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The experience gained with concrete gravity structures is summarized on the basis of the installation of thirteen such structures for oil or gas production in the North Sea. Key data are given regarding the various types of structural foundations. The platform sites are mostly flat or gently sloping with 70 to 153 m water depths. The soils are generally pleistocene dense sands and preconsolidated clays except for recent sands and silts in the upper 0.2–3.0 m. Procedures followed for touchdown, skirt penetration, base seating, and grouting are summarized as are also control measurements needed and data handling procedures. Design predictions are compared with actually recorded field measurements during the installation phase.
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Eide et al. (1979) studied this question.
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