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1、BRITISH STANDARD BS EN 1295-1:1998 Incorporating Corrigendum No. 1 Structural design of buried pipelines under various conditions of loading Part 1: General requirements The European Standard EN 1295-1:1997 has the status of a British Standard ICS 23.040.01 ? Licensed Copy: sheffieldun sheffieldun,
2、na, Sat Oct 28 06:50:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 1295-1:1998 This British Standard, having been prepared under the direction of the Sector Board for Building and Civil Engineering, was published under the authority of the Standards Board and comes into effect on 15 June 1998
3、BSI 2006 ISBN 0 580 29149 9 National foreword This British Standard is the official English language version of EN 1295-1:1997 published by the European Committee for Standardization (CEN). A list of organizations represented on this subcommittee can be obtained on request to its secretary. The Euro
4、pean Standard EN 1295-2 will in due course incorporate the calculation procedures for structural design of buried pipelines of all CEN member countries. As the UK mirror committee is in agreement on the format and content of the UK calculation procedure it has been decided to include it as an inform
5、ative national annex in this Part. This will allow the UK pipe industry an early opportunity to view the procedure. NOTE. The terms and clause numbers in the key to figure 1 refer to EN 1610. The attached national annex comprises the calculation procedure for the structural design of buried pipeline
6、s as practised in the UK. In due course this annex will be incorporated in EN 1295-2, together with other CEN member countries procedures. As the UK submission has been agreed, the BSI committee has included it to allow the UK pipe industry an early opportunity to view the calculation procedure. Cro
7、ss-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of
8、 British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; p
9、resent to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an i
10、nside front cover, the EN title page, pages 2 to 34, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments 16110 Corrigendum No. 1 31 May 2006Corrections to Nat
11、ional Annex The UK participation in its preparation was entrusted by Technical Committee B/505, Wastewater engineering, to Subcommittee B/504/505/1, General requirements for pipes and fittings, which has the responsibility to: Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 06:50:42 GMT+00:00
12、 2006, Uncontrolled Copy, (c) BSI CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN natio
13、nal Members. Ref. No. EN 1295-1 : 1997 E EUROPEAN STANDARDEN 1295-1 NORME EUROPE ENNE EUROPA ISCHE NORM July 1997 ICS 23.040.01 Descriptors: Sanitation, water supply, water removal, water pipelines, buried pipes, pressure pipes, sewage, computation, mechanical strength, loads: forces English version
14、 loading Part 1: General requirements Calcul de re sistance me canique des canalisations enterre es sous diverses conditions de charge Partie 1: Prescriptions ge ne rales Statische Berechnung von erdverlegten Rohrleitungen unter verschiedenen Belastungsbedingungen Teil 1: Allgemeine Anforderungen Th
15、is European Standard was approved by CEN on 1997-06-29. 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
16、 concerning such national standards 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 translation under the responsibility of a CEN member into it
17、s own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain
18、, Sweden, Switzerland and United Kingdom. Structural design of buried pipelines under various conditions of Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 06:50:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN 1295-1 : 1997 Foreword This European Standard has been prepared by Technica
19、l Committee CEN/TC 165, Waste water engineering, the Secretariat of which is held by DIN. 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 January 1998, and conflicting national standards shall be w
20、ithdrawn at the latest by January 1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Ita
21、ly, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. This standard is intended for use in conjunction with the series of product standards covering pipes of various materials for the water industry. This standard comprises two Parts: Part 1: General requi
22、rements, dealing with the requirements for structural design of pipelines and giving the basic principles of the nationally established methods of design; Part 2: Summary of the nationally established methods of design, giving an overview of these methods as prepared by the various countries where t
23、hey are in use. Contents Page Foreword2 0Introduction3 1Scope3 2Normative references3 3Definitions3 3.1Installation terms3 3.2Design terms4 4Requirements4 5Basis of design procedures4 5.1General4 5.2External loads5 5.3Limit states5 5.4Longitudinal effects5 6Additional considerations for pressure pip
24、elines5 6.1General5 6.2Stresses and strains resulting from simultaneous loads5 6.3Effect of pressure on deformation6 6.4Buckling of pressure pipes6 6.5Thrusts and longitudinal stresses6 7Influence of construction procedures6 7.1General6 7.2Trenching procedures6 7.3Pipe bedding6 7.4Filling procedures
25、7 8Design philosophies and factors of safety7 Annexes A(informative) Pipe definition according to cross-sectional behaviour7 B(informative) Nationally established methods of design7 B.1Identification of methods and addresses where they are available8 B.1.1Austria8 B.1.2Belgium8 B.1.3Denmark8 B.1.4Fi
26、nland8 B.1.5France8 B.1.6Germany8 B.1.7Netherlands9 B.1.8Norway9 B.1.9Spain9 B.1.10 Sweden9 B.1.11 Switzerland10 B.1.12 United Kingdom10 B.2Description of methods11 B.2.1Austria11 B.2.2Belgium12 B.2.3Denmark12 B.2.4Finland13 B.2.5France14 B.2.6Germany14 B.2.7Netherlands15 B.2.8Norway15 B.2.9Spain15
27、B.2.10 Sweden16 B.2.11 Switzerland17 B.2.12 United Kingdom17 BSI 2006 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 06:50:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 1295-1 : 1997 1Surface 2Bottom of road or railway construction, if any 3Trench walls 4Main backfill (3.6) 5Initia
28、l backfill (3.5) 6Sidefill (3.12) 7Upper bedding 8Lower bedding 9Trench bottom 10 Depth of cover (3.3) 11 Depth of bedding (3.1) 12 Depth of embedment (3.4) 13 Trench depth (3.13) aDepth of lower bedding bDepth of upper bedding cDepth of initial backfill NOTE. The terms in figure 1 are the same as i
29、n prEN 1610. Figure 1. Trench installation 0 Introduction The structural design of buried pipelines constitutes a wide ranging and complex field of engineering, which has been the subject of extensive study and research in many countries over a period of many years. Whilst many common features exist
30、 between the design methods which have been developed and established in the various member countries of CEN, there are also differences reflecting such matters as geological and climatic variations, as well as different installation and working practices. In view of these differences, and of the ti
31、me required to develop a common design method which would fully reflect the various considerations identified in particular national methods, a two stage approach has been adopted for the development of this European Standard. In accordance with this two stage approach, the joint working group, at i
32、ts initial meeting, resolved first to produce an EN giving guidance on the application of nationally established methods of structural design of buried pipelines under various conditions of loading, whilst working towards a common method of structural design. This standard represents the implementat
33、ion of the first part of that resolution. 1 Scope This standard specifies the requirements for the structural design of water supply pipelines, drains and sewers, and other water industry pipelines, whether operating at atmospheric, greater or lesser pressure. In addition, this standard gives guidan
34、ce on the application of the nationally established methods of design declared by and used in CEN member countries at the time of preparation of this standard. This guidance is an important source of design expertise, but it cannot include all possible special cases, in which extensions or restricti
35、ons to the basic design methods may apply. Since in practice precise details of types of soil and installation conditions are not always available at the design stage, the choice of design assumptions is left to the judgement of the engineer. In this connection the guide can only provide general ind
36、ications and advice. This Part of the standard specifies the requirements for structural design and indicates the references and the basic principles of the nationally established methods of design (see annexes A and B). 2 Normative references This European Standard incorporates, by dated or undated
37、 reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of the publications apply to this European Standard only when incor
38、porated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies. prEN 1610 Construction of pipelines for drains and sewers 3 Definitions For the purposes of this standard, the following definitions apply (see also annex A). 3.1 Installation t
39、erms Installation terms are given in figure 1. The same terms apply for embankment installations and for trenches with sloping sides. BSI 2006 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 06:50:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 1295-1 : 1997 3.1.1 compaction Deliberat
40、e densification of soil during the construction process. 3.1.2 consolidation Time-dependent densification of soil by processes other than those deliberately applied during construction. 3.1.3 embedment Arrangement and type(s) of material(s) around a buried pipeline which contribute to its structural
41、 performance. 3.2 Design terms 3.2.1 bedding factor Ratio of the maximum design load for the pipe, when installed with a particular embedment, to the test load which produces the same maximum bending moment. 3.2.2 design pressure (DP) Maximum operating internal pressure of the system or of the press
42、ure zone fixed by the designer considering future developments but excluding surge. 3.2.3 load bearing capacity Load per unit length that a particular combination of pipe and embedment can sustain without exceeding a limit state. 3.2.4 maximum design pressure (MDP) Maximum operating internal pressur
43、e of the system or of the pressure zone fixed by the designer considering future developments and including surge, where: MDP is designated MDPa when there is a fixed allowance for surge; MDP is designated MDPc when the surge is calculated. 3.2.5 silo effect Effect whereby lateral earth pressure in
44、trench backfill causes friction at the trench wall to carry part of the weight of the backfill. 3.2.6 soil-structure interaction Process whereby the deformations of soil and/or pipe caused by the contact and reaction pressures between a pipe and the surrounding soil distribute the pressures to achie
45、ve equilibrium. 3.2.7 system test pressure (STP) Hydrostatic pressure applied to a newly laid pipeline in order to ensure its integrity and tightness. 4 Requirements 4.1 All pipelines shall be designed to withstand the various loadings to which they are expected to be subjected, during construction
46、and operation, without detriment to their function and to the environment. 4.2 The future owner of the pipeline is free to specify the appropriate method of design to be adopted. 4.3 The designer shall determine whether or not the pipeline comes within the scope of the methods covered by this standa
47、rd. 4.4 The design adopted shall be such that construction may be carried out safely and so as to ensure that the design assumptions regarding the influence of construction procedures and soil characteristics will be satisfied. 4.5 Subject to the other requirements of clause 4, design should be carr
48、ied out preferably using in its entirety one of the methods in annex B of this standard. 4.6 Methods of design, in accordance with annex B, when presented in the form of tables, charts or computer programmes, shall be deemed equivalent to a full calculation, provided that any simplification does not
49、 reduce the level of safety to below that which would be obtained by full design. Outputs from computer programmes shall be capable of verification. 4.7 Where a design method other than one of those in annex B is employed, the designer shall satisfy himself that the method constitutes a coherent system and provides the level of safety required. 4.8 Account shall be taken of the probable consequences of pipeline failure in establishing the acceptable level of safety. 4.9 The values a
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