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ISO DIS 19901-4 2015 Edition, January 22, 2015 PETROLEUM AND NATURAL GAS INDUSTRIES - SPECIFIC REQUIREMENTS FOR OFFSHORE STRUCTURES - PART 4: GEOTECHNICAL AND FOUNDATION DESIGN CONSIDERATIONS
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Description / Abstract:
This part of ISO 19901 contains requirements and recommendations
for those aspects of geoscience and foundation engineering that are
applicable to a broad range of offshore structures, rather than to
a particular structure type. Such aspects are:
-site and soil characterization,
-identification of hazards,
-design and installation of shallow foundations supported
by the seabed,
-design and installation of pile foundations
-soil–structure interaction for auxiliary structures, e.g.
subsea production systems, risers and flowlines (guidance given in
A.10);
-design of anchors for the stationkeeping systems of
floating structures (guidance given in A.11).
Particular requirements for marine soil investigations are
detailed in ISO 19901-8.
Aspects of soil mechanics and foundation engineering that apply
equally to offshore and onshore structures are not addressed. The
user of this part of ISO 19901 is expected to be familiar with such
aspects.
ISO 19901-4 outlines methods developed primarily for the design
of shallow foundations with an embedded length (L) to diameter (D)
ratio L/D<1 (Clause 7) or relatively long and flexible pile
foundations with L/D>10 (Clause 8). This standard does not apply
to intermediate foundations with 1