JP2021046109A - Water fence and building method for water fence - Google Patents

Abstract

To provide means capable of building a water fence at low cost in a comparatively small conservation region.SOLUTION: A water fence A includes: a protection wall 10 composed of a plurality of buoyancy bodies 11 lined up with the vertical direction as the longer direction; a restraining material 20 capable of introducing tension force in the periphery direction of the protection wall 10 while coupling the plurality of buoyancy bodies 11 in a mode with free expansion and assembling; and a positioning material 30 for forming a holding space C to keep a conservation subject B inside the protection wall 20. The water fence A is capable of being post-installed even when the conservation subject is an object continuing vertically with water surface in between as in an anchor Y by assembling the plurality of buoyancy bodies 11 on water. In addition, a strong protection wall 10 is capable of being built by introducing tension force in the periphery direction of the protection wall 10 by the restraining material 20.SELECTED DRAWING: Figure 1

Description

The present invention relates to a water fence installed so as to surround a conservation object on the water in a plan view.

Booms and the following patents are used to protect structures, objects, oil spills, etc. on the water by installing a wall in the water so as to surround the maintenance target in a plane. Fences and the like according to Document 1 are known.

Japanese Unexamined Patent Publication No. 2007-223577

The fence described in Patent Document 1 has at least one of the problems described below.
(1) It is assumed that it will be installed over a relatively wide area such as harbor closure, submersible protection fence, waterline protection, etc., and it is not assumed to be applied to the case where the maintenance area is a relatively narrow closed space.
(2) Since the floating body, the pillar, and the wall (net or membrane) are each composed of separate members, there is a limit in reducing the construction cost and improving the efficiency of the construction work.
(3) Unless an anchor or the like to be installed on the bottom of the water is provided, the fence may float on the water and cause misalignment or deformation with the object to be maintained.

Therefore, one of the objects of the present invention is to provide a means capable of constructing a water fence at low cost in a relatively narrow conservation area.

The first invention of the present application, which has been made to solve the above problems, is a water fence that can be installed so as to surround a conservation object on the water in a plan view to form a conservation area, and the vertical direction is the longitudinal direction. A protective wall in which a plurality of buoyant bodies are arranged side by side, a restraining material capable of introducing a tension force in the circumferential direction of the protective wall, and a holding space for retaining the maintenance object are formed inside the protective wall. , A positioning material, and at least.
Further, in the second invention of the present application, in the first invention, the positioning material is composed of at least three or more long materials, and the long materials intersect with each other in a plan view inside the protective wall. As such, it is attached to the protective wall or the restraining material, and the space surrounded by the long material is used as the holding space.
Further, in the third invention of the present application, in the first invention, the positioning material is provided with a gate that can be opened and closed in the plane direction, and the buoyancy body that extends from the ring material in the radial direction in a plan view. Alternatively, it is composed of a cross member that can be attached to the restraint member, and the inside of the ring member is used as the holding space.
Further, the fourth invention of the present application is characterized in that, in any one of the first to third inventions, a skirt which is connected to the lower part of the protective wall and developed in water is further provided. To do.
Further, the fifth invention of the present application is the method for constructing a water fence according to the second invention, wherein the object to be maintained is an object existing above and below the water surface, and the inside of the protective wall before construction. In the holding space formed by constructing the protective wall and attaching the three or more long members so as to have different longitudinal directions inside the protective wall. It is characterized by retaining the objects to be preserved.
Further, the sixth invention of the present application is characterized in that, in the fifth invention, the object to be maintained is an anchor of an anchored ship.
Further, in the seventh invention of the present application, in the fifth or sixth invention, a long material excluding at least one of the three or more long materials is attached to the protective wall in advance to protect the material. After introducing the maintenance object inside the wall, the remaining long material is attached to form the holding space.

According to the present invention, it has at least one of the effects described below.
(1) Since the buoyant body also serves as a floating body, a column, and a wall, it contributes to reduction of construction cost and time reduction of construction work at the site.
(2) The area of the maintenance area can be easily adjusted only by adjusting the number of connected buoyant bodies, and it is also excellent in application in a relatively narrow case.
(3) By configuring the buoyant bodies at both ends of the plurality of buoyant bodies to be connectable, it is also excellent in application in the field where the maintenance area is a closed space.
(4) Even if the object to be protected is an object (eg, an anchor anchored from a ship) that already exists above and below the water surface, a water fence can be installed later.
(5) By retaining the maintenance target in the holding space formed by the positioning material, the protective wall can be maintained at a predetermined position with respect to the maintenance target. As a result, it is not necessary to separately prepare an anchor or the like for holding the position of the protective wall.
(6) A long material excluding at least one of three or more long materials is attached to the protective wall in advance, and the remaining long material is used as a water fence by introducing a maintenance target into the holding space. It is possible to reduce the work of installing long materials at the installation site.

The schematic diagram which shows the whole structure of the water fence which concerns on this invention. The schematic diagram which shows the shape example of a buoyancy body. Schematic diagram showing the arrangement of restraint materials. The schematic which shows the other example of the positioning material. The schematic which shows the procedure of the construction method of a water fence. The schematic diagram which shows the other structural example of a positioning material. The schematic which shows the structure which added the skirt.

Hereinafter, examples of the present invention will be described with reference to the drawings.

<1> Overall configuration (Fig. 1)
The water fence A according to the present invention is a structure for forming a maintenance area B by installing the water fence A so as to surround the maintenance target on the water in a plan view.
In the present invention, the "maintenance object" includes anything that is required to be protected by surrounding objects and persons.
Further, in the present invention, the "maintenance area B" includes an area formed by partitioning the periphery of the maintenance object within a range in which the maintenance of the maintenance object is ensured.
In this embodiment, the maintenance target is assumed to be the anchor Y of the ship X that has already been anchored, and the maintenance area B is entangled with the anchor Y and an object such as a drifting object that may block the storage of the anchor Y. It is assumed that the area around the anchor Y is divided into a certain range so that an animal or the like that attempts to invade the ship X via the anchor Y does not approach the anchor Y.
The water fence A according to the present invention includes at least a protective wall 10, a restraining member 20, and a positioning member 30.
The details of each element will be described below.

<2> Protective wall (Fig. 1)
The protective wall 10 is a structure that is exposed on water to form a wall so as to partition a maintenance area B formed around the maintenance target.
The height and depth of the protective wall 10 can be appropriately determined depending on the type of maintenance target and the assumed factors (objects or persons) that may affect the maintenance target.
For example, when it is desired to prevent a person from entering the maintenance area B, the height of the protective wall 10 from the water may be set to 2 m or more.

<2.1> Buoyant body (Fig. 1)
In this embodiment, the protective wall 10 is formed by arranging a plurality of long buoyant bodies 11 having a longitudinal direction in the vertical direction side by side.
The buoyant body 11 can be connected to each other by using a restraining member 20 described later, a connecting tool separately provided on the buoyant body 11, or the like.
Further, the buoyancy body 11 can be constructed by using a material having a low specific gravity such as Styrofoam.
Further, on the surface of the buoyant body 11, for protection of polyurea and the like so that the buoyant body 11 is not damaged due to the influence of an external factor or the ship X side is not damaged by contact with the surrounding ship X or the like. A paint may be applied and coated.

<2.2> Example of shape of buoyant body (Fig. 2)
In the present invention, the shape of the buoyant body 11 is not particularly limited.
FIG. 2 shows an example of the shape of the buoyancy body 11.
The buoyant body 11 shown in FIG. 2A has a semi-cylindrical shape obtained by cutting a cylinder substantially at the center.
The buoyant body 11 shown in FIG. 2B has a substantially flat plate shape by removing both side surfaces of the cylinder while leaving the bottom of the cylinder in a circular shape.
The buoyant body 11 shown in FIG. 2C has a triangular shape when viewed from the side, and has a shape in which a slope 111 is formed on the outside.
The buoyant body 11 shown in FIG. 2D has a shape cut so as to form an inverted slope 112 on the outside while leaving the bottom portion of the quadrangular prism. Providing the reverse slope 112 as in this example is effective when the protective wall 10 is intended to prevent a person from invading the maintenance area B.

<2.3> Combined use as an oil fence Further, in the present invention, a material or the like capable of absorbing oil may be wrapped around the outer surface of the buoyancy body 11 (not shown).
According to this configuration, the water fence A according to the present invention can also be used as an oil fence.

<3> Restraint material (Figs. 1 and 3)
The restraining material 20 is a member for improving the holding property of the planar shape of the protective wall 10 by restraining a plurality of connected buoyant bodies 11.
As the restraining material 20, a long member such as a string or a band can be used.
FIG. 3 shows a configuration example of the restraint material 20.
In FIG. 3A, the restraint member 20 is composed of a belt member that is inserted into a loop 12 provided on the outer surface of each buoyancy body 11, and the protective wall is adjusted by tensioning the belt member to adjust the length. Tension force is introduced in the circumferential direction of 10. Each buoyant body 11 is attracted to the central side of the maintenance area by this tension force, and the planar shape of the protective body is restrained so as to maintain a substantially circular shape.
In FIG. 3B, the restraint member 20 is composed of a belt member that is inserted into a through hole 13 that is formed through the buoyancy body 11 in the side surface direction. The point that the planar shape of the protective body is maintained by the tension force using the belt member is the same as in FIG. 3A described above.

Further, if an elastic portion is provided in a part of the restraining material 20, when a tension force is introduced in the circumferential direction of the protective wall 10 by the restraining material 20, the restoring force of the elastic portion is used to utilize the protective wall. It is also possible to further improve the retention of the planar shape of 10.

<4> Positioning material (Figs. 1 and 4)
The positioning member 30 is a member for keeping the maintenance target in a predetermined position in the maintenance area B.
The positioning material 30 may have a structure that can be erected in the maintenance area B surrounded by the protective wall 10, and a bar material, a string material, a band material, or the like can be used.
A configuration example and a usage method of the restraining material 20 will be described with reference to FIGS. 1 and 4.

<4.1> Positioning example 1 (Fig. 1) (Formation of holding space with long material)
In FIG. 1, the positioning member 30 is composed of three long members 31 attached between the buoyant bodies 11 or the restraining members 20 so as to intersect each other in a plan view inside the protective wall 10. ..
By attaching each long member 31 so that the maintenance target (corresponding to the anchor Y in FIG. 1) is located in the substantially triangular space surrounded by the long member 31, the maintenance target is abbreviated as the maintenance area B. Can be retained in a central position.

<4.2> Positioning example 2 (Fig. 4) (Formation of holding space by ring material)
In FIG. 4, the ring member 32 provided with the gate 321 that can be opened and closed in the plane direction and the cross member 33 that extends from the ring member 32 in the radial direction in the plan view and can be attached to the buoyancy body 11 or the restraint member 20 are positioned. It constitutes a material 30.
The length of the cross member 33 is adjusted so that the ring material 32 is located substantially in the center of the maintenance area B, the gate 321 of the ring material 32 is opened, and the maintenance target is introduced into the ring material 32. Is a holding space C to be retained at a position substantially in the center of the maintenance area B.

<5> Example of construction method procedure (Fig. 5)
Next, an example of the method for constructing the water fence A according to the present invention will be described with reference to FIG.
In addition, each work described later can be appropriately changed in order or carried out in parallel within a consistent range.

<5.1> Seaplane fence towing (Fig. 5 (a))
First, the surface fence A is transported or towed on board by a small work ship Z or the like on which the worker Z1 is aboard from the ship X to the anchoring point Y1 of the anchor Y, which is the object of maintenance.
At this time, the water fence A may be transported or towed with the buoyancy body 11 deployed, or may be towed with the buoyancy body 11 temporarily assembled.
In the latter case, after arriving at a predetermined position, a part of the connection of the buoyant bodies 11 constituting the protective wall 10 may be disengaged, and then the construction work of the maintenance area described later may proceed.

<5.2> Construction of a conservation area with a protective wall (Fig. 5 (b))
After arriving at the predetermined position, the worker Z1 assembles the buoyancy body 11 so as to surround the anchoring point Y1 to construct the protective wall 10 for partitioning the maintenance area B. At this time, the restraining material 20 may be lightly tensioned to adjust the shape of the protective wall 10.

<5.3> Positioning work for maintenance target (Fig. 5 (c))
The long member 31 is inserted through the gap between the adjacent buoyant bodies 11, and the tip of the inserted long member 31 is exposed in the gap between the buoyant bodies 11 on the opposite side of the insertion destination of the long member 31. It is moored to the restraining material 20.
The insertion work of the long member 31 is performed at least three times from different directions so that the maintenance target (anchoring point Y1) is retained in the space surrounded by each long member 31.

<5.4> Final shape adjustment (not shown)
Finally, the lengths of the restraint material 20 and the long material 31 are adjusted, the shape of the protective wall 10 is adjusted so that the anchoring point Y1 is located substantially in the center of the protective wall 10, and the construction of the water fence A is completed. To do.

<6> Function / Action As described above, according to the water fence A according to the present invention, the buoyant body 11 also functions as a wall material for preventing invasion into the vicinity of the object to be maintained, so that the buoyancy body 11 can be easily and inexpensively protected in a predetermined place. The wall 10 can be constructed. Further, even when the object to be maintained is an object that is continuous up and down with the water surface in between, such as the anchor Y anchored from the ship X, the water fence A can be retrofitted around the object.

[Structure with a part of long material attached in advance]
A second embodiment of the present invention will be described with reference to FIG.
In the water fence A according to the present invention, with respect to the three or more long members 31 constituting the positioning member 30, the long members 31 excluding at least one are attached to the protective wall 10 in advance in an adjustable length manner. You may keep it.
In this case, as shown in FIG. 6A, the maintenance target is introduced in a state where the length of the pre-attached long member 31a is loosened and the closed holding space C is not formed, and then FIG. As shown in b), the remaining long member 31b may be attached to close the holding space C, and the lengths of all the long members 31a and 31b may be readjusted to construct the protective wall 10.

[Add skirt]
A third embodiment of the present invention will be described with reference to FIG. 7.
The water fence A according to the present invention may further include a skirt 40 that is connected to the lower part of the protective wall 10 and is deployed in water.
For example, in FIG. 7, the lower end of the buoyancy body 11 and the upper edge of the skirt are separately connected, and a weight 41 is newly suspended on the lower edge of the skirt 40 so that the skirt 40 is provided in the depth direction of the water. It is configured to be reliably deployed.
By providing the skirt 40, it is possible to prevent drifting objects floating in the water and invasion of divers and the like into the conservation area B.
Further, the water fence A provided with the skirt 40 can also function as a pollution prevention film for preventing the diffusion of pollution.

A Water fence B Maintenance area C Holding space X Ship Y Anchor Y1 Anchor point Z Work ship Z1 Worker 10 Protective wall 11 Buoyancy body 111 Slope 112 Reverse slope 12 Loop 13 Through hole 20 Restraint material 30 Positioning material 31 Long material 32 Ring Material 321 Gate 33 Cross member 40 Skirt 41 Weight

The first invention of the present application, which has been made to solve the above problems, is a water fence that can be installed so as to surround a conservation object on the water in a plan view to form a conservation area, and the vertical direction is the longitudinal direction. A protective wall in which a plurality of buoyant bodies are arranged side by side, a restraining material capable of introducing a tension force in the circumferential direction of the protective wall, and a holding space for retaining the maintenance object are formed inside the protective wall. , comprising a positioning member, at least, the positioning member is composed of at least three or more elongated members, each elongated member so as to intersect each other in plan view inside the protective wall, wherein It is characterized in that a space attached to a protective wall or the restraining material and surrounded by the long material is used as the holding space.
Further, the second invention of the present application is a water fence that can be installed so as to surround the conservation object on the water in a plan view to form a conservation area, and a plurality of buoyant bodies having a longitudinal direction in the vertical direction are arranged side by side. A protective wall, a restraining material capable of introducing a tension force in the circumferential direction of the protective wall, and a positioning material forming a holding space for holding the maintenance object inside the protective wall. at least comprising, prior Symbol positioning material is provided an openable gate in the planar direction, and the ring member, attachable to the buoyant body or the restraint member and extends in plan view radially from the ring member, the lateral It is characterized in that it is composed of a material and the inside of the ring material is used as the holding space.
Further, the third invention of the present application is characterized in that, in the first or second invention , a skirt which is connected to the lower part of the protective wall and is developed in water is further provided.
Further, the fourth invention of the present application is the method for constructing a water fence according to the first invention, wherein the object to be maintained is an object existing above and below the water surface, and the inside of the protective wall before construction. In the holding space formed by constructing the protective wall and attaching the three or more long members so as to have different longitudinal directions inside the protective wall. It is characterized by retaining the objects to be preserved.
Further, the fifth invention of the present application is characterized in that, in the fourth invention, the object to be maintained is an anchor of an anchored ship.
Further, in the sixth invention of the present application, in the fourth invention or the fifth invention, a long material excluding at least one of the three or more long materials is attached to the protective wall in advance to protect the material. After introducing the maintenance object inside the wall, the remaining long material is attached to form the holding space.

Claims (7)

It is a water fence that can be installed so as to surround the conservation target on the water in a plan view to form a conservation area.
A protective wall consisting of multiple buoyant bodies whose longitudinal direction is the vertical direction,
A restraining material that can introduce tension in the circumferential direction of the protective wall,
A positioning material that forms a holding space for retaining the maintenance object inside the protective wall, and
It is characterized by having at least
Water fence. The positioning material is composed of at least three long materials.
Each of the long members is attached to the protective wall or the restraining material so as to intersect each other in a plan view inside the protective wall.
The space surrounded by the long material is used as the holding space.
The water fence according to claim 1. The positioning material
A ring material with a gate that can be opened and closed in the plane direction,
It is composed of a cross member that extends from the ring material in the radial direction in a plan view and can be attached to the buoyant body or the restraining material.
The inside of the ring material is used as the holding space.
The water fence according to claim 1. It is further provided with a skirt that is connected to the lower part of the protective wall and deployed in water.
The water fence according to any one of claims 1 to 3. The method for constructing a water fence according to claim 2.
The object to be maintained is an object that is continuous up and down across the water surface.
After introducing the maintenance target inside the protective wall before construction, the protective wall is constructed.
It is characterized in that the maintenance object is retained in the holding space formed by attaching the three or more long members so as to have different longitudinal directions inside the protective wall.
How to build a water fence. The object of maintenance is an anchor of an anchored ship.
The method for constructing a water fence according to claim 5. A long material excluding at least one of the three or more long materials is attached to the protective wall in advance.
After introducing the maintenance object inside the protective wall, the remaining long material is attached to form the holding space.
The method for constructing a water fence according to claim 5 or 6.

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