EN ISO 17892-9-2018 Geotechnical investigation and testing - Laboratory testing of soil - Part 9 Consolidated triaxial compression tests on water saturated soil.pdf

1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Geotechnical investigation and testing - Laboratory testing of soilPart 9: Consolidated triaxial compression tests on water saturated soilsBS EN ISO 17892-9:2018National forewordThis British Standard is the UK implement

2、ation of EN ISO 17892-9:2018. It is identical to ISO 17892-9:2018. It supersedes BS 1377-8:1990, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee B/526/3, Site investigation and ground testing.A list of organizations represented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

3、 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 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 94087 3ICS 93.020Compliance w

4、ith 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 30 April 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 17892-9:2018EUROPEAN

5、STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 17892-9April 2018ICS 13.080.20; 93.020 Supersedes CEN ISO/TS 17892-9:2004EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref. No. E

6、N ISO 17892-9:2018: EAll rights of exploitation in any form and by any means reserved worldwide for CEN national MembersGeotechnical investigation and testing - Laboratory testing of soil - Part 9: Consolidated triaxial compression tests on water saturated soils (ISO 17892-9:2018)Reconnaissance et e

7、ssais gotechniques - Essais de laboratoire sur les sols - Partie 9: Essais en compression lappareil triaxial consolids sur sols saturs (ISO 17892-9:2018)Geotechnische Erkundung und Untersuchung - Laborversuche an Bodenproben - Teil 9: Konsolidierte triaxiale Kompressionsversuche an wassergesttigten

8、Bden (ISO 17892-9:2018)This European Standard was approved by CEN on 2 February 2018.CEN members are bound to comply with the 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 a

9、nd bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management 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

10、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 the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav

11、 Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.English VersionISO 17892-9:2018Foreword viIntrodu

12、ction vii1 Scope . 12 Normative references 13 Terms and definitions . 24 Symbols 35 Apparatus . 55.1 General . 55.2 Triaxial cell . 75.3 Confining membrane . 75.4 Porous discs . 75.5 Filter paper . 85.6 Pressure systems . 85.7 Load frame 85.8 Measuring devices 85.8.1 Load measuring device . 85.8.2 P

13、ressure measuring devices 95.8.3 Vertical displacement measuring device 95.8.4 Volume change measuring device . 95.9 Cell and back pressure fluids 95.10 Ancillary apparatus . 96 Test procedure .106.1 General requirements and equipment preparation .106.2 Preparation of specimens . 106.3 Saturation of

14、 specimen . 116.3.1 Saturation 116.3.2 Application of cell and back pressure .116.3.3 Saturation checks .126.4 Isotropic consolidation (CIU and CID tests) . 136.5 Anisotropic consolidation (CAU and CAD tests) .136.6 End of consolidation 136.7 Shearing . 136.7.1 General. 136.7.2 Undrained tests (CIU

15、and CAU) 146.7.3 Drained tests (CID and CAD) 146.8 Dismounting . 157 Test results .157.1 Bulk density, dry density and water content . 157.2 Calculations of test parameters . 157.2.1 Height after consolidation 157.2.2 Corrected cross sectional area 167.2.3 Corrections for elastic membrane .167.2.4 C

16、orrection for filter paper strips .167.2.5 Vertical total stress177.2.6 Vertical effective stress 177.2.7 Horizontal total stress 177.2.8 Horizontal effective stress 187.2.9 Pore pressure change187.2.10 Vertical strain . 187.2.11 Vertical strain during shear . 187.2.12 Volumetric strain 187.2.13 Vol

17、umetric strain during shear 18 ISO 2018 All rights reserved iiiContents PageBS EN ISO 17892-9:2018ISO 17892-9:20188 Test report 188.1 Mandatory reporting 188.2 Graphical presentation 198.3 Optional reporting 20Annex A (normative) Calibration, maintenance and checks 21Annex B (informative) Additional

18、 calculations for effective shear strength .23Bibliography .25iv ISO 2018 All rights reservedBS EN ISO 17892-9:2018ISO 17892-9:2018European forewordThis document (EN ISO 17892-9:2018) has been prepared by Technical Committee ISO/TC 182 “Geotechnics“ in collaboration with Technical Committee CEN/TC 3

19、41 “Geotechnical Investigation and Testing” the secretariat of which is held by BSI.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 October 2018, and conflicting national standards shall be withdr

20、awn at the latest by October 2018.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.This document supersedes CEN ISO/TS 17892-9:2004.According to the CE

21、N-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hunga

22、ry, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. ISO 2018 All rights reserved vBS EN ISO 17892-9:2018Endorsement noticeThe text of ISO 17892-9:2018

23、 has been approved by CEN as EN ISO 17892-9:2018 without any modification.ISO 17892-9:2018ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out

24、 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 organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO col

25、laborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different appr

26、oval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the s

27、ubject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any tr

28、ade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adhe

29、rence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.This document was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 341, Geotechnical investigation and testing,

30、in collaboration with ISO Technical Committee TC 182, Geotechnics, in accordance with the agreement on technical cooperation between ISO and CEN (Vienna Agreement).This first edition of ISO 17892-9 cancels and replaces ISO/TS 17892-9:2004, which has been technically revised. It also incorporates ISO

31、/TS 17892-9:2004/Cor.1:2006.A list of all the parts in the ISO 17892 series can be found on the ISO website.vi ISO 2018 All rights reservedBS EN ISO 17892-9:2018ISO 17892-9:2018IntroductionThis document covers areas in the international field of geotechnical engineering never previously standardised

32、 It is intended that this document presents broad good practice throughout the world and significant differences with national documents is not anticipated. It is based on international practice (see Reference 1). ISO 2018 All rights reserved viiBS EN ISO 17892-9:2018Geotechnical investigation and

33、testing - Laboratory testing of soil Part 9: Consolidated triaxial compression tests on water saturated soils1 ScopeThis document specifies a method for consolidated triaxial compression tests on water-saturated soils.This document is applicable to the laboratory determination of triaxial shear stre

34、ngth under compression loading within the scope of geotechnical investigations.The cylindrical specimen, which can comprise undisturbed, re-compacted, remoulded or reconstituted soil, is subjected to an isotropic or an anisotropic stress under drained conditions and thereafter is sheared under undra

35、ined or drained conditions. The test allows the determination of shear strength, stress-strain relationships and effective stress paths. All stresses and strains are denoted as positive numerical values in compression.NOTE 1 This document provides a test for a single specimen. A set of at least thre

36、e relatable tests are required to determine the shear strength parameters from these tests. Procedures for evaluating the results are included in Annex B and, where required, the shear strength parameters are to be included in the report.Special procedures such as:a) tests with lubricated ends;b) mu

37、lti-stage tests;c) tests with zero lateral strain (K0) consolidation;d) tests with local measurement of strain or local measurement of pore pressure;e) tests without rubber membranes;f) extension tests;g) shearing where cell pressure varies,are not fully covered in this procedure. However, these spe

38、cific tests can refer to general procedures described in this document.NOTE 2 This document fulfils the requirements of consolidated triaxial compression tests for geotechnical investigation and testing in accordance with EN 1997-1 and EN 1997-2.2 Normative referencesThe following documents are refe

39、rred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 14688-1, Geotechnical inve

40、stigation and testing Identification and classification of soil Part 1: Identification and descriptionINTERNATIONAL STANDARD ISO 17892-9:2018 ISO 2018 All rights reserved 1BS EN ISO 17892-9:2018ISO 17892-9:2018ISO 17892-1, Geotechnical investigation and testing Laboratory testing of soil Part 1: Det

41、ermination of water contentISO 17892-2, Geotechnical investigation and testing Laboratory testing of soil Part 2: Determination of bulk densityISO 17892-3, Geotechnical investigation and testing Laboratory testing of soil Part 3: Determination of particle density3 Terms and definitionsFor the purpos

42、es of this document, the following terms and definitions apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at https:/www.electropedia.org/ ISO Online browsing platform: available at https:/www.iso.org/obp3.1CIU-test

43、isotropically consolidated undrained test3.2CAU-testanisotropically consolidated undrained test3.3CID-testisotropically consolidated drained test3.4CAD-testanisotropically consolidated drained test3.5pore pressurepressure of water in the void space within the soil specimen3.6back pressureexternal pr

44、essure by which the pore pressure is increased prior to consolidation or shearing to ensure saturation3.7cell pressurepressure applied to the cell fluid3.8deviator stressdifference between the vertical total stress and the horizontal total stress3.9effective stressdifference between the total stress

45、 and pore pressure3.10failurestress or strain condition at which one of the following criteria are met: peak deviator stress2 ISO 2018 All rights reservedBS EN ISO 17892-9:2018ISO 17892-9:2018 peak effective stress ratio i.e. the ratio between the vertical and horizontal effective stress a specified

46、 deformation criterion e.g. 10 % vertical strain other definitions if required4 SymbolsAiinitial cross sectional area of the specimenAcorcross-sectional area of the specimen at any point in timea cross-sectional area of the piston if an external load cell is usedB pore pressure coefficient i.e. the

47、ratio of the increase in pore pressure, u resulting from an increment of cell pressure, cunder undrained conditionsDcspecimen diameter at the end of consolidationDiinitial specimen diameterDminitial internal diameter of the confining membrane (before it is placed on specimen)Emelastic modulus of the

48、 confining membraneF factor for calculating the rate of displacement of the load framef factor relating the vertical strain to the specimen volumetric strainHcspecimen height at the end of consolidationHiinitial height of specimenh distance from the top of the top cap to the mid-height of the specim

49、enKfpload (when fully mobilized) carried by filter paper covering a unit length of the speci-men perimeterP vertical load readingPfpfraction of perimeter covered by filter papertminitial thickness of the unstressed membranet50time required for 50 % primary consolidation to take placet100time required for 100 % primary consolidation to take placeu pore pressure at the mid height of the specimenuBback pressure (i.e. the pore pressure at start of shearing)Viinitial volume of specimenvmaxrate of vertical displacement of the