What is ISO 17892‑11-Permeability tests for soil about?
ISO 17892‑11 is the eleventh part of the multi-series of documents that are applicable to geotechnical investigation and testing. ISO 17892‑11 specifies methods for the laboratory determination of the water flow characteristics in soil.
ISO 17892‑11 is applicable to the laboratory determination of the coefficient of permeability of soil within the scope of geotechnical investigations.
Note: ISO 17892‑11 fulfills the requirements of the determination of the coefficient of permeability of soils in the laboratory for geotechnical investigation and testing
Who is ISO 17892‑11- Permeability tests for soil for?
ISO 17892‑11 on geotechnical investigation and testing is applicable to:
- Geotechnical and geo-environmental testing laboratories
- Geotechnical consultants
- Civil engineers
- Geotechnical engineers
- Land/site surveyors
Why should you use ISO 17892‑11- Permeability tests for soil?
A geotechnical investigation is used to study the soil and geologic conditions of a property and to make constructive suggestions and design requirements. The rate of flow of water, under laminar flow conditions, through a unit cross sectional are of soil mass, under unit hydraulic gradient, is defined as coefficient of permeability. The calculation of the coefficient of permeability assumes the application of Darcy’s law for laminar flow of water under saturated conditions.
ISO 17892‑11 provides laboratory test methods for the determination of the coefficient of permeability of soils within the international field of geotechnical engineering.
The results of the test are used to determine the coefficient of permeability of the soil specimen.
If you are a geotechnical engineer, the tests described under the ISO 17892-11 provide indications on the drainage characteristics of soil, rate of consolidation and predict rate of settlement of soil bed. These parameters are crucial to mitigate concerns of excess pore water pressure. As a result, you can address engineering concerns related to seepage of water through soil and impart structural stability of slopes.
What’s changed since the last update?
BS EN ISO 17892‑11:2019 partially supersedes BS 1377‑5:1990. BS EN ISO 17892‑11:2019 includes some technical changes with respect to BS 1377‑5:1990. These include:
- The document has been restructured with general revision of text and figures and addition of specimen preparation procedures
- Types of apparatus have been included for rigid wall permeameter, both cylindrical and oedometer ring equipment, and flexible wall permeameter
- Permeability measurement by the constant head, falling head and constant flow conditions have been included
- Normative Annex A on calibration, maintenance and checks has been added
