JPS6045496A - Surface floating structure - Google Patents

Abstract

PURPOSE:To secure rigidity for a deck and a stanchion as well as to improve an icebreaking effect, by installing a reinforcing member-cum-icebreaking device, which consists in downward, convex semispherical form in externals, in position nearby a coupling part between a stanchion member and a deck member of a surface floating structure. CONSTITUTION:A surface floating structure is constituted of a deck member 1, a buoyant member 2 situated underwater in the more lower part than the former and a stanchion member 3 whose both ends are coupled with the deck member 1 and the buoyant member 2 each. In addition, a reinforcing member-cum-icebreaking member 10 consisting in downward, convex semispherical form in externals is installed in position nearby a coupling part between the stanchion member 3 and the deck member 1. With this constitution, an ice floe 9 can be made to be effectively broken into pieces. And, what is more, sufficient rigidity is securable owing to a downward, convex spherical construction.

Description

[Detailed description of the invention] Ru.

An example of a conventional floating structure is a semi-submersible offshore structure for drilling undersea oil fields, as shown in FIG. This is composed of a deck member 01, a buoyancy member 02, a strut member 03, a diagonal place 04, and a horizontal place 05, and during its operation, it is moored to the seabed 6 with a predetermined water drop using an anchor 7 and a mooring line 8. . However, during mooring or towing, drift ice 9
In the event of a collision, diagonal place 04, which has relatively low rigidity! ! There was a risk that the Take-Horizontal Place 05 etc. would be damaged.

In view of the above-mentioned conventional circumstances, the present invention proposes a Hiko floating structure that can be operated on drift ice, icebergs, and frozen sea areas.

The present invention will be explained below based on one embodiment shown in FIGS. 2 to 5.

2 and 3, 1 is a deck member, 2 is a buoyant member located in the water below the deck member 1, 3 is a strut member whose both ends are connected to the deck member and the buoyant member 2, respectively; is a reinforcing member/ice crushing device having a downwardly convex hemispherical outer shape near the joint between the support member 3 and the deck member 1. Therefore, if the water level is adjusted so that the water surface is located near the ice crushing device 10 during operation, the drift ice 9 will be broken by the ice crushing device 10 as shown in FIGS. 4 and 5, and the structure will be It is often damaged by

As described above, the floating structure according to the present invention includes a deck member, a buoyant member located in the water below the deck member, and a strut member whose both ends are connected to the deck member and the buoyant member, respectively. , and a reinforcing member and ice-breaking device having a downwardly convex hemispherical outer shape is installed near the joint between the support member and the deck member, and the hemispherical ice-breaking device 1
0, as shown in FIGS. 4 and 5, the drift ice 9 is susceptible to bending failure, which is said to be brittle due to the strength of ice, and reduces the water load.

In addition, if the drift ice 9 is an iceberg, the collision force will be large, and in conventional structures, diagonal places or horizontal places, which have relatively low rigidity, may be damaged, but in the present invention, these places are completely abolished and deck members, Since the structure is a rigid frame structure in which the rigidity of the support column members is sufficiently increased, the water resistance of the structure can also be increased. Furthermore, since a hemispherical ice crushing device (also serving as a reinforcing member) is attached to the joint between the deck member and the strut member, which is likely to become a dangerous section, its supplementary effect can be fully expected.

The present invention can also be applied to drilling rigs for oil test drilling, multi-purpose floating work platforms, various plant cages, maritime cities, and the like.

[Brief explanation of drawings]

FIG. 1 is a front view showing a conventional floating structure on water. Figures 2 to 5 are for explaining the present invention, and Figure 2 is a front view, Figure 3 is a view taken along the arrows ■-■ in Figure 2, and Figure 4 is a
The figure is a side view showing the state of destruction of the drift ice, and FIG. 5 is a plan view of the same. DESCRIPTION OF SYMBOLS 1... Deck member, 2... Buoyancy member, 3... Strut member, 10... Ice crushing device.

Claims (1)

[Claims] It is composed of a deck member, a buoyant member located in the water below the deck member, and a strut member whose both ends are connected to the deck member and the buoyant member, respectively, and near the joint between the strut member and the deck member. 1. A floating structure on water, comprising a reinforcing member/ice crushing device having a downwardly convex hemispherical outer shape.