EN ISO 10772:2012
(Main)Geotextiles - Test method for the determination of the filtration behaviour of geotextiles under turbulent water flow conditions (ISO 10772:2012)
Geotextiles - Test method for the determination of the filtration behaviour of geotextiles under turbulent water flow conditions (ISO 10772:2012)
ISO 10772:2012 describes a test method for determining the soil passing through a geotextile filter when exposed to turbulent external water flow conditions.
Geotextilien - Prüfverfahren zur Bestimmung der Filterbeständigkeit von Geotextilien in turbulenten Strömungsbedingungen (ISO 10772:2012)
Dieses Dokument legt ein Prüfverfahren zur Bestimmung des Bodendurchgangs fest, der durch ein geotextiles Filtermaterial durchgeht, wenn der geotextile Filter turbulenten äußeren Strömungsbelastungen ausgesetzt ist.
Für wasserbauliche Anwendungen liefert diese Prüfung einen Wert für einen bestimmten Bodentyp, der zur Bewertung des Verhaltens von Schichten mit geotextilen Filtern dient, die als Schutz gegen Erosion angewendet werden.
Géotextiles - Méthode d'essai pour la détermination du comportement en filtration des géotextiles en régime d'écoulement turbulent (ISO 10772:2012)
L'ISO 10772:2012 décrit une méthode d'essai permettant de déterminer le sol passant à travers un filtre géotextile, lorsqu'il est exposé à un régime d'écoulement turbulent externe.
Preskusne metode za ugotavljanje odpornosti geotekstilij proti precejanju pri močnem pretoku vode (ISO 10772:2012)
Ta mednarodni standard opisuje preskusno metodo za ugotavljanje prehajanja zemlje skozi geotekstilni filter pri močnem pretoku vode. Ta preskus za specifično vrsto zemlje predstavlja preskus zmogljivosti za oblikovanje plasti z geotekstilnimi filtri za zaščito pred erozijo v napravah hidravličnega inženiringa.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2012
3UHVNXVQHPHWRGH]DXJRWDYOMDQMHRGSRUQRVWLJHRWHNVWLOLMSURWLSUHFHMDQMXSUL
PRþQHPSUHWRNXYRGH ,62
Test method for the determination of the filtration behaviour of geotextiles under turbulent
water flow conditions (ISO 10772:2012)
Prüfverfahren zur Bestimmung der Filterbeständigkeit von Geotextilien in turbulenten
Strömungsbedingungen (ISO 10772:2012)
Méthode d'essai relative à la détermination du comportement de la filtration des
géotextiles en conditions d'écoulement d'eau turbulentes (ISO 10772:2012)
Ta slovenski standard je istoveten z: EN ISO 10772:2012
ICS:
59.080.70 Geotekstilije Geotextiles
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 10772
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2012
ICS 59.080.70
English Version
Geotextiles - Test method for the determination of the filtration
behaviour of geotextiles under turbulent water flow conditions
(ISO 10772:2012)
Géotextiles - Méthode d'essai pour la détermination du Geotextilien - Prüfverfahren zur Bestimmung der
comportement en filtration des géotextiles en régime Filterbeständigkeit von Geotextilien in turbulenten
d'écoulement turbulent (ISO 10772:2012) Strömungsbedingungen (ISO 10772:2012)
This European Standard was approved by CEN on 14 August 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, Former Yugoslav Republic of Macedonia, 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 10772:2012: E
worldwide for CEN national Members.
Contents Page
Foreword .3
Foreword
This document (EN ISO 10772:2012) has been prepared by Technical Committee ISO/TC 221
"Geosynthetics" in collaboration with Technical Committee CEN/TC 189 “Geosynthetics” the secretariat of
which is held by NBN.
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 February 2013, and conflicting national standards shall be withdrawn
at the latest by February 2013.
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, Former Yugoslav Republic of Macedonia, 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.
Endorsement notice
The text of ISO 10772:2012 has been approved by CEN as a EN ISO 10772:2012 without any modification.
INTERNATIONAL ISO
STANDARD 10772
First edition
2012-08-15
Geotextiles — Test method for the
determination of the filtration behaviour
of geotextiles under turbulent water
flow conditions
Géotextiles — Méthode d’essai pour la détermination du comportement
en filtration des géotextiles en régime d’écoulement turbulent
Reference number
ISO 10772:2012(E)
©
ISO 2012
ISO 10772:2012(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
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Published in Switzerland
ii © ISO 2012 – All rights reserved
ISO 10772:2012(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principles . 1
5 Test method . 1
6 Test soils . 2
7 Sampling and sample installation . 2
8 Test apparatus . 2
9 Procedure . 3
10 Evaluation . 3
11 Test report . 4
Annex A (informative) Grading curve . 9
Bibliography .10
ISO 10772:2012(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 10772 was prepared by Technical Committee ISO/TC 221, Geosynthetics.
iv © ISO 2012 – All rights reserved
INTERNATIONAL STANDARD ISO 10772:2012(E)
Geotextiles — Test method for the determination of the filtration
behaviour of geotextiles under turbulent water flow conditions
1 Scope
This International Standard describes a test method for determining the soil passing through a geotextile filter
when exposed to turbulent external water flow conditions.
The test provides a value for one specific type of soil as a performance test for the design of erosion protection
layers with geotextile filters in hydraulic engineering applications.
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 9862, Geosynthetics — Sampling and preparation of test specimens
ISO 12956, Geotextiles and geotextile-related products — Determination of the characteristic opening size
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply:
3.1
soil passing value
S
pv
cumulative average soil passing value for the three specimens after the final stage
3.2
cohesion
c
u
undrained cohesion of the test soil
3.3
plasticity index
I
P
plasticity of test soil
4 Principles
The test simulates the exposure of geotextiles to turbulent conditions such as those that occur during wave
action, the passage of a ship, etc. The filtration stability of the geotextile is determined by measuring the
amount and rate of soil passing through the geotextile during the test.
5 Test method
The mechanical filtration stability of the test soil and of similar soils is determined by measuring the soil passing
through the filter during each stage of the test. The test results will also show whether the rate at which soil
passes through the geotextile filter has been stabilized as necessary.
ISO 10772:2012(E)
6 Test soils
The test soil is dried to constant mass at 105°C directly before use.
An example for the grading curve of a medium to coarse silt as test soil is shown in Annex A. The cohesion of
the undrained test soil is less than or equal to 1,5 kN/m .
7 Sampling and sample installation
The sampling shall be carried out in accordance with ISO 9862. Three geotextile specimens, each with a
diameter of 168 mm, are punched out of the laboratory sample. Each specimen shall be placed in a sample
container with the upper surface of the geotextile facing downwards as shown in Figure 1. 1 500 g of the test
soil type are placed loosely on the geotextile and spread evenly over the sample using an adjustable gauge.
Compact the test soil by using a pressure that exerts a surface pressure of 2 kN/m on the geotextile. The load
is applied using 1 500 g of the test soil and a 151 mm diameter brass disc weighing 2 130 g. Two pieces of non-
woven geotextile material (mass per unit area: 600 g/m , thickness: 6 mm) with diameters of 152 mm shall be
placed between the upper surface of the test soil and the metal disc to prevent any loss of soil at the annular
gap between the sample mould and the disc.
Fasten the specimen container securely on a vertically oscillating electromagnetic screen (e.g. sieving device
according to ISO 12956) for compaction. Place a 5 mm thick plastic disc beneath the geotextile specimen to
prevent the material from sagging while the soil is being compacted. The soil shall be compacted at a frequency
of 50 Hz and an amplitude of 1,5 mm for 240 s. The lid of the test specimen is then closed and the specimen
stored in tap water at a temperature of 20°C ± 5°C and left to saturate for at least 16 h. Cover the test specimen
with water to a depth of 20 cm. Immerse the specimen at an angle such as to prevent any air bubbles being
trapped under the surface of the geotextile.
8 Test apparatus
The test apparatus shall be designed to test with three sample containers simultaneously. It comprises a load-
bearing steel frame with a flange-mounted electric motor (the drive), an electric control system, a v-belt drive,
drive shafts fitted with turbulence-producing fans, sample containers and collecting vessels. The dimensions
of the test apparatus are shown in Figures 2a), 2b) and 3. The materials, dimensions and structure of the single
sample containers are shown in Figures 1a) and 1b). The sample containers are fastened firmly to the test
frame by means of the brass pipe bolted in the centre of the transparent plastic lid. The pipe is also used to
evacuate air from the sample containers and equalize the pressure inside them during the test. The water level
in the water tank at rest is set using the millimetre scale on the transparent plastic window at the front of the
tank. The rotor speed depends on
...
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