CEN TR 17179-2018 Thermoplastics piping and ducting systems - Rainwater infiltration and storage attenuation systems - Practices for underground installation.pdf

1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Thermoplastics piping and ducting systems - Rainwater infiltration and storage attenuation systems - Practices for underground installationPD CEN/TR 17179:2018National forewordThis Published Document is the UK implement

2、ation of CEN/TR 17179:2018.The UK participation in its preparation was entrusted to Technical Committee PRI/88, Plastics piping systems.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary pro

3、visions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 51465 4ICS 13.060.30; 23.040.20; 23.040.05Compliance with a British Standard cannot confer immunity from legal obligations. This Publ

4、ished Document was published under the authority of the Standards Policy and Strategy Committee on 31 March 2018.Amendments/corrigenda issued since publicationDate Text affectedPUBLISHED DOCUMENTPD CEN/TR 17179:2018TECHNICAL REPORTRAPPORT TECHNIQUETECHNISCHER BERICHTCEN/TR 17179January 2018ICS 13.06

5、0.30; 23.040.05; 23.040.20EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref. No. CEN/TR 17179:2018: EAll rights of exploitation in any form and by any means reserved worldwid

6、e for CEN national MembersThermoplastics piping and ducting systems - Rainwater infiltration and storage attenuation systems - Practices for underground installationSystmes de canalisations et de gaines en matires thermoplastiques - Pratiques pour la pose en enterreEinbauanleitungen fr Rohrleitungs-

7、, Regenwasserversickerungs- und Regenrckhaltungshaltesysteme auerhalb von Gebuden - Verfahren fr den ErdeinbauThis 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, B

8、ulgaria, 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, Swit

9、zerland, Turkey and United Kingdom.English VersionCEN/TR 17179:2018 (E)European foreword 3Introduction . 41 Scope . 52 Normative references 53 Terms and definitions . 54 Symbols and abbreviations . 75 Transport, handling and storage at depots and sites . 75.1 General . 75.2 Transportation of boxes a

10、nd box components 75.3 Handling 85.4 Storage . 86 Installation . 86.1 Behaviour of reservoirs . 86.2 Design considerations. 96.2.1 General 96.2.2 Types of installation 96.3 Excavation construction 96.3.1 Safety 96.3.2 Excavation width . 96.3.3 Excavation depth.106.3.4 Excavation bottom .106.4 Reserv

11、oir installation, procedures and control .116.4.1 Handling . 116.4.2 Installation using geotextile (infiltration or attenuation) .116.4.3 Installation using geomembranes (storage or attenuation) .126.5 Backfilling . 136.5.1 General. 136.5.2 Basic procedure .136.5.3 Side and initial backfill 136.5.4

12、Recommended compaction methods 146.5.5 Main backfill156.5.6 Compaction quality control . 166.6 Special precautions 167 Ancillary components 168 Inspection and testing .178.1 Inspection . 178.1.1 Inspection before installation 178.1.2 Inspection after installation 178.2 Testing - Leak tightness testi

13、ng for storage or watertight attenuation system 17Annex A (informative) Classification of soils 18Bibliography .202Contents PagePD CEN/TR 17179:2018CEN/TR 17179:2018 (E)European forewordThis document (CEN/TR 17179:2018) has been prepared by Technical Committee CEN/TC 155 “Plastics piping systems and

14、 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.3PD CEN/TR 17179:2018CEN/TR 17179:2018 (E)I

15、ntroductionEcological 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 find

16、ing 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 managemen

17、t. 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 b

18、e 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.

19、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 sh

20、ould 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 st

21、ructures.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 use

22、d 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 g

23、uidance is presented for consideration as a matter of judgement in each case, e.g. by use of “should”.4PD CEN/TR 17179:2018CEN/TR 17179:2018 (E)1 ScopeThis Technical Report is applicable to the installation of rainwater infiltration and storage/attenuation systems under gravity.This Technical Report

24、 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, pe

25、destrian 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 Rep

26、ort 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 i

27、s drawn to the need to comply with national or local regulations.2 Normative referencesThe 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 refe

28、rences, the latest edition of the referenced document (including any amendments) applies.EN 1610:2015, Construction and testing of drains and sewersEN 13249, Geotextiles and geotextile-related products - Characteristics required for use in the construction of roads and other trafficked areas (exclud

29、ing railways and asphalt inclusion)3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1systemassembly including: a reservoir made by assembled cuboid shaped thermoplastic boxes (injection moulded or extruded); integral components; ancillary componen

30、ts (e.g. access provisions and connections); geotextiles and/or geomembranes; embedment and backfillNOTE See Figure 1 for an illustration of the meaning and limits of the terms used in this Technical Report. 5PD CEN/TR 17179:2018CEN/TR 17179:2018 (E)Key1 cover layer 2 initial backfill bShorizontal c

31、learance between the reservoir and the excavation sidewall3 ground surface b width of a trench cross-section4 native (e.g. in situ) soil heheight of the embedment5 foundation zone hrheight of the reservoir6 main backfill angle of the trench7 side backfill wrwidth of the reservoir8 geotextile / geome

32、mbrane wewidth of excavation on surface level9 bottom excavation 10 lower bedding 11 ancillary components 12 box including integral components Figure 1 Terminology infiltration/attenuation system3.2reservoirassembly of boxes including integral components3.3ancillary componentsproducts including inle

33、ts, outlets, ventilation, access for measurements and inspection3.4integral componentsload bearing components contributing to the overall strength of the box3.5main backfilllayer on top of the initial and side backfillNOTE Note to entry: The requirements for the main backfill are dependent on the in

34、tended use of the surface.6 PD CEN/TR 17179:2018CEN/TR 17179:2018 (E)3.6initial backfilllayer of fill material immediately above the crown of the reservoir3.7cover layerinitial plus main backfill3.8height of the embedmentheight of the lower bedding, plus height of the reservoir plus the height of th

35、e initial backfill3.9lower beddingpart of the construction which supports the reservoir on top of the excavation bottom4 Symbols and abbreviationsFor the purposes of this document, the following symbols apply.b width of a trench cross-section (see Figure 1);bshorizontal clearance between the reservo

36、ir and the trench (see Figure 1);heheight of the embedment;hrheight of the reservoir; angle of the trench;wrwidth of the reservoir;wewidth of excavation on surface level;M compaction class moderate;N compaction class not;W compaction class well.5 Transport, handling and storage at depots and sites5.

37、1 GeneralThermoplastics boxes and box components may be supplied with or without packaging.Attention is drawn to the need for consideration of personnel safety during the transport, handling and storage, especially in wet and cold weather conditions.5.2 Transportation of boxes and box componentsBox

38、and components should be inspected on delivery to ensure that they are marked appropriately and comply with the specified requirements.Any handling or transportation instructions from the manufacturer should be complied with.Products should be examined both on delivery and immediately prior to insta

39、llation to ensure that all components have been delivered and that all components are free from damage and in accordance with the relevant product standard.7PD CEN/TR 17179:2018CEN/TR 17179:2018 (E)Care should be taken to avoid positioning of boxes and components near to any exhaust systems or any o

40、ther potential contaminations such as diesel oil.When boxes and components require specific transportation practices, the manufacturer should notify the customer of the procedures to be used.NOTE Attention is drawn to the need to confirm to national and/or local transport regulations.5.3 HandlingWhe

41、n handling box and components, care should be taken to prevent damage.When box and components are to be handled individually, they should be lifted, lowered and carried in a controlled fashion and should never be thrown, dropped or dragged.When loading or unloading box and components with forklift e

42、quipment, only forklift trucks with smooth or suitably protected forks should be used. Care should be taken to ensure that forks do not impact box and components when lifting.The impact resistance of thermoplastics boxes is reduced at low temperatures; under these conditions, more care should be tak

43、en during handling. Where cold conditions are expected, the advice of the manufacturer should be sought.NOTE In general cold conditions are considered if temperatures are lower than 5 C.5.4 StorageAny storage instructions from the manufacturer and the requirements of the appropriate product standard

44、s shall be adhered to.All products should be stored in such a manner to keep them clean and avoid contamination or degradation.Excessive stacking heights should be avoided so that boxes and components in the lower part of the stacks are not overloaded and/or the stack becomes unstable. Stacks of box

45、es should not be placed close to open excavations. Strapping bands should not cause damage or deformation of the boxes or components.Stack the boxes on reasonably flat surfaces free from sharp objects, stones or projections in order to avoid localized deformation or damage to the products.Boxes and

46、components should be stored on supports in very cold weather to avoid freezing to the ground.Storage in direct sunlight for long periods and/or high temperatures can affect the performance of the products and should be avoided.The fading of the colour caused by outside storage does not affect the me

47、chanical properties of products.If boxes, box components and ancillary components are supplied in packaging, the restraints and/or packaging should be removed as late as possible prior to installation.6 Installation6.1 Behaviour of reservoirsThere are several methods of structural design (see nation

48、al standards and guidance) that are used to calculate the long-term performance of reservoirs.8 PD CEN/TR 17179:2018CEN/TR 17179:2018 (E)The use of the installation procedures detailed in this Technical Report and the manufactures instructions together with the structural design methods will ensure

49、an optimal performance of the reservoirs.In general, vehicular traffic is not allowed on unpaved surfaces in the zone of influence of the reservoir unless calculations prove otherwise.6.2 Design considerations6.2.1 GeneralIt is essential to determine the soil conditions that relate to excavation construction and reservoir installation prior to construction; the native soil and the backfill material should be classified in accordance with Annex A. The classification is then used to choose a suitable type of installation in accordance with 6.2.2.The classi