BS EN ISO 22476-3-2005 + A1-2011 (2012)

BRITISH STANDARD BS EN ISO 22476-3:2005 Geotechnical investigation and testing — Field testing — Part 3: Standard penetration test ICS 93.020+A1:2011 Incorporating corrigendum February 2007 National foreword This British Standard is the UK implementation of EN ISO 22476-3:2005+A1:2011. It is identical to ISO 22476-3:2005, incorporating amendment 1:2011. It supersedes BS EN ISO 22476-3:2005, which is withdrawn. The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to ISO text carry the number of the ISO amendment. For example, text altered by ISO amendment 1 is indicated by !“. The UK participation in its preparation was entrusted by Technical Committee B/526, Geotechnics, to Subcommittee B/526/3, Site investigation and ground testing. A list of organizations represented on this Subcommittee can be obtained on request to its secretary. The test in this standard is included in BS 1377-9:1990 (subclause 3.3) which is now withdrawn. Its use is covered in BS 5930:1999, clause 25.2, where there is reference to BS 1377-9:1990, clause 3.3. BS EN ISO 22476-3:2005+A1:2011 should now be used instead. It should be noted that the new test method requires a calibration of the equipment for energy ratio (ratio of the actual energy to the theoretical energy of the hammer). This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. BS EN ISO 22476-3:2005+A1:2011 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 January 2006 The British Standards Institution 2012 Amendments/corrigenda issued since publication Amd. No. Date Comments 16931 Corrigendum No. 1 28 February 2007 Revision of National foreword 31 January 2012 Implementation of ISO amendment 1:2011 with CEN endorsement A1:2011 ISBN 978 0 580 74914 8EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN ISO 22476-3:2005+A1 ICS 93.020 English version Geotechnical investigation and testing - Field testing - Part 3: Standard penetration test (ISO 22476-3:2005) Reconnaissance et essais géotechniques - Essais en place - Partie 3 : Essais de pénétration au carottier (ISO 22476- 3:2005) Geotechnische Erkundung und Untersuchung - Felduntersuchungen - Teil 3: Standard penetration test (ISO 22476-3:2005) This European Standard was approved by CEN on 4 November 2004. 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 bibliographical references concerning such national standards may be obtained on application to the Central Secretariat 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 Central Secretariat has the same status as the official versions . CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels © 2005 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members . Ref. No. EN ISO 22476-3:2005: E November 2011Foreword This document (EN ISO 22476-3:2005) has been prepared by Technical C ommittee CEN/TC3 41 “Geotechnical investigation a nd t esting”, the secretariat ofw hich i s held b y DIN, in c ollaboration with Technical C ommittee 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 July2 005, and conflicting national standards shall be withdrawn at the latest by July 2005. EN ISO 22476 Geotechnical investigation and testing -F ield testing has the following parts:  Part 1: Electrical cone and piezocone penetration tests  Part 2: Dynamic probing  Part 3: Standard penetration tes t  Part 4:M enard pressuremeter test  Part 5: Flexible dilatometer test  Part 6: Self-boring pressuremeter test  Part 7: Borehole jack test  Part 8: Full displacement pressuremeter tes t  Part 9: Field vane test  Part 10: Weight sounding test  Part 11: Flat dilatometer test  Part 12: Lefranc permeability test  Part 13: Water pressure tests in rock According to the CEN/CENELEC I nternal Regulations, the national standards o rganizations o f the following countries are bound to implement this European Standard : Austria, Belgium, Cyprus, Czech Republic, Denmark , Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,L atvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. BS EN ISO 22476-3:2005+A1:2011 EN ISO 22476-3:2005+A1:2011 (E)Foreword to amen A1 This document (EN ISO 22476-3:2005/A1:2011) 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 Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2012, and conflicting national standards shall be withdrawn at the latest by May 2012. 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. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. ment d BS EN ISO 22476-3:2005+A1:2011 EN ISO 22476-3:2005+A1:2011 (E)This page deliberately set blank BS EN ISO 22476-3:2005+A1:2011 EN ISO 22476-3:2005+A1:2011 (E)Reference number ISO 22476-3:2005(E) INTERNATIONAL STANDARD ISO 22476-3 First edition 2005-01-15 Geotechnical investigation and testing — Field testing — Part 3: Standard penetration test Reconnaissance et essais géotechniques — Essais en place — Partie 3: Essai de pénétration au carottier BS EN ISO 22476-3:2005+A1:2011 EN ISO 22476-3:2005+A1:2011 (E)ii BS EN ISO 22476-3:2005+A1:2011 EN ISO 22476-3:2005+A1:2011 (E)Contents page 1 Scope 1 2N ormative references 1 3T erms and definitions . 1 4E quipment 2 5T est Procedure. 4 6T est results. 5 7R eporting 5 Annex A (informat ive) Correction factors . . 8 A.1E nergyd elivered to the drive rods.8 A.2E nergyl osses due to the length of rods . 8 A.3O ther correction factors. . 8 A.4E ffect of overburden pressure in sands. . 9 A.5U se of the correction factors 9 Annex B (informat ive) Recommended method to measure the actual energy 11 B.1 Principle 1 1 B.2 Equipment 1 1 B.3 Measurements1 1 B.4 Calculation 1 2 Bibliography 1 4 iii Foreword i v BS EN ISO 22476-3:2005+A1:2011 EN ISO 22476-3:2005+A1:2011 (E)Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO m ember b odies). T he work o f preparing I nternational Standards is n ormally carried o ut t hrough ISO technical committees. Each member bodyi nterested 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 l iaison with I SO, also t ake part in the work. ISO c ollaborates c losely with the International Electrotechnical Commission (IEC) on allm atters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2 . The main task o f technical c ommittees i s to prepare International S tandards. Draft International Standards adopted by t he technical c ommittees a re c irculated t o the member b odies f or v oting. P ublication as an International 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 pa tent rights. ISO 22476-3 was p repared b y the European Committee for Standardization (CEN) i n collaboration with Technical Committee ISO/TC1 82, Geotechnics , Subcommittee SC 1, Geotechnical investigation and testing, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement) . ISO 22476 consists o f the f ollowing parts, under t he general title Geotechnical i nvestigation and testing — Field testing: — Part 1: Electrical cone and piezocone penetration tests — Part 2: Dynamic probing — Part 3: Standard penetration tes t — Part4 : Menard pressuremeter tes t — Part 5: Flexible dilatometer tes t — Part 6: Self-boring pressuremeter tes t —P art 7: Borehole jack test —P art 8: Full displacement pressuremeter tes t — Part 9: Field vane test — Part 10: Weight sounding test — Part 11: Flat dilatometer test —P art 12: Lefranc permeability test — Part 13: Water pressure test in rock — Part 14: Pumping tests iv BS EN ISO 22476-3:2005+A1:2011 EN ISO 22476-3:2005+A1:2011 (E)1 1 Scope Thes tandardp enetration test aimst o determine the resistanceo fs oils at the base of a borehole to the dynamic penetration of a split barrels ampler and the recoveringo fd isturbed samples for identification purposes( SPT).I n gravelly soils and in soft rocksa solid cone is alsob e used (SPT(C)). Thes tandardp enetrationt esti su sed mainlyt oa ssess the strength andd eformation parameterso fc ohesionless soils,b ut some valuable data maya lsob eo btained in other soil types. Theb asis of the test consists in driving a sampler by droppinga hammero f6 3,5 kg mass on to an anvilo rd rive head from a height of 760 mm. Then umber of blows ( N ) necessary to achieve a penetration of the sampler of 300 mm (after its penetration under gravitya nd below a seating drive) is the penetration resistance. 2 Normative references Thef ollowing referenced documents are indispensable fort he application oft hisd ocument. Ford ated references , onlyt he edition citeda pplies. For undated references,t he lateste dition of the referenced document (includinga ny amendments)a pplies . 3 Terms and definitions For the purposes of this document, t he following termsa nd definitions apply. 3.1 anvil or driveh ead thatp ortion of the drive-weight assembly that the hammer strikes and through which the hammere nergy passesi nto the drive rods 3.2 hammer portiono ft he drive-weight assembly consisting of the6 3,5 kgi mpact weight whichi ss uccessively lifted and dropped to provide the energyt hat accomplishes the penetration and sampling 3.3 height of fall free fall of the hammer after beingr eleased 3.4 drive-weight assembly device consisting of theh ammer,t he hammer fall guide, the anvil and the drop system 3.5 driver ods rods that connectt he drive-weighta ssembly to thes ampler 3.6 actual energy E meas energy delivered by thed rive-weight assembly intot he drive rod, immediately below the anvil, as measured BS EN ISO 22476-3:2005+A1:2011 EN ISO 22476-3:2005+A1:2011 (E) This part of ISO 22476 deals with the equipment requirements for, execution of and reporting on the penetration test to complement direct investigations (e.g. ISO 22475-1). NOTE This part of ISO 22476 fulfils the requirements for standard penetration testing as part of geotechnical and testing in accordance with EN 1997-1 and EN 1997-2.! “ ISO 22475-1:2006, Geotechnical investigation and testing — Sampling methods and groundwater — Part 1: Technical principles for execution ! “ standard investigation measurements2 3.7 theoretical energy E theor energy as calculated fort he drive weight assembly: E theor= m × g × h where m is the mass of the hammer; g is the accelerationd ue to gravity; h is the falling height of the hammer. 3.8 energyr atio E r ratioo ft he actual energy E meas and thet heoretical energy E theor of the hammere xpressed in percentage 3.9 N -value number of blows required to drive the sampler fora test drive of 300 mm following thes eating drive 4 Equipment 4.1 Drilling equipment Thed rilling equipment shall be capable of providing ac lean holet oe nsuret hatt he penetrationt esti sp erformed on essentiallyu ndisturbeds oil. Thea reat hat is exposed int he base oft he borehole prior to testing cani nfluence the resultsa nd consequentlyt he borehole diameter shall always be reported. A significant effect on the result canb egin to occurw hen the diameter is 150 mm or more. 4.2 Sampler Thes teel split barrels ampler shallh ave the dimensions indicated in Figure1 and shallb e providedw itha non- returnv alve with sufficient clearancet op ermitt he free flow of water or mudd uringd riving. Thei nner diameter of the sampler canb eu pt o 3 mm larger than that of the shoe to allowf or a liner.I n gravelly sand,as olid 60° cone insteadoft he standards hoec an be used. In this caset he test shallben oted as SPT(C). BS EN ISO 22476-3:2005+A1:2011 EN ISO 22476-3:2005+A1:2011 (E)3 Key 1 Drive shoe 2 Split barrel 3 Coupling 4 Non return valve (ball diameter: recommended 25 mm; ball seating: recommended 22 mm) 5 Ball retaining pins 6 Four vent holes (min diameter 12 mm) x Length of the drive shoe Figure 1 — Longitudinal cross section of an SPT sampler without a provision for a liner (dimensions in mm) 4.3 Drive rods The drive rods shall have a stiffness that prevents buckling during driving. Rods with a mass of more than 10,0 kg/m shall not be used. Only straight rods shall be used and periodic checks shall be made on site, including connections between consecutive rods. When measured over the whole length of each rod the relative deflection shall not be greater than 1 in 1 200. BS EN ISO 22476-3:2005+A1:2011 EN ISO 22476-3:2005+A1:2011 (E) that of an AW rod for tests less than 20 m depth, and of a BW rod for greater depth. For definitions of AW and BW rods, see ISO 22475-1:2006, Table C.1. The rod stiffness should be at least ! “ The straightness shall be checked by applyi