1、PUBLISHED DOCUMENT PD CEN/TR 1295-2:2005 Structural design of buried pipelines under loading Part 2: Summary of nationally established methods of design ICS 23.040.01 various conditions of Licensed Copy: Wang Bin, na, Tue Aug 08 03:48:01 BST 2006, Uncontrolled Copy, (c) BSIPD CEN/TR 1295-2:2005 This
2、 Published Document was published under the authority of the Standards Policy and Strategy Committee on 31 May 2006 BSI 2006 ISBN 0 580 48585 4 National foreword This Published Document is the official English language version of CEN/TR 1295-2:2005. The UK participation in its preparation was entrus
3、ted to Technical Committee B/505, Waste water engineering, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related
4、international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be
5、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 British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are r
6、esponsible for its correct application. Compliance with a Published Document does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the CEN/TR title page, pages 2 to 111 and a back cover. The BSI copyright notice disp
7、layed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Licensed Copy: Wang Bin, na, Tue Aug 08 03:48:01 BST 2006, Uncontrolled Copy, (c) BSITECHNICALREPORT RAPPORTTECHNIQUE TECHNISCHERBERICHT CEN/TR12952 August2005 ICS23.040.01
8、EnglishVersion Structuraldesignofburiedpipelinesundervariousconditionsof loadingPart2:Summaryofnationallyestablishedmethodsof design Calculdersistancemcaniquedescanalisations enterressousdiversesconditionsdechargePartie2: Rsumdesmthodesnationalesdedimensionnement StatischeBerechnungvonerdverlegtenRo
9、hrleitungen unterverschiedenenBelastungsbedingungenTeil2: Zusammenstellungnationaleingefhrter Berechnungsverfahren ThisTechnicalReportwasapprovedbyCENon28February2005.IthasbeendrawnupbytheTechnicalCommitteeCEN/TC165. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denma
10、rk,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG Manag
11、ementCentre:ruedeStassart,36B1050Brussels 2005CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.CEN/TR12952:2005:E Licensed Copy: Wang Bin, na, Tue Aug 08 03:48:01 BST 2006, Uncontrolled Copy, (c) BSICEN/TR 1295-2:2005 2 Contents Foreword 4 Introduction
12、5 1 Scope .6 2 Normative references .6 3 Terms and definitions.6 4 Additional details about established methods .6 Annex A (informative) Summary of Methods of different countries.7 A.1 Austria .7 A.1.1 General remarks7 A.1.2 Differences between “option 1“ and NORM B 5012.7 A.1.3 Principles.8 A.2 Bel
13、gium9 A.2.1 General 9 A.2.2 Flowchart.9 A.2.3 Design, equations, tables and charts, symbols and abbreviations 9 A.3 Denmark .21 A.3.1 General 21 A.3.2 Charges .24 A.3.3 Safety .26 A.3.4 Partial safety factors.27 A.3.5 Calculations. 27 A.4 France 29 A.4.1 Scope .29 A.4.2 Original features of the meth
14、od .29 A.4.3 Description 29 A.4.4 Example of calculation .37 A.5 Germany 39 A.5.1 Introduction .39 A.5.2 Types of soil 39 A.5.3 Live loads 40 A.5.4 Effects of the installation on the structural calculation .44 A.5.5 Loading44 A.5.6 Load distribution.45 A.5.7 Pressure distribution at pipe circumferen
15、ce 50 A.5.8 Sectional forces, stresses, strains, deformations51 A.5.9 Dimensioning 52 A.6 Netherlands .56 A.6.1 General 56 A.6.2 Earth load 56 A.6.3 Evenly distributed surface load .57 A.6.4 Traffic loads.57 A.6.5 Heavy transport.57 A.6.6 Loads form external and internal water pressure 58 A.6.7 Ther
16、mal loading 58 A.6.8 Moments and normal forces 59 A.6.9 Calculation model for a concrete pipe 62 A.6.10 Recommended design values69 A.7 Norway.73 A.7.1 Types of loads.73 A.7.2 Soil loads.73 A.7.3 Self weight of pipe 73 A.7.4 Weight of water .74 Licensed Copy: Wang Bin, na, Tue Aug 08 03:48:01 BST 20
17、06, Uncontrolled Copy, (c) BSICEN/TR 1295-2:2005 3 A.7.5 Traffic load.74 A.7.6 Load distribution and bedding reaction74 A.7.7 Safety analysis 74 A.7.8 Structural design.74 A.8 Sweden 75 A.8.1 Design of buried plastic pipes .75 A.8.2 Calculation method for rigid pipes 83 A.9 United Kingdom 86 A.9.1 G
18、eneral description 86 A.9.2 Calculation procedures 86 A.9.3 Rigid pipes.87 A.9.4 Semi-rigid pipes 90 A.9.5 Flexible pipes 93 Bibliography.110 Licensed Copy: Wang Bin, na, Tue Aug 08 03:48:01 BST 2006, Uncontrolled Copy, (c) BSI4 Foreword This Technical Report (CEN/TR 1295-2:2005) has been prepared b
19、y Technical Committee CEN/TC 165 “Wastewater engineering”, the secretariat of which is held by DIN. 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 p
20、atent rights. This Technical Report was prepared by a Joint Working Group (JWG 1) of Technical Committees TC 164, Water supply, the secretariat of which is held by AFNOR, and TC 165, Waste water engineering, the secretariat of which is held by DIN. This Technical Report is intended for use in conjun
21、ction with the series of product standards covering pipes of various materials for the water industry. This Technical Report includes an Informative Annex A in which are included additional details about the nationally established methods of design declared, submitted by and used in member countries
22、, and collated by the Joint Working Group. CEN/TR 1295-2:2005 Licensed Copy: Wang Bin, na, Tue Aug 08 03:48:01 BST 2006, Uncontrolled Copy, (c) BSI5 Introduction The structural design of buried pipelines constitutes a wide ranging and complex field of engineering, which has been the subject of exten
23、sive study and research, in many countries over a period of very many years. Whilst many common features exist 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 va
24、riations, as well as different installation and working practices. In view of these differences, and of the time 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 de
25、velopment of this document. In accordance with this two stage approach, the Joint Working Group, at its initial meeting, resolved “first to produce a document giving guidance on the application of nationally established methods of structural design of buried pipelines under various conditions of loa
26、ding, whilst working towards a common method of structural design“. This document represents the full implementation of the first part of that resolution. CEN/TR 1295-2:2005 Licensed Copy: Wang Bin, na, Tue Aug 08 03:48:01 BST 2006, Uncontrolled Copy, (c) BSI6 1 Scope In addition to EN 1295-1, this
27、Technical Report gives additional guidance when compared with EN 1295-1 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 document (see informative Annex A). This Technical Report is an important source
28、of design expertise, but it cannot include all possible special cases, in which extensions or restrictions 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 assumpti
29、ons is left to the judgement of the engineer. In this connection the document can only provide general indications and advice. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For u
30、ndated references, the latest edition of the referenced document (including any amendments) applies. EN 1295-1, Structural design of buried pipelines under various conditions of loading Part 1: General requirements 3 Terms and definitions For the purposes of this document, the terms and definitions
31、given in EN 1295-1 apply. 4 Additional details about established methods Annex A gives for several countries details about the established methods of design declared, submitted by and used in member countries. CEN/TR 1295-2:2005 Licensed Copy: Wang Bin, na, Tue Aug 08 03:48:01 BST 2006, Uncontrolled
32、 Copy, (c) BSI7 Annex A (informative) Summary of Methods of different countries A.1 Austria A.1.1 General remarks The Austrian Standard norm B 5012:2005 is based on the “option 1“ contained in CEN/TR 1295-3. This “option 1“ had been prepared by the TG1 of the CEN/TC164-165/JWG1 as a result of thorou
33、gh study of the subject and long-lasting consultations carried out from 1992 onwards. Although the design method described in “option 1“ was mainly based on two recognised and well-tested “national methods“, the German ATV-DVWK-A 127 and the (former) Austrian NORM B 5012-1 and 2, some new assumption
34、s had to be incorporated in the re-drafted “option 1“ in order to consider the most recent experience gained in this domain. Therafter, it was of course also necessary to prove the correctness of the newly made assumptions by means of comprehensive field testing. This particular kind of testing was
35、done during the period from 2000 to 2004. The tests results obtained were already incorporated in the NORM B 5012 a revision of the former parts 1 and 2 of this standard. Therefore the NORM B 5012:2005 represents a calculation method which is based on the most recent experience in this field, but it
36、 still complies with the calculation principles elaborated by “JWG 1“ regarding the “option 1“ of CEN/TR 1295-3. A.1.2 Differences between “option 1“ and NORM B 5012 The NORM B 5012 differs in the following points from “option 1“: 1) Two different applications of NORM B 5012 enable to make i) calcul
37、ations for pipe design and ii) back-calculations of failure situations For the pipe design the soil moduli proposed in “option 1“ (Table 4) shall be reduced by the factor 0,5, whereas for back-calculations the unchanged soil moduli from “option 1“ should be used. The purpose for this distinction is
38、the following: The results of calculations for the pipe design should be close to the 95 % fractile of the scattering design values, like deflection, stress or strain. Then the required safety or failure probability is assured by using the safety factors proposed in NORM B 5012. However, for back-ca
39、lculations of failure situations the calculation results should be as close as possible to the mean value of the measured values. 2) Factor f R,GWis changed in NORM B 5012 in comparison to “option 1“ ( compare equation 23 in “option 1“ and NORM B 5012). 3) The soil pressure ratios K 1and K 2are part
40、ly changed (compare Table 11 in “option 1“ and NORM B 5012). CEN/TR 1295-2:2005 Licensed Copy: Wang Bin, na, Tue Aug 08 03:48:01 BST 2006, Uncontrolled Copy, (c) BSI8 4) The recommended support angles vare partly changed (compare Table 13 in “option 1“ and NORM B 5012). 5) In NORM B 5012 the horizon
41、tal bedding stiffness S Bhand factor is calculated in a clearer and easier way than in “option 1“ (compare 8.3.2 in “option 1“ and NORM B 5012). 6) The estimated values of relative initial ovalization v,ioin “option 1“ are reduced in NORM B 5012 by the factor 0,5 (compare Tables 19 and 20 in “option
42、 1“ with Table 18 and 19 in NORM B 5012). 7) In NORM B 5012 it is proposed to use the theory 2 ndorder calculation more consequently than in “option 1“ (in NORM for flexible pipes with deflections greater than 1 % in comparison to 5 % in “option 1“). A.1.3 Principles Like “option 1“, the ATV-DVWK-A
43、127 and the NORM model the calculation system of NORM B 5012 is based on the model of the embedded circular or non circular ring. The pipe-soil interaction is taken into account by the following interpretations: 1) In vertical direction: Using the shear-stiff beam model above the pipe for the calcul
44、ation of the vertical loading due to the earth weight and uniformly distributed surcharge; 2) In horizontal direction: Using the compatibility condition of the horizontal pipe and soil movements taking into account all loads considered in the calculation (e.g. for the calculation of the horizontal b
45、edding reaction pressures). Further descriptions of details about the principles and the calculation method are stated in CEN/TR 1295-3. CEN/TR 1295-2:2005 Licensed Copy: Wang Bin, na, Tue Aug 08 03:48:01 BST 2006, Uncontrolled Copy, (c) BSI9 A.2 Belgium A.2.1 General Calculation procedure of the IS
46、O 2785: Directives for selection of asbestos-cement pipes subject to external loads with or without internal pressure. A.2.2 Flowchart A.2.3 Design, equations, tables and charts, symbols and abbreviations A.2.3.1 Symbols and abbreviations A width of uniform surcharge of small extent, in metres; CEN/
47、TR 1295-2:2005 Licensed Copy: Wang Bin, na, Tue Aug 08 03:48:01 BST 2006, Uncontrolled Copy, (c) BSI10 a distance between two wheels on a single axle of a truck, in metres; B width of trench at the crown of the pipe, in metres; B distance of the spring-line of a pipe from the wall of the trench in w
48、hich it is buried, in metres; h distance between two wheels of two different axles of a truck, in metres; c diagonal distance between two wheels of two different axles of a truck, in metres; C.C 90 earth-load coefficient for a trench with vertical walls; C cload coefficient for superimposed concentr
49、ated moving loads; C dload coefficient for uniform surcharges of small extent; C nload coefficient for uniform surcharges of large extent; C v , C d1 , C v2 , C v3coefficients of vertical deformation of pipe; C h2 , C h3coefficients of horizontal deformation of pipe; d nominal or internal diameter of pipe, in mill
