ISO TR 10465-2-2007 Underground installation of flexible glass-reinforced pipes based on unsaturated polyester resin (GRP-UP) - Part 2 Comparison of static calc.pdf

1、 Reference number ISO/TR 10465-2:2007(E) ISO 2007TECHNICAL REPORT ISO/TR 10465-2 Second edition 2007-09-01 Underground installation of flexible glass-reinforced pipes based on unsaturated polyester resin (GRP-UP) Part 2: Comparison of static calculation methods Installation enterre de canalisations

2、flexibles renforces de fibres de verre base de rsine polyester insature (GRP-UP) Partie 2: Comparaison de mthodes de calcul statique ISO/TR 10465-2:2007(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but

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7、9 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2007 All rights reservedISO/TR 10465-2:2007(E) ISO 2007 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope 1 2 Normative references 1 3 Symbols and abbreviated terms 1 4 Soil-load distribution.10 5

8、Soil load 10 5.1 General10 5.2 Initial loadings10 5.3 Long-term loading .15 6 Traffic loads15 6.1 General15 6.2 AWWA procedure 16 6.3 ATV procedure .18 7 Deflections20 7.1 Resulting from vertical load .20 7.2 Aspects not covered by AWWA or ATV 26 7.3 Irregularities in the installation 26 8 Circumfer

9、ential bending strain.27 8.1 AWWA procedure 27 8.2 ATV procedure .27 9 Buckling29 9.1 General29 9.2 AWWA procedure 29 9.3 ATV procedure .31 10 Internal-pressure effects.34 10.1 General34 10.2 Pressure strain.34 10.3 Combined loading34 10.4 Calculations based on stress .35 Bibliography 36 ISO/TR 1046

10、5-2:2007(E) iv ISO 2007 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member

11、 body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Elect

12、rotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopte

13、d by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. In exceptional circumstances, when a technical committee has collected data of a different kind from that whi

14、ch is normally published as an International Standard (“state of the art”, for example), it may decide by a simple majority vote of its participating members to publish a Technical Report. A Technical Report is entirely informative in nature and does not have to be reviewed until the data it provide

15、s are considered to be no longer valid or useful. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO/TR 10465-2 was prepared by Technical Committee

16、ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 6, Reinforced plastics pipes and fittings for all applications. This second edition cancels and replaces the first edition (ISO/TR 10465-2:1999), which has been technically revised to take into account chang

17、es made to methods in base documents ATV-A 127 and AWWA M-45 (see Introduction). ISO 10465 consists of the following parts, under the general title Underground installation of flexible glass- reinforced pipes based on unsaturated polyester resin (GRP-UP): Part 1: Installation procedures Technical Sp

18、ecification Part 2: Comparison of static calculation methods Technical Report Part 3: Installation parameters and application limits Technical Report ISO/TR 10465-2:2007(E) ISO 2007 All rights reserved v Introduction Work in ISO/TC 5/SC 6 (now ISO/TC 138) on writing International Standards for the u

19、se of glass-reinforced plastics (GRP) pipes and fittings was approved at the subcommittee meeting in Oslo in 1979. An ad hoc group was established and the responsibility for drafting various International Standards was later given to a Task Group (now ISO/TC 138/SC 6). At the SC 6 meeting in London

20、in 1980, Sweden proposed that a working group be formed to develop documents regarding a code of practice for GRP pipes. This was approved by SC 6, and Working Group 4 (WG 4) was formed for this purpose. Since 1982, many WG 4 meetings have been held which have considered the following matters: proce

21、dures for the underground installation of GRP pipes; pipe/soil interaction with pipes having different stiffness values; minimum design parameters; overview of various static calculation methods. During the work of WG 4, it became evident that unanimous agreement could not be reached within the work

22、ing group on the specific methods to be employed to address these issues. It was therefore agreed that all parts of the code of practice should be made into a type 3 Technical Report, and this was the form in which this part of ISO 10465 was first published in 1999. Since then the ISO rules dealing

23、with the classification of document types have been revised and this has resulted in the three parts of ISO 10465 now being published as either a Technical Specification or a Technical Report. ISO 10465-1, published as Technical Report in 1993 and revised as a Technical Specification in 2007, descri

24、bes procedures for the underground installation of GRP pipes. It concerns particular stiffness classes for which performance requirements have been specified in at least one product standard, but it can also be used as a guide for the installation of pipes of other stiffness classes. This part of IS

25、O 10465, published as a Technical Report in 1999 and revised in 2007, presents a comparison of the two primary methods used internationally for static calculations on underground GRP pipe installations. These methods are a) the ATV method given in ATV-A 127, Guidelines for static calculations on dra

26、inage conduits and pipelines, and b) the AWWA method given in AWWA manual M-45, Fiberglass pipe design. ISO 10465-3, published as a Technical Report in 2007, gives additional information, which is useful for static calculations primarily when using an ATV-A 127 type design system in accordance with

27、this part of ISO 10465, on items such as: parameters for deflection calculations; soil parameters, strain coefficients and shape factors for flexural-strain calculations; soil moduli and pipe stiffness for buckling calculations with regard to elastic behaviour; parameters for rerounding and combined

28、-loading calculations; ISO/TR 10465-2:2007(E) vi ISO 2007 All rights reservedthe influence of traffic loads; the influence of sheeting; safety factors. This Technical Report is not to be regarded as an International Standard. It is proposed for provisional application so that experience may be gaine

29、d on its use in practice. Comments should be sent to the secretariat of TC 138/SC 6. TECHNICAL REPORT ISO/TR 10465-2:2007(E) ISO 2007 All rights reserved 1 Underground installation of flexible glass-reinforced pipes based on unsaturated polyester resin (GRP-UP) Part 2: Comparison of static calculati

30、on methods 1 Scope This part of ISO 10465 presents a comparison of the ATV and AWWA methods for static calculations on underground GRP pipe installations. It is intended that this comparison will encourage the use of both procedures for GRP pipes conforming to International Standards. It is not the

31、intent of this part of ISO 10465 to cover all the details of the two methods. Some aspects are, of necessity, very complex, and for a full understanding the original documents need to be studied in detail. Rather, the intention is to give a general overview and comparison of the key elements so that

32、 the user can more easily understand and appreciate the differences between the two procedures and their similarities. 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 r

33、eferences, the latest edition of the referenced document (including any amendments) applies. ATV-A 127, Guidelines for static calculations on drainage conduits and pipelines, 3rd edition, August 2000 (German Association for Water Pollution Control) AWWA M-45, Fiberglass pipe design manual M-45, 2005

34、 (American Water Works Association) 3 Symbols and abbreviated terms For the purposes of this document, the following symbols apply. NOTE 1 This clause also contains symbols and abbreviations from ISO 10465-1 and ISO 10465-3 for completeness. NOTE 2 Several identical symbols are used in ATV-A 127 and

35、 AWWA M-45 to represent different quantities, and where this occurs, the origin of the symbol is given in the rightmost column. NOTE 3 The format of the symbols listed here has been aligned as far as practicable with the ISO/IEC Directives, part 2, namely they appear in Times New Roman italic font.

36、This format may differ slightly from the format used in ATV-A 127 and AWWA M-45. Symbol Unit Meaning AQL acceptable quality level a effective relative projection a f ageing factor (ATV) ISO/TR 10465-2:2007(E) 2 ISO 2007 All rights reserveda f distribution factor (AWWA) B1, B2, B3, B4 embedment condi

37、tions b m trench width at spring-line b m distance from trench wall to pipe (see Figure 1) C n buckling scalar calibration factor c 1 , c 2 , c 3 , c 4 coefficients used to determine c 4 reduction factor c f creep factor h,qv v,qh v,qh* h,qh h,qh* v,qv , cccccc deformation coefficients v* v,qh* h,qh

38、* v* , cccc D mm mean pipe diameter D f shape factor D g shape adjustment factor D L deflection lag factor D pr% compaction (based on simple proctor) d em external pipe diameter d im internal pipe diameter d mm mean pipe diameter ( ) e 1000 de d vmm vertical deflection d vAmm maximum permissible lon

39、g-term deflection d vRmm vertical deflection at rupture () vm permissible dd % maximum permissible relative vertical deflection ( ) vm initial dd % initial vertical deflection ( ) vm 50 dd % long-term (50 year) vertical deflection ( ) vm ult dd % ultimate long-term vertical deflection o t,wet , p EE

40、 E E N/m 2apparent flexural moduli of pipe wall 1234sss , 2 0 , , E EEEEEEE E N/m 2soil deformation moduli E THN/m 2 tensile hoop modulus e mm pipe wall thickness e base of natural logarithms (2,718 281 8) F compaction factor ISO/TR 10465-2:2007(E) ISO 2007 All rights reserved 3 F A , F EkN wheel lo

41、ads FS calculated safety factor (ATV) FS design factor = 2,5 (AWWA) FS b bending safety factor FS pr pressure safety factor f 1 reduction factor for creep f 2 reduction factor for ground water in pipe zone G1, G2, G3, G4 soil groups HDB extrapolated pressure strain at 50 years H EVDm environmental d

42、epth of cover h m depth of cover to top of pipe h int m depth at which load from wheels interact h wm height of water surface above top of pipe I m 4 /m second moment of area in longitudinal direction per unit length (of a pipe) I f impact factor (AWWA) i fN/mm 2installation factor K * coefficient f

43、or bedding reaction pressure K modulus of deformation K 1 , K 2 ratio of horizontal to vertical soil pressure in soil zones 1 and 2 K 3 ratio of horizontal to vertical soil pressures in pipe-zone backfill, when backfill is at top of pipe (see ISO 10465-3:2007, Annex A) k v2 reduction factor to take

44、into account the elastic-plastic soil mass law and preliminary deflections k x bedding coefficient L 1m load width parallel to direction of travel L 2 m load width perpendicular to direction of travel LLDF live load as a function of depth factor M sum of bending moments M p multiple presence factor

45、M sN/m 2 composite constrained-soil modulus ISO/TR 10465-2:2007(E) 4 ISO 2007 All rights reservedM s1N/m 2 value of composite constrained-soil modulus from ISO 10465-3:2007, Table A.3 M s100N/m 2 composite constrained-soil modulus at 100 % SPD M sbN/m 2 backfill soil constrained modulus M snN/mm 2 n

46、ative soil constrained modulus qv qh qh* , mmm moment factors N sum of normal forces n 10 number of blows P N magnitude of wheel load PN nominal pressure (pipe characteristic) P bar internal pressure P f probability of failure P vMPa (N/mm 2 ) internal under-pressure P wN/m 2 working pressure P(X) p

47、robability function P 50bar long-term (50 year) failure pressure p N/m 2 soil stress resulting from traffic loads p EN/mm 2 pressure due to prismatic soil load p e N/mm 2 external water pressure p FN/m 2 soil stress due to traffic load according to Boussinesq p oN/m 2 soil pressure due to uniformly

48、distributed surface load p vN/mm 2 soil pressure resulting from traffic load q aMPa (N/mm 2 ) permissible buckling pressure q cMPa (N/mm 2 ) critical buckling pressure q clMPa (N/mm 2 ) critical buckling pressure under sustained load c*w q N/mm 2 horizontal bedding reaction for pipe and contents q h

49、 , q vN/mm 2 horizontal or vertical soil pressure on pipe h* q N/mm 2 horizontal bedding reaction pressure hLT q N/mm 2 reduced long-term horizontal soil pressure h,50 q N/mm 2 long-term (50 year) horizontal soil pressure vLT q N/mm 2 reduced long-term vertical soil pressure ISO/TR 10465-2:2007(E) ISO 2007 All rights reserved 5 v,50 q N/mm 2 long-term (50 year) vertical soil pressure vwa q N/mm 2 vertical load due to pi