JPS6363808A - Floating breakwater - Google Patents

Abstract

PURPOSE:To greatly raise the waves-breaking performance of a floating breakwater by a method in which floats are moored to the bottom of sea, and water- holding connectors of a double structure with weights are attached to the outside and inside of the floats. CONSTITUTION:Long floats 10A and 10B of two rows are moored to a cable 8 connected to an anchor block 7 set the seabed 1. Water-holding connectors 11A and 11B whose ends are fixed are doubly provided for the outsides and insides of the bottoms of the floats 10A and 10B, where the rocking movement of the floats 10A and 10B by waves is controlled by the sea water portions A and B serving as dampers. The construction period can thus be greatly shortened and the construction cost can also be reduced even in the case of great deep water.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a floating wave levee that can shorten the construction period for its installation and can be constructed at low cost.

[Prior art]

The conventional gravity breakwater shown in Fig. 4 forms a mound 2 of rubble or the like on the seabed 1, and a caisson 3 is installed on top of the mound 2.
This breakwater receives waves W from outside the port 4 and prevents them from affecting the inside of the port 5, but in this case, as the ground becomes soft and the water gets deep, the construction period will increase. The disadvantage was that the construction cost increased significantly as the length increased.

On the other hand, in the conventional floating breakwater shown in Figure 5, which has a lower construction period and construction cost than the gravity type breakwater,
A buoyant body 6 is moored with a mooring line 8 lashed to an anchor block 7 installed on the seabed 1, and waves W from outside the port 4 are moored.
This buoyant body 6 dissipates the waves to some extent and alleviates the impact on the inside of the port 4. However, in order to dissipate the long wavelength waves W, the width of the embankment body of the buoyant body 6 must be significantly increased. As a result, there was a problem in that construction costs increased.

[Purpose of the invention]

It is an object of the present invention to provide a floating wave levee which can eliminate the above-mentioned conventional problems, significantly shorten the construction period, and reduce construction costs.

[Structure of the invention]

To achieve the above object, the floating wavebank of the present invention moores two or more long buoyant bodies from the seabed in a direction substantially perpendicular to the wave direction, and It is constructed by providing a double layer of water-retaining binding material with its respective ends fixed on each outside and inside, and attaching a weight to each binding material.

〔Example〕

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

FIG. 1 is a perspective view of a floating wave dyke according to the present invention, FIG. 2 is a plan view of the floating wave dyke according to the invention, and FIG. 3 is a sectional view of the floating wave dyke according to the invention.

This floating wavebank shown in FIGS. 1 to 3 consists of two rows of long buoyant bodies 10A and IOBs extending substantially perpendicularly to the direction of waves W, and mooring lines lashed to anchor blocks 7 installed on the seabed 1. 8, and these buoyant bodies 10A, I
A double layer of water-retaining binding materials 11A and IIB with their respective ends fixed on each outside and inside of the bottom of the OB is provided, and dust 12 such as a sand bag is placed on these water-retaining binding materials 11A and IIB. It is installed.

The water-retentive binding materials 11A and 11B may be, for example, a rubber sheet whose ends are fixed between two rows of buoyant bodies 10A and 10B, or a large number of chains whose ends are fixed between buoyant bodies 10A and IOB. By using various materials such as a cloth-like sheet stretched along the surface and attaching a weight 12 to it, a double water-retentive bonding material 11A and 11B is formed in seawater as shown in FIG. A seawater portion B is formed between the inside of the water-retaining binding material 11B and the seawater surface.

In addition, the buoyancy body 10A, the IOB and the water-retaining binding material 1
The length of the waves 1A and IIB in the direction substantially perpendicular to the direction of the wave W can be set to an appropriate length as necessary.

In the floating breakwater constructed in this way, the seawater portions A and B act as dampers, and the waves W cause the buoyant body 10A to
In addition to controlling the movement of the IOB, the gap between the buoyant bodies can be considered as part of the width of the levee body, so it is possible to improve the wave-dissipating performance even for long wavelength waves compared to the conventional floating wave levee. Waves W coming from outside the port 4 are received by this floating breakwater, and the influence of the waves W does not reach inside the port 5. This floating wave levee can significantly shorten the construction period and cost less than conventional gravity-type and floating wave levees.

Note that both end surfaces of the seawater portions A and B formed by the water-retentive binding materials 11A and IIB are partially covered with sheet materials through which seawater flows, thereby reducing the resistance of the floating wavebank against waves W. It can also be increased.

〔Effect of the invention〕

As explained above, the floating breakwater of the present invention has the advantage that even in the case of deep water, the construction period can be significantly shortened and the construction cost can be reduced.

In addition, in the floating breakwater of the present invention, the seawater portion formed by the double water-retentive binding material exhibits the effect as a damper, controlling the oscillation of the buoyant body, and also controlling the width of the breakwater between the buoyant bodies. Since it can be regarded as a single part of the waveform, it has the advantage that the wave-dissipating performance for long-wavelength waves can be significantly improved over that of conventional floating wavebanks.

Furthermore, since a weight is attached to the double water-retentive binding material, the binding material is always in a catenary shape.
It has the advantage that it does not sag, and the wave-dissipating performance can be improved accordingly.

Note that the present invention can be particularly effectively applied as a long-wavelength type floating wavebank.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a floating wave dyke according to the present invention, FIG. 2 is a plan view of the floating wave dyke according to the present invention, FIG. 3 is a sectional view of the floating wave dyke according to the present invention, and FIG. The figure is a sectional view of a conventional gravity type breakwater, and FIG. 5 is a sectional view of a conventional floating breakwater. 1... Seabed, 8... Mooring line, IOA, IOB...
Buoyant body, IIA, IIB...water-retaining binding material, 12.
...Weight, W...Wave.

Claims (1)

[Claims] A water-retentive connection in which two or more long buoyant bodies are moored from the seabed in a direction approximately perpendicular to the wave direction, and the respective ends are fixed to the outside and inside of these two or more buoyant bodies. A floating breakwater with double layers of material and weights attached to each bonding material.