JPH047227Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is based on the use of a pollution diffusion prevention membrane that is suspended below the sea surface to prevent the spread of polluted water generated during marine civil engineering construction. It relates to a structure that prevents adhesion.

[Conventional technology]

When carrying out marine civil engineering works, in order to prevent polluted water generated during construction from dispersing into the ocean, a pollution diffusion prevention membrane as shown in Figure 4, for example, is installed.
A' is suspended below the sea level as shown in Figure 5. That is, by floating the float B' attached to the upper end of the pollution diffusion prevention membrane A' on the sea surface C', the pollution diffusion prevention membrane A' is suspended below the sea surface like a curtain, thereby surrounding the area under construction. It is separated from other areas to prevent the spread of contaminated water. The large pollution diffusion prevention membrane A' is made by connecting a canvas a' of a predetermined size vertically and horizontally with a reinforcing belt 1' and a rope 2, and a ballast D' is attached to the lower end in the width direction. The attached pollution diffusion prevention membrane A' is stretched taut under the sea surface to prevent it from rolling, and wire ropes are attached to prevent it from floating.
Main anchor with auxiliary float F′ due to E′
It is fixed at G′.

[The problem that the idea attempts to solve]

This pollution diffusion prevention membrane A' is installed under the sea surface during the construction period, so after several months, a large amount of marine life has adhered to the membrane surface, and the current situation is that it is difficult to dispose of it. be. Pollution diffusion prevention membrane
Since A′ is quite expensive, it is not possible to immediately throw it away just because it has marine organisms attached to it, so after the construction is completed, it is taken ashore and work is done to remove the attached material on the spot. After lifting, the deposits rot and emit a foul odor.

In order to eliminate this drawback, we developed a pollution diffusion prevention film.
There are some in which a net or other shielding membrane is provided on both sides of A' (for example, see Japanese Patent Publication No. 54-23182). However, in the conventional case, the weight of the membrane prevents the float from suspending the pollution diffusion prevention membrane A'.
There is a drawback that directly multiplies B′. If the weight of the membrane is applied directly to the float B', marine organisms may adhere to the membrane that covers both sides of the membrane A' if it is placed below the sea surface for a long period of time. When this becomes heavy, float B' alone cannot support the pollution diffusion prevention film A' and the desalination film to which marine organisms have adhered, and float B' sinks below the sea surface, which is the original purpose of preventing pollution diffusion. becomes unable to perform its functions.

The present invention aims to eliminate this drawback.

[Means to solve the problem]

In order to achieve this purpose, the present invention uses a float 4 separate from the float B attached to the upper end of the membrane A to suspend the pollution diffusion prevention membrane A below the sea surface.
The net body 3 arranged on both sides of the pollution diffusion prevention membrane A,
Attach to 3.

[Effect]

As shown in Fig. 3, the pollution diffusion prevention membrane A equipped with the structure for preventing the adhesion of marine organisms according to the present invention is floated on the sea surface C by floating the float B attached to the upper end of the membrane A, as shown in Fig. 3. At this time, the nets 3, 3 disposed on both sides of the pollution diffusion prevention membrane A are supported by a float 4 different from the float B. Therefore, net body 3
The weight will not be applied directly to the float B for suspending the pollution diffusion prevention membrane A below the sea surface. In addition, since both sides of the pollution diffusion prevention membrane A are covered with the net members 3, if this is installed under the sea surface for a long time, the nets 3, 3 covering both sides of the pollution diffusion prevention membrane A will be It is rare for marine organisms to attach directly to the pollution diffusion prevention film A.

〔Example〕

Embodiments of the present invention will be described based on the accompanying drawings.

As in the conventional case, a plurality of floats B are attached to the upper end of the pollution diffusion prevention membrane A shown in the example (Fig. 1), and these are floated on the sea surface C as shown in Fig. 3. As in the conventional case, the pollution diffusion prevention membrane A is suspended below the sea surface like a curtain, thereby enclosing the area under construction and separating it from other areas to prevent the spread of polluted water. . In addition, the large version of the pollution diffusion prevention membrane A is made by connecting a canvas a of a predetermined size vertically and horizontally with a reinforcing belt 1 and a rope 2, and a ballast D is attached to the lower end in the width direction. The large pollution diffusion prevention membrane A is stretched tightly under the sea surface to prevent it from rolling, and is also fixed to the main anchor G by a wire rope E to prevent it from floating, as in the conventional case. .
The canvas a is preferably made of a water permeable material such as polyester fiber. In addition, the float for suspending the pollution diffusion prevention membrane A below the sea surface is shown as a split type as shown by B and B' in the drawing, but it may be of a different type depending on the installation environment. For example, a plurality of spherical floats may be connected by a spindle wire, and a float canvas may be wrapped around the floats.

By the way, on both sides of the pollution diffusion prevention membrane A, there are provided nets indicated by 3 in FIGS. 1 to 3.
In addition, in FIG. 1, for convenience, the net body 3 is drawn only in about the upper 1/3 of the pollution diffusion prevention film A, and the illustration of the other parts is omitted. It is preferable to attach the net 3 to the large-sized pollution diffusion prevention membrane A in a manner that it does not come into close contact with it, and although not shown, it can be fixed to the pollution diffusion prevention membrane A by, for example, a rope. In this way, when the net 3 is arranged on both sides of the pollution diffusion prevention membrane A, when the pollution diffusion prevention membrane A is installed under the sea surface for a long period of time, the net 3 covering both sides of the membrane 3, Marine organisms attach to the membrane 3, and it is almost impossible for them to attach directly to the pollution diffusion prevention membrane A. Furthermore, it becomes possible to dispose of marine organisms that have conventionally adhered to the pollution diffusion prevention membrane A by simply taking out the nets 3, 3 to which marine organisms have adhered. This means that the current situation, which has traditionally been difficult to deal with, can be solved all at once using an extremely simple method.

The mesh body 3 is preferably knitted with fibers made of synthetic resin such as polyester, and impregnated with an antifouling agent obtained by using a highly safe antibacterial agent, antifungal agent, copper powder, etc. in combination. . In this way, when the pollution diffusion prevention membrane A having the net bodies 3, 3 is installed below the sea surface, this antifouling agent will be eluted into the seawater in the vicinity, and the pollution diffusion prevention membrane A and the net body 3 will be eluted into the seawater in the vicinity. It will be protected. Therefore, while this antifouling agent is eluted into the seawater (usually for 6 to 8 months), no marine organisms will adhere to it, depending on the installation area, seawater temperature, and other conditions.

A float 4 separate from the float B for suspending the pollution diffusion prevention membrane A below the sea surface is attached to the net body 3. In this way, the net 3 is supported by the float 4, and the weight of the net 3 is transferred to the pollution diffusion prevention film A.
It does not hang directly on the float B for suspending it below the sea surface. Therefore, if this pollution diffusion prevention membrane A is installed under the sea surface for a long period of time, even if marine life attaches to the nets 3, 3 covering both sides of the membrane and becomes heavy, it will not affect the float B. does not affect The net 3 may be a large one, but in the embodiment, nets of a predetermined size are connected vertically and horizontally, and a float 4 is attached to each net. In this case, the lower end of the upper net 3 is inserted between the pollution diffusion prevention membrane A and the float 4 along the outside thereof, as shown in FIG. It is preferable to insert the upper end edge between the pollution diffusion prevention membrane A and the float 4, and to securely bind them to each other with a rope or the like. In this case, since the float 4 is present between the net body 3 and the pollution diffusion prevention film A, the net body 3 and the pollution diffusion prevention film A
An appropriate gap is naturally formed between the two, and the significance of providing the net 3, that is, the function of preventing marine organisms from adhering to the pollution diffusion prevention membrane A, increases.

[Effect of idea]

According to the present invention, when the pollution diffusion prevention membrane A is installed under the sea surface for a long period of time, even if marine life attaches to the nets 3, 3 covering both sides of the membrane and becomes heavy, the pollution diffusion prevention membrane A It has the effect of not affecting float B for suspending it below the sea surface.
The original function of preventing pollution diffusion can be maintained for a long time.

[Brief explanation of drawings]

Figures 1 to 3 of the accompanying drawings show an embodiment of the present invention; Figure 1 is a front view thereof, and Figure 2 is a front view thereof.
The figure is an enlarged side view of a part thereof, FIG. 3 is a schematic diagram showing the installed state, FIG. 4 is a front view showing an example of the conventional example, and FIG. 5 is a schematic diagram showing the installed state. figure,
It is. A... Pollution diffusion prevention membrane, B... Float, 3...
... Net body, 4... Float.

Claims (1)

[Scope of utility model registration request] By floating the float B attached to the upper end of the pollution diffusion prevention membrane A on the sea surface C, the pollution diffusion prevention membrane A is suspended below the sea surface, thereby blocking the diffusion of polluted water, and A marine pollution diffusion prevention membrane characterized in that nets 3, 3 are arranged on both sides of the pollution diffusion prevention membrane A, and a float 4 different from the float B is attached to the nets 3, 3. structure to prevent marine organisms from attaching.