EN ISO 17892-6-2017 en Geotechnical investigation and testing - Laboratory testing of soil - Part 6 Fall cone test《岩土工程勘察和试验-土壤-第6实验室测试 落锥试验(ISO 17892-6 2017)》.pdf

1、BS EN ISO 17892-6:2017Geotechnical investigation and testing Laboratory testing of soilPart 6: Fall cone test (ISO 17892-6:2017)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN ISO 17892-6:2017 BRITISH STANDARDNational forewordThis British Standard is the UK imp

2、lementation of EN ISO 17892-6:2017. It supersedes DD CEN ISO/TS 17892-6:2004which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee B/526/3, Site investigation and ground testing.A list of organizations represented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 obtained on request

3、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 2017.Published by BSI Standards Limited 2017ISBN 978 0 580 87215 0 ICS 13.080.20; 93.020 Compliance with a Br

4、itish 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 2017.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE

5、NORM EN ISO 17892-6 March 2017 ICS 93.020; 13.080.20 Supersedes CEN ISO/TS 17892-6:2004English Version Geotechnical investigation and testing - Laboratory testing of soil - Part 6: Fall cone test (ISO 17892-6:2017) Reconnaissance et essais gotechniques - Essais de laboratoire sur les sols - Partie 6

6、: Essai de pntration de cne (ISO 17892-6:2017) Geotechnische Erkundung und Untersuchung - Laborversuche an Bodenproben - Teil 6: Fallkegelversuch (ISO 17892-6:2017) This European Standard was approved by CEN on 3 February 2017. CEN members are bound to comply with the CEN/CENELEC Internal Regulation

7、s 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 Centre or to any CEN member. Th

8、is 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 as the official versions. CEN mem

9、bers 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, Netherlands, Norway, Poland, Portu

10、gal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation i

11、n any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 17892-6:2017 EBS EN ISO 17892-6:2017EN ISO 17892-6:2017 (E) 3 European foreword This document (EN ISO 17892-6:2017) has been prepared by Technical Committee CEN/TC 341 “Geotechnical Investigation and Testing”, t

12、he secretariat of which is held by BSI, 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 September 2017, and conflicting national

13、 standards shall be withdrawn at the latest by September 2017. 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. This document supersede

14、s CEN ISO/TS 17892-6:2004. According to the CEN-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 Republi

15、c 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 the United Kingdom. Endorsement notice The text of ISO 17892-6:2017 has

16、been approved by CEN as EN ISO 17892-6:2017 without any modification. BS EN ISO 17892-6:2017ISO 17892-6:2017(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Equipment . 25 Test procedure 45.1 Test specimen preparation . 45.2 Test points . 55.3 Determination

17、 of fall cone penetration . 56 Test results 76.1 Average penetration . 76.2 Estimated undrained fall cone shear strength . 76.3 Additional estimate of undrained fall cone shear strength 77 Test report . 77.1 Mandatory reporting . 77.2 Optional reporting . 8Annex A (normative) Calibration, maintenanc

18、e and checks . 9Bibliography .11 ISO 2017 All rights reserved iiiContents PageBS EN ISO 17892-6:2017ISO 17892-6:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Stan

19、dards 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 organizations, governmental and non-governmental, in liaison with ISO, also t

20、ake part in the work. ISO collaborates 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 p

21、articular, the different approval 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 elemen

22、ts of this document may be the subject 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

23、(see www .iso .org/ patents).Any trade 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 w

24、ell as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .html.ISO 17892-6 was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 341, Geo

25、technical investigation and testing, in collaboration with ISO Technical Committee ISO/TC 182, Geotechnics, in accordance with the agreement on technical cooperation between ISO and CEN (Vienna Agreement).This first edition cancels and replaces ISO/TS 17892-6:2004, which has been technically revised

26、. It also incorporates the Technical Corrigendum ISO/TS 17892-6:2004/Cor 1:2006.A list of all parts in the ISO 17892 series can be found on the ISO website.iv ISO 2017 All rights reservedBS EN ISO 17892-6:2017ISO 17892-6:2017(E)IntroductionThis document covers areas in the field of geotechnical engi

27、neering never previously standardized internationally. 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 2017 All rights reserved vBS

28、 EN ISO 17892-6:2017BS EN ISO 17892-6:2017Geotechnical investigation and testing Laboratory testing of soil Part 6: Fall cone test1 ScopeThis document specifies a method of undrained strength index testing of both undisturbed and remoulded specimens of fine grained soils by the fall cone method.This

29、 document is applicable to the laboratory estimation of undrained shear strength of a soil test specimen within the scope of geotechnical investigations.In the fall cone test, a cone is allowed to fall with its tip towards a soil specimen, and the resulting penetration of the cone into the soil is m

30、easured. The penetration values are used to estimate the undrained shear strength. The fall cone test produces a complex shear in the test specimen, and does not represent either a vertical triaxial compression or a horizontal shear test. However, this index test may be correlated to some estimate o

31、f undrained shear strength determined in the laboratory by other test methods.As the test is performed on a small laboratory specimen, the result may not agree with laboratory tests on larger specimens. In addition, the test specimen may not be fully representative of the soil in its natural state i

32、n the field; for example, the test specimen may not have fissures present in situ at a larger spacing than the specimen size.Therefore, for the above reasons, the test can be regarded as an estimation of undrained shear strength, rather than a true measurement of it.The ratio of the remoulded shear

33、strength to the undisturbed shear strength may be used to estimate the sensitivity of a soil specimen. Time-dependent measurement of the shear strength may be used to assess the thixotropic regain of strength of a remoulded soil specimen.NOTE This document fulfils the requirements of the strength in

34、dex testing of soils for geotechnical investigation and testing in accordance with EN 19971 and EN 19972.2 Normative referencesThe following documents are referred to in text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edi

35、tion cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 14688-1, Geotechnical investigation and testing Identification and classification of soil Part 1: Identification and descriptionISO 17892-1, Geotechnical investigation and

36、 testing Laboratory testing of soil Part 1: Determination of water content3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.INTERNATIONAL STANDARD ISO 17892-6:2017(E) ISO 2017 All rights reserved 1BS EN ISO 17892-6:2017ISO 17892-6:2017(E)ISO and IEC

37、maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp3.1fall cone undrained shear strength of undisturbed soilcufcundrained sh

38、ear strength of an undisturbed fine grained soil specimen estimated by the fall cone method3.2fall cone undrained shear strength of remoulded soilcurfcundrained shear strength of a remoulded fine grained soil specimen estimated by the fall cone method4 EquipmentSee Annex A for calibration requiremen

39、ts for the equipment in this clause.4.1 Cone apparatusThe apparatus shall permit the cone to be held firmly initially and to be released instantaneously to fall freely in the vertical direction into the soil specimen.The apparatus shall have a mechanism which allows the cone to be raised or lowered

40、and adjusted so that the tip of the cone just touches the surface of the specimen before the cone is released.The cone apparatus shall be equipped with a method of measuring the penetration across the range of at least 4 mm to 20 mm penetration. Methods include a linear scale alongside the shaft, or

41、 a circular dial with a pointer needle or an electronic transducer, in both cases bearing on the upper end of the shaft. If the scale is designed for manual reading, it shall be marked in increments of 1 mm or better.4.2 Fall conesA set of cones with cone angles of 30 or 60 and masses (i.e. mass of

42、cone plus shaft) covering a range of possible shear strengths shall be used. Typical examples of suitable fall cones are given on Table 1. There is limited experience or validation of cones of alternative configuration, for example, heavier than 400 g. Alternate cones should be used with caution.Tab

43、le 1 Set of fall cones - typical total masses and tip anglesMass g 10 60 80 100 400Tip angle 60 60 30 30 30A 60 g/60 cone is shown in Figure 1 as a typical example of such a cone.2 ISO 2017 All rights reservedBS EN ISO 17892-6:2017ISO 17892-6:2017(E)Key1 cone a deviation from the geometrical tip at

44、manufacturing2 shaft b maximum wear3 index mark h height of the conical tip4 cone tip tip angleFigure 1 Example of a fall coneWhen penetration readings are taken from a linear scale alongside the shaft, there shall be a distinct index mark for reference near the top of each shaft which shall be clea

45、rly visible when viewing the scale.The cones shall be made of or be coated with a corrosion-resistant material such as stainless steel or chromium, and should have smooth polished surfaces with an average roughness, Ra, of less than 0,8 m. Cones with significant wear or scratches shall be replaced.T

46、he masses of the cones, together with their shafts, shall be within 1 % of the nominal mass and the tip angles shall be within 0,2 of the nominal angles.The deviation from the geometrical tip at manufacturing, a, shall be less than 0,1 mm. The maximum wear, b, shall be less than 0,3 mm (see Figure 1

47、).The height of the conical tip, h, shall be greater than the maximum penetration used in the measurement.4.3 Ancillary apparatus sample extruder; wire cutter; glass plate and tools to trim undisturbed specimens with flat and parallel ends; tools to prepare a remoulded soil specimen such as a spatul

48、a and straight edge; suitable cup to hold remoulded specimens for testing, shall be made of a rigid non-corrodible material, with a base parallel to the rim and at least 50 mm in diameter and 25 mm in depth; equipment as necessary to determine water content. ISO 2017 All rights reserved 3BS EN ISO 1

49、7892-6:2017ISO 17892-6:2017(E)5 Test procedure5.1 Test specimen preparation5.1.1 General5.1.1.1 For the estimation of the undrained shear strength of undisturbed soil, the samples shall be taken with a sampling method that yields undisturbed samples. However, useful index data can be derived from fall cone tests on other samples providing that the moisture content is representative of field conditions and post sampling disturbance is minimized. Regardless, the undisturbed laboratory fall cone estimation correspond