prEN ISO 19901-4
(Main)Petroleum and natural gas industries - Specific requirements for offshore structures - Part 4: Geotechnical design considerations (ISO/DIS 19901-4:2022)
Petroleum and natural gas industries - Specific requirements for offshore structures - Part 4: Geotechnical design considerations (ISO/DIS 19901-4:2022)
Erdöl- und Erdgasindustrie - Besondere Anforderungen an Offshore-Bauwerke - Teil 4: Geotechnische und Fundament-Auslegungsmerkmale (ISO/DIS 19901-4:2022)
Industries du pétrole et du gaz naturel - Exigences spécifiques relatives aux structures en mer - Partie 4: Bases conceptuelles géotechniques (ISO/DIS 19901-4:2022)
Industrija za predelavo nafte in zemeljskega plina - Posebne zahteve za naftne ploščadi - 4. del: Obravnava geotehničnih značilnosti projektiranja (ISO/DIS 19901-4:2022)
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Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2022
Industrija za predelavo nafte in zemeljskega plina - Posebne zahteve za naftne
ploščadi - 4. del: Obravnava geotehničnih značilnosti projektiranja (ISO/DIS 19901-
4:2022)
Petroleum and natural gas industries - Specific requirements for offshore structures -
Part 4: Geotechnical design considerations (ISO/DIS 19901-4:2022)
Erdöl- und Erdgasindustrie - Besondere Anforderungen an Offshore-Bauwerke - Teil 4:
Geotechnische und Fundament-Auslegungsmerkmale (ISO/DIS 19901-4:2022)
Industries du pétrole et du gaz naturel - Exigences spécifiques relatives aux structures
en mer - Partie 4: Bases conceptuelles géotechniques (ISO/DIS 19901-4:2022)
Ta slovenski standard je istoveten z: prEN ISO 19901-4
ICS:
75.180.10 Oprema za raziskovanje, Exploratory, drilling and
vrtanje in odkopavanje extraction equipment
93.020 Zemeljska dela. Izkopavanja. Earthworks. Excavations.
Gradnja temeljev. Dela pod Foundation construction.
zemljo Underground works
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT INTERNATIONAL STANDARD
ISO/DIS 19901-4
ISO/TC 67/SC 7 Secretariat: BSI
Voting begins on: Voting terminates on:
2022-05-19 2022-08-11
Petroleum and natural gas industries — Specific
requirements for offshore structures —
Part 4:
Geotechnical design considerations
ICS: 75.180.10
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
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ISO/DIS 19901-4:2022(E)
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PROVIDE SUPPORTING DOCUMENTATION. © ISO 2022
ISO/DIS 19901-4:2022(E)
ISO/DIS 19901-4:2022(E)
ISO/TC 67/SC 7/WG 10
Date: 2021-11-DD
Petroleum and natural gas industries — Specific requirements for
offshore structures — Part 4: Geotechnical design considerations
DIS stage
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transferred to the ISO/TC 67 Secretariat for the sole purpose of balloting and/or publication and on the
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ii
ISO/DIS 19901-4:2022(E)
Contents
Foreword . xvi
Introduction . xvii
1 Scope . 1
2 Normative references . 3
3 Terms and definitions . 3
4 Symbols and abbreviated terms . 6
4.1 General . 6
4.2 Symbols for shallow and intermediate foundation design . 6
4.3 Symbols for pile foundation design . 8
4.4 Symbols for soil-structure interaction for auxiliary subsea structures, risers and
flowlines . 11
4.5 Symbols for design of anchors for stationkeeping systems . 11
4.6 Abbreviated terms . 13
5 General requirements . 13
5.1 General . 13
5.2 Design cases and safety factors . 14
5.3 Representative and design values of soil parameters . 15
5.3.1 Generic principles . 15
5.3.2 Determination of representative and design values of soil parameters . 15
5.3.3 Geotechnical reliability-based design . 17
5.4 Testing and instrumentation . 17
6 Geotechnical data acquisition and identification of hazards . 18
6.1 General . 18
6.2 Geological modelling and identification of hazards . 18
6.2.1 General . 18
6.2.2 Assessment of site geohazards . 18
6.3 Carbonate soils . 19
6.3.1 General . 19
6.3.2 Characteristic features and properties of carbonate soils . 19
6.3.3 Foundations in carbonate soils . 19
7 Design of shallow and intermediate foundations . 20
7.1 General . 20
7.2 Principles . 22
7.2.1 General principles . 22
7.2.2 Foundation embedment . 22
7.2.3 Sign conventions, nomenclature and action reference point . 24
7.3 Acceptance criteria . 24
7.3.1 Material and action factors . 24
7.3.2 Use of partial factors in design . 25
7.3.3 Special cases . 25
7.4 Design considerations . 25
7.4.1 Adjusting for soil plug weight . 25
7.4.2 Skirt spacing . 26
7.4.3 Foundation base perforations . 26
7.4.4 Skirtless foundations penetrating into soft soils . 26
7.4.5 Tensile stresses beneath foundations . 27
7.4.6 Omni-directional actions . 27
ISO/DIS 19901-4:2022(E)
7.4.7 Interaction with other structures .27
7.4.8 Multiple foundations .27
7.4.9 Hydraulic stability .27
7.4.10 Unconventional soils or soil profiles.28
7.4.11 Selection of soil parameter values for design .28
7.5 Ultimate limit state (stability) .29
7.5.1 Assessment of bearing capacity of shallow foundations .29
7.5.2 Assessment of sliding capacity of shallow foundations .31
7.5.3 Assessment of capacity of intermediate foundations .34
7.6 Serviceability limit state (displacements and rotations) .34
7.6.1 General .34
7.6.2 Serviceability of shallow foundations under static loading .34
7.6.3 Serviceability of intermediate foundations .36
7.6.4 Serviceability in response to dynamic and cyclic actions .36
7.7 Alternative methods of design .37
7.7.1 Yield surface approach .37
7.7.2 Performance-based design approach .37
7.8 Installation .37
7.8.1 General .37
7.8.2 Skirt penetration resistance .38
7.8.3 Required and allowable under-pressure .38
7.9 Relocation, retrieval and removal .39
8 Pile foundation design .
...
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