EN ISO 22282-6:2012

SLOVENSKI STANDARD
01-december-2012
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Geotechnical investigation and testing - Geohydraulic testing - Part 6: Water permeability
tests in a borehole using closed systems (ISO 22282-6:2012)
Geotechnische Erkundung und Untersuchung - Geohydraulische Versuche - Teil 6:
Wasserdurchlässigkeitsversuche im Bohrloch unter Anwendung geschlossener Systeme
(ISO 22282-6:2012)
Reconnaissance et essais géotechniques - Essais géohydrauliques - Partie 6: Essai de
perméabilité à l'eau dans un forage en tube fermé (ISO 22282-6:2012)
Ta slovenski standard je istoveten z: EN ISO 22282-6:2012
ICS:
93.020 Zemeljska dela. Izkopavanja. Earthworks. Excavations.
Gradnja temeljev. Dela pod Foundation construction.
zemljo Underground works
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 22282-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2012
ICS 93.020
English Version
Geotechnical investigation and testing - Geohydraulic testing -
Part 6: Water permeability tests in a borehole using closed
systems (ISO 22282-6:2012)
Reconnaissance et essais géotechniques - Essais Geotechnische Erkundung und Untersuchung -
géohydrauliques - Partie 6: Essais de perméabilité à l'eau Geohydraulische Versuche - Teil 6:
dans un forage en tube fermé (ISO 22282-6:2012) Wasserdurchlässigkeitsversuche im Bohrloch unter
Anwendung geschlossener Systeme (ISO 22282-6:2012)
This European Standard was approved by CEN on 31 May 2012.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 22282-6:2012: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 22282-6:2012) 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 December 2012, and conflicting national standards shall be withdrawn
at the latest by December 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 organisations 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, Turkey and the United Kingdom.

INTERNATIONAL ISO
STANDARD 22282-6
First edition
2012-06-01
Geotechnical investigation and testing —
Geohydraulic testing —
Part 6:
Water permeability tests in a borehole
using closed systems
Reconnaissance et essais géotechniques — Essais géohydrauliques —
Partie 6: Essais de perméabilité à l’eau dans un forage en tube fermé
Reference number
ISO 22282-6:2012(E)
©
ISO 2012
ISO 22282-6:2012(E)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2012 – All rights reserved

ISO 22282-6:2012(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication 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 patent rights.
ISO 22282-6 was prepared by the European Committee for Standardization (CEN) Technical Committee
CEN/TC 341, Geotechnical investigation and testing, in collaboration with Technical Committee ISO/TC 182,
Geotechnics, Subcommittee SC 1, Geotechnical investigation and testing, in accordance with the Agreement
on technical cooperation between ISO and CEN (Vienna Agreement).
ISO 22282 consists of the following parts, under the general title Geotechnical investigation and testing —
Geohydraulic testing:
— Part 1: General rules
— Part 2: Water permeability tests in a borehole using open systems
— Part 3: Water pressure tests in rock
— Part 4: Pumping tests
— Part 5: Infiltrometer tests
— Part 6: Water permeability tests in a borehole using closed systems
INTERNATIONAL STANDARD ISO 22282-6:2012(E)
Geotechnical investigation and testing — Geohydraulic testing —
Part 6:
Water permeability tests in a borehole using closed systems
1 Scope
This part of ISO 22282 specifies requirements for the determination of the local permeability in soils and
rocks below or above the groundwater table in a closed system by the water permeability tests as part of the
geotechnical investigation services according to EN 1997-1 and EN 1997-2.
The tests are used to determine the permeability coefficient k in low permeability soil and rock lower than
−8
10 m/s. It can also be used to determine the transmissivity T and the storage coefficient S.
NOTE The water pressure test in rock is covered by ISO 22282-3.
2 Normative references
The following referenced documents are indispensable for the 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.
ISO 14688-1, Geotechnical investigation and testing ― Identification and classification of soil ― Part 1:
Identification and description
ISO 14689-1, Geotechnical investigation and testing ― Identification and classification of rock ― Part 1:
Identification and description
ISO 22282-1, Geotechnical investigation and testing — Geohydraulic tests — Part 1: General rules
ISO 22475-1, Geotechnical investigation and testing — Sampling method and groundwater measurements —
Part 1: Technical principles for execution
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 22282-1 apply.
3.2 Symbols
For the purposes of this document, the symbols given in Table 1 apply.
ISO 22282-6:2012(E)
Table 1 — Symbols
Symbol Designation Unit
−1
C apparent compressibility of the measurement device Pa
app
−1
C compressibility of the water Pa
w
F shape factor —
−2
g acceleration due to gravity m.s
h hydraulic head m
h pre-test stabilized hydraulic head m
st
−1
k permeability coefficient m.s
−1
k permeability coefficient at a temperature of 20 °C m.s
L
height of the cavity m
p
pressure Pa
3 −1
Q
flow rate m .s
r radius of the measurement cavity and of the borehole m
c
S
storage coefficient —
2 −1
T
transmissivity (T = k L) m .s
t time s
V volume m
V volume of water submitted to pressure pulse m
w
z height of the middle of the cavity in relation to the natural land m
c
z height of the pressure sensor in relation to the natural land m
capt
η dynamic viscosity of the water Pa.s
−3
ρ density of the water kg.m
w
Δh variation in initial hydraulic head m
ΔV variation in initial volume m
Δp variation in initial pressure Pa
4 Equipment
The basic equipment consists of the following parts (see also the example in Figure 1):
— pump or pressure source capable of injecting or removing water to the water-filled system to produce a
pressure pulse in the test interval;
— pipes;
— single or double packer;
— shut-off valve in the pipe above the test section;
— pressure measuring and recording device in test section;
— data acquisition system.
2 © ISO 2012 – All rights reserved

ISO 22282-6:2012(E)
Key
1 test section
2 inflatable packer
3 packer inflation device
4 isolating valve (bottom valve)
5 pressure and water temperature device
6 hydraulic delivery pipe
7 pressure and water temperature indicating and recording device
8 water reservoir
9 device for application of pressure pulse and measurement of compressibility
10 ground level
Figure 1 — Test equipment — Example
5 Test procedure
5.1 General
The principle of water permeability tests in a borehole using closed systems is based on an instantaneous
change of the hydraulic head in a test section. The dissipation of imposed head is recorded as a function of time.
According to Figure 1, a volume of water is pressurized on a test section of a borehole closed off by one or
more packers in order to determine dissipation of pressure with time.
ISO 22282-6:2012(E)
The test can be carried out in a borehole of any orientation and diameter. The test section may be located
above or below the groundwater level.
5.2 Installation of equipment
The test rod or tubing shall be installed into the borehole with the valve open.
The packer(s) shall be inflated or the sealing plug shall be installed.
5.3 Determination of the pre-test stabilized hydraulic head
5.3.1 Below water table
Below groundwater table, an initial measurement of the initial hydraulic head in the soil or rock to be tested
shall be conducted:
— starting the recording system of the pressure in the test section;
— closing the isolating valve;
— monitoring the pressure, until the state of equilibrium is reached.
Monitoring shall be continued until the head variation Δh is less than 10 % of variation in initial head.
5.3.2 Above water table
In the case of a test in initially unsaturated soil, the soil around the test section shall be initially saturated
before applying the pressure pulse. This saturation results in a major reduction of the suction in the vicinity
of the test section.
The recommended value for the constant hydraulic head for this phase is approximately 1 m of water with
respect to the ground level. The volume infiltrated during this phase shall be estimated and indicated in the test
report. The duration of the infiltration phase depends largely on the permeability of the soil. Table 1 indicates
the minimum duration of the saturation phase for various permeability ranges.
Table 2 — Duration of saturation phase and permeability ranges
Permeability coefficient k (m/s)
−8 −9 −10
1,10 1,10 1,10
Duration of saturation phase (hours)
3 10 20
After the saturation phase, stabilized hydraulic head is determined according to 5.3.1.
5.3.3 Application of the pressure pulse
With the isolating valve still in the closed position, the pressure variation shall be adjusted above the valve to
be produced within the test section.
The amplitude of the pressure pulse shall be limited in order to avoid all risks of hydraulic fracturing of the soil
within the test section. The hydraulic head increment above ground level shall be less than 30 % of the depth
of the t
...