CEN/TR 17179:2018

SLOVENSKI STANDARD
01-april-2018
Cevni in kanalski sistemi iz plastomernih materialov - Sistemi za infiltracijo in
zadrževanje shranjene deževnice - Postopki za vgradnjo pod zemljo
Thermoplastics piping and ducting systems - Rainwater infiltration and storage
attenuation systems - Practices for underground installation
Einbauanleitungen für Rohrleitungs-, Regenwasserversickerungs- und
Regenrückhaltungshaltesysteme außerhalb von Gebäuden - Verfahren für den
Erdeinbau
Systèmes de canalisations et de gaines en matières thermoplastiques - Pratiques pour la
pose en enterrée
Ta slovenski standard je istoveten z: CEN/TR 17179:2018
ICS:
13.060.30 Odpadna voda Sewage water
23.040.05 Cevovodi za zunanje Pipeline and its parts for
sisteme za odpadno vodo in external sewage systems
njihovi deli
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TR 17179
TECHNICAL REPORT
RAPPORT TECHNIQUE
January 2018
TECHNISCHER BERICHT
ICS 13.060.30; 23.040.05; 23.040.20
English Version
Thermoplastics piping and ducting systems - Rainwater
infiltration and storage attenuation systems - Practices for
underground installation
Systèmes de canalisations et de gaines en matières Einbauanleitungen für Rohrleitungs-,
thermoplastiques - Pratiques pour la pose en enterrée Regenwasserversickerungs- und
Regenrückhaltungshaltesysteme außerhalb von
Gebäuden - Verfahren für den Erdeinbau

This Technical Report was approved by CEN on 17 December 2017. It has been drawn up by the Technical Committee CEN/TC
155.
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. CEN/TR 17179:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Symbols and abbreviations . 7
5 Transport, handling and storage at depots and sites . 7
5.1 General. 7
5.2 Transportation of boxes and box components . 8
5.3 Handling . 8
5.4 Storage . 8
6 Installation . 9
6.1 Behaviour of reservoirs . 9
6.2 Design considerations . 9
6.2.1 General. 9
6.2.2 Types of installation . 9
6.3 Excavation construction . 9
6.3.1 Safety . 9
6.3.2 Excavation width . 10
6.3.3 Excavation depth . 10
6.3.4 Excavation bottom . 10
6.4 Reservoir installation, procedures and control . 11
6.4.1 Handling . 11
6.4.2 Installation using geotextile (infiltration or attenuation) . 11
6.4.3 Installation using geomembranes (storage or attenuation) . 13
6.5 Backfilling . 13
6.5.1 General. 13
6.5.2 Basic procedure . 13
6.5.3 Side and initial backfill . 14
6.5.4 Recommended compaction methods . 14
6.5.5 Main backfill . 16
6.5.6 Compaction quality control . 16
6.6 Special precautions . 16
7 Ancillary components . 17
8 Inspection and testing . 17
8.1 Inspection . 17
8.1.1 Inspection before installation . 17
8.1.2 Inspection after installation . 17
8.2 Testing - Leak tightness testing for storage or watertight attenuation system . 17
Annex A (informative) Classification of soils . 18
Bibliography . 20
European foreword
This document (CEN/TR 17179:2018) has been prepared by Technical Committee CEN/TC 155
“Plastics piping systems and ducting systems”, the secretariat of which is held by NEN.
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.
Introduction
Ecological and sustainable rainwater management is an increasingly important subject for
communities, designers and other agencies. Due to the increasing amount of impermeable surfaces
being created by buildings and roads, rainwater falling in urban areas can have great difficulty in
finding its way into the ground or to receiving surface water. This can cause flash flooding, water in
basements and other life threatening situations.
Rainwater harvesting, infiltration and decentralized retention of rainwater (attenuation), are examples
of ecological and sustainable rainwater management. Excess water from rainwater harvesting systems
should be infiltrated into the ground or released in a controlled manner into surface water bodies.
Plastic geocellular systems, sometimes referred to as ‘boxes’, are a preferred solution for temporarily
storing rainwater underground. These boxes can be stacked in layers to form underground storage
reservoirs (e.g. tanks) able to store run-off from intensive rainfall falling over large surface areas. Plastic
boxes have the advantage of being light and easy to install whilst providing a large capacity for storage
relative to their overall volume. Some boxes are strong enough to be installed under roads, parking
areas and other landscape features. They can also be recycled very easily.
This Technical Report contains guidance for installation procedures for thermoplastic infiltration and
attenuation systems outside building structures, which should be completed in conjunction with
product specific installation instructions.
This Technical Report is a guidance document only. It provides a set of general guidelines which gives
best practice for underground installation of thermoplastic infiltration and attenuation systems outside
building structures.
This Technical Report includes recommendations for the reservoir surround and backfilling procedures
but not road base and road sub-base details. Attention is drawn to any national regulations which may
cover these or other aspects of installation.
This Technical Report is intended to be used by local authorities, design engineers, installation
contractors and manufacturers.
In this Technical Report, much of the guidance is expressed as requirements, e.g. by use of “shall” or by
instructions in the imperative. It is strongly recommended that these be followed whenever applicable.
Other guidance is presented for consideration as a matter of judgement in each case, e.g. by use of
“should”.
1 Scope
This Technical Report is applicable to the installation of rainwater infiltration and storage/attenuation
systems under gravity.
This Technical Report covers installations including:
— reservoirs made by assembled cuboid shaped thermoplastic boxes;
— integral components;
— ancillary components (e.g. access provisions and connections);
— geotextiles and/or geomembranes;
— embedment and backfill.
These systems are intended for underground use in landscape, pedestrian or vehicular traffic areas and
are used outside building structures.
This Technical Report is only applicable to systems containing boxes to create a reservoir where the
manufacturer has clearly stated in the installation instructions how the components should be
assembled.
This Technical Report is a guidance document. It provides a set of general guidelines which gives best
practice for installation.
NOTE 1 It is anticipated that additional recommendations and/or requirements (e.g. design, dimensioning and
structural aspects) will be detailed in the relevant standards.
NOTE 2 Attention is drawn to the need to comply with national or local regulations.
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.
EN 1610:2015, Construction and testing of drains and sewers
EN 13249, Geotextiles and geotextile-related products - Characteristics required for use in the
construction of roads and other trafficked areas (excluding railways and asphalt inclusion)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
system
assembly including:
— a reservoir made by assembled cuboid shaped thermoplastic boxes (injection moulded or
extruded);
— integral components;
— ancillary components (e.g. access provisions and connections);
— geotextiles and/or geomembranes;
— embedment and backfill
Note 1 to entry: See Figure 1 for an illustration of the meaning and limits of the terms used in this Technical
Report.
Key
1 cover layer
2 initial backfill  bS horizontal clearance betw
...