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.
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Sisällysluettelo
Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbols and abbreviations
4 Equipment
5 Test procedure
5.1 Calibration of the testing device
5.2 Pocket drilling and device placing
5.3 Loading programme
5.4 Back-filling of borehole
5.5 Safety requirements
6 Test results
6.1 Basic equations
6.2 Loading tests
6.3 Constant load test
7 Reporting
7.1 General
7.2 Reporting of test results
7.3 Choice of axis scaling
7.4 Presentation of test results
Annex A Dimensions of borehole jacks and related device factors (normative)
Annex B Calibration and correction (normative)
Annex C Field report example (normative)
Annex D Test example (informative)
Annex E Placing the borehole jack in the ground (normative)
ISO 10012:2003 Measurement management systems -- Requirements for measurement processes and measuring equipment
ISO 14688-1:2002 Geotechnical investigation and testing -- Identification and classification of soil -- Part 1: Identification and description
ISO 14689-1:2003 Geotechnical investigation and testing -- Identification and classification of rock -- Part 1: Identification and description
ISO 10012:2003 Measurement management systems -- Requirements for measurement processes and measuring equipment
ISO 14688-1:2002 Geotechnical investigation and testing -- Identification and classification of soil -- Part 1: Identification and description
ISO 14689-1:2003 Geotechnical investigation and testing -- Identification and classification of rock -- Part 1: Identification and description
ISO 22475-1:2006 Geotechnical investigation and testing -- Sampling methods and groundwater measurements -- Part 1: Technical principles for execution
ISO/IEC Guide 98-3:2008 Uncertainty of measurement -- Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)