Geotechnical investigation and testing - Field testing - Part 8: Full displacement pressuremeter test (ISO 22476-8:2018)

This document comprises requirements for investigations of soil and weak rock by pressuremeter tests with the full displacement pressuremeter (FDP) as part of the geotechnical investigation services according to EN 1997-1 and EN 1997-2.
Tests with the full displacement pressuremeter cover the measurement in situ of the deformation of soils and weak rocks by the expansion/contraction of a cylindrical flexible membrane under pressure.
The FDP is jacked into the ground with an integral cone at its lower end thereby creating its own test hole.
FDP equipment may take a number of forms therefore descriptions are given in accordance with the type of installation and measuring systems

Geotechnische Erkundung und Untersuchung - Felduntersuchungen - Teil 8: Vollverdrängungspressiometerversuch (ISO 22476-8:2018)

Dieses Dokument legt die Geräteanforderungen, die Durchführung und die Ergebnisdarstellung von Versuchen mit dem Verdrängungspressiometer (en: full displacement pressuremeter, FDP) fest.
ANMERKUNG   Dieses Dokument erfüllt die Anforderungen an den Versuch mit dem Verdrängungspressiometer als Teil der geotechnischen Erkundung nach EN 1997 1 und EN 1997 2.
Versuche mit dem Verdrängungspressiometer umfassen die Messung der Verformung von Böden und weichem Fels in situ anhand der Aufweitung und Kontraktion einer flexiblen zylindrischen Membran unter Druck.

Reconnaissance et essais géotechniques - Essais en place - Partie 8: Essai au pressiomètre refoulant (ISO 22476-8:2018)

Le présent document spécifie les exigences relatives à l'appareillage, à l'exécution et au compte rendu des essais au pressiomètre refoulant (FDP).
NOTE       Ce document satisfait aux exigences relatives aux essais au pressiomètre refoulant dans le cadre des services de reconnaissance géotechnique selon les normes EN 1997‑1 et EN 1997‑2.
Les essais au pressiomètre refoulant couvre la mesure in situ la déformation d'un sol ou d'une roche tendre produite par l'expansion/la contraction d'une sonde cylindrique à membrane souple sous l'effet de la pression.

Geotehnično preiskovanje in preskušanje - Preskušanje na terenu - 8. del: Preskus z vtiskovanim presiometrom (ISO 22476-8:2018)

Ta dokument zajema zahteve za preiskovanje zemljine in šibkih kamnin s preskusi z vtiskovanim presiometrom (FDP) kot del storitev geotehničnega preiskovanja v skladu s standardoma EN 1997-1 in EN 1997-2. Preskusi z vtiskovanim presiometrom zajemajo meritve deformacije zemljin in šibkih kamnin na kraju samem s širjenjem in krčenjem valjaste fleksibilne membrane pod tlakom. Vtiskovani presiometer se vtisne v tla z vgrajenim stožcem na spodnji strani in tako ustvari lastno preskusno luknjo. Oprema vtiskovanega presiometra je lahko v številnih različnih oblikah, zato so opisi podani v skladu z vrsto namestitve in sistemi merjenja.

General Information

Status
Published
Public Enquiry End Date
14-Oct-2017
Publication Date
21-Nov-2018
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
05-Nov-2018
Due Date
10-Jan-2019
Completion Date
22-Nov-2018

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SLOVENSKI STANDARD
SIST EN ISO 22476-8:2018
01-december-2018

*HRWHKQLþQRSUHLVNRYDQMHLQSUHVNXãDQMH3UHVNXãDQMHQDWHUHQXGHO3UHVNXV

]YWLVNRYDQLPSUHVLRPHWURP ,62

Geotechnical investigation and testing - Field testing - Part 8: Full displacement

pressuremeter test (ISO 22476-8:2018)
Geotechnische Erkundung und Untersuchung - Felduntersuchungen - Teil 8:
Vollverdrängungspressiometerversuch (ISO 22476-8:2018)
Reconnaissance et essais géotechniques - Essais en place - Partie 8: Essai au
pressiomètre refoulant (ISO 22476-8:2018)
Ta slovenski standard je istoveten z: EN ISO 22476-8:2018
ICS:
93.020 Zemeljska dela. Izkopavanja. Earthworks. Excavations.
Gradnja temeljev. Dela pod Foundation construction.
zemljo Underground works
SIST EN ISO 22476-8:2018 en

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

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SIST EN ISO 22476-8:2018
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SIST EN ISO 22476-8:2018
EN ISO 22476-8
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2018
EUROPÄISCHE NORM
ICS 93.020
English Version
Geotechnical investigation and testing - Field testing - Part
8: Full displacement pressuremeter test (ISO 22476-
8:2018)

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

place - Partie 8: Essai au pressiomètre refoulant (ISO Felduntersuchungen - Teil 8:

22476-8:2018) Vollverdrängungspressiometerversuch (ISO 22476-
8:2018)
This European Standard was approved by CEN on 1 October 2018.

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: Rue de la Science 23, B-1040 Brussels

© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 22476-8:2018 E

worldwide for CEN national Members.
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SIST EN ISO 22476-8:2018
EN ISO 22476-8:2018 (E)
Contents Page

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

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SIST EN ISO 22476-8:2018
EN ISO 22476-8:2018 (E)
European foreword

This document (EN ISO 22476-8:2018) has been prepared by Technical Committee ISO/TC 182

"Geotechnics" in collaboration with Technical Committee CEN/TC 341 “Geotechnical Investigation and

Testing” the secretariat of which is held by BSI.

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 April 2019, and conflicting national standards shall be

withdrawn at the latest by April 2019.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN 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, 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 22476-8:2018 has been approved by CEN as EN ISO 22476-8:2018 without any

modification.
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SIST EN ISO 22476-8:2018
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SIST EN ISO 22476-8:2018
INTERNATIONAL ISO
STANDARD 22476-8
First edition
2018-09
Geotechnical investigation and
testing — Field testing —
Part 8:
Full displacement pressuremeter test
Reconnaissance et essais géotechniques — Essais en place —
Partie 8: Essai au pressiomètre refoulant
Reference number
ISO 22476-8:2018(E)
ISO 2018
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SIST EN ISO 22476-8:2018
ISO 22476-8:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018

All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
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SIST EN ISO 22476-8:2018
ISO 22476-8:2018(E)
Contents Page

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

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

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

3 Terms, definitions and symbols ............................................................................................................................................................ 1

3.1 Terms and definitions ....................................................................................................................................................................... 1

3.2 Symbols ......................................................................................................................................................................................................... 7

4 Equipment ................................................................................................................................................................................................................... 8

4.1 General ........................................................................................................................................................................................................... 8

4.2 Cone module ............................................................................................................................................................................................. 8

4.3 Pressuremeter module ..................................................................................................................................................................... 9

4.4 Measuring system ................................................................................................................................................................................. 9

5 Test procedure ........................................................................................................................................................................................................ 9

5.1 Selection of equipment and procedures ........................................................................................................................... 9

5.2 Preparation .............................................................................................................................................................................................10

5.3 Installation ...............................................................................................................................................................................................10

5.4 Pressuremeter test ...........................................................................................................................................................................11

5.4.1 General...................................................................................................................................................................................11

5.4.2 Optional test stages ....................................................................................................................................................11

5.4.3 Frequency of logging parameters ...................................................................................................................11

5.5 Test completion ...................................................................................................................................................................................11

6 Test results ...............................................................................................................................................................................................................11

7 Report ...........................................................................................................................................................................................................................12

Annex A (informative) Uncertainties in pressuremeter testing ...........................................................................................14

Annex B (normative) Calibrations .......................................................................................................................................................................15

Annex C (normative) Corrections on the volume .................................................................................................................................16

Annex D (normative) Corrections on the pressure ............................................................................................................................19

Annex E (informative) Strain conversions ...................................................................................................................................................20

Bibliography .............................................................................................................................................................................................................................21

© ISO 2018 – All rights reserved iii
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SIST EN ISO 22476-8:2018
ISO 22476-8:2018(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

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 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: www .iso .org/iso/foreword .html.

This document 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).
A list of all parts in the ISO 22476 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2018 – All rights reserved
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SIST EN ISO 22476-8:2018
INTERNATIONAL STANDARD ISO 22476-8:2018(E)
Geotechnical investigation and testing — Field testing —
Part 8:
Full displacement pressuremeter test
1 Scope

This document specifies the equipment requirements, execution of and reporting on full displacement

pressuremeter (FDP) tests.

NOTE This document fulfils the requirements for full displacement pressurementer test as part of the

geotechnical investigation services according to EN 1997-1 and EN 1997-2.

Tests with the full displacement pressuremeter cover the measurement in situ of the deformation of

soils and weak rocks by the expansion/contraction of a cylindrical flexible membrane under pressure.

2 Normative references

The following documents are referred to in the 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 22476-1, Geotechnical investigation and testing — Field testing — Part 1: Electrical cone and piezocone

penetration test

ISO 22476-4:2012, Geotechnical investigation and testing — Field testing — Part 4: Ménard

pressuremeter test

ISO 10012, Measurement management systems — Requirements for measurement processes and measuring

equipment
ENV 13005:1999; Guide to the expression of uncertainty in measurement
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

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

— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1.1
full displacement pressuremeter
FDP
assembly containing a pressuremeter module (3.1.2) and a cone module (3.1.3)

Note 1 to entry: The FDP is jacked or driven directly into undisturbed ground with an integral cone at its lower

end thereby creating its own test hole. No preparation of the cavity is permitted either by pre-boring, pre-

pushing or any other means.
© ISO 2018 – All rights reserved 1
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SIST EN ISO 22476-8:2018
ISO 22476-8:2018(E)

Note 2 to entry: The applied pressure and associated expansion of the probe are measured and recorded so as to

obtain the stress-displacement relationship for the soil as tested (see Figure 1).

Key
1 full displacement pressuremeter 6 membrane
2 pressuremeter module 7 lower fixed membrane point
3 cone module 8 cone
4 push rod connector 9 cone tip
5 upper fixed membrane point 10 25 mm to 50 mm (according to ISO 22476-1)
NOTE The example is not to scale.
Figure 1 — Cross section of a full displacement pressuremeter
2 © ISO 2018 – All rights reserved
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SIST EN ISO 22476-8:2018
ISO 22476-8:2018(E)
3.1.2
pressuremeter module

cylindrical device designed to apply a uniform pressure to the walls of a cavity by means of an

expandable flexible single-cell membrane
3.1.3
cone module

cylindrical device with a conical shaped lower end and a connection to which the pressuremeter module

(3.1.2) can be attached

Note 1 to entry: The cone module can be instrumented with cone, friction sleeve and pore pressure sensors

according to ISO 22476-1.
3.1.4
membrane

part of the pressuremeter module (3.1.2) that is expanded and thereby transmits pressure to the

cavity wall

Note 1 to entry: The membrane is fitted on a mandrel. It may be externally or internally reinforced or protected.

The reinforcement or protection is deemed to be part of the membrane.
3.1.5
membrane length
distance between the upper and lower fixed points of the membrane (3.1.4)
Note 1 to entry: See Figure 1.
3.1.6
pressuremeter system

pressuremeter module (3.1.2), cone module (3.1.3), controlling devices and measuring system in

combination with any lines connecting them together
3.1.7
volume-displacement type pressuremeter

pressuremeter module (3.1.2) fitted with a sensor to measure the change in the volume of the

expanding cavity
3.1.8
radial-displacement type pressuremeter

pressuremeter module (3.1.2) fitted with sensors to measure the change in the radius or diameter of the

expanding cavity
3.1.9
membrane pressure loss

pressure in the pressuremeter module (3.1.2) required to expand the membrane (3.1.4) in air, expressed

as a funtion of the expansion
3.1.10
membrane compressibility

change in thickness of the membrane (3.1.4) as related to the change in internal pressure in the

pressuremeter module (3.1.2)
3.1.11
system compliance

volume change in a pressuremeter system (3.1.6) in response to the internal pressure variation in a

situation where the expansion of the membrane (3.1.4) is restricted

Note 1 to entry: The system compliance takes into account both the deformation of the pressuremeter system

(3.1.6) and the membrane compressibility (3.1.10) and includes time effects.
© ISO 2018 – All rights reserved 3
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SIST EN ISO 22476-8:2018
ISO 22476-8:2018(E)
3.1.12
applied pressure

pressure applied by the external surface of the membrane (3.1.4) to the walls of the cavity in the soil or

weak rock
3.1.13
calibration cylinder

cylindrical tube of known elastic properties used for the restriction of the membrane expansion and

hence for the determination of system compliance
3.1.14
reference reading

reading of a sensor just before the membrane (3.1.4) touches the wall of the calibration cylinder (3.1.13)

when expanding
3.1.15
cavity volume

volume of the cavity in the ground between the upper and lower fixed points of the membrane (3.1.4)

3.1.16
initial cavity volume
theoretical cavity volume (3.1.15), calculated as:
V = l ⋅ ¼ π (d )
0 mb cm
where
l is the membrane length;
d is the maximum diameter of the cone module
3.1.17
volumetric strain

change in the volume of the cavity with respect to the initial cavity volume (3.1.16)

VV−
ε =
where
V is the cavity volume;
V is the initial cavity volume

Note 1 to entry: Conversions between the volumetric strain and the radial strain are given in Annex E.

3.1.18
initial cavity radius
theoretical radius of the cavity, calculated as follows:
r = 0,5 d
0 cm
where d is the maximum cone module diameter
4 © ISO 2018 – All rights reserved
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SIST EN ISO 22476-8:2018
ISO 22476-8:2018(E)
3.1.19
radial strain

change in the radius of the cavity with respect to the initial cavity radius (3.1.18):

rr−
ε =
where
r is the cavity radius;
r is the initial cavity radius
3.1.20
rate of volumetric strain change
change of the volumetric strain (3.1.17) with time:
ΔV 1
ε =⋅
VtΔ
where
ΔV is the volume change over a selected period Δt;
V is the initial cavity volume;
Δt is the time increment over which the volume change took place
3.1.21
rate of radial strain change
change of the radial strain (3.1.19) with time:
Δr 1
ε =⋅
rtΔ
where
Δr is the radius change over a selected period Δt;
r is the initial cavity radius;
Δt is the time increment over which the radial displacement took place
3.1.22
rate of pressure application
rate of change of the applied pressure with time.
where
Δp is the pressure change over a selected period Δt;
Δt time increment over which the pressure took place
© ISO 2018 – All rights reserved 5
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