1、BS EN ISO 17892-5:2017Geotechnical investigation andtesting Laboratory testing ofsoilPart 5: Incremental loading oedometer test(ISO 17892-5:2017)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN ISO 17892-5:2017 BRITISH STANDARDNational forewordThis British Stand
2、ard is the UK implementation of EN ISO 17892-5:2017. It partially supersedes BS 1377-5:1990, specifically subclause 3.The UK participation in its preparation was entrusted by Technical Committee B/525, Building and civil engineering structures, to Subcommittee B/526/3, Site investigation and ground
3、testing.A list of organizations represented on this subcommittee 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 2017. Published b
4、y BSI Standards Limited 2017ISBN 978 0 580 87214 3ICS 13.080.20; 93.020Compliance 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 30 April 2017.Amendments/corrigenda issued
5、 since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 17892-5 March 2017 ICS 93.020; 13.080.20 Supersedes CEN ISO/TS 17892-5:2004English Version Geotechnical investigation and testing - Laboratory testing of soil - Part 5: Incremental loading oedometer test (IS
6、O 17892-5:2017) Reconnaissance et essais gotechniques - Essais de laboratoire sur les sols - Partie 5: Essai de chargement par palier loedomtre (ISO 17892-5:2017) Geotechnische Erkundung und Untersuchung - Laborversuche an Bodenproben - Teil 5: Oedometerversuch mit stufenweiser Belastung (ISO 17892-
7、5:2017) This European Standard was approved by CEN on 3 February 2017. 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 and bibliograph
8、ical 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 responsibilit
9、y 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 Republic of
10、 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. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORM
11、ALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 17892-5:2017 EBS EN ISO 17892-5:2017EN ISO 17892-5:2017 (E) 3 Europe
12、an foreword This document (EN ISO 17892-5:2017) has been prepared by Technical Committee CEN/TC 341 “Geotechnical Investigation and Testing”, the secretariat of which is held by BSI, in collaboration with Technical Committee ISO/TC 182 “Geotechnics”. This European Standard shall be given the status
13、of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2017, and conflicting national 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 su
14、bject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes CEN ISO/TS 17892-5:2004. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to im
15、plement this European Standard: 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, Roman
16、ia, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 17892-5:2017 has been approved by CEN as EN ISO 17892-5:2017 without any modification. BS EN ISO 17892-5:2017EN ISO 17892-5:2017 (E)BS EN ISO 17892-5:2017ISO 17892-5:2017(E)F
17、oreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Symbols 25 Equipment . 36 Test procedure 66.1 General . 66.2 Specimen preparation 66.2.1 Selection of preparation method . 66.2.2 Trimming from extruded or block sample 66.2.3 Extrusion from tube of diameter larg
18、er than the oedometer ring 76.2.4 Recompacted specimens . 76.3 Measurement 76.4 Preparation of apparatus . 76.4.1 Assembly of cell 76.4.2 Assembly in load frame 86.5 Loading 86.5.1 Loading sequence 86.5.2 Application of loads . 96.6 Dismantling 97 Test results .107.1 General 107.2 Initial values . 1
19、07.2.1 General. 107.2.2 Initial water content 107.2.3 Initial bulk and dry density . 107.3 Compressibility characteristics . 107.3.1 General. 107.3.2 Specimen height 107.3.3 Vertical strain . 117.3.4 Void ratio . 117.3.5 Compression-stress diagram 128 Test report 128.1 Mandatory reporting 128.2 Opti
20、onal reporting 13Annex A (normative) Calibration, maintenance and checks 14Annex B (informative) Additional calculations 17Bibliography .26 ISO 2017 All rights reserved iiiContents PageBS EN ISO 17892-5:2017ISO 17892-5:2017(E)ForewordISO (the International Organization for Standardization) is a worl
21、dwide 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 represented on
22、 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.The procedures used to develop this d
23、ocument and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular, 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 Dire
24、ctives, Part 2 (see www .iso .org/ directives).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. Details of any patent rights identified during the dev
25、elopment of the document will be in the Introduction and/or on the ISO list of patent declarations received (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 n
26、ature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well 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
27、17892-5 was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 341, Geotechnical 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 (Vienn
28、a Agreement).This first edition cancels and replaces ISO/TS 17892-5:2004, which has been technically revised. It also incorporates the Technical Corrigendum ISO/TS 17892-5:2004/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
29、 ISO 17892-5:2017ISO 17892-5:2017(E)IntroductionThis document covers areas in the international field of geotechnical engineering never previously standardized internationally. It is intended that this document presents broad good practice throughout the world and significant differences with nation
30、al documents is not anticipated. It is based on international practices (see Reference 1). ISO 2017 All rights reserved vBS EN ISO 17892-5:2017BS EN ISO 17892-5:2017Geotechnical investigation and testing Laboratory testing of soil Part 5: Incremental loading oedometer test1 ScopeThis document specif
31、ies methods for the determination of the compressibility characteristics of soils by incremental loading in an oedometer.This document is applicable to the laboratory determination of the compression and deformation characteristics of soil within the scope of geotechnical investigations.The oedomete
32、r test is carried out on a cylindrical test specimen that is confined laterally by a rigid ring. The specimen is subjected to discrete increments of vertical axial loading or unloading and is allowed to drain axially from the top and bottom surfaces. Tests may be carried out on undisturbed, remoulde
33、d, recompacted or reconstituted specimens.The stress paths and drainage conditions in foundations are generally three dimensional and differences can occur in the calculated values of both the magnitude and the rate of settlement.The small size of the specimen generally does not adequately represent
34、 the fabric features present in natural soils.Analysis of consolidation tests is generally based on the assumption that the soil is saturated. In case of unsaturated soils, some of the derived parameters may not be appropriateNOTE This document fulfils the requirements of the determination of the co
35、mpressibility characteristics of soils in the oedometer 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.
36、 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 investigation and testing Identification and classification of soil Part 1: Identification and descriptionISO 1789
37、2-1, Geotechnical investigation and testing Laboratory testing of soil Part 1: Determination 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 s
38、oil Part 3: Determination of particle density3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.INTERNATIONAL STANDARD ISO 17892-5:2017(E) ISO 2017 All rights reserved 1BS EN ISO 17892-5:2017ISO 17892-5:2017(E)ISO and IEC maintain terminological datab
39、ases 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/ obp3.1excess pore pressuredifference between the pore water pressure and the equilibrium pore pressure at
40、 the end of consolidation3.2primary consolidationprocess whereby the void ratio of a specimen decreases as a result of an increase in the effective stress due to a decrease in the excess pore pressure (3.1) under constant total applied loadNote 1 to entry: Time dependent volume change during primary
41、 consolidation is primarily controlled by drainage conditions.3.3secondary compressionprocess in which compression occurs independent from excess pore pressure (3.1) dissipationNote 1 to entry: Time dependant volume change during secondary compression is controlled by factors other than drainage con
42、ditions.3.4swellingexpansion due to reduction of stress or due to increase in water content3.5swelling pressurepressure required to maintain constant volume (i.e. to prevent absorption of water) when a soil is flooded with water.4 SymbolsA cross-sectional area of the specimen (mm2)D mean diameter of
43、 the oedometer ring (mm)dfdeformation gauge reading at the end of a load incrementdideformation gauge reading at the start of a load incrementefvoid ratio of the specimen at the end of a load incremente0initial void ratio of the specimen at the start of the testH mean height of the oedometer ring (m
44、m)Hfheight of the specimen at the end of a load increment (mm)Hiheight of the specimen at the start of a load increment (mm)Hsequivalent height of solids (mm)H0initial height of the specimen at the start of the test (mm)mddry mass of the specimen (g)2 ISO 2017 All rights reservedBS EN ISO 17892-5:20
45、17ISO 17892-5:2017(E)w0initial water content of the specimen (%)v,fvertical strain at the end of an increment, compression being defined as positive strain (%) initial bulk density of the specimen (Mg/m3)dinitial dry density of the specimen (Mg/m3)sparticle density (Mg/m3)vvertical effective stress
46、(kPa)5 EquipmentSee Annex A for calibration requirements for the equipment in this clause.5.1 Oedometer ringThe ring shall be made of corrosion-resistant material and shall have a sharp cutting edge. A ring mounted with a temporary sharp cutting edge may be used.Internal dimensions should conform to
47、 the following: diameter (D): not less than 35 mm; height (H): not less than 12 mm; ratio (D/H): not less than 2,5.The internal surface of the ring shall be smooth and may be lubricated with a thin film of silicone grease, petroleum jelly, or other suitable lubricant.The ring shall either be lateral
48、ly confined to restrict expansion under load, or have sufficient stiffness to prevent the internal diameter expanding by more than 0,05 % when subjected to the maximum horizontal stress resulting from the test.5.2 Porous discsThe top and bottom porous discs shall be of corrosion-resistant material a
49、nd shall allow free drainage of water, while preventing intrusion of soil particles into their pores. The upper and lower surfaces shall be plain, clean and undamaged. The material shall be of negligible compressibility under the maximum stress likely to be applied during the test and shall be strong enough to prevent breakage under load.If necessary, a filter paper may be used to prevent intrusion of the soil into the porous discs. However, the permeability of the discs and the filter paper shall be sufficiently high t
