annular plate 7, the outer surface of the annular plate 7 and the installation surface of the underground tank 1 are described above. A peripheral surface may be used, and the rib material 9 may be erected on the peripheral surface.

DESCRIPTION OF SYMBOLS 1 ... Ground tank (storage structure), 6 ... Side plate, 9 ... Rib material, 9a ... Support plate, 10 ... Body winding, 11 ... Bending plate material (plate material), 12 ... Anchor fixing hook, 13 ... Anchor cable, G …ground

Claims (7)

A rib member having a plate-like portion or a rod-like portion is placed on the side peripheral surface of the storage structure in a state of standing in the height direction of the storage structure from the peripheral surface outside the side peripheral surface of the storage structure. Adhering and fixing, a plurality of the rib members are arranged along the circumferential direction of the storage structure, and each of them is bonded and fixed.
A plurality of plate members having anchor fixing hooks are placed on the upper end of the rib member, and the plate members are connected to form a cylindrical body winding, which surrounds the side circumferential surface of the storage structure with the body winding. And a process of
Connecting the anchor fixing hook and the ground side with an anchor cable, and a method for reinforcing a storage structure.   The method for reinforcing a storage structure according to claim 1, wherein the rib material is bonded with an epoxy resin adhesive.   The method for reinforcing a storage structure according to claim 1 or 2, wherein the storage structure is a tank for storing a flammable liquid.   The method for reinforcing a storage structure according to any one of claims 1 to 3, wherein the storage structure is an existing structure. On the side peripheral surface of the storage structure, a rib member having a plate-like portion or a rod-like portion was erected in the height direction of the storage structure from the peripheral surface outside the side peripheral surface of the storage structure. a state being adhered and fixed in a state, and a state in which the rib member is bonded and fixed respectively with a plurality arranged along the circumferential direction of the storage structures for,
A plurality of plate members are placed on the upper ends of the rib members, and the plate members are arranged in a cylindrical shape along the circumferential direction of the storage structure, and the plate members are connected to each other to form a cylindrical body winding. And
A reinforcing structure for a storage structure, wherein an anchor fixing hook provided on the plate member and a ground side are connected by an anchor cable.
The reinforcing structure for a storage structure according to claim 5, wherein the rib material is bonded by an epoxy resin adhesive.   The reinforcing structure for a storage structure according to claim 5 or 6, wherein the storage structure is a tank for storing a flammable liquid.

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