ISO 22282-2-2012 PDF

Full title and description

Geotechnical investigation and testing — Geohydraulic testing — Part 2: Water permeability tests in a borehole using open systems. This International Standard specifies requirements for determining local permeability in soils and rocks (above and below the groundwater level) by conducting water permeability tests in an open borehole as part of geotechnical investigation services.

Abstract

ISO 22282-2:2012 defines test principles, required equipment, preparation of test sections, three principal test methods (constant flow rate, variable head and constant head), data reduction and reporting requirements for in‑situ water permeability tests performed in open boreholes. It also includes guidance on testing in unsaturated soils and on multi‑step testing protocols.

General information

• Status: Published (confirmed international standard).
• Publication date: June 2012 (first edition, 2012-06-01).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: Primary: 93.020 (Earthworks, foundations and underground works); additional hydrological grouping often referenced as 13.080.40 in related listings.
• Edition / version: Edition 1 (2012).
• Number of pages: 27 pages (ISO original edition; page counts can vary in national/adopted versions).

Scope

Specifies procedures to determine the local permeability (hydraulic conductivity) of soils and rocks in an open borehole using water injection or withdrawal. The standard covers test planning, isolation and preparation of a test section, selection and calibration of equipment, execution of constant flow, variable head and constant head tests, interpretation of test data (including equations and guidance for different flow regimes), and detailed reporting requirements. It is intended for use within geotechnical investigations performed in accordance with EN 1997‑1 and EN 1997‑2 (Eurocode 7 ground investigation and testing).

Key topics and requirements

• Test principles for open‑borehole permeability measurements (assumptions, isolation of test section, saturated/unsaturated conditions).
• Required equipment and instrumentation (measuring tubes/annular spaces, pumps, flow meters, level gauges and data logging).
• Preparation of test sections and pre‑saturation procedures for low‑permeability soils.
• Three accepted test methods: constant flow rate, variable head and constant head (guidance on suitable permeability ranges and measurement intervals).
• Data analysis procedures for calculation of permeability coefficient (k), transmissivity and related parameters; criteria for test termination and recovery measurements.
• Field and laboratory reporting requirements including test conditions, geometry, hydraulic heads, flow records, calculated values and uncertainty/limitations.

Typical use and users

Used by geotechnical engineers, hydrogeologists, drilling contractors and consultants performing in‑situ permeability investigations for foundations, cut‑offs, tunnel and shaft works, dewatering design and groundwater impact assessments. Typical clients include engineering consultancies, infrastructure owners, dam and tunnelling projects, environmental assessment teams and national geotechnical agencies.

Related standards

ISO 22282-2 is part of the ISO 22282 series (Geotechnical investigation and testing — Geohydraulic testing: Part 1 General rules; Part 2 Water permeability tests in a borehole using open systems; Part 3 Water pressure tests in rock; Part 4 Pumping tests; Part 5 Infiltrometer tests; Part 6 Water permeability tests in a borehole using closed systems). It is intended to be used in conjunction with EN 1997‑1 and EN 1997‑2 (Eurocode 7 — geotechnical design and ground investigation standards).

Keywords

Geohydraulic testing; permeability; hydraulic conductivity; borehole tests; open‑hole permeability; constant head; variable head; constant flow; in‑situ testing; geotechnical investigation; groundwater.

FAQ

Q: What is this standard?

A: ISO 22282-2:2012 is an international standard that specifies methods and requirements for performing water permeability tests in open boreholes to determine local permeability of soils and rocks.

Q: What does it cover?

A: It covers test principles, equipment, test section preparation (including pre‑saturation for low‑permeability soils), three main field test methods (constant flow, variable head, constant head), data reduction, interpretation and reporting.

Q: Who typically uses it?

A: Geotechnical and groundwater engineers, drilling and testing contractors, consultants and project teams involved in foundation design, dewatering, seepage assessment, tunnelling and other works where in‑situ permeability information is required.

Q: Is it current or superseded?

A: ISO 22282-2 was published in June 2012 (first edition). The ISO record lists it as a published/confirmed international standard; users should check their national standards body or ISO catalogue for the latest confirmation or any amendments before use.

Q: Is it part of a series?

A: Yes — it is Part 2 of the ISO 22282 series on geohydraulic testing (Part 1 general rules, Parts 3–6 cover other field methods such as pressure tests in rock, pumping tests, infiltrometer tests and closed‑system borehole tests).

Q: What are the key keywords?

A: Permeability, hydraulic conductivity, borehole testing, open systems, constant head, variable head, constant flow, geohydraulic testing, groundwater.