ISO INTERNATIONAL STANDARD 22476-7 First edition 2012-12-01 Geotechnical investigation and testing Field testing - Part 7: Borehole jack test Reconnaissance etessaisgeotechniques-Essais enplace- Partie 7: Essai au dilatometre rigide diamétral Reference number ISO 22476-7:2012(E) LSO @ ISO 2012 IHS under itted without license from IHS Not for Resale ISO22476-7:2012(E) COPYRIGHTPROTECTEDDOCUMENT ISO2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 · CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ ISO 2012 -All rights reserved No reproductic networking permitted without license from IHS Not for Resale ISO 22476-7:2012(E) Contents Page Foreword ..iv Introduction 1 Scope. 2 Normative references 3 Terms, definitions and symbols 3.1 Terms and definitions.. 3.2 Symbols and abbreviations 4 Equipment 4 5 Test procedure... 8 5.1 Calibration of the testing device 8 5.2 Pocket drilling and device placing 8 5.3 Loading programme 8 5.4 Back-filling of borehole 10 5.5 Safety requirements 10 6 Test results. 10 6.1 Basic equations 10 6.2 Loading tests.. 11 6.3 Constant load test 11 7 Reporting. 11 7.1 General..... 11 7.2 Reporting of test results. 12 7.3 Choice of axis scaling .... 13 7.4 Presentation of test results . 13 Annex A (normative) Dimensions of borehole jacks and related device factors 14 Annex B (normative) Calibration and correction. .15 Annex C (normative) Field report example.. ..16 Annex D (informative) Test example.. .17 Annex E (normative) Placing the borehole jack in the ground 20 Annex F (normative) Resolutions and uncertainties. .22 Bibliography .. 23 ili ut license from IHS Not for Resale