JP6327451B2 - Floating fence - Google Patents

Description

  The present invention is provided inside a breakwater that surrounds a tank that stores a liquid having a specific gravity lower than that of water or a liquid hazardous material, and a tsunami or a high wave is generated to submerge the breakwater, The present invention relates to a floating fence for reducing diffusion of stored liquid when the stored liquid leaks.

  Conventionally, it has been installed inside a breakwater that surrounds a tank that stores liquids with a specific gravity lower than that of water, liquid dangerous substances, etc. A floating type fence is known in which when a liquid leaks, the fence body rises to reduce the diffusion of the stored liquid (see, for example, Patent Document 1).

JP 2014-25219 A

  Among these floating fences, the fence body is moored with mooring lines on the ground or a breakwater, but if the expected tsunami or high wave height is high, the mooring lines mooring the fence body Need to be long. However, if the mooring line is long, the level of inundation caused by a tsunami or high wave will drop, the mooring line will sag, or it will move greatly from the ground or breakwater where the fence body is moored, causing leakage from the tank There is a possibility that the stored liquid cannot be kept inside the fence body at a predetermined position.

  Therefore, the present invention has an object to provide a floating fence that can reliably retain the stored liquid leaked from the tank inside the fence body at a predetermined position when the stored liquid leaks from the submerged tank. To do.

In order to achieve the above object, a floating fence according to the present invention includes a plurality of piles arranged at intervals inside a liquid barrier built around a tank that stores a liquid having a specific gravity lower than that of water. A body, a plurality of movable bodies supported at least partially by the plurality of pile bodies so as to be movable in the vertical direction and restrained from moving in a horizontal direction over a predetermined range, and a floating body capable of floating on the water surface, A fence body that is connected to the floating body and hangs down from the floating body when the floating body floats and expands in a cylindrical shape around the tank, and each of the plurality of pile bodies has an upper end portion that is the liquid barrier The plurality of moving bodies are respectively formed in an annular shape and are movable over the entire length in the vertical direction of the pile body with the pile body inserted therethrough. At least partly above the breakwater Configured to be movable to said fence body is characterized by being engaged with the plurality of mobile.

In the present invention, the plurality of moving bodies that lock the fence main body can move at least a part of each of the breakwaters, so that when the breakwater is submerged due to a tsunami or a high wave, In the vicinity of the water surface above the breakwater, the fence main body can be deployed in a cylindrical shape around the tank. For this reason, even if a tsunami or a high wave occurs and the liquid breakwater is submerged and the stored liquid leaks from the tank, the leaked stored liquid can be reliably retained inside the fence body.
And the plurality of moving bodies that lock the fence body are restrained from moving horizontally in a predetermined range or more. It is possible to prevent movement in the horizontal direction over a predetermined range. For this reason, even when the water level of the inundation due to a tsunami or a high wave is lowered, the leaked stored liquid can be reliably retained inside the fence body at a predetermined position.

Moreover, in the levitated fence according to the present invention, the plurality of pile bodies are arranged such that the upper ends of the plurality of pile bodies are located above the upper ends of the liquid barriers, and the plurality of moving bodies are each formed in an annular shape. The pile body is configured to be movable over the entire length in the vertical direction of the pile body with the pile body inserted therethrough .
By setting it as such a structure, since a mobile body does not leave | separate from a pile body, it can prevent that a fence main body leaves | separates largely from a pile body. For this reason, even when the level of water inundation caused by a tsunami or a high wave is lowered, the leaked stored liquid can be reliably retained inside the fence body at a predetermined position.

Moreover, in the floating fence according to the present invention, it is preferable that the interval between the adjacent piles is set smaller than the diameter of the tank.
With such a configuration, when a tsunami or a high wave occurs and the breakwater is submerged, the tank can be prevented from drifting to the outside of the arranged pile bodies even if the tank rises. In addition, the plurality of pile bodies can reduce the occurrence of tsunami and high wave drifting objects colliding with the tank.

According to the present invention, the plurality of moving bodies that lock the fence body can move at least a part of each of the plurality of moving bodies to the upper side of the breakwater, so that a tsunami or a high wave is generated and the breakwater is submerged. However, in the vicinity of the water surface above the liquid breakwater, the fence body can be deployed in a cylindrical shape around the tank. For this reason, even if a tsunami or a high wave occurs and the liquid breakwater is submerged and the stored liquid leaks from the tank, the leaked stored liquid can be reliably retained inside the fence body.
And the plurality of moving bodies that lock the fence body are restrained from moving horizontally in a predetermined range or more. It is possible to prevent movement in the horizontal direction over a predetermined range. For this reason, even when the water level of the inundation due to a tsunami or a high wave is lowered, the leaked stored liquid can be reliably retained inside the fence body at a predetermined position.

It is a top view which shows an example of the floating fence by 1st Embodiment of this invention. It is the sectional view on the AA line of FIG. 1 at the normal time. It is a figure which shows the levitation | floating type | formula at the time of a tsunami and a high wave producing, and being flooded, and is BB sectional drawing of FIG. It is a figure which shows the floating type fence when the floating body of FIG. 3 moves the water surface. It is a top view which shows an example of the floating fence by 2nd Embodiment of this invention. It is a figure which shows a floating type fence when a tsunami and a high wave generate | occur | produce, and is CC line sectional drawing of FIG. It is a figure which shows the floating type fence in a state whose water level is lower than FIG.

(First embodiment)
Hereinafter, the floating fence according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4.
As shown in FIG. 1 and FIG. 2, the levitating fence 1 according to the first embodiment includes a breakwater 13 surrounding a tank 12 for storing a storage liquid 11 such as oils or liquid dangerous substances having a specific gravity lower than that of water. It is provided on the inside, and is provided to reduce the diffusion of the stored liquid 11 when a tsunami or a high wave occurs and the liquid breakwater 13 is submerged and the stored liquid 11 in the tank 12 leaks.
In this embodiment, the tank 12 is erected on the ground G, and the outer shape is formed in a substantially cylindrical shape.
Further, the liquid breakwater 13 is a wall body having a square tube whose outer shape is substantially square in plan view, and the tank 12 is disposed in the center of the inside. The liquid breakwater 13 has an inner peripheral surface that is separated from the outer peripheral surface of the tank 12, an upper end portion 13 a is disposed below the upper end portion 12 a of the tank 12, and is constructed at a height lower than the tank 12.

  The floating fence 1 moves in the vertical direction to a plurality of steel pipe piles (pile bodies) 2, 2... And a plurality of steel pipe piles 2, 2. A plurality of lower cables (moving bodies) 3, 3,. 5 is provided.

  The plurality of steel pipe piles 2, 2... Are arranged in the vicinity of the inner peripheral surface of the liquid barrier 13 along the inner peripheral surface of the liquid barrier 13 with a predetermined interval in the horizontal direction. The steel pipe piles 2, 2... Are arranged at the upper end 2 a below the upper end 12 a of the tank 12 and above the upper end 13 a of the liquid barrier 13. The height is lower and higher than the breakwater 13.

  Each of the lower cables 3, 3... Is formed in an annular shape, and is configured to be movable over the entire length in the vertical direction of the steel pipe pile 2 with the steel pipe pile 2 inserted therethrough. The lower cables 3, 3... Are provided for the plurality of steel pipe piles 2, 2. Each of the lower cables 3, 3... Is made of a material having a specific gravity higher than that of water.

As shown in FIGS. 3 and 4, the floating body 4 is composed of, for example, a hollow body, an air bag, a foam material, and the like, and can float on the water surface 14 when a tsunami or a high wave occurs and the breakwater 13 is submerged. It is configured. In the first embodiment, the floating body 4 is divided into a plurality of pieces.
The floating body 4 is normally deflated like an air bag, and when a tsunami or high wave is generated and the breakwater 13 is submerged, air or gas is injected, and the floating body 4 is instantly expanded and buoyant. It is good also as a thing of the form which ensures.

The fence body 5 is composed of various sheet materials and film materials that are generally used as oil fences, and is formed in a cylindrical shape.
The fence body 5 has one end 5 a in the axial direction connected to the floating body 4 via the upper cable 6. The upper cable 6 is connected to the lower cables 3, 3... Via a plurality of connecting wires 7, 7. Further, the fence body 5 is connected to the connection wires 7, 7.
And when the floating body 4 floats on the water surface 14, the fence main body 5 is hung from the floating body 4, and is comprised so that it may expand | deploy in the cylinder shape which makes the axis | shaft the up-down direction. For this reason, the floating body 4 has a buoyancy capable of floating on the water surface 14 in a state where the fence main body 5, the upper cable 6, the connection wires 7, 7... And the lower cables 3, 3.

The lower cables 3, 3 ... are made of a material having a specific gravity greater than that of water. Therefore, even when the lower cables 3, 3 ... are lifted together with the floating body 4, tension is applied to the connecting wires 7, 7 ... in an attempt to move downward. It is configured as follows. And since the fence main body 5 is connected with the connection wires 7, 7,..., The tension acting on the connection wires 7, 7,... Is transmitted to the fence main body 5, and the deflection of the fence main body 5 in the axial direction is reduced. It is configured as follows.
Moreover, in 1st Embodiment, the fence main body 5 is arrange | positioned between the plurality of steel pipe piles 2, 2, ... and the liquid-proof embankment 13 so that the several steel pipe piles 2, 2 arranged may be enclosed. Accordingly, the floating body 4, the upper cable 6, and the connection wires 7, 7... Are also interposed between the plurality of steel pipe piles 2, 2. Has been placed.

  Such a floating fence 1 is normally stored on the ground G as shown in FIG. 2, and as shown in FIGS. 3 and 4, a tsunami or a high wave is generated and the breakwater 13 is formed. When submerged, the floating body 4 floats on the water surface 14, and the fence body 5 that hangs down from the floating body 4 is deployed in a cylindrical shape around the tank 12. At this time, since the floating body 4 and the fence body 5 are locked to the lower cables 3, 3... That can move in the vertical direction along the steel pipe piles 2, 2. However, the floating body 4 floats on the water surface 14, and the fence body 5 is developed in a cylindrical shape near the water surface 14.

When the tank 12 (see FIG. 1 and FIG. 2) is damaged in the submerged state and the stored liquid 11 in the tank 12 leaks from the tank 12, the fence body 5 has the stored liquid 11 leaked inside. It is configured to hold
For this reason, the volume inside the fence main body 5 deployed in a cylindrical shape is larger than the storage amount (volume) of the stored liquid 11 in the tank 12 so that the stored liquid 11 does not flow out from the fence main body 5 deployed in a cylindrical shape. Is also preferably large.
In addition, the fence main body 5 may be provided with a reinforcing material or the like for deploying in a cylindrical shape when it floats.

  Moreover, in 1st Embodiment, when the tsunami and high wave of the assumed height arise, and the breakwater 13 is submerged, the height of the steel pipe piles 2, 2... So that the floating body 4 can float on the water surface 14. And the lengths of the connecting wires 7, 7... Are set. In the steel pipe piles 2, 2..., An enlarged diameter portion (not shown) may be formed in the vicinity of the upper end 2a so that the lower cable 3 does not come out from the upper end 2a.

Next, the operation and effect of the floating fence 1 according to the first embodiment will be described with reference to the drawings.
In the floating fence 1 according to the first embodiment, a plurality of lower cables 3, 3... For locking the floating body 4 and the fence body 5 are movable to the upper side of the liquid barrier 13, thereby generating a tsunami and a high wave. Even when the breakwater 13 is submerged, the fence body 5 can be deployed around the tank 12 in a cylindrical shape near the water surface 14 above the breakwater 13. For this reason, even if the tsunami and high waves occur and the breakwater 13 is submerged and the stored liquid 11 leaks from the tank 12, the leaked stored liquid 11 can be reliably retained inside the fence body 5.

And the plurality of annular lower cables 3, 3... That lock the fence body 5 are inserted into the steel pipe piles 2, 2. Even when the water level is lowered, the fence body 5 can be prevented from largely moving in the horizontal direction.
In the present embodiment, as shown in FIG. 4, even if one end 5a side to which the floating body 4 of the fence body 5 is connected moves in the horizontal direction, the other end 5b side of the fence body 5 is one end. Since the movement in the horizontal direction is almost restrained by being locked to the lower cables 3, 3... In a state adjacent to the lower cables 3, 3. Can be prevented from moving to.
For this reason, even when the level of water inundation caused by a tsunami or a high wave is lowered, the leaked stored liquid 11 can be reliably retained inside the fence body 5 in the vicinity of the steel pipe piles 2, 2.

(Second Embodiment)
Next, the second embodiment will be described with reference to the accompanying drawings. However, the same or similar members and parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. A different configuration will be described.

As shown in FIGS. 5 and 6, in the floating fence 21 according to the second embodiment, the steel pipe piles 22, 22... Are arranged on the upper side of the upper end portion 12 a of the tank 12. Built higher than 12 heights. Further, the distance d1 between the adjacent steel pipe piles 22 and 22 is set to be smaller than the diameter R of the tank 12.
In place of the lower cables 3, 3... According to the first embodiment, wires (moving bodies) in which one end 23a is connected to the steel pipe piles 22, 22,. .. Are provided.

  The other ends 23b of the wires 23, 23... Are movable in the vertical direction and the horizontal direction about the one end 23a, and the fence body 25 is locked to the other end 23b. ing. The lengths of the wires 23, 23... Are larger than the height of the liquid barrier 13, and the other end 23b is liquid-proof with the one end 23a as an axis. It is configured to be movable upward from the height of the bank 13. The wires 23, 23... May be formed in a straight line having no flexibility, or may be formed in a string having flexibility.

  The fence body 25 is composed of the same thing as the fence body 5 of the first embodiment, and the other end 25b opposite to the one end 25a to which the floating body 24 is connected is connected to the wires 23, 23. It is locked. And the fence main body 5 is arrange | positioned inside the some steel pipe piles 22,22 ....

  The floating body 24 is formed of the same material as that of the first embodiment, and is not divided into a plurality of pieces as in the first embodiment, and is formed integrally. And the floating body 24 is moored by the steel pipe piles 22, 22 ... via the some mooring lines 26, 26 .... The mooring lines 26, 26... Have one end 26 a connected to the floating body 24 and the other end 26 b connected to the steel pipe pile 22 at substantially the same height as the ground G plane.

  And in the floating type fence 21 by 2nd Embodiment, when the tsunami and the high wave of the height which were assumed arise and the breakwater 13 is submerged, the fence main body 25 latched by the wires 23 and 23 ... will be connected. The buoyancy of the floating body 4 is set so that the floated body 4 can float on the water surface 14, and the lengths of the wires 23, 23... And the mooring lines 26, 26.

  In the floating fence 21 according to the second embodiment, the plurality of wires 23, 23... That lock the fence body 25 can move the other end 23 b to the upper side of the liquid barrier 13, thereby causing a tsunami. Even when a high wave is generated and the breakwater 13 is submerged, the fence body 25 can be expanded around the tank 12 in the vicinity of the water surface 14 above the breakwater 13. Further, the plurality of wires 23, 23... That lock the fence body 25 are restrained from moving in the horizontal direction longer than the length of the wires 23, 23. It can be set as the structure which is not spaced apart more than the length of wire 23,23 .... By these things, the floating fence 21 by 2nd Embodiment has an effect similar to 1st Embodiment.

Further, the wires 23, 23... Are fixed to a steel pipe pile 22 provided on the inner side of the liquid breakwater 13 at one end 23a at substantially the same height as the ground G surface, as shown in FIG. In addition, when the level of water inundation due to a tsunami or high wave decreases, the other end 23b does not move to the outside of the breakwater 13, so that the fence body 25 moves to the outside of the breakwater 13. Can be prevented.
Moreover, in 2nd Embodiment, the steel pipe piles 22,22 ... are built higher than the height of the tank 12, and the space | interval d1 of the adjacent steel pipe piles 22,22 is set so that it may become smaller than the diameter R of the tank 12. FIG. Therefore, even if the tank 12 floats when the levee 13 is submerged due to a tsunami or a high wave, the tank 12 can be prevented from drifting outside the arranged steel pipe piles 22, 22. . In addition, these steel pipe piles 22, 22... Can reduce the amount of drifting objects caused by tsunami and high waves from colliding with the tank 12.

As mentioned above, although embodiment of the floating type fence by this invention was described, this invention is not limited to said embodiment, It can change suitably in the range which does not deviate from the meaning.
For example, in the above embodiment, the tank 12 is formed in a columnar shape and the liquid breakwater 13 is formed in a square tube shape, but the shape of the tank 12 and the liquid breakwater 13 may be appropriately set. Moreover, the height of the steel pipe piles 2 and 22 may be set as appropriate.
Moreover, in said 2nd Embodiment, although the space | interval d1 of the adjacent steel pipe piles 22 and 22 is set so that it may become smaller than the diameter R of the tank 12, it may become larger than the diameter R of the tank 12. It may be set. Also in the first embodiment, the interval between adjacent steel pipe piles 2 may be set to be smaller than the diameter of the tank 12 or may be set to be larger than the diameter of the tank 12. .
Moreover, in said embodiment, although the steel pipe piles 2 and 22 are employ | adopted as a pile body, it replaces with the steel pipe piles 2 and 22 and a concrete pile etc. may be employ | adopted.

Further, the floating body is divided into a plurality of parts in the first embodiment, and is integrally formed in the second embodiment, but is formed integrally in the first embodiment, and divided into a plurality of parts in the second embodiment. May be.
Moreover, in 1st Embodiment, although the fence main body 5 is arrange | positioned between the steel pipe piles 2, 2, ... and the breakwater 13, it is arrange | positioned inside the arranged steel pipe piles 2, 2, ... Also good.

1,21 Floating fence 2,22 Steel pipe pile (pile)
2a, 22a Upper end 3 Lower cable (moving body)
4,24 Floating body 5,25 Fence body 6 Upper cable 7 Connection wire 11 Storage liquid 12 Tank 12a Upper end 13 Liquid breakwater 13a Upper end 14 Water surface 23 Wire (moving body)
26 Mooring line d1 Interval G Ground R Diameter

Claims (2)

A plurality of piles arranged at intervals inside a breakwater built around a tank for storing a liquid having a specific gravity lower than that of water;
A plurality of movable bodies each of which is supported by at least a part of the plurality of pile bodies so as to be movable in the vertical direction and is restrained from moving in a horizontal direction over a predetermined range;
A floating body that can float on the surface of the water,
A fence body that is connected to the floating body and is suspended from the floating body when the floating body floats and is deployed in a cylindrical shape around the tank;
Each of the plurality of pile bodies is disposed above the upper end of the liquid barrier,
Each of the plurality of moving bodies is formed in an annular shape and is movable over the entire length of the pile body in a state where the pile body is inserted therein, and at least a part of each is above the liquid barrier Configured to be movable to
The fence main body is locked to the plurality of moving bodies . The floating fence according to claim 1 , wherein an interval between the adjacent pile bodies is set smaller than a diameter of the tank.

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