Bs En Iso 22282-2 Pdf !link!

BS EN ISO 22282-2:2012 defines procedures for measuring water permeability in soils and rocks via borehole open systems, supporting Eurocode 7 geotechnical site investigations. The standard covers techniques for assessing groundwater flow in foundation design and environmental assessments, replacing parts of BS 5930. For official access, you can find the full document on the BSI Knowledge portal or the ISO Online Browsing Platform.

: Specifies the equipment needed, the preparation of the borehole, the execution of the test, and the required data for reporting results. Where to Find the Document bs en iso 22282-2 pdf

Measurement: Record the volume of water flowing through the sample over a specific time (constant head) OR record the time for water to drop between two points (falling head).

Calculation: Apply the appropriate formula from the standard to compute k.

) for foundation design, seepage analysis, and slope stability. BS EN ISO 22282-2:2012 defines procedures for measuring

D. Data Interpretation

Correction for hydraulic head losses in the system.
Calculation formulas for Lugeon values (for rock) and hydraulic conductivity K (for soils).
Presentation of pressure-flow graphs to identify laminar vs. turbulent flow.

1. The Constant Head Method

Best for: Sands, gravels, highly permeable soils.
Procedure: Water is continuously introduced into a borehole or casing at a constant flow rate. The head level is maintained constant. Permeability (k) is calculated using the measured flow rate and the head difference.
Typical k value range: > 10⁻⁵ m/s