Understanding BS EN ISO 22282-2: A Guide to Geohydraulic Borehole Testing

The primary goal of this standard is to establish groundwater conditions and determine the hydraulic properties of the ground. These parameters are vital for:

To ensure accuracy, the standard mandates specific equipment standards and calibration protocols:

: An instantaneous change in the water level (head) is induced—either by adding water (falling head) or removing it (rising head)—and the rate at which the level returns to its original state is recorded. Constant Head Method :

: The water level in the borehole is maintained at a constant height above or below the static water level, and the volume of water required to maintain this level is measured over time. Equipment and Technical Requirements

: A steady flow of water is injected or withdrawn while recording the change in the water head over time until stability is reached. Variable Head Method (Falling or Rising Head) : Best for : Intermediate permeability ranges.

: Provides the final interpretation of results, including calculated permeability values, graphs of head vs. time, and details on any unsaturated soil conditions encountered. Where to Access BS EN ISO 22282-2

: All instruments must be calibrated before use, and these records must be included in the final test report. Implementation and Reporting

: Ensuring that engineering works can withstand geohydraulic pressures.

The standard applies to tests conducted both in various geological conditions. Core Testing Methods