JPH11222838A - Pollution preventive curtain - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid breakage of a curtain by fixing one side end of a pollution preventive curtain unit to a mooring buoy and connecting the other side end to the following buoy with an easily detachable connection member to release the curtain unit in a storm. SOLUTION: Curtains 9, 9. are integrally fitted to floats constituted of floating bodies 12, 12 and tensile members 13, 13 to constitute a pollution preventive curtain units 21, 21. One side end of the unit 21 is connected to a mooring buoy 22 through a connection member 23 and the other side end is connected to the following buoy 22 by an easily detachable connection member 24. In this way, the units 21 are continuously connected to spread the curtains in site one after another. The units are disconnected by releasing the connection member 24 in a storm to keep the unit 21 free like a streamer while holding it only at one side end. Hence, the unit 21 can be prevented from being damaged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pollution control membrane used in oceans and rivers.

[0002]

2. Description of the Related Art In marine civil engineering works and river works, in order to prevent the spread of pollution generated by landfills and dredging, the construction site is surrounded by a pollution prevention film or a pollution prevention film is installed downstream. A conventional example of such a pollution prevention film will be described below with reference to the drawings.

FIG. 7 is a front view, and FIG. 8 is an explanatory view of a locking portion. In the drawing, reference numeral 1 denotes a curtain portion for closing and setting up the contaminants constituting the membrane main body. And the weight 2 is attached to the lower part.
Numeral 3 designates a float for suspending the curtain 1 over its entire length.
Is mounted in a cover 5 sewn with a vinyl chloride resin or the like, and the curtain portion 1 is provided below the cover 5 via a tension member 6 made of a fiber belt of polyester or the like.
Are attached by sewing.

A unit is constituted by connecting the connecting members and the annular connecting members 7 and 8 for connecting the mooring cable to both ends of the tension member 6 with bolts. By fixing the ends of such units to mooring buoys and anchors, they are successively extended and installed at the site.

[0005]

However, with the recent increase in the scale of offshore civil engineering work and river construction, the construction period has been prolonged, and in the case of offshore civil engineering work, the construction area has shifted from the inland sea to the open ocean. It is more often done in a face-to-face location. Under these circumstances, the use of the anti-pollution film used for a long period of time has increased, and durability and strength problems have arisen due to strict installation conditions.

[0006] In particular, in long-term construction for several years, weather conditions exceeding design conditions due to a typhoon or the like occur during that time, and the pollution prevention film may be damaged. It is practically impossible to manufacture a pollution control film having the strength and durability capable of coping with such unexpected conditions in view of its production and cost. Therefore, in order to cope with such a situation, a method of floating and sinking is adopted in which the pollution prevention film is settled on the sea floor during stormy weather, and after the weather has settled down, it is pulled up and installed again.

However, when this floating / sinking method is adopted, in a large-scale construction, the number of use of the pollution control membrane becomes extremely large, and the apparatus becomes complicated. As a result, a great deal of labor and time are required for the installation work. There's a problem. In addition, settlement and extension management is required, and enormous construction costs are required. On the other hand, despite long-term use, stormy weather does not always occur during that period, and it is not easy to decide to adopt such a huge construction cost.

[0008]

SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a pollution control membrane unit integrally formed by attaching a curtain section to a float section, and one end of the unit is fixedly connected to a mooring buoy, and the other end is connected to a mooring buoy. The unit is connected to the mooring buoy by an easily attachable / detachable connecting member, and one side end of the next unit is fixedly connected to the mooring buoy, so that the units are successively extended to the site, such as a typhoon. In the case of urgent need, by cutting each connecting member, each anti-pollution membrane is moored on one side to the mooring buoy, and the other side end is moored in a free-flowing state in a free-end state, This makes it possible to cope with an external force exceeding the design of the pollution prevention film due to the deterioration of the weather or the like.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a front view of a main part, FIG. 2 is a front view of a unit, FIG. 3 is an enlarged vertical sectional view of a main part of the unit, FIG.
FIG. 5 is an explanatory view showing a connected state of the units, and FIG. 5 is an explanatory view showing a state in which one side of the unit is moored. In FIG. It is a curtain part to be watered, has a width of about 5 to 20 m, and has a weight 10 attached to a lower part.

Reference numeral 11 denotes a float, which has the following structure. Reference numeral 12 denotes an oval buoyant body made of a synthetic resin, metal, or the like having excellent wear resistance, and contains air therein. Reference numeral 13 denotes a tension member that also serves as a core material of the float portion 11, has a width similar to that of the curtain portion 9, has a width for mounting a plurality of the buoyant members 12, and embeds a reinforcing material such as a cloth, a wire mesh, and an iron plate. It is made of rubber.

Two fixtures 14 are attached in the longitudinal direction so that the elliptical buoyancy bodies 12 are arranged to face each other with the tension member 13 interposed therebetween, and such buoyancy bodies 12 are arranged at predetermined intervals in the width direction. Placed in The fixture for fixing the buoyant body 12 to the tension member 13 may have any structure.
For example, the above-described fixing device 14 is formed of a band-shaped body such as a metal or a synthetic resin, and has holding portions 15 and 16 which can be divided into halves by a diameter portion corresponding to the outer diameter of the buoyant body 12 and the tension member 13 The fixing portion 17 is disposed opposite to both sides of the tension member 13 and both ends are integrally fixed to the tension member 13 by fixing means 18 such as bolts and nuts. The buoyancy body 12 is held by the parts 15 and 16, and the holding parts 15 and 16 are integrated by the connecting means 19 such as a bolt and a nut to firmly hold the buoyancy body 12 to form the float part 11.

In the above description, the elliptical buoyancy body 12 is used.
Has been described to be fixed in the vertical direction, but may be fixed in the horizontal direction, or may be a spherical shape. Further, the fixation may be performed not by two fixing devices but by one wide fixing device. In addition, the buoyant body 1
Although 2 is described using a hollow body, it may be made of a material having a specific gravity lower than that of water such as foamed resin or wood.

The tension member 1 of the float portion 11 thus constructed
The unit 9 is formed as shown in FIG. 2 by attaching the curtain part 9 to the lower part of the unit 3 with a fastener 20 such as a bolt. In the present invention, the unit 21
Is not limited to the above-described structure, and may be any structure as long as the curtain portion 9 is attached to the float portion 11, regardless of the presence or absence of a tension member. The contents described below are the main points of the present invention.

One end of each unit 21 is connected to a buoy 22 at one point by a fixed connecting member 23, and the other end can be cut to a buoy 22 at one point using a blade such as a fiber rope. The connection is made by a connection member 24 which can be easily detached by a worker such as a connection member made of a suitable material or a hook. The unit 21 is successively connected to the buoy 22 by firmly connecting one end of the next unit 21 to the buoy 22.

In this unit, a plurality of two or three units may be fixedly connected to each other to form a set, and one end of the set is fixed to the buoy as described above. The other side end may be connected to the next one-point mooring buoy 22 by a connecting member 24 such as a fiber rope or the like, which can be easily cut and removed. In this case, as shown in FIG. 6, the connection between the units 21 is made by overlapping the ends of the tension members 13 and sandwiching them from both sides by connecting plates 25 having bending rigidity such as a steel plate or a synthetic resin. Finish to the desired length by fixing. 27 is an anchor hook attached to the connection plate 25, and 28 is a mooring line for installation.

The state of connection at each side end of the unit is not limited to the above, and both sides may be connected by a connecting member 24, and the order of connection by the fixed connecting member 23 and the connecting member 24 may be changed. May be reversed. Furthermore, the one-point mooring buoy 22 prevents the unit from swinging around and entangled with the mooring line of the buoy 22 when one end of the unit 21 is opened and the wind-off state is reached as shown in FIG. It is a one-point mooring, and a multi-point mooring using two or more mooring lines using a rotary joint for preventing entanglement is of course good.

If necessary, an anchor hook 27 may be attached to the middle of each unit and connected by a mooring line 28 as shown in FIG. 6 showing a set of units described above. In this case, the connecting portion between the unit and the mooring line 28 is connected by the easily removable connecting member 24 similar to the connecting member 24 described above. According to the above configuration, each unit is continuously extended to a predetermined length to surround a site area or to be installed downstream of a predetermined location and fixedly installed with a mooring line, thereby closing the pollution by the curtain portion 9. To settle the sludge.

At this time, the resistance of the tide flow and the flow of water applied to the curtain portion 9 acts on the tension member 13 to which the curtain portion 9 is connected, and does not directly act on the buoyant body 12, A large stress or a shocking stress is not applied to the buoyant body 12. Therefore, in order to prevent an unexpected situation such as breakage of the unit 21 from occurring in stormy weather, when the connecting member 24 to the buoy 22 and the mooring line 28 are attached, the connecting member 24 is cut or locked. Remove unit 2
5 is released from the connection with the buoy 22 and is fixed to the buoy 22 by the fixed connecting member 23 on the other side as shown in FIG. This prevents the unit 21 from being damaged and prevents the unit 21 from being damaged.

When the weather recovers, each connecting member 2
4 can be re-expanded.

[0020]

According to the present invention described in detail above, one end of the unit of the anti-pollution film integrally formed by attaching the curtain portion to the float portion is fixedly connected to the mooring buoy, and the other end is connected to the mooring buoy. The mooring buoy is connected to the mooring buoy by an easily attachable and detachable connecting member, and one side end of the next unit is fixedly connected to the mooring buoy so that the units can be successively extended to the site, so that the By releasing the connecting state of the connecting member, the unit can be held in the mooring buoy in the state of being blown away at only one end,
This has the effect of preventing the unit from being damaged without applying stress, and has the effect of being able to be easily extended by restoring the connecting member when the weather recovers.

[Brief description of the drawings]

FIG. 1 is a front view of a main part showing an embodiment.

FIG. 2 is a front view of the unit.

FIG. 3 is an enlarged side view of a main part of the unit.

FIG. 4 is an explanatory view showing an extended state.

FIG. 5 is an explanatory diagram showing an open state.

FIG. 6 is an explanatory view of an assembled unit.

FIG. 7 is a front view showing a conventional example.

FIG. 8 is an explanatory view of a locking portion.

[Explanation of symbols]

 9 Curtain part 11 Float part 12 Buoyant body 13 Tension member 14 Fixture 21 Unit 22 Mooring buoy 23 Fixed connecting member 24 Connecting member 28 Mooring cable

Claims (4)

[Claims] 1. A connecting member in which one end of a pollution control membrane unit integrally formed by attaching a curtain portion to a float portion is fixedly connected to a mooring buoy, and the other end is easily attached to and detached from the next mooring buoy. A pollution prevention membrane characterized in that the mooring buoy is connected and one end of the next unit is fixedly connected to the mooring buoy so that the units are successively extended to the site. 2. The anti-pollution membrane according to claim 1, wherein both ends of the unit are connected to the mooring buoy by a connecting member which can be easily attached and detached. 3. The anti-pollution film according to claim 1, wherein the connecting member can be cut with a blade. 4. A pollution control membrane according to claim 1, wherein the mooring buoy is a one-point mooring buoy.