Geotechnical investigation and testing - Laboratory testing of soil - Part 6: Fall cone test (ISO 17892-6:2017)

This document specifies the laboratory determination of undrained shear strength of both undisturbed and remoulded specimen of saturated fine grained cohesive soils by use of a fall-cone.
This document specifies the fall-cone test, in which a cone is allowed to fall with its tip towards a soil specimen, whereupon the penetration of the cone into the soil is measured. Tests performed according to this test yield penetration values which can be used to estimate the undrained shear strength. The test is applicable to both undisturbed and remoulded soil test specimen.

Geotechnische Erkundung und Untersuchung - Laborversuche an Bodenproben - Teil 6: Fallkegelversuch (ISO 17892-6:2017)

Reconnaissance et essais géotechniques - Essais de laboratoire sur les sols - Partie 6: Essai de pénétration de cône (ISO 17892-6:2017)

La présente Norme internationale spécifie une méthode d'estimation de la résistance au cisaillement non drainé d'éprouvettes de sols fins remaniés ou non remaniés à l'aide de l'essai de pénétration de cône.
La présente Norme internationale est applicable à l'estimation de laboratoire de la résistance au cisaillement non drainé d'une éprouvette d'essai de sol dans le domaine d'application de la reconnaissance géotechnique.
Lors de l'essai de pénétration de cône, un cône est lâché, extrémité vers le bas, sur une éprouvette de sol afin de mesurer sa profondeur de pénétration dans le sol. Les valeurs de profondeur de pénétration sont utilisées pour évaluer la résistance au cisaillement non drainé. L'essai de pénétration de cône produit un cisaillement complexe dans l'éprouvette d'essai et ne simule pas une compression verticale ni un essai de cisaillement horizontal.
Dans le cas d'éprouvettes d'essai de sol non remanié, les résultats dépendent de la qualité des éprouvettes. De plus, le degré de saturation de l'éprouvette d'essai peut ne pas être identique au sol sur site, ce qui donne un résultat différent.
L'essai étant réalisé sur une petite éprouvette de laboratoire, le résultat peut différer de celui des essais en laboratoire sur de plus grandes éprouvettes. En outre, l'éprouvette d'essai peut ne pas être totalement représentative du sol dans son état naturel sur le terrain. Elle peut par exemple ne pas posséder de fissures présentes sur site à un plus grand espacement qu'à l'échelle de l'éprouvette.
Pour les raisons susmentionnées, il convient de considérer l'essai comme une estimation et non comme une mesure exacte de la résistance au cisaillement non drainé.
Le rapport entre la résistance au cisaillement remanié et la résistance au cisaillement non remanié peut être utilisé pour estimer la sensibilité d'une éprouvette de sol. Variable en fonction du temps, la mesure de la résistance au cisaillement peut être utilisée pour évaluer la restructuration thixotropique de la résistance d'une éprouvette de sol remanié.
NOTE Le présent document satisfait aux exigences de l'essai de référence de résistance sur les sols pour la reconnaissance et les essais géotechniques conformément à l'EN 1997‑1 et à l'EN 1997‑2.

Geotehnično preiskovanje in preskušanje - Laboratorijsko preskušanje zemljin - 6. del: Preskus s konusom (ISO 17892-6:2017)

Ta dokument opredeljuje laboratorijsko določanje nedrenirane strižne trdnosti neporušenih in pregnetenih vzorcev nasičenih drobnozrnatih kohezivnih zemljin s konusom.
Ta dokument določa preskus s konusom, pri katerem je dovoljeno, da stožec pade s konico proti vzorcu zemljine, pri čemer se izmeri penetracija stožca v zemljino. Preskusi, izvedeni v skladu s tem preskusom, ponujajo penetracijske vrednosti, ki jih je mogoče uporabiti za oceno nedrenirane strižne trdnosti. Preskus se uporablja za neporušene in pregnetene preskusne vzorce zemljin.

General Information

Status
Published
Public Enquiry End Date
30-Mar-2015
Publication Date
15-Aug-2017
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
25-Apr-2017
Due Date
30-Jun-2017
Completion Date
16-Aug-2017

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SLOVENSKI STANDARD
SIST EN ISO 17892-6:2017
01-september-2017
1DGRPHãþD
SIST-TS CEN ISO/TS 17892-6:2004
SIST-TS CEN ISO/TS 17892-6:2004/AC:2010

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GHO3UHVNXVVNRQXVRP ,62

Geotechnical investigation and testing - Laboratory testing of soil - Part 6: Fall cone test

(ISO 17892-6:2017)

Geotechnische Erkundung und Untersuchung - Laborversuche an Bodenproben - Teil 6:

Fallkegelversuch (ISO 17892-6:2017)

Reconnaissance et essais géotechniques - Essais de laboratoire sur les sols - Partie 6:

Essai de pénétration de cône (ISO 17892-6:2017)
Ta slovenski standard je istoveten z: EN ISO 17892-6:2017
ICS:
13.080.20 Fizikalne lastnosti tal Physical properties of soils
93.020 Zemeljska dela. Izkopavanja. Earthworks. Excavations.
Gradnja temeljev. Dela pod Foundation construction.
zemljo Underground works
SIST EN ISO 17892-6:2017 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 17892-6:2017
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SIST EN ISO 17892-6:2017
EN ISO 17892-6
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2017
EUROPÄISCHE NORM
ICS 93.020; 13.080.20 Supersedes CEN ISO/TS 17892-6:2004
English Version
Geotechnical investigation and testing - Laboratory testing
of soil - Part 6: Fall cone test (ISO 17892-6:2017)

Reconnaissance et essais géotechniques - Essais de Geotechnische Erkundung und Untersuchung -

laboratoire sur les sols - Partie 6: Essai de pénétration Laborversuche an Bodenproben - Teil 6:

de cône (ISO 17892-6:2017) 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 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 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 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 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR 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 Ref. No. EN ISO 17892-6:2017 E

worldwide for CEN national Members.
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SIST EN ISO 17892-6:2017
EN ISO 17892-6:2017 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 17892-6:2017
EN ISO 17892-6:2017 (E)
European foreword
This document (EN ISO 17892-6:2017) 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 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 subject 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 17892-6:2004.

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 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 the United Kingdom.
Endorsement notice

The text of ISO 17892-6:2017 has been approved by CEN as EN ISO 17892-6:2017 without any

modification.
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SIST EN ISO 17892-6:2017
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SIST EN ISO 17892-6:2017
INTERNATIONAL ISO
STANDARD 17892-6
First edition
2017-02
Geotechnical investigation and
testing — Laboratory testing of soil —
Part 6:
Fall cone test
Reconnaissance et essais géotechniques — Essais de laboratoire sur
les sols —
Partie 6: Essai de pénétration de cône
Reference number
ISO 17892-6:2017(E)
ISO 2017
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SIST EN ISO 17892-6:2017
ISO 17892-6:2017(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form

or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior

written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of

the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
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SIST EN ISO 17892-6:2017
ISO 17892-6:2017(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Equipment ................................................................................................................................................................................................................... 2

5 Test procedure ........................................................................................................................................................................................................ 4

5.1 Test specimen preparation ........................................................................................................................................................... 4

5.2 Test points ................................................................................................................................................................................................... 5

5.3 Determination of fall cone penetration ............................................................................................................................. 5

6 Test results .................................................................................................................................................................................................................. 7

6.1 Average penetration ........................................................................................................................................................................... 7

6.2 Estimated undrained fall cone shear strength ......... .................................................................................................... 7

6.3 Additional estimate of undrained fall cone shear strength .............................................................................. 7

7 Test report ................................................................................................................................................................................................................... 7

7.1 Mandatory reporting ......................................................................................................................................................................... 7

7.2 Optional reporting ............................................................................................................................................................................... 8

Annex A (normative) Calibration, maintenance and checks ....................................................................................................... 9

Bibliography .............................................................................................................................................................................................................................11

© ISO 2017 – All rights reserved iii
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SIST EN ISO 17892-6:2017
ISO 17892-6:2017(E)
Foreword

ISO (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

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

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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 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 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 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 (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 well as information about ISO’s adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following

URL: w w w . i s o .org/ iso/ foreword .html.

ISO 17892-6 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 (Vienna Agreement).

This first edition cancels and replaces ISO/TS 17892-6:2004, which has been technically revised. 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 reserved
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SIST EN ISO 17892-6:2017
ISO 17892-6:2017(E)
Introduction

This document covers areas in the 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 national documents is not anticipated. It is based on international

practice (see Reference [1]).
© ISO 2017 – All rights reserved v
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SIST EN ISO 17892-6:2017
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SIST EN ISO 17892-6:2017
INTERNATIONAL STANDARD ISO 17892-6:2017(E)
Geotechnical investigation and testing — Laboratory
testing of soil —
Part 6:
Fall cone test
1 Scope

This 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 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 measured. 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 of 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 in 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 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 index testing of soils for geotechnical

investigation and testing in accordance with EN 1997–1 and EN 1997–2.
2 Normative references

The 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 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 description

ISO 17892-1, Geotechnical investigation and testing — Laboratory testing of soil — Part 1: Determination

of water content
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
© ISO 2017 – All rights reserved 1
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SIST EN ISO 17892-6:2017
ISO 17892-6:2017(E)

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
3.1
fall cone undrained shear strength of undisturbed soil
ufc

undrained shear strength of an undisturbed fine grained soil specimen estimated by the fall cone method

3.2
fall cone undrained shear strength of remoulded soil
urfc

undrained shear strength of a remoulded fine grained soil specimen estimated by the fall cone method

4 Equipment
See Annex A for calibration requirements for the equipment in this clause.
4.1 Cone apparatus

The 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 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
...

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