JPS581110Y2 - offshore structures - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an offshore structure in which various structures are constructed on a floating body moored on the ocean.

In recent years, offshore storage and transfer bases for various energy sources, offshore power plants, and various plant barges have been considered in various fields, but there are particularly restrictions on mooring these offshore structures in the open ocean (and economic From a gender perspective, no effective method has been established.

As a major cause of this (1) External forces such as wind and waves are large.

(2) Structures for reducing external forces, such as semi-subtype structures, can be extremely uneconomical depending on the purpose of use.

(3) The mooring force due to changes in the structure's water intake and movement in waves is extremely large.

For this reason, the idea that breakwaters are indispensable is strongly prevailing, except in bays with particularly favorable sea conditions.

However, as long as a breakwater is assumed, it can be said that it is impossible to compete with these land-based locations in terms of economy.

This is not a problem especially when the water is deep.

In view of the above points, the present invention proposes an offshore structure suitable for semi-permanent mooring on the open ocean with little oscillation without a breakwater.

In FIG. 1, 1 is a building built on a floating body 2 divided into several parts.

Each leg tank 3 extending from the floating body 2 is provided in the surrounding area of the floating body 2.

Leg cargo tanks 3a and 3b at the front and rear ends of the floating body 2 in the longitudinal direction
As shown in FIG.
, 3b, with a narrow flow path 6at6b in the center.
This creates a so-called rock-reducing water tank, and the rolling is reduced by adjusting the ballast water.

In addition, each leg water tank 3 c + 3 d on both sides of the floating body 2 in the longitudinal direction
It is also possible to create a rock-reducing water tank to reduce the vibration of pinching.

On the other hand, a recessed portion 7 that substantially surrounds the floating body 2 is formed on the upper surface of each leg water tank 3 (see FIGS. 3 and 4).

With this configuration, even if a drifting object or a ship hits this offshore structure, the cargo water tank 3 stretched from the floating body 2 will serve as a fender, and the offshore structure itself will not be damaged. .

In addition, the recessed part 7 provided around the floating body 2 on the upper surface of the landing gear tank 3 expands the water line area of the stuttering part relative to the required capacity of the landing gear tank 3, thereby preventing changes in stuttering due to changes in the amount of fuel and other cargo. This recessed portion 7 can be kept to a minimum, and ballast can also be loaded in this recessed portion 7. Combined with the anti-swaying water tank structure, it is possible to stabilize the offshore structure against rocking ups and downs. It also serves as an oil fence in case of oil leakage from the structure 1 or the upper deck.

Furthermore, the structure described above lowers the center of gravity, further increasing stability, and is very convenient for mooring small ships due to its low height above the water surface.

In addition, in the case of a complete lightweight, the cargo tank 3 is designed to be exposed to the water surface, so that damage can be repaired at sea, and if the width of the dock is insufficient at the time of construction, especially the two sides may be constructed separately. They may be joined at sea.

As is clear from the above description, the offshore structure of the present invention is
By installing a cargo water tank with a recessed area around the floating body on which the structure is constructed, the offshore structure itself is safe even if floating objects collide with the offshore structure.
In addition, it is very stable against rocking motions of offshore structures and changes in the amount of cargo loaded, so there is no need to install a breakwater, and the recesses can prevent leakage of waste into the sea. It is.

Moreover, since the recessed part is provided so as to almost surround the floating body, the water line area of the stuttering part is expanded relative to the required capacity of the cargo water tank, and changes in stuttering due to changes in the amount of fuel and other cargo can be minimized. Ballast can also be loaded into this recess.

[Brief explanation of drawings]

Figure 1 is a perspective view of an offshore structure according to an embodiment of the present invention;
The figure is the same plan view, Figure 3 is a sectional view taken along the line A-A in Figure 2, and Figure 4 is the same plan view.
The figure is a front view of FIG. 2. 2... Floating body, 3... Leg cargo tank, 7...
...Recessed part.

Claims (1)

[Scope of utility model registration request] 1. An offshore structure, comprising: a floating body on which a structure is constructed; and a water tank extending around the surrounding area of the floating body, and a recessed portion substantially surrounding the floating body on the upper surface of the water tank.