ANSI API RP 2GEO-2011 (2021) PDF

Full title and description

St ANSI API RP 2GEO-2011 (R2021) — Geotechnical and Foundation Design Considerations. This recommended practice provides requirements and recommendations for geoscience and foundation engineering applicable to a broad range of offshore structures (site and soil/rock characterization, shallow and pile foundation design, installation and hazards identification).

Abstract

API RP 2GEO (1st Edition, 2011; reaffirmed R2021) consolidates guidance for geotechnical investigations and foundation design for offshore facilities. It covers planning and execution of integrated geoscience studies, characterization of seabed soils and rock, analysis and design considerations for shallow foundations and pile foundations, and soil–structure interaction for subsea items. The document was prepared to align closely with ISO 19901‑4 where applicable and includes an Addendum issued in 2014.

General information

• Status: Current — 1st Edition (2011) reaffirmed (R2021).
• Publication date: 1 April 2011 (first published); reaffirmed Jan 1, 2021 (R2021); Addendum 1 published 1 October 2014.
• Publisher: American Petroleum Institute (API).
• ICS / categories: 93.020 — Earthworks / foundation construction / geotechnical engineering (civil engineering classification typically used for geotechnical/foundation standards).
• Edition / version: 1st Edition (2011) — designated API RP 2GEO (R2021); includes Addendum 1 (2014).
• Number of pages: 136 pages (complete document with addendum referenced separately).

Scope

Provides requirements and recommendations for geoscience and foundation engineering aspects applicable to a broad range of offshore structures rather than a single structure type. Key scope elements include integrated site characterization and geoscience studies, seabed soil and rock characterization, design and installation of seabed-supported (shallow) foundations, design of pile foundations, identification of geohazards, and soil–structure interaction considerations for risers, flowlines and auxiliary subsea structures. The practice does not duplicate general soil mechanics and onshore foundation guidance that is common to both onshore and offshore projects.

Key topics and requirements

• Integrated geoscience and site characterization planning and reporting (investigation strategy, sampling, in‑situ testing, laboratory testing).
• Soil and rock description, classification and strength/stiffness parameters for design.
• Design approaches for shallow (seabed-supported) foundations including stability, bearing capacity and settlement assessment.
• Pile foundation design methods, capacity estimation and installation considerations.
• Soil–structure interaction for subsea items (risers, pipelines, small structures) and guidance on modelling and design checks.
• Identification and assessment of geohazards (scour, faulting, shallow gas, slope instability) affecting foundation selection and design.
• Recommendations to harmonize practice with ISO 19901‑4 (where appropriate) and to apply industry best practice for offshore geotechnical design.

Typical use and users

Used by offshore geotechnical engineers, foundation designers, geoscientists, structural engineers, project engineers for oil & gas and offshore wind, classification societies, regulatory reviewers and asset owners/operators to define investigation programs, evaluate seabed conditions, select foundation types and perform foundation design/verification for fixed and certain floating offshore structures.

Related standards

Closely related to ISO 19901‑4 (Geotechnical and foundation design considerations) and referenced alongside other API offshore standards such as API RP 2A and API RP 2SK. The RP has an issued addendum (Addendum 1, 2014) and is maintained in API’s standards catalogue (Addenda & Errata listings).

Keywords

Geotechnical, foundation design, offshore foundations, shallow foundations, pile foundations, seabed, soil characterization, rock characterization, site investigation, ISO 19901‑4, API RP 2GEO, geohazards.

FAQ

Q: What is this standard?

A: API RP 2GEO is a recommended practice titled "Geotechnical and Foundation Design Considerations" that gives guidance for offshore geotechnical investigations and foundation design. It is published by the American Petroleum Institute and is the 1st edition (2011) reaffirmed as R2021.

Q: What does it cover?

A: It covers planning and conduct of integrated geoscience/site characterization, soil and rock testing and parameter derivation, design and installation considerations for seabed-supported and piled foundations, soil–structure interaction for subsea items, and identification/assessment of geohazards relevant to offshore foundations.

Q: Who typically uses it?

A: Offshore geotechnical engineers, foundation and structural designers, project teams in oil & gas and offshore wind, classification societies and regulators, and asset owners/operators use it to set investigation scope, derive design parameters and perform foundation design and verification.

Q: Is it current or superseded?

A: The 1st edition was published 1 April 2011 and was reaffirmed as current in 2021 (R2021). An Addendum (Addendum 1) was published in October 2014. Users should check API’s publications store or official API notices for any later amendments or errata.

Q: Is it part of a series?

A: Yes — it sits with other API offshore recommended practices and is aligned where applicable with the ISO 19901 series (notably ISO 19901‑4) and is commonly cross-referenced with API RP 2A and related offshore design guidance.

Q: What are the key keywords?

A: Geotechnical, foundations, offshore, piles, seabed, site characterization, soil testing, rock, geohazards, ISO 19901‑4, API RP 2GEO.