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 testBS EN ISO 22476-5:2012 BRITISH STANDARDNational forewordThis British St
2、andard is the UK implementation of EN ISO 22476-5:2012. It partially supersedes BS 5930:1999+A2:2010, which is currently being revised 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) a
3、re also provided in this standard. In the meantime, where conflict arises between these documents, the provisions of BS EN ISO 22476-5:2012 take precedence.The UK participation in its preparation was entrusted to Technical Committee B/526/3, Site investigation and ground testing.A list of organizati
4、ons represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2013. Published by BSI Standards Limited 2013ISB
5、N 978 0 580 77122 4 ICS 93.020 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2013.Amendments/corrigenda issued since publicationDate Text affectedEURO
6、PEAN 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 en place - Partie 5: Essai au dilatomtre
7、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 CEN/CENELEC Internal Regulations which
8、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 Centre or to any CEN member. This Europ
9、ean 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 as the official versions. CEN members are
10、 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, Netherlands, Norway, Poland, Portugal, Rom
11、ania, 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 exploitation in any form and by any means
12、reserved worldwide for CEN national Members. Ref. No. EN ISO 22476-5:2012: EBS EN ISO 22476-5:2012 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
13、ELOT, in collaboration with Technical Committee ISO/TC 182 “Geotechnics“. This European Standard 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 la
14、test by June 2013. Attention is drawn to the possibility that some of the elements of this 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 normali
15、sation nationaux des pays suivants sont tenus de mettre cette Norme europenne en application : Allemagne, Ancienne Rpublique yougoslave de Macdoine, Autriche, Belgique, Bulgarie, Chypre, Croatie, Danemark, Espagne, Estonie, Finlande, France, Grce, Hongrie, Irlande, Islande, Italie, Lettonie, Lituani
16、e, Luxembourg, Malte, Norvge, Pays-Bas, Pologne, Portugal, Rpublique tchque, Roumanie, Royaume-Uni, Slovaquie, Slovnie, Sude, Suisse et Turquie. BS EN ISO 22476-5:2012 ISO 22476-5:2012(E) ISO 2012 All rights reserved iiiContents PageForeword iv Introduction v 1 Scope 1 2 Normative references . 1 3 T
17、erms, 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 lines 84.5 Measurement and control accuracy . 84.6 Data logging 95 Test procedure .
18、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 device placing .105.7 Test execution 115.8 End of loading 125.9 Back-filling of bo
19、rehole .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 Choice of axis scaling 207.4 Presentation of test results 20 Annex A (normative
20、) 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 .31BS EN ISO 22476-5:2012 ISO 22476-5:2012(E)ForewordISO (the International Organization for Standardizatio
21、n) is a worldwide federation of national standards 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 rep
22、resented on that committee. International organizations, 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 ar
23、e drafted in accordance with the rules given in the 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 Internationa
24、l Standard requires approval by at least 75 % of the 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 prep
25、ared by the European Committee for Standardization (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
26、 cooperation between ISO and CEN (Vienna Agreement).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
27、pressuremeter test Part 5: Flexible dilatometer test 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 reservedBS EN IS
28、O 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 representative of the stresses to be applied by the proposed structure. Local experience normally improves the application
29、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 evaluation of the tests. Identification and classification results (ISO 14688-1 and ISO 14689-1) are available from every sepa
30、rate 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 vBS EN ISO 22476-5:2012BS EN ISO 22476-5:2012Geotechnical investigation and testing Field testing Part 5: Flexible dilatometer test1 ScopeThis part of ISO 2
31、2476 specifies the equipment requirements, execution of and reporting on flexible dilatometer tests.NOTE This part of ISO 22476 fulfils the 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
32、 applicable to tests in ground stiff enough not to be adversely affected by the drilling operation.This part of ISO 22476 is applicable to four 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 conduct
33、ed either on land or off-shore.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including amendments) applies.I
34、SO 10012, Measurement management systems Requirements for measurement processes and measuring equipmentISO 14688-1, Geotechnical investigation and testing Identification and classification of soil Part 1:Identification and descriptionISO 14689-1, Geotechnical investigation and testing Identification
35、 and classification of rock Part 1:Identification and descriptionISO 22475-1, Geotechnical investigation and testing Sampling methods and groundwater measurements Part 1: Technical principles for executionEN 791, Drill rigs SafetyEN 996, Piling equipment Safety requirementsENV 13005:1999, Guide to t
36、he expression of uncertainty in measurement3 Terms, definitions and symbols3.1 Terms and definitionsFor the purposes of this document, the following terms and definitions apply:3.1.1 flexible dilatometer cylindrical flexible probe which can be expanded by the application of hydraulic pressure or pre
37、ssurized gas and which contains transducers for the measurement of the displacements of the flexible membrane and of the internal pressureINTERNATIONAL STANDARD ISO 22476-5:2012(E) ISO 2012 All rights reserved 1BS EN ISO 22476-5:2012 ISO 22476-5:2012(E)3.1.2 equipment for flexible dilatometer test c
38、omplete 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 which are necessary to bring the f
39、lexible 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 cavity with circular cross-section
40、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 (see Figure 1)3.1.6 nominal di
41、ameter 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 pressure in the flexible dilatome
42、ter, 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 flexible dilatometer diameter and
43、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
44、 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 test distance between the ground level and the centre of the expanding leng
45、th of the dilatometer measured along the borehole axis (see Figure 2)2 ISO 2012 All rights reservedBS EN ISO 22476-5:2012 ISO 22476-5:2012(E)3.1.15 operator qualified person who carries out the test3.2 Symbols and abbreviationsFor the purposes of this document, the symbols given in Table 1 apply. IS
46、O 2012 All rights reserved 3BS EN ISO 22476-5:2012 ISO 22476-5:2012(E)Table 1 SymbolsSymbol Description Unita Membrane compression coefficient in variant B dilatometer mm.MPa1d Corrected pocket diameter mmd1 Corrected pocket diameter at time t1 mmd2 Corrected pocket diameter at time t2 mmdc Compress
47、ion calibration cylinder diameter mmdd External diameter of the dilatometer mmdr Pocket diameter as read at the measuring unit mmds Nominal diameter of the pocket after application of the seating pressure mmEFDT Youngs Modulus of flexible dilatometer test MPaG1 Loading shear modulus in procedure C M
48、PaGFDT Shear modulus of flexible dilatometer test MPaGL Loading shear modulus of flexible dilatometer test MPaGR Reloading shear modulus of flexible dilatometer test MPaGU Unloading shear modulus of flexible dilatometer test MPaGUR Unloading/reloading shear modulus of flexible dilatometer test MPakf
49、 Creep parameter mmLFD Length of the expanding part of the probe mmLg Axial distance between transducer or LVDT section and membrane clamping ringmmLd Length of the measuring segment of the dilatometer mmp Applied pressure after correction MPap1.1 Constant full relief pressure for loops in procedure A MPap1 Pressure at reversal point at first loop MPap2 Pressure at reversal point at second loop MPap3 Pressure at reversal point at third loop MPapmax Maximum applied pressure during a test MPapm Pressure
