ISO INTERNATIONAL STANDARD 22476-11 First edition 2017-04 Geotechnical investigation and testing - Field testing Part 11: Flat dilatometer test Reconnaissance et essais géotechniques - Essais en place - Partie 11: Essai au dilatometre plat Reference number ISO 22476-11:2017(E) os1 International Organization for Standardization @ IS0 2017 =ZHEJIANG INST OF STANDARDIZATION C1 5956617 vided by IHS underI ted without license from IHS IS0 22476-11:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2017, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISOcopyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org Intenationaibr PrganizationforStandardization icensee-ZHEJIANG INST OF STANDARDIZRoISQ s1.7 - All rights reserved Not for Resale, 2017/6/28 00:55:55 etworking permitted without license from IHS IS0 22476-11:2017(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references 3 Terms, definitions and symbols. 3.1 Terms and definitions .1 3.2 Symbols 4 4 Equipment 4.1 Dilatometer equipment 4 4.2 Insertionapparatus .6 5 Test procedure. 1 5.1 Maintenance and checks 7 5.2 Membrane calibration procedure .8 5.3 Flat dilatometer test. .8 5.3.1 Operations before testing ..8 5.3.2 Basic test procedure .8 5.3.3 C-pressure readings .9 5.3.4 Operations after testing .9 5.4 DMT dissipation test (DMTA) .9 5.5 DMT short dissipation test (DMTA-s) 5.6 Safety requirements ..10 6 Test results. .10 7 Report. .11 7.1 General. .11 7.2 Reporting of test results ..11 7.2.1 General information 11 7.2.2 Location of sounding .12 7.2.3 Test equipment. ..12 7.2.4 Test procedure ..13 7.2.5 Test results. .13 7.3 Presentation of results ..13 Annex A (informative) Example interpretation formulae ..15 Bibliography .17 ii: See=ZHEJIANG INSTOFSTANDARDIZATION C15956617 d without license from IHS