ISO 22476-2-2005 PDF

Full title and description

ISO 22476-2:2005 — Geotechnical investigation and testing — Field testing — Part 2: Dynamic probing. This International Standard specifies requirements for indirect investigations of soil by dynamic probing as part of geotechnical site investigations.

Abstract

ISO 22476-2:2005 defines equipment, execution, calibration and reporting requirements for dynamic probing methods used to characterise soil stratigraphy and relative resistance by measuring penetration per blow or blows per unit depth. The procedures are intended to support geotechnical investigations in accordance with EN 1997 (geotechnical design standards).

General information

• Status: Published (confirmed after systematic review).
• Publication date: 2005-01.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 93.020 (Earthworks; foundation construction; underground works).
• Edition / version: Edition 1 (2005-01).
• Number of pages: 30.

Scope

This part of ISO 22476 covers indirect soil investigation by dynamic probing methods (driven probes or probes advanced by repeated hammer blows) to assess relative ground resistance and stratigraphy. It sets out minimum requirements for apparatus (probe geometry, rods and hammers), test procedure (site preparation, driving technique, measurement of penetration per blow), calibration of energy delivered and reporting of results. The standard is written for use within the geotechnical investigation framework defined by EN 1997.

Key topics and requirements

• Definitions and terminology for dynamic probing tests and components (probe, rod, hammer, energy ratio).
• Equipment specifications: probe tip and rod dimensions, hammer mass and drop mechanism, allowable tolerances.
• Energy calibration procedures and measurement of delivered energy (energy ratio or efficiency checks).
• Test execution: site preparation, driving procedure, number of blows, depth increments, handling of refusal and record-keeping.
• Data recording and mandatory report content: test location, datum, equipment details, blow counts/penetration, corrections applied and interpretation guidance.
• Health, safety and site-practical considerations for carrying out dynamic probing safely and reproducibly.
• Basic guidance on correlation of dynamic probing results with soil type, stratigraphy and other in situ tests (used as part of a wider investigation program).

Typical use and users

Used by geotechnical engineers, site investigation contractors, drilling crews and laboratories as part of ground investigation programs for foundations, earthworks and site characterisation. Typical applications include preliminary site investigation, infill between boreholes for stratigraphic mapping, and quick-field screening where direct sampling or more complex tests are not practical.

Related standards

ISO 22476 is a multi-part series covering a range of field tests. Relevant related parts include ISO 22476-1 (electrical cone and piezocone CPT), ISO 22476-3 (standard penetration test), ISO 22476-4 (pressuremeter tests), ISO 22476-5 (flexible dilatometer test) and other parts such as ISO 22476-11, -12, -14, -15 and -16 which cover flat dilatometer, mechanical CPT, borehole dynamic probing, measuring-while-drilling and borehole shear tests respectively. For a full list of parts and the series structure consult the ISO 22476 series information.

Keywords

dynamic probing; DPT; field testing; geotechnical investigation; probe; hammer energy; penetration per blow; in situ test; ISO 22476; site investigation.

FAQ

Q: What is this standard?

A: ISO 22476-2:2005 is an international standard that specifies requirements for conducting dynamic probing tests in geotechnical site investigations, covering equipment, procedure, calibration and reporting.

Q: What does it cover?

A: It covers indirect soil investigation by dynamic probing — the hardware (probe, rods, hammer), calibration of delivered energy, test execution (driving technique, blow/penetration measurement), record keeping and reporting, and basic interpretation guidance to support geotechnical assessment.

Q: Who typically uses it?

A: Geotechnical engineers, site investigation contractors, drilling crews and laboratories performing field testing and preliminary ground characterisation use this standard as part of a broader investigation program.

Q: Is it current or superseded?

A: As published in January 2005 (Edition 1) ISO 22476-2 was confirmed as the current version following systematic review (last confirmation noted in 2020). The part has one published amendment (ISO 22476-2:2005/Amd 1:2011). Users should check their national standards body or ISO for any more recent revisions or national/EN adoptions before relying on it for compliance.

Q: Is it part of a series?

A: Yes — ISO 22476 is a multi-part series covering many common in situ field tests (cone/piezocone, dynamic probing, SPT, pressuremeter tests, dilatometer tests, measuring-while-drilling, etc.). Each part addresses a specific field method and together they form the ISO 22476 Field Testing series.

Q: What are the key keywords?

A: dynamic probing; field test; DPT; hammer energy; penetration; in situ testing; geotechnical investigation; ISO 22476.