ISO 17892-11:2019 Geotechnical investigation and testing一Laboratory testing of soil – Part 11: Permeability tests.
This document specifies methods for the laboratory determination of the water flow characteristics in soil.
This document is applicable to the laboratory determination of the coefficient of permeability of soil within the scope of geotechnical investigations.
NOTE This document fulfils the requirements of the determination of the coefficient of permeability of soils in the laboratory for geotechnical investigation and testing in accordance with EN 1997-1 and EN 1997-2.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 386, Liquid-in-glass laboratory thermometers — Principles of design, construction and use
ISO 14688-1, Geotechnical investigation and testing — Identification and classification of soil — Part 1:
Identification and description
ISO 17892-1, Geotechnical investigation and testing — Laboratory testing of soil — Part 1: Determination of water content
ISO 17892-2, Geotechnical investigation and testing — Laboratory testing of soil — Part 2: Determination of bulk density
ISO 17892-3, Geotechnical investigation and testing — Laboratory testing of soil — Part 3: Determination of particle density
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain term inological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1
permeameter
apparatus (cell) containing the test specimen in a permeability test
3.2
flow rate
volume of water passing through a specimen per unit time
5 Apparatus
5.1 General
The equipment shall undergo regular calibration, maintenance and checks as specified in Annex A.
The permeability test arrangement requires a container for the specimen (the permea meter) which may have either rigid or flexible walls and a system for applying and measuring water pressures to either or both ends of the specimen. Schematics of some typical arrangements are shown in Figures 2 to 4.
5.2 Permeameters
5.2.1 General
The minimum internal dimension (height and diameter) of the permeameter shall be at least six times the maximum particle size of the specimen.
5.2.2 Rigid wall permeameters
5.2.2.1 General
Rigid wall permeameters shall be made of corrosion-resistant materials of sufficient rigidity to resist deformation during the test. The inlet and outlet arrangements shall be of sufficient flow capacity to not influence the test results. Hydrophobic coating can be used on the inside of the permea meter, mould or ring to prevent channels and cavities that can cause bypass seepage along the surface. This coating can consist of silicon grease, petroleum jelly coated with bentonite powder or other suitable lubricant.
5.2.2.2 Cylindrical permeameter.ISO 17892-11 pdf download.