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CEN
EN ISO 22476-7:2012

EN ISO 22476-7:2012

Current

Current

The latest, up-to-date edition.

Geotechnical investigation and testing - Field testing - Part 7: Borehole jack test (ISO 22476-7:2012)

Published date

01-12-2012

Publisher

Comite Europeen de Normalisation

Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Equipment
5 Test procedure
6 Test results
7 Reporting
Annex A (normative) - Dimensions of borehole jacks and
        related device factors
Annex B (normative) - Calibration and correction
Annex C (normative) - Field report example
Annex D (informative) - Test example
Annex E (normative) - Placing the borehole jack in the ground
Annex F (normative) - Resolutions and uncertainties
Bibliography

ISO 22476-7:2012 specifies the equipment requirements, execution of and reporting on borehole jack tests.

It specifies the procedure for conducting a borehole jack test in ground stiff enough not to be adversely affected by the drilling operation. Two diametral cylindrical steel loading plates are placed in the ground and opened by pressure. Pressure applied to, and associated opening of, the probe are measured and recorded so as to obtain a stress-displacement relationship of the ground for the range of the expected design stress.

ISO 22476-7:2012 applies to test depths of < 100 m and to testing either on land or off-shore.

Committee
CEN/TC 341
DocumentType
Standard
PublisherName
Comite Europeen de Normalisation
Status
Current

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