1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 22476-5:2012Geotechnical investigation and testing Field testingPart 5: Flexible dilatometer testCopyright European Committee for Standardization Provided by IHS under
2、license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 22476-5:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 22476-5:2012. It partially supersedes BS 5930:1999+A2:2010, which is currently being rev
3、ised in order to remove conflicting material.The tests included in BS 5930:1999 (Clauses 25.7.2.1 and 25.7.4.1, and more generally in Clauses 27.7.3, 25.7.5 and 25.7.6) are also provided in this standard. In the meantime, where conflict arises between these documents, the provisions of BS EN ISO 224
4、76-5:2012 take precedence.The UK participation in its preparation was entrusted to Technical Committee B/526/3, Site investigation and ground testing.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the
5、 necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2013. Published by BSI Standards Limited 2013ISBN 978 0 580 77122 4 ICS 93.020 Compliance with a British Standard cannot confer immunity from legal obligations.This British Stand
6、ard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2013.Amendments/corrigenda issued since publicationDate Text affectedCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking per
7、mitted without license from IHS-,-,-EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 22476-5 December 2012 ICS 93.020 English Version Geotechnical investigation and testing - Field testing - Part 5: Flexible dilatometer test (ISO 22476-5:2012) Reconnaissance et essais gotechniques - Essais e
8、n place - Partie 5: Essai au dilatomtre flexible (ISO 22476-5:2012)Geotechnische Erkundung und Untersuchung - Felduntersuchungen - Teil 5: Versuch mit dem flexiblen Dilatometer (ISO 22476-5:2012) This European Standard was approved by CEN on 25 November 2012. CEN members are bound to comply with the
9、 CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management
10、 Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status a
11、s the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Ne
12、therlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of ex
13、ploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 22476-5:2012: ECopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 2247
14、6-5:2012 EN ISO 22476-5:2012 (E) 3 Foreword This document (EN ISO 22476-5:2012) has been prepared by Technical Committee CEN/TC 341 “Geotechnical Investigation and Testing“, the secretariat of which is held by ELOT, in collaboration with Technical Committee ISO/TC 182 “Geotechnics“. This European St
15、andard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2013, and conflicting national standards shall be withdrawn at the latest by June 2013. Attention is drawn to the possibility that some of the elements of this
16、 document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. Selon le Rglement Intrieur du CEN/CENELEC, les instituts de normalisation nationaux des pays suivants sont tenus de mettre cette Norme europenne en applicati
17、on : Allemagne, Ancienne Rpublique yougoslave de Macdoine, Autriche, Belgique, Bulgarie, Chypre, Croatie, Danemark, Espagne, Estonie, Finlande, France, Grce, Hongrie, Irlande, Islande, Italie, Lettonie, Lituanie, Luxembourg, Malte, Norvge, Pays-Bas, Pologne, Portugal, Rpublique tchque, Roumanie, Roy
18、aume-Uni, Slovaquie, Slovnie, Sude, Suisse et Turquie. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 22476-5:2012 ISO 22476-5:2012(E) ISO 2012 All rights reserved iii
19、Contents PageForeword iv Introduction v 1 Scope 1 2 Normative references . 1 3 Terms, definitions and symbols 13.1 Terms and definitions . 13.2 Symbols and abbreviations 34 Equipment . 54.1 General . 54.2 Dilatometer probe 64.3 Pressure control and displacement measuring units . 84.4 Connecting line
20、s 84.5 Measurement and control accuracy . 84.6 Data logging 95 Test procedure . 95.1 Safety requirements . 95.2 Assembly of parts . 95.3 Calibration of the testing device and corrections of readings . 95.4 Uncertainties of measurement .105.5 Preparation for the sounding .105.6 Pocket drilling and de
21、vice placing .105.7 Test execution 115.8 End of loading 125.9 Back-filling of borehole .126 Test results 126.1 Basic equations .126.2 Loading test 136.3 Constant pressure tests (procedure D) .166.4 Uncorrected and corrected graphs 177 Test report .187.1 General .187.2 Reporting of test results 187.3
22、 Choice of axis scaling 207.4 Presentation of test results 20 Annex A (normative) Calibration and corrections .21 Annex B (normative) Performing the test 24 Annex C (normative) Field report and GFDTresults . 28Annex D (normative) Accuracy and uncertainties .30Bibliography .31Copyright European Commi
23、ttee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 22476-5:2012 ISO 22476-5:2012(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards
24、 bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organiza
25、tions, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in th
26、e ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of t
27、he member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 22476-5 was prepared by the European Committee for Standardization
28、 (CEN) Technical Committee CEN/TC 341, Geotechnical investigation and testing, in collaboration with Technical Committee ISO/TC 182, Geotechnics, Subcommittee SC 1, Geotechnical investigation and testing, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement
29、).ISO 22476 consists of the following parts, under the general title Geotechnical investigation and testing Field testing: Part 1: Electrical cone and piezocone penetration tests Part 2: Dynamic probing Part 3: Standard penetration test Part 4:Mnard pressuremeter test Part 5: Flexible dilatometer te
30、st Part 7: Borehole jack test Part 9: Field vane test Part 10: Weight sounding test Technical Specification Part 11: Flat dilatometer test Technical Specification Part 12: Mechanical cone penetration test (CPTM)iv ISO 2012 All rights reservedCopyright European Committee for Standardization Provided
31、by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 22476-5:2012 ISO 22476-5:2012(E)IntroductionThe results of dilatometer tests are used for deformation calculations provided that the range of stresses applied in the test are rep
32、resentative of the stresses to be applied by the proposed structure. Local experience normally improves the application of the results. In addition, for identification and classification of the ground, the results of sampling (according to ISO 22475-1) from each borehole are available for the evalua
33、tion of the tests. Identification and classification results (ISO 14688-1 and ISO 14689-1) are available from every separate ground layer within the desired investigation depth (see EN 1997-2:2007, 2.4.1.4(2)P, 4.1(1)P and 4.2.3(2)P). ISO 2012 All rights reserved vCopyright European Committee for St
34、andardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 22476-5:2012Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted wi
35、thout license from IHS-,-,-BS EN ISO 22476-5:2012Geotechnical investigation and testing Field testing Part 5: Flexible dilatometer test1 ScopeThis part of ISO 22476 specifies the equipment requirements, execution of and reporting on flexible dilatometer tests.NOTE This part of ISO 22476 fulfils the
36、requirements for flexible dilatometer tests as part of geotechnical investigation and testing according to EN 1997-1 1 and EN 1997-2 2.This part of ISO 22476 is applicable to tests in ground stiff enough not to be adversely affected by the drilling operation.This part of ISO 22476 is applicable to f
37、our procedures for conducting a test with the flexible dilatometer.This part of ISO 22476 applies to tests performed up to 1 800 m depth. Testing can be conducted either on land or off-shore.2 Normative referencesThe following referenced documents are indispensable for the application of this docume
38、nt. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including amendments) applies.ISO 10012, Measurement management systems Requirements for measurement processes and measuring equipmentISO 14688-1, Geotechnical investigati
39、on and testing Identification and classification of soil Part 1:Identification and descriptionISO 14689-1, Geotechnical investigation and testing Identification and classification of rock Part 1:Identification and descriptionISO 22475-1, Geotechnical investigation and testing Sampling methods and gr
40、oundwater measurements Part 1: Technical principles for executionEN 791, Drill rigs SafetyEN 996, Piling equipment Safety requirementsENV 13005:1999, Guide to the expression of uncertainty in measurement3 Terms, definitions and symbols3.1 Terms and definitionsFor the purposes of this document, the f
41、ollowing terms and definitions apply:3.1.1 flexible dilatometer cylindrical flexible probe which can be expanded by the application of hydraulic pressure or pressurized gas and which contains transducers for the measurement of the displacements of the flexible membrane and of the internal pressureIN
42、TERNATIONAL STANDARD ISO 22476-5:2012(E) ISO 2012 All rights reserved 1Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 22476-5:2012 ISO 22476-5:2012(E)3.1.2 equipment f
43、or flexible dilatometer test complete equipment which is necessary to carry out a flexible dilatometer test: the probe, a hydraulic pump or high-pressure gas in bottles, a measuring unit and cables to connect the probe to the measuring unit and the hydraulic pump or the gas bottleNOTE The parts whic
44、h are necessary to bring the flexible dilatometer probe to the testing point are not included.3.1.3 dilatometer sounding whole series of successive operations in a given borehole, i.e. forming dilatometer pockets and performing dilatometer tests in them3.1.4 dilatometer test pocket cylindrical cavit
45、y with circular cross-section drilled into the ground to receive the dilatometer probe3.1.5 flexible dilatometer test process of expanding the flexible dilatometer so as to press the flexible membrane against the pocket wall and so measure the associated expansion as a function of pressure and time
46、(see Figure 1)3.1.6 nominal diameter of the pocket diameter of the pocket at the time of application of the seating pressure3.1.7 seating pressure pressure during the expansion of the dilatometer at which the dilatometer membrane contacts the pocket wall3.1.8 pressure increment fixed increase of pre
47、ssure in the flexible dilatometer, according to a pre-determined programme and recorded in the control unitNOTE It can also be a decrement.3.1.9 diametral pocket displacement displacement of pocket wall caused by an increase or decrease of any pressure3.1.10 diameter increase/decrease change in flex
48、ible dilatometer diameter and in pocket wall displacement caused by a pressure increment/decrement, and recorded in the measurement unit3.1.11 flexible dilatometer curve graphical plot of pressure versus the associated pocket wall displacement3.1.12 flexible dilatometer shear modulus, GFDT shear modulus calculated from the slope over various intervals of pressure and pocket wall displacement3.1.13 flexible dilatometer modulus, EFDTYoungs modulus calculated from the slope over various intervals of pressure and pocket wall displacement3.1.14 depth of t
