| 摘要 |
<p>This invention relates to a method of protecting a structure such as a vessel or platform located in water covered with sheet ice. In a preferred embodiment, an ice trenching machine is suspended from a boom supported at the top of the structure. The ice trenching machine removes ice in a circular path at a rate approximately equal to the rate of movement of the sheet ice toward the protected structure. Means are provided so that the boom can be moved entirely around the top of the structure so that a trench can be cut in the ice in any direction from the structure or to completely surround it.</p> |
