JPH0971919A - Scour protection net - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fill up a large number of filling materials, such as small stones or crushed stones to be filled up in a protection net by enhancing the strength of a scour protection net. SOLUTION: The developing shape of a scour protection net which is designed to house scour protection filling materials 5, such as small stones and crushed stones, is octagonally formed. A suspension ring 4 is mounted on each apex of the octagon-shaped protection net 10. The filling material 5 is placed is the protection net 10. When the net is hangingly lowered with a crane, it is arranged to shorten the span between each apex of the ring 4 mounted and minimize the hanging down of the net 10, thereby enabling many filling materials to be filled up. Furthermore, since this construction makes it possible to scatter the load applied to one ring 4, it is possible to support many filling materials.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scour prevention net mainly used for revetment / water flow control of rivers, coasts and other sea areas, which is filled with scour prevention filler such as pebbles and crushed stones. Regarding

[0002]

[Prior Art] Revetment of rivers, coasts or other sea areas
A gabion is used for water flow control.

A gabion is a cylindrically knitted basket filled with stones, and a knitted wire formed into a cylindrical shape is widely used.

However, since the gabion made of wire is cylindrical and can be filled with stones only through the narrow opening at the end, work efficiency is poor, and since it is made of wire, it is heavy and inconvenient to handle. In addition, there was a problem in terms of durability because rust was generated.

One method for solving the problem is shown in FIG.
As shown in FIG. 0, synthetic resin fibers are formed into a quadrangular mesh body, and the mesh body is folded in two along a polygonal line parallel to the ear line 1 to form a folded body, and both ends of the folded body are folded. It is considered that a boat-shaped gabion is made by tying ropes together.

[0006] In this boat-shaped gabion, the opening 2 is provided between both ends connected by the rope, and a wide insertion opening is obtained, so that the workability of stone filling can be improved, and the synthetic resin is used. Since the weight is relatively light and easy to handle, and since it does not cause rust and is highly durable, it can solve the above-mentioned problems of the wire gabion, but the opening 2 is provided between both ends. Since the wide insertion opening is formed, there is a problem in that it takes time and labor to process the stones after closing the wide opening 2 and the working cost increases.

Therefore, as one of the alternatives to the gabion having such a problem, conventionally, a synthetic resin fiber as shown in FIG. 8 is formed in a square mesh body 3, and the mesh body 3 formed in the square shape. Rings 4 for hanging at each apex of
A scour prevention net fitted with is used.

In this product, a scour preventive filling material (hereinafter referred to as a filling material) 5 such as small stones or crushed stones is placed on the center portion of the expanded mesh body 3, and as shown in FIG. Ring 4
Is suspended by, for example, a hook 6 of a crane, and the suspended neck portion of the mesh body 3 is bound by a rope.

Therefore, the stone stuffing work can be done simply by placing stones on the central portion of the expanded mesh-like body 3, and the workability is good, and the weight is light and no rust is generated. Moreover, the blockage process after filling with stones can be easily performed because it can be performed simply by wrapping a rope around the thin neck part that is suspended by a crane and binding it.

However, in the case where the suspending rings 4 are provided at the respective apexes of the above-mentioned quadrangular reticulate body 3, when suspended by a crane, the space between the suspending rings 4 becomes large as shown in FIG. Since the filler 5 such as pebbles and crushed stones that hangs down and spills from that portion, many fillers 5 cannot be packed.

Therefore, there is a problem in that a large amount of the filler 5 is packed to increase the wave-dissipating force and the velocity of the flowing water, so that the revetment effect and the water flow control cannot be improved.

Therefore, when it is necessary to improve their performance, a large net is required, which causes a problem of cost increase.

Further, when suspended by a crane, the total load of the filler 5 is concentrated on the four end portions of the mesh body 3 to which the suspending ring 4 is attached, so that even a relatively small load is broken. However, there is a problem that it is difficult to pack a large amount of the filler 5 in terms of strength.

For this reason, the hanging ring 4 is also provided between the vertices of the end portions of the net-like body 3, so that the hanging part of the net-like body 3 is suspended by the hanging ring 4 between the vertices. It is conceivable to lift up and disperse the load applied to the ring 4 for suspending the apex.

[0015]

However, in the case where the above-mentioned hanging ring is provided between the apexes of the net, it is impossible to prevent the filler from spilling by lifting the hanging portion of the net. It is possible, but the distance to the hanging ring provided between the center of the net and the apex is more
Since it is shorter than the distance between the center of the net and the hanging ring provided at the apex (the length of the side of the rectangle and the length of the diagonal line), the load is concentrated on the hanging ring provided between the apices. Since the load cannot be distributed to all rings, strength cannot be increased. Therefore, there is a problem that a large amount of filler cannot be packed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a scour prevention net capable of preventing sagging of the net and improving strength and filling a large amount of filler.

[0017]

In order to solve the above-mentioned problems, in the invention according to claim 1, the developed shape of the net in which the scour prevention filler such as small stones and crushed stones is put is 2n (n ≧ 3).
It adopted a configuration in which a polygonal shape was used and a hanging ring was attached to each apex of the mesh formed in the 2n polygonal shape.

Further, at this time, in the invention according to claim 2, a plurality of engaging tools are arranged at equal intervals around the net in which the scour prevention filler such as pebbles and crushed stones is put, and the equal intervals are provided. The rope for suspension is attached along the circumference of the net through the engaging device arranged in Section 2.

[0019]

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

FIG. 1 shows a scour prevention net (hereinafter referred to as a prevention net) according to the invention of claim 1 as a first embodiment.

The prevention net 10 comprises a net main body 11, an edge rope 12 and a hanging ring 4.

In the case of this embodiment, the net body 11 has the stitch 3
It has a double structure with a 0 mm nylon Russell net, and its developed shape is 2n (n ≧ 3) with n = 4 and 8
It is formed in a rectangular shape.

A nylon edge rope 12 is inserted through the outermost stitches of the net body 11, and a hanging ring 4 is attached to the edge rope 12.

The suspending ring 4 is formed by connecting a short nylon rope to the edge rope 12 to form a ring shape, and is attached to each apex of the net body 11.

This embodiment is constructed as described above. Next, its usage and its operation will be described.

Since the prevention net 10 is made of nylon, it can be folded and stored without being bulky, and can be carried to the construction site in the folded state.

For this reason, it is easy to store and carry in, so it is suitable as an equipment for revetment and water flow control for emergencies when a disaster occurs.

At the site, the folded prevention net 10 is developed, and the developed prevention net 10 is filled with scour prevention filler 5 such as small stones or crushed stones.

At this time, the work of filling the filling material 5 can be efficiently performed by using the filling box 13 as shown in FIG.

That is, the box 13 has a quadrangular or circular frame, and is covered with the prevention net 10 as shown in FIG. 2, and the filler 5 is placed in the covered prevention net 10.
When it is charged, the frame of the box 13 supports the charged filler material 5 and prevents it from collapsing, so that the filler material 5 can be stacked simply by charging it into the net 10 in the box 13. That is. . Therefore, when this box 13 is used, the mesh 1 of the filler 5 is
The filling work to 0 can be done easily.

When the filling operation of the filling material 5 is completed in this manner, the hanging ring 4 around the prevention net 10 is lifted by the hook 6 of the crane or the like. At this time, the prevention net 10 hung by the hook 6 hangs down at the portion between the hanging rings 4 as shown in FIG. 3, but the amount of slack that hangs is similar to that of the prevention net 10. 8
Due to the square shape, the length from the central portion of the net 10 to each suspension ring 4 has the same size, and the developed shape having the same vertical and horizontal lengths as shown by the chain line in FIG. Compared with the quadrangular prevention net 10, the distance between the vertices to which the suspension ring 4 is attached becomes shorter, so that it can be made smaller. Therefore, the amount of slack is reduced and the filler 5
A large amount of filler 5 can be added to prevent spillage.

Further, at this time, the packing material 5 to which the prevention net 10 can be hung has a quadrangular expanded shape because the prevention net 10 has the suspension rings 4 provided at each vertex of the octagon. Since it is suspended by the ring 4 that is twice as large as that of the prevention net 10 in FIG. 1, it is possible to disperse the load applied to one ring 4 and support a larger amount of the filler 5.

On the other hand, as shown in FIG. 4, the prevention net 10 thus lifted by the crane may be arranged at the installation site by binding the narrowed neck portion with the binding rope 14.

As described above, in the prevention net 10, the development shape of the prevention net 10 is made into a 2n (n ≧ 3) polygon so that the prevention net 10 can be prevented from hanging down and its strength can be improved. Therefore, it is possible to provide a scour prevention net capable of being filled with a large amount of the filler 5.

Further, the filling work of the filling material 5 can be easily carried out, and moreover, the prevention net 10 after the filling work of the filling material 5 is carried out.
Since the work of closing the can be done easily, work efficiency is very good.

In this embodiment, the developed shape of the prevention net 10 is octagonal, but it is not limited to this, and any shape such as 6, 8, 10, 12, ... However, it goes without saying that the more the polygonal shape, the more the above-mentioned effects are improved.

Next, a scour prevention prevention net (hereinafter, prevention net) 10 'according to the invention of claim 2 will be described as a second embodiment.

As shown in FIG. 5, the prevention net 10 'has a net main body 11 into which a filler 5 such as small stones and crushed stones is put.
A plurality of engaging tools 15 are arranged at equal intervals around the circumference of the rope, and the rope 1 for suspension is placed through the engaging tools 15 arranged at equal intervals.
6 is attached along the periphery of the net body 11.

For example, in this embodiment, the same developed shape as that of the first embodiment is an octagon, and the edge rope 12 is surrounded.
A plurality of engaging members 15, for example, 32 shackles 15 are arranged at equal intervals around the net body 11 made of a nylon raschel preventing mesh provided with the net body via the shackles 15 arranged at equal intervals. A rope 16 for suspension is attached along the periphery of 11.

That is, the hanging rope 16 is attached to the edge rope 12 so as to freely move with the shackle 15.

This embodiment is configured as described above, and since the prevention net 10 'can be folded and not bulky as in the first embodiment, it can be easily stored or carried into a construction site. In addition, at the site, the folded prevention net 10 'is developed, and the filling material 5 such as pebbles and crushed stones is packed in the center of the expanded prevention net 10'. The filling operation of the filling material 5 at this time can also be efficiently performed by using the filling box 13 as shown in FIG.

When the filling operation of the filling material 5 is completed in this way, the hanging rope 1 around the prevention net 10 'is formed.
Lift 6 with a crane. At this time, as shown in FIG. 6, the shackle 15 and the suspending rope 16 between the shackles 15 are suspended by the hook 6, and the length of the suspending rope 16 is adjusted so that the tensions of the suspending rope 16 become equal. To do.

That is, if the length of the suspending rope 16 suspended by the hook 6 is adjusted and the tensions of the suspending rope 16 are made equal, the suspending rope 16 is adjusted.
Thus, the load can be evenly distributed to each shackle 15, so that the load can be prevented from deviating and a large amount of the filler can be supported.

As shown in FIG. 6, the shackle 15 and the portion of the shackle 15 of the suspended prevention net 10 'hang down. The slack amount of the shackle 15' is determined by arranging a plurality of shackles 15 at equal intervals. Can be made smaller. Therefore, it is possible to prevent the filler 5 from spilling from the slack portion, so that a large amount of filler can be added.

Further, as shown in FIG. 7, the prevention net 10 'hung up by the hook 6 may be formed by tying the thin neck portion with the tying rope 14 and arranging it at the installation place.

As described above, in this prevention net 10 ', a plurality of engaging members 15 are arranged at equal intervals around the net body 11,
By attaching the suspending ropes 16 along the periphery of the prevention net 10 'via the engaging tools 15 arranged at equal intervals, it is possible to prevent the prevention net 10' from hanging and to increase the strength. It is possible to provide a scour prevention prevention net that can be improved and can be filled with a large amount of the filler 5.

Further, the filling work of the filling material 5 can be easily carried out, and moreover, the prevention net 1 after the filling work of the filling material 5 is carried out.
The work of closing 0'is only required to be bound by the binding rope 14, so that it can be easily performed.

In this embodiment, the expanded shape is described as an octagon, but the invention is not limited to this, and the expanded shape may be a 2n (n ≧ 3) rectangular shape such as 6, 10 ... It goes without saying that it can be applied.

In the embodiment, the shackle is used as the engaging tool, but the engaging tool is not limited to this. For example, a ring made of a short rope or the like may be used for the engaging tool. The ring may be used to connect the edge rope and the hanging rope.

[0050]

As described above, the present invention provides a scour preventive net which is configured as described above and which prevents the preventive net from sagging and which can improve strength and can be filled with a large amount of filler. You can

Therefore, it is possible to enhance the water repellent effect and the water flow control by increasing the wave-dissipating force and the velocity of the flow.

Further, since the structure is simple, it can be manufactured at a low cost, and the stone filling work can be performed easily by expanding the prevention net, and the treatment after the stone filling can be performed only by binding the rope. Work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a plan view of a first embodiment.

FIG. 2 is an explanatory view of the operation of the first embodiment.

FIG. 3 is a diagram illustrating the operation of the first embodiment.

FIG. 4 is an operation explanatory view of the first embodiment.

FIG. 5 is a plan view of the second embodiment.

FIG. 6 is an operation explanatory view of the second embodiment.

FIG. 7 is an operation explanatory view of the second embodiment.

FIG. 8 is a plan view of a conventional example.

FIG. 9 is an operation explanatory view of a conventional example.

FIG. 10 is a perspective view of a conventional example.

[Explanation of symbols]

 4 ring 5 scour preventive filler 10, 10 'scour preventive net 11 net body 12 edge rope 15 engaging tool (shackle) 16 hanging rope

Claims (2)

[Claims] 1. A development net of a scour prevention filler such as pebbles, crushed stone, etc., has a polygonal shape of 2n (n ≧ 3), and a hanging ring is provided at each vertex of the mesh formed in the 2n prism. A scour prevention net characterized by being installed. 2. A plurality of engaging tools are arranged at equal intervals around the net filled with scour prevention fillers such as pebbles and crushed stones, and suspended through the engaging tools arranged at equal intervals. The scour prevention net according to claim 1, wherein a rope for use is attached along the periphery of the net.