JPS6328175B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ice force mitigation device, and more particularly to an ice force mitigation device that protects oil drilling bases, ports, aquaculture areas, etc. from the growing ice force and the surging ice force in winter. It is something.

Various measures have been taken to protect oil drilling bases, ports, aquaculture areas, etc. that are moored or installed in frozen or drifting areas from the forces of growing ice or the force of drifting ice.

However, these measures not only cost a lot of money, but also, for example, in the case of offshore structures used for oil drilling bases or artificial islands, they need to be specially manufactured for use in frozen areas or drifting ice areas. The current situation is that there are some problems.

The present invention was developed as a result of studies to solve the above-mentioned problems.

Therefore, an object of the present invention is to provide an excellent and simple structure that can protect oil drilling bases, ports, aquaculture areas, etc. from the force of growing ice and the force of surging drift ice in winter, and that is extremely easy to install and dismantle. Our objective is to provide an ice force mitigation device.

That is, the present invention comprises a floating body and a floating body mooring means attached to the floating body, and the floating body has an inclined surface inclined toward the floating body near the water line on at least one side, and the floating body The gist of the present invention is an ice force alleviating device, characterized in that the device is moored so that the slope faces the drift ice pushing side.

Hereinafter, the present invention will be specifically described by way of examples with reference to the drawings.

1 to 5 show embodiments of the present invention.
Figures a and b are perspective explanatory views of the first embodiment; Figures a and b are perspective views of the first embodiment;
b is a perspective explanatory view of the second embodiment, FIG. 3 is a perspective explanatory view showing an example of use, FIGS.
The figure is a perspective explanatory view of the same as above.

In the figure, E denotes an ice force mitigation device according to each embodiment of the present invention, which consists of a floating body 10 and a floating body mooring means 20 attached to this floating body 10. A slope K that slopes toward the floating body 10 is formed nearby.
The floating body 10 is moored so that its inclined surface K faces the direction in which the drift ice A is pushed, that is, the drift ice pushing direction Aa.

To further explain this structure in detail, Fig. 1a
In the first embodiment shown in FIG. 1, the floating body 10 is composed of a rectangular steel box body which is given buoyancy, as shown in the figure, and near the water line a on one side thereof, as it goes upward, there is a An inclined plate 11 is attached to the floating body 10 side.

This inclined plate 11 is designed so that when drift ice comes rushing in,
The vicinity of the end is bent upward along the inclined surface K of the inclined plate 11 and destroyed, and the growing ice force and the surging ice force directly act on the aforementioned oil drilling base, port, or aquaculture area. For example, steel,
It is preferable to use stainless steel or a surface-treated material that is slippery and durable.

Furthermore, as described above, the slope K, which bends the ice near the edge upwards and breaks it, is formed by directly cutting diagonally off one side of the floating body 10, as in the second embodiment shown in FIG. 2a. You may.

In addition, in FIG. 1a and FIG. 2a, the inclined surface K is inclined toward the floating body 10 as it goes upward, but this is because the inclined surface K is inclined toward the floating body 10 as it goes downward.
Of course, it may be tilted toward the 0 side so that when drift ice comes rushing in, the vicinity of the end can be bent downward along the slope K to break it.
(See FIGS. 1b and 2b) Furthermore, as shown in this embodiment, the floating body mooring means 20 includes a mooring tether 2 made of wire, chain, etc. whose upper end 21a is attached to the lower surface 10a of the floating body 10.
1 and an anchor 22 attached to the lower end 21b of this restraint 21.

The number and structure of the floating body mooring means 20 are preferably selected in consideration of the size of the floating body 10, the seabed condition in the area where the floating body is moored, the condition of frozen drift ice, the tidal current, etc.

FIG. 3 shows an example in which a plurality of ice force mitigation devices E are floated and moored side by side to form an ice barrier F around an artificial island G for oil drilling installed in a frozen drifting area.
When a plurality of ice force mitigation devices E are floated and moored in a circular arrangement in a plan view to form an ice breakage F, the shape of each ice force mitigation device E in a plan view is as shown in Fig. 5. , it is desirable to form it in accordance with the radius of curvature of the ice barrier F to be formed.

Next, the effects of the above-mentioned ice force mitigation device E will be explained with reference to FIGS. 3 to 5.

A plurality of ice force mitigation devices E are placed around oil drilling bases, etc. installed in sea areas that freeze or are flooded with drift ice in winter, or on the side where drift ice is pushed, and a plurality of ice force mitigation devices E are installed at each inclination before the ice freeze period arrives. It is moored so that the surface K faces the pushing side of the drift ice A, that is, the direction Aa of the drift ice.
(See Figures 3 and 4a) When the temperature drops and the sea surface freezes, each of the ice force mitigation devices E is firmly fixed to the sea surface by the ice. (See Figure 4b) When the temperature further decreases and the ice grows, pressure is generated inside the ice, or when the ice is pushed in, the area near the edge is moved along the slope K of the ice force mitigation device E. By bending it upward and breaking it, it is possible to prevent the force of growing ice and the force of drifting ice from directly acting on the aforementioned oil drilling bases, ports, or aquaculture areas. (See Figures 4c and 5.) In areas where there is a large amount of drifting ice, as shown in Figure 5, ice breakwaters F consisting of ice force mitigation devices E are installed at intervals. It is desirable to install the

Since the present invention is configured as described above, the following effects are achieved. In other words, (1) ice grows and pressure is generated inside the ice;
When drift ice comes rushing in, it is possible to break the edge of the ice by bending it along the slope A of the ice force mitigation device, and the growing ice force and the pushing ice force directly impact the oil drilling base mentioned above. It is possible to reliably prevent the effects on areas such as seaports, harbors, and aquaculture areas.

(2) It has an extremely simple structure, is strong and lightweight, and is not only extremely easy to install and dismantle, but also can be used repeatedly and is extremely economical.

Therefore, the present invention can provide an excellent ice force mitigation device that can protect oil drilling bases, ports, aquaculture areas, etc. from the growing ice force and the surging ice force during the winter season.

[Brief explanation of the drawing]

1 to 5 show an ice force mitigation device according to an embodiment of the present invention, and FIGS.
A perspective explanatory view of the embodiment, Figures 2a and b are perspective explanatory views of the second embodiment, Figure 3 is a perspective explanatory view showing an example of use, and Figures 4a, b, and c are respectively the main ice force mitigation. FIG. 5 is an explanatory diagram illustrating the function and effect of the device, and FIG. 5 is a perspective explanatory diagram of the same. 10... Floating body, 20... Floating body mooring means, K... Inclined surface.

Claims (1)

[Claims] 1 Consists of a floating body and a floating body mooring means attached to the floating body, the floating body has an inclined surface that slopes toward the floating body near the water line on at least one side, and the floating body is An ice force mitigation device characterized by being moored so that the surface faces the drift ice pushing side.