The Structural Engineer > Archive > Volume 51 (1973) > Issues > Issue 1 > North Sea Structures - a New Breed
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North Sea Structures - a New Breed

All the fixed structures in the North Sea are at present supported on piles driven into the sea-bed and, as the water gets deeper and the waves get higher, they are furthermore anchored in the sea-bed to resist uplifts almost as big as the down thrusts. The structures do, of course, differ in layout and in detail, depending upon specific requirements and environments, but they remain in principle the same and are to a great extent governed by the necessity of pile driving. Structures could also be supported on a concrete raft resting on or in the sea-bed and it can be shown that it is an advantage to have the raft sunk into the sea-bed. A method for sinking the raft to a required depth below sea-bed level is proposed and the tool necessary for the job is being developed at present. Frode J. Hanson