CEN/TR 1295-3:2007
(Main)Structural design of buried pipelines under various conditions of loading - Part 3: Common method
Structural design of buried pipelines under various conditions of loading - Part 3: Common method
This document specifies calculation methods for the structural design of water supply pipelines, drains and sewers, and other water industry pipelines, whether operating at atmospheric, greater or lesser pressure.
It applies for the structural design of buried piping systems, made from all materials used for the conveyance of fluids under pressure or gravity conditions.
Pipes to be designed for installations in abnormal or unusual conditions, e.g. in quick soils or a marine sea bed, are not covered by this document, it may require special engineering.
The design of very large diameter pipe installations may require considerations to be given to other additional parameters, e.g. the homogeneity of the surrounding soil.
The design method is intended to be used for pipes operating at different temperatures provided that the corresponding temperature re-rating factors for the relevant pipe properties are used as specified in the referring standard(s). Nevertheless, high services temperatures may require an additional analysis of the longitudinal stresses and strains and/or a special design of the joints.
Statische Berechnung von erdverlegten Rohrleitungen unter verschiedenen Belastungsbedingungen - Teil 3: Einheitliches Berechnungsverfahren
Calcul de résistance mécanique des canalisations enterrées sous diverses conditions de charge - Partie 3: Méthode commune
Le présent document spécifie les méthodes de calcul pour le calcul de résistance mécanique des conduites d'alimentation en eau, des canalisations d'évacuation et d'assainissement et autres canalisations de l'industrie de l'eau, fonctionnant soit à la pression atmosphérique, soit à des pressions supérieures ou inférieures.
Il s'applique au calcul de résistance mécanique des systèmes de canalisations enterrées, fabriqués à partir de tous les matériaux utilisés pour l'acheminement des fluides, sous pression ou dans des conditions gravitaires.
Les tuyaux devant être calculés pour des installations dans des conditions anormales ou inhabituelles, par exemple dans des sols boulants ou sous la mer, ne sont pas couverts par le présent document et l'utilisation d'une étude spéciale peut s'avérer indispensable.
Le calcul d'installations de tuyaux de très gros diamètres peut exiger la prise en compte d'autres paramètres additionnels, comme par exemple l'homogénéité du sol environnant.
La méthode de conception est censée être employée pour des tuyaux exploités à différentes températures à condition que les coefficients correspondants de réévaluation de la température pour les propriétés concernées du tuyau soient utilisés de la manière spécifiée dans la (les) norme(s) de référence. Néanmoins, les températures de service élevées peuvent exiger une analyse complémentaire des contraintes et des déformations longitudinales et/ou une conception spéciale des assemblages.
Projektiranje vkopanih cevovodov pri različnih pogojih obtežb - 3. del: Skupna metoda
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2007
3URMHNWLUDQMHYNRSDQLKFHYRYRGRYSULUD]OLþQLKSRJRMLKREWHåEGHO 6NXSQD
PHWRGD
Structural design of buried pipelines under various conditions of loading - Part 3:
Common method
Statische Berechnung von erdverlegten Rohrleitungen unter verschiedenen
Belastungsbedingungen - Teil 3: Einheitliches Berechnungsverfahren
Calcul de résistance mécanique des canalisations enterrées sous diverses conditions de
charge - Partie 3: Méthode commune
Ta slovenski standard je istoveten z: CEN/TR 1295-3:2007
ICS:
23.040.01 Deli cevovodov in cevovodi Pipeline components and
na splošno pipelines in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
TECHNICAL REPORT
CEN/TR 1295-3
RAPPORT TECHNIQUE
TECHNISCHER BERICHT
July 2007
ICS 23.040.01
English Version
Structural design of buried pipelines under various conditions of
loading - Part 3: Common method
Calcul de résistance mécanique des canalisations Statische Berechnung von erdverlegten Rohrleitungen
enterrées sous diverses conditions de charge - Partie 3: unter verschiedenen Belastungsbedingungen - Teil 3:
Méthode commune Einheitliches Berechnungsverfahren
This Technical Report was approved by CEN on 11 July 2005. It has been drawn up by the Technical Committee CEN/TC 165.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 1295-3:2007: E
worldwide for CEN national Members.
Contents Page
Foreword.6
Introduction .7
1 Scope .9
2 References.9
3 Structural design issues .9
3.1 Soils .9
3.2 Pipe materials.11
3.3 Types of loading .11
3.3.1 Soil load .11
3.3.2 Traffic load.11
3.3.3 Groundwater.11
3.3.4 Installation loads.11
3.3.5 Internal pressure.11
3.3.6 Pipes own weight.12
3.3.7 Weight of fluid.12
3.3.8 Subsidence (differential settlement).12
3.3.9 Temperature differences.12
3.3.10 Landslide .12
3.3.11 Loading by earthquake .12
4 Principles used in Annex A (Option 1) and Annex B (Option 2) .13
4.1 General.13
4.2 Principles used in Annex A (Option 1) .13
4.2.1 Introduction.13
4.2.2 Information on the content of Annex A (Option 1).13
4.3 Principles used in Annex B (Option 2) .16
5 Synopsis .18
Annex A Structural design of buried pipelines - Option 1.21
A.1 General.21
A.2 Terms and definitions .21
A.3 Symbols .25
A.4 Principle.31
A.5 Installation conditions.33
A.5.1 Geometric parameters.33
A.5.2 Construction procedures.33
A.5.3 Influencing parameters .34
A.5.4 Selection of embedment type.35
A.6 Initial loads .39
A.6.1 Soil load .39
A.6.2 Surface loads .41
A.6.3 Traffic loads.43
A.6.4 Seismic actions.47
A.6.5 Other loads .48
A.7 Soil parameters.48
A.7.1 Soil groups .48
A.7.2 Soil properties.48
A.7.3 Soil pressure ratio .54
A.8 Load distributions.55
A.8.1 General.55
A.8.2 Distribution in circumferential direction.56
A.8.3 Load concentration factors .62
A.9 Loads acting on the pipe .68
A.9.1 General .68
A.9.2 Vertical direction .69
A.9.3 Horizontal direction.70
A.10 Internal pressure .75
A.10.1 General .75
A.10.2 Internal working pressure.75
A.10.3 Internal surge pressure.75
A.11 Pipe deflection .76
A.11.1 General .76
A.11.2 Vertical deflection.76
A.11.3 Horizontal deflection .79
A.12 Analysis of bending moments, normal forces, stresses and strains .80
A.12.1 General .80
A.12.2 Bending moments and normal forces.80
A.12.3 Stresses and/or strains.85
A.13 Longitudinal effects .95
A.14 Stability analysis (only required for flexible pipes) .95
A.14.1 Imperfections .95
A.14.2 Stability analysis with buckling and snap through loads .96
A.15 Calculated factors of safety from the design procedure and analysis.100
A.15.1 General .100
A.15.2 Circumferential direction.100
A.15.3 Longitudinal direction.103
A.16 Minimum factors of safety and failure probability .103
A.16.1 Principles.103
A.16.2 Safety factors against load bearing failure.103
A.16.3 Safety against inadmissible large deflections .104
A.16.4 Safety against failure in case of not predominantly static load .104
Annex AA Classification of soils .105
Annex AB Factors of safety and failure probability.106
Annex AC Soil mechanics background on soil moduli.107
Annex AD General remarks on stability analyses for buried pipes .110
Annex AE Finite element analysis .
...
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