BS EN ISO 22282-3:2012

Foreword
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Equipment
5 Test procedure
6 Reports
Annex A (informative) - Record of measured values and test
        results of the water pressure test
Annex B (informative) - Interpretation of test results
Annex C (informative) - Evaluation of test results assuming
        stationary conditions
Annex D (informative) - Evaluation of constant head and
        constant rate tests
Annex E (informative) - Groutability
Bibliography

Describes the requirements for water pressures tests (WPT) carried out in boreholes drilled into rock as part of geotechnical investigation and testing according to EN 1997-1 and EN 1997-2.

This part of ISO22282 specifies the requirements for water pressures tests (WPT) carried out in boreholes drilled into rock as part of geotechnical investigation and testing according to EN1997-1 and EN1997-2.

The tests are used to investigate the following:

• hydraulic properties of the rock mass, which are mainly governed by discontinuities;

• absorption capacity of the rock mass;

• tightness of the rock mass;

• effectiveness of grouting;

• geomechanical behaviour, e.g. hydrofracturing, hydrojacking.

Many effects of the geohydraulic tests are not only influenced by the ground itself, but stem from the testing procedure. Historically, the water pressure test was evaluated based on the assumption that the stationary behaviour was achieved. Recent advances in geohydraulics have shown that transient phenomena are often present. This part of ISO22282 attempts to address the limitations of certain testing procedures without restricting the required equipment too stringently.