DIN EN ISO 22476-3-2012 Geotechnical investigation and testing - Field testing - Part 3 Standard penetration test (ISO 22476-3 2005 + Amd 1 2011) German version EN ISO 22476-3 2005.pdf

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1、March 2012 Translation by DIN-Sprachendienst.English price group 11No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS

2、93.020!$z*“1870757www.din.deDDIN EN ISO 22476-3Geotechnical investigation and testing Field testing Part 3: Standard penetration test (ISO 22476-3:2005 + Amd 1:2011)(includes Amendment A1:2011)English translation of DIN EN ISO 22476-3:2012-03Geotechnische Erkundung und Untersuchung Felduntersuchunge

3、n Teil 3: Standard Penetration Test (ISO 22476-3:2005 + Amd 1:2011) Englische bersetzung von DIN EN ISO 22476-3:2012-03Reconnaissance et essais gotechniques Essais en place Partie 3: Essai de pntration au carottier (ISO 22476-3:2005 + Amd 1:2011)(Amendement A1:2011 inclus)Traduction anglaise de DIN

4、EN ISO 22476-3:2012-03SupersedesDIN EN ISO 22476-3:2005-04www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.20(enthlt nderung A1:2011)02.12 DIN EN ISO 22476-3:2012-03 2 A comma is used as the decimal marker. National foreword This st

5、andard has been prepared by Technical Committee CEN/TC 341 “Geotechnical investigation and testing” (Secretariat: ELOT, Greece), Working Group WG 3 “Dynamic probing and standard penetration test” (Secretariat: DIN, Germany), in collaboration with Technical Committee ISO/TC 182 “Geotechnics”. The res

6、ponsible German body involved in its preparation was the Normenausschuss Bauwesen (Building and Civil Engineering Standards Committee), Working Committee NA 005-05-09 AA Baugrund, Feldversuche. This document includes Amendment A1:2011, approved by CEN on 2011-11-14. The start and finish of text intr

7、oduced or altered by amendment is indicated in the text by tags !“. Amendments This standard differs from DIN EN ISO 22476-3:2005-04 as follows: a) Clause 1 has been revised; b) Clause 2 has been revised; c) Clause 4 has been revised; d) Clause 5 has been revised; e) Clause 6 has been revised; f) Cl

8、ause 7 has been revised. Previous editions DIN EN ISO 22476-3: 2005-04 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 22476-3 January 2005 + A1 November 2011 ICS 93.020 English version Geotechnical investigation and testing Field testing Part 3: Standard penetration test (ISO 22476-3:2005

9、+ Amd 1:2011) Reconnaissance et essais gotechniques Essais en place Partie 3: Essai de pntration au carottier (ISO 22476-3:2005 + Amd 1:2011) Geotechnische Erkundung und Untersuchung Felduntersuchungen Teil 3: Standard Penetration Test (ISO 22476-3:2005 + Amd 1:2011) EN ISO 22476-3:2005 was approved

10、 by CEN on 2004-11-04 and Amendment A1:2011 on 2011-11-14. 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 referen

11、ces concerning such national standards may be obtained on application to the Management Centre or to any CEN member. The European Standards exist in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into it

12、s own language and notified to the 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvi

13、a, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussel

14、s 2011 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 + A1:2011 EContents DIN EN ISO 22476-3:2012-03 EN ISO 22476-3:2005 + A1:2011 (E) 2 Page 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Equipme

15、nt 5 5 Test Procedure.7 6 Test results.9 7 Reporting 9 Annex A (informative) Correction factors 12 A.1 Energy delivered to the drive rods.1A.2 Energy losses due to the length of rods .1 A.3 Other correction factors12 A.4 Effect of overburden pressure in sands13 A.5 Use of the correction factors13 An

16、nex B (informative) Recommended method to measure the actual energy 15 B.1 Principle15 B.2 Equipment 15 B.3 Measurements15 B.4 Calculation16 Bibliography 1 2 28Foreword to EN ISO 22476-3:2005 3Foreword to EN ISO 22476-3:2005/A1:2011 .3 Foreword to EN ISO 22476-3:2005 This document (EN ISO 22476-3:20

17、05) has been prepared by Technical Committee CEN/TC 341 “Geotechnical investigation and testing”, the secretariat of which is held by DIN, in collaboration with Technical Committee ISO/TC 182 “Geotechnics”. This European Standard shall be given the status of a national standard, either by publicatio

18、n of an identical text or by endorsement, at the latest by July 2005, and conflicting national standards shall be withdrawn at the latest by July 2005. EN ISO 22476 Geotechnical investigation and testing Field testing has the following parts: Part 1: Electrical cone and piezocone penetration tests P

19、art 2: Dynamic probing Part 3: Standard penetration test Part 4: Menard pressuremeter test Part 5: Flexible dilatometer test Part 6: Self-boring pressuremeter test Part 7: Borehole jack test Part 8: Full displacement pressuremeter test Part 9: Field vane test Part 10: Weight sounding test Part 11: F

20、lat dilatometer test Part 12: Lefranc permeability test Part 13: Water pressure tests in rock Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerl

21、and and United Kingdom. Foreword to EN ISO 22476-3:2005/A1:2011 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 “Ge

22、otechnics”. 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 so

23、me 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 imp

24、lement 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, S

25、witzerland and the United Kingdom. DIN EN ISO 22476-3:2012-03 EN ISO 22476-3:2005 + A1:2011 (E) 3 According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic

26、, ,1 Scope The standard penetration test aims to determine the resistance of soils at the base of a borehole to the dynamic penetration of a split barrel sampler and the recovering of disturbed samples for identification purposes (SPT). In gravelly soils and in soft rocks a solid cone is also be use

27、d (SPT(C). The standard penetration test is used mainly to assess the strength and deformation parameters of cohesionless soils, but some valuable data may also be obtained in other soil types. The basis of the test consists in driving a sampler by dropping a hammer of 63,5 kg mass on to an anvil or

28、 drive head from a height of 760 mm. The number of blows (N) necessary to achieve a penetration of the sampler of 300 mm (after its penetration under gravity and below a seating drive) is the penetration resistance. 2 Normative references The following referenced documents are indispensable for the

29、application 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. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 anvi

30、l or drive head that portion of the drive-weight assembly that the hammer strikes and through which the hammer energy passes into the drive rods 3.2 hammer portion of the drive-weight assembly consisting of the 63,5 kg impact weight which is successively lifted and dropped to provide the energy that

31、 accomplishes the penetration and sampling 3.3 height of fall free fall of the hammer after being released 3.4 drive-weight assembly device consisting of the hammer, the hammer fall guide, the anvil and the drop system 3.5 drive rods rods that connect the drive-weight assembly to the sampler !ISO 22

32、475-1:2006, Geotechnical investigation and testing Sampling methods and groundwater measurements Part 1: Technical principles for execution“ !This part of ISO 22476 deals with the equipment requirements for, execution of and reporting on the standard penetration test to complement direct investigati

33、ons (e.g. ISO 22475-1). NOTE This part of ISO 22476 fulfils the requirements for standard penetration testing as part of geotechnical investigation and testing in accordance with EN 1997-1 and EN 1997-2.“ DIN EN ISO 22476-3:2012-03 EN ISO 22476-3:2005 + A1:2011 (E) 4 3.7 theoretical energy Etheorene

34、rgy as calculated for the drive weight assembly: Etheor= m g h where m is the mass of the hammer; g is the acceleration due to gravity; h is the falling height of the hammer. 3.8 energy ratio Er ratio of the actual energy Emeasand the theoretical energy Etheorof the hammer expressed in percentage 3.

35、9 N-value number of blows required to drive the sampler for a test drive of 300 mm following the seating drive 4 Equipment 4.1 Drilling equipment The drilling equipment shall be capable of providing a clean hole to ensure that the penetration test is performed on essentially undisturbed soil. The ar

36、ea that is exposed in the base of the borehole prior to testing can influence the results and consequently the borehole diameter shall always be reported. A significant effect on the result can begin to occur when the diameter is 150 mm or more. 4.2 Sampler The steel split barrel sampler shall have

37、the dimensions indicated in Figure 1 and shall be provided with a non-return valve with sufficient clearance to permit the free flow of water or mud during driving. The inner diameter of the sampler can be up to 3 mm larger than that of the shoe to allow for a liner. In gravelly sand, a solid 60cone

38、 instead of the standard shoe can be used. In this case the test shall be noted as SPT(C). 3.6 actual energy Emeasenergy delivered by the drive-weight assembly into the drive rod, immediately below the anvil, as measured DIN EN ISO 22476-3:2012-03 EN ISO 22476-3:2005 + A1:2011 (E) 5 4.3 Drive rods T

39、he drive rods shall have a stiffness that prevents buckling during driving. !The rod stiffness should be at least 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.“ Rods with a mass of more than 10

40、,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. !The straightness shall be checked by a

41、pplying one of the following procedures. Holding the rod vertically and rotating it. If the rod appears to wobble, the straightness is not acceptable. Rolling the rod on a plane surface. If the rod appears to wobble, the straightness is not acceptable. Sliding a straight hollow tube which is slightl

42、y longer than the rod over the rod. If the rod can pass through the tube without jamming, the straightness is acceptable.“ 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 di

43、ameter 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) !At greater depth and/or with greater borehole diameters, the vertical alignment of the rod string should be ensured by installing appropriate stabilizers

44、. Also, a stabilizer should be used at the collar at the top of the borehole. Type and number of stabilizers shall be reported.“ 4.4 Drive weight assembly The drive weight assembly, of an overall mass not exceeding 115 kg, shall comprise: a steel hammer of 63,5 kg 0,5 kg conveniently guided to ensur

45、e minimal resistance during the drop; an automatic release mechanism which will ensure a constant free fall of (760 10) mm, a negligible speed of the hammer when released, and no induced parasitic movements in the drive rods; a steel drive head or anvil rigidly connected to the top of the drive rods

46、. It may be an internal part of the assembly, as with safety hammers. DIN EN ISO 22476-3:2012-03 EN ISO 22476-3:2005 + A1:2011 (E) 6 4.5 Optional equipment 4.5.1 Blow counter A device to measure mechanical or electric impulses can be placed on the system in order to count the number of the blows of

47、hammer. 4.5.2 Penetration length measuring device The penetration length is measured either by counting on a scale on the rods or by recording sensors. In this latter case, resolution shall be less than 1/100 of the measured length. 5 Test Procedure 5.1 Equipment checks and calibration At the test s

48、ite, the height of fall, the friction free fall of the hammer, the proper condition of the anvil and the mechanical release devices shall be checked for satisfactory operation which is to be ensured for the whole test series. In addition, the proper functioning of the recording device shall be checked when automatic recording equipment is used. The precision of the measuring instruments if applicable shall be checked after any damage, overloading or repair but at least once