JPH0348258Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a floating ice breakwater mainly applied to drift ice areas of medium depth.

[Prior art]

Conventionally, ice breakwaters used in drift ice areas have a water depth of 4 to 5 m, as shown in Figures 3 and 4.
A fixed ice break in which the lower part of the column 7 inclined with respect to the drift ice direction F is fixed to the seabed B is used on the coast of 2000.
It is designed to disperse the force of the ice floes pushing against the ground into a horizontal component _FH and a vertical component _FV .

However, although fixed ice breakwaters such as those described above have a proven track record for use in shallow waters at a depth of 4 to 5 m, it is technically possible to apply them to medium-water depths of 10 m or more, but it is not cost-effective. There was a problem that it was uneconomical because the amount of water increases as the square of the water depth.

[Purpose of invention]

The present invention has been made to solve the above-mentioned conventional problems, and aims to provide a floating ice breakwater that is not affected by water depth and can stop drift ice while minimizing costs.

[Structure of the idea]

In order to achieve the above objective, the floating ice breakwater of the present invention has buoyancy on solid pillars that are moored horizontally perpendicular to the direction of the drifting ice via chains to anchors fixed to the seabed. Two or more rows of underwater structures in which a plurality of hollow pillars are erected at equal intervals are arranged so that each hollow pillar in one row is located between each hollow pillar in the other row. In addition, it is constructed by connecting the upper and lower parts of each row of hollow pillars with diagonal pillars.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a floating ice breakwater according to an embodiment of the present invention, and FIG. 2 is a side view of FIG. 1.

First, this floating ice breakwater is installed in a horizontal direction perpendicular to the drift ice direction F, as shown in Figure 1.
Two rows of underwater structure rows , Y,
As shown in FIG. 2, the solid pillars 4 of each underwater structure row X, Y are moored at an appropriate water depth via a chain 5 to an anchor 6 fixed with underwater concrete after drilling a hole in the seabed B. ing.

Next, as shown in FIG. 1, the hollow pillars 1 in one of the two underwater structure rows X and Y are located in the middle of the hollow pillars 1 in the other example, in a staggered manner. It is located in

Furthermore, the hollow column material 1 of each row of underwater structure rows X and Y
The upper and lower parts of the same are connected by an upper diagonal member 2 and a lower diagonal member 3, respectively.

The floating ice breakwater of the present invention, which has the above configuration,
It has resistance against the drift ice force of the drift ice 8 due to the buoyancy of the hollow pillar 1 and the function of the horizontal solid pillar 4 fixed at the bottom as a weight,
For example, it can be fully used as an ice break in medium water depths of 10 m or more.

Generally, the purpose of an ice breakwater is to protect coastal fish and shellfish or their aquaculture facilities, and to prevent the inflow of large ice floes with an ice thickness of, for example, 50 cm or more. Therefore, the column spacing of hollow column material 1 should be approximately 7 times the ice thickness.
By doubling the amount (according to experimental and survey results), it is possible to prevent ice floes with a thickness of 50 cm or more from flowing in.

In this example, two underwater structure rows X and Y
However, it is also possible to have two or more rows depending on the drift ice situation.

[Effect of idea]

As explained above, the floating ice breakwater of the present invention can be applied as a medium-depth ice break without being affected by the water depth, and can stop drift ice with minimal equipment cost. Additionally, since it is a floating type, it does not destroy the environment around the seabed and has the advantage of being less affected by wave power.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a floating ice breakwater according to an embodiment of the present invention, Fig. 2 is a side view of Fig. 1, and Figs. 3 and 4 are illustrations of conventional fixed ice breakwaters. FIG. 1... Hollow column material, 2, 3... Diagonal material, 4... Solid column material, 5... Chain, 6... Anchor, B...
Seabed, F...Drift ice direction, X, Y...Underwater structure array.

Claims (1)

[Scope of utility model registration request] An underwater structure array in which multiple buoyant hollow pillars are erected at equal intervals on solid pillars that are moored horizontally perpendicular to the direction of the drift ice via chains to anchors fixed to the seabed. Two or more rows are arranged so that each hollow pillar in one row is located between each hollow pillar in the other row, and the top and bottom of each row of hollow pillars are connected by diagonal pillars. A floating ice break.