EN 13491:2004

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Geosynthetische Dichtungsbahnen - Eigenschaften, die für die Anwendung beim Bau von Tunneln und Tiefbauwerken erforderlich sindGéomembranes, géosynthétiques bentonitiques - Caractéristiques requises pour l' utilisation dans la construction des tunnels et ouvrages souterrainsGeosynthetic barriers - Characteristics required for use as a fluid barrier in the construction of tunnels and underground structures93.060Gradnja predorovTunnel construction59.080.70GeotekstilijeGeotextilesICS:Ta slovenski standard je istoveten z:EN 13491:2004SIST EN 13491:2005en01-marec-2005SIST EN 13491:2005SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13491August 2004ICS 59.080.70; 91.100.50 English versionGeosynthetic barriers - Characteristics required for use as a fluidbarrier in the construction of tunnels and underground structuresBarrières géosynthétiques - Caractéristiques requises pourl'utilisation comme barrière contre les liquides dans laconstruction des tunnels et des structures souterrainesGeosynthetische Dichtungsbahnen - Eigenschaften, die fürdie Anwendung beim Bau von Tunneln und Tiefbauwerkenerforderlich sindThis European Standard was approved by CEN on 17 March 2003.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13491:2004: ESIST EN 13491:2005

Tests for some non-mandated characteristics are still under study and will be included when the standard is revised. The term “product” used in this document refers to a geosynthetic barrier, including polymeric geosynthetic barriers, clay geosynthetic barriers and bituminous geosynthetic barriers. This document is part of a group of standards, addressing the requirements for geosynthetic barriers when used in a specific application.
Particular application cases can contain requirements about additional properties and - preferably standardised - test methods, if they are technically relevant and not conflicting with European Standards.
The design life of the product should be determined, since its function may be temporary, as a construction expediency, or permanent, for the lifetime of the structure.
1 Scope This document specifies the relevant characteristics of geosynthetic barriers, including polymeric geosynthetic barriers, clay geosynthetic barriers and bituminous geosynthetic barriers, when used as fluid barriers in the construction of tunnels and underground structures, and the appropriate test methods to determine these characteristics.
The intended use of these products is to control the leakage of water through the construction wall.
This document is not applicable to geotextiles or geotextile-related products. This document provides for the evaluation of conformity of the product to this document. This document defines requirements to be met by manufacturers and distributors with regard to the presentation of product properties.
This document does not cover applications where the geosynthetic barrier is to be in contact with water that has been treated for human consumption.
NOTE: Where potable water is or may be in direct contact with the product the designer should also refer to other relevant standards, requirements and/or regulations. 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. EN 495-5 Flexible sheets for waterproofing – Determination of foldability at low temperature – Part 5: Plastic and rubber sheets for roof waterproofing EN 963 Geotextiles and geotextile-related products – Sampling and preparation of test specimens EN 1109 Flexible sheets for waterproofing – Bitumen sheets for roof waterproofing - Determination of flexibility at low temperature EN 1849-1 Flexible sheets for waterproofing – Determination of thickness and mass per unit area – Part 1: Bitumen sheets for roof waterproofing EN 1849-2 Flexible sheets for waterproofing – Determination of thickness and mass per unit area – Part 2: Plastic and rubber sheets for roof waterproofing EN 12224 Geotextiles and geotextile-related products – Determination of the resistance to weathering EN 12225 Geotextiles and geotextile-related products – Method for determining the microbiological resistance by a soil burial test EN 12226 Geotextiles and geotextile-related products – General tests for evaluation following durability testing EN 12310-1 Flexible sheets for waterproofing – Part 1: Bitumen sheets for waterproofing – Determination of resistance to tearing (nail shank)
ISO R 527-3 Plastics -- Determination of tensile properties -- Part 3: Test conditions for films and sheets
ASTM D 696-91 Standard test method for coefficient of linear thermal expansion of plastics between -30 °C and 30 °C ASTM D 1434-82 Standard test method for determining gas permeability characteristics of plastic film and sheeting ASTM D 5397-99 Standard test method for evaluation of stress crack resistance of polyolefin geomembranes using notched constant tensile load test ASTM D 5887-95 Standard test method for measurement of index flux through saturated geosynthetic clay liner specimens using a flexible wall permeameter ASTM D 5890-95 Standard test method for swell index of clay mineral component of geosynthetic clay liners 3 Definitions and abbreviations 3.1 Definitions For the purpose of this document the definitions given in prEN ISO 10318:2002 and the following apply:
3.1.1 product geosynthetic barrier, including polymeric, bituminous and clay barriers 3.1.2 specification any document in which the works, functions, specific conditions and required material property values of the geosynthetic barrier of use are described 3.1.3 underground structure any constructed void below ground which belongs to the tunnel construction 3.1.4 tunnel underground passage, open to the daylight at one or both ends, with a minimum diameter of one meter, which is made by removing soil or rock 3.1.5 moisture barrier barrier used to prevent the ingress of liquids and vapours, mainly water, without external hydrostatic pressure, to a tunnel or underground structure 3.1.6 pressure water barrier barrier used to prevent or reduce the escape from or the ingress of water to a tunnel or underground structure when subject to external hydrostatic pressure SIST EN 13491:2005

GBR-P: polymeric geosynthetic barrier GBR-B: bituminous geosynthetic barrier GBR-C: clay geosynthetic barrier 4 Required characteristics and corresponding methods of test 4.1 General The main function of geosynthetic barriers used in the construction of tunnels and underground structures is to prevent or reduce the flow of fluid through the structure wall. Damage during installation has not been addressed in this document. 4.2 Types of Application
4.2.1 Application 1: " seepage water tunnel" Application where the geosynthetic barrier is used as a stand-alone seepage (moisture) barrier. Figure 1 shows a typical cross-section.
Key 1 rock 2 shotcrete 3 geotextile 4 geosynthetic barrier 5 concrete Figure 1 A geosynthetic barrier in a drilled seepage water tunnel 4.2.2 Application 2: "pressurised water tunnel" Application where the geosynthetic barrier is used as a barrier against pressurised water. Figure 2 shows a typical cross-section. SIST EN 13491:2005

Key 1 rock 2 shotcrete 3 geotextile 4 geosynthetic barrier 5 concrete Figure 2
A geosynthetic barrier in a drilled pressurised water tunnel SIST EN 13491:2005

Key 1 soil 2 protection layer 3 geosynthetic barrier 4 geotextile 5 concrete Figure 3
A geosynthetic barrier in a cut and cover seepage water tunnel SIST EN 13491:2005

Key 1 soil 2 protection layer 3 geosynthetic barrier 4 geotextile 5 concrete Figure 4
A geosynthetic barrier in a cut and cover pressurised water tunnel
4.3 Relevant characteristics The characteristics and the test methods to be used, are given in Table 1. The list of characteristics in Table 1 includes those relevant to all conditions of use and subject to harmonisation (H) (see Bibliography), those relevant to all conditions of use and not subject to harmonisation (A), and those relevant to specific conditions of use and not subject to harmonisation (S).
The functions and conditions of use, corresponding with the characteristics, marked with “S” in Table 1, are specified in 4.4.
The manufacturer shall provide the data based on the results of tests specified in this document and, where relevant, in accordance with 5.1. The manufacturer shall provide information on how functioning joints can be made. Where products are jointed in the factory the water permeability and if relevant the strength of the joints shall be tested and data presented. SIST EN 13491:2005

Geosynthetic Barrier Test Methods Remarks Nr Property to be tested GBR-P
GBR-B GBR-C GBR-P
GBR-B GBR-C
Physical Properties
1 Thickness A A - EN 1849-2 EN 1849-1 -
2 Mass per unit area A A A EN 1849-2 EN 1849-1 EN 14196
Hydraulic Properties
3 Water permeability (liquid tightness)
H H H pr EN 14150 pr EN 14150 ASTM D 5887-95 4 Swell Index - - A - - ASTM D 5890-95
Mechanical Properties
5 Tensile strength
H H H ISO R 527 EN 12311-1 EN ISO 10319 For GBR-P use ISO 527 part 1 and 3, test specimen type 5 at a speed of 100 mm/min and report the maximum strength measured in accordance with the test method. 6 Elongation A A A ISO R 527 EN 12311-1 EN ISO 10319 For GBR-P use ISO 527 part 1 and 3, test specimen type 5 at a speed of 100 mm/min; calculation of elongation as defined in ISO 527-1, 10.2 using grip separation measurement. 7 Static Puncture H H H EN ISO 12236 EN ISO 12236 EN ISO 12236
8 Burst Strength S S S prEN 14151
prEN 14151 prEN 14151 This test applies to GBR-C only if they contain a polymeric or bituminous barrier element 9 Tear strength S S - ISO 34 EN 12310-1 - For GBR-P use Method B, angle Specimen (Figure 2) without nick at a speed of 50 mm/min
Thermal Properties
10 Low temperature behaviour (flexure) S S - EN 495-5 EN 1109 -
11 Thermal expansion A A - ASTM D 696-91 - -
Durability and Chemical Resistance
12 Weathering S S - EN 12224 EN 12224 - GBR-C: see 4.4.4 13 Micro organisms S S S EN 12225 EN 12225 EN 12225
Geosynthetic Barrier Test Methods Remarks Nr Property to be tested GBR-P
GBR-B GBR-C GBR-P
GBR-B GBR-C
14 Oxidation H H H prEN 14575 prEN 14575
prEN ISO 13438
for the geotextile elements and reinforcement yarns of GBR-C barriers prEN ISO 13438 is applicable 15 Environmental stress cracking H - S ASTM D 5397-99 (appendix) - ASTM D 5397-99 (appendix)
GBR-C: Only applicable to polymeric membrane element of the GBR-C 16 Chemical resistance S S S EN 14414 EN 14414 EN 14414
17 Wetting/drying - - S - - prEN 14417
18 Freezing / thaw - - S - - prEN 14418
19 Root penetration S S S prCEN/TS 14416: prCEN/TS 14416 prCEN/TS 14416
20 Reaction to fire A A A EN ISO 11925-2 EN ISO 11925-2 EN ISO 11925-2 GBR should be tested in metal frame only Relevancy:
H : required for harmonisation;
A : relevant to all conditions of use; S : relevant to specific conditions of use;
-: not relevant
NOTE: Particular application cases may contain requirements about additional properties and - preferably standardised - test methods, if they are technically relevant and not conflicting with European Standards. The design life of the product should be determined, since its function may be temporary, as a construction expediency, or permanent, for the lifetime of the structure.
4.4.3 Low temperature behaviour Data on low temperature behaviour are required for applications where polymer and bituminous products may be exposed to low temperatures in storage, construction, and use
NOTE Tests which set simple pass/fail criteria at a single temperature condition may not be appropriate for this purpose.
Prehydrated GBR-C should not be stored or installed when the ambient temperature is below 0 °C. 4.4.4 Weathering Data on weathering (combined effects of cycles of wetting, temperature change, and exposure to UV light) are required for applications where the GBR-C barrier will be exposed to weathering without adequate protective cover. It should be noted that in all normal situations GBR-C barriers should be covered with soil or other revetment on the same working day or prior to any circumstances which could cause
a hydration of
the clay component. 4.4.5
Resistance to wetting and drying Data on the resistance of GBR-C to repeated wetting and drying is required when the conditions of use will subject the product to this sequence of actions. 4.4.6 Freeze-thaw cycle resistance Data on the resistance of GBR-C to freeze/thaw is required when the conditions of use will subject the product to this sequence of actions. 4.4.7 Resistance to root penetration. Data on root penetration is required in all applications where the geosynthetic barrier is exposed to soils containing restorative vegetation.
If the test result(s) for a particular characteristic is (are) within the tolerance limit(s) given by the manufacturer, the product is accepted as complying with respect to this characteristic. If the test result(s) for a particular characteristic is (are) outside the tolerance limit(s), specimens prepared from sample B shall be tested. If the test result(s) of the sample B specimens for the same characteristic are within the given tolerance limit(s), the product is accepted as complying with respect to that characteristic. If the test result(s) is (are) outside the tolerance limit(s), the product is not accepted. 5.3 Initial type tests. Initial type tests shall be carried out by the manufacturer to define the values of the properties to be declared for the product to satisfy the requirements of this document. Initial type tests shall also be carried out on existing products when a change in the basic materials or manufacturing procedures affects the declared properties or the use of a product. In these cases the appropriate initial type tests are those for the properties which are affected or need confirming and new properties introduced by a change of use. The tests to be conducted shall be reference tests as specified in this document. and shall be selected for the characteristics specified in Table 2, consis
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