Mat Foundations for Offshore Structures in Arctic Regions

摘要

Design limit states for offshore gravity structures in the Alaskan Beaufort and Eastern Chukchi continental shelves are discussed. The report contains a description of geological conditions, design loads, and type of structures used. Three foundation types are considered: foundations for artificial islands; foundations for caisson retained island with sand cores; and rigid foundations for various types of gravity structures which are positioned on the ocean floor with a minimum of preparation. Design limit states for these foundations are identified and the required reliability against the occurrence of these limit states is discussed. The authors ability to determine foundation resistance is assessed.