AS/NZS 3725:2007 3725:2007
A S / N Z S 3 7 2 5 : 2 0 0 7
Australian/New Zealand Standard ™ . m o c . l a b o l g i a s . e r o t s o f n i / / : p t t h t a n o i s r e v l l u f e h t s s e c c A . e l p m a s e g a p 6 e e r f a s i s i h T
Design for installation of buried concrete pipes
AS/NZS 3725:2007
This Joint Australian/New Zealand Standard was prepared by Joint Technical Committee WS-006, Concrete Pipes. It was approved on behalf of the Council of Standards Australia on 07 September 2006 and on behalf of the Council of Standards New Zealand on 15 December 2006. This Standard was published on 23 Ja nuary 2007.
The following are represented on Commit tee WS-006:
. m o c . l a b o l g i a s . e r o t s o f n i / / : p t t h t a n o i s r e v l l u f e h t s s e c c A . e l p m a s e g a p 6 e e r f a s i s i h T
Australasian Railway Association Australian Chamber of Commerce and Industry Brisbane City Council Business New Zealand Cement & Concrete Association of New Zealand Engineers Australia Main Roads Department, QLD Master Builders Australia New Zea lan land d Wa ter and Was Waste te As Assoc sociat iat ion Precast New Zealand University of Tasmania Water Services Association of Australia
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This Standard was issued in draft form for comment as DR 04236.
AS/NZS 3725:2007 3725:2007
Australian/New Zealand Standard ™ . m o c . l a b o l g i a s . e r o t s o f n i / / : p t t h t a n o i s r e v l l u f e h t s s e c c A . e l p m a s e g a p 6 e e r f a s i s i h T
Design for installation of buried concrete pipes
Originated as AS CA33—1962. Revised and designated AS 3725—1989. Jointly revised and redesignated AS/NZS 3725:2007
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© Standards Australia/Standards New Zealand All rig hts are res erv ed. No part of thi s wor k may be rep rod uced or cop ied in any for m or by any means, electronic or mechanical, including photocopying, without the written permission of the publisher. Jointly published by Standards Australia, GPO Box 476, Sydney, NSW 2001 and Standards New Zealand, Private Ba g 2439, Wellington 6020 ISBN 0 7337 7982 4
AS/ NZS 3725 :200 7
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PREFACE
This Standard was prepared by the Joint Standards Australia/Standards New Zealand Committee WS-006, Concrete Pipes, to supersede AS 3725—1989, Loa Loads ds on buri buried ed concrete pipes by a Joint Australian/New Zealand Standard that incorporates current best practice. The objective of the Standard is to enable an appropriate class of concrete pipe, manufactured in accordance with AS 4058, Pre Precast cast con concret cretee pip pipes—p es—press ressure ure and non non- pressur pre ssuree or AS 4139, Fibr Fibree rein reinfor forced ced conc concrete rete pip pipes es,, to be selected for use in belowground installations.
. m o c . l a b o l g i a s . e r o t s o f n i / / : p t t h t a n o i s r e v l l u f e h t s s e c c A . e l p m a s e g a p 6 e e r f a s i s i h T
NOTE : At A t the tim e of pub publica lica tio tion n of thi s Sta ndard ndard,, AS 4058 is und under er rev review iew by the Com mit tee and intended to be replaced by a Joint Australian/New Zealand Standard in due course (to become AS/NZS 4058). In the meantime, for New Zealand applications, all references to AS 4058 throughout this Standard should be deemed to include references to NZS 3107, Specification for precas pre castt concr c oncr ete drai nage and pre pressu ssu re pipe s, as appropriate and applicable.
The Standard provides rules for calculating the working loads on concrete pipes due to fill and superimposed loads and a range of installation options. It relates these to the test loads applied to sample pipes in accordance with the methods of test set out in the product standards. Where a choice is given between an Australian Standard and a New Zealand Standard (for example AS 1289, Meth Methods ods of test testing ing soil soilss for eng enginee ineering ring purp oses and the equivalent NZS NZ S 4402 4 402,, Meth Methods ods of test testing ing soil soilss for civi civill engin e ngineeri eering ng pur purpos poses es), ), the Australian Standard will apply in Australia and the New Zealand Standard will apply in New Zealand. The procedures in the Standard also apply to the calculation of external working loads on concrete pressure pipes. In this case, however, the loads due to internal pressures need to be considered in conjunction with the external loads. The method of assessing the required strength of a pipe under this combination of loads is included in the Standard. AS/NZS 3725 Supp 1 is a Commentary on this Standard. The Comm entary contains additional information and explanations of particular technical aspects of the Standard. It includes, as an appendix, examples of calculations in accordance with this Standard, particularly with reference to the selection of a pipe class from AS 4058, Prec Precast ast conc concrete rete pipes—P pip es—Press ressure ure and non non-pr -press essure ure and AS 4139, Fibr Fibree rein reinfor forced ced conc concrete rete pipe pipess . The Commentary is an informative document and does not for m part of the Standard. Statement expressed in mandatory terms in notes to tables are deemed to be requirements of this Standard.
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AS/ NZS 3725 :200 7
CONTENTS
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SCOPE........................................................................................................................ SCOPE.............................................................................................. .......................... 4
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APPLICATION ............................... ................................................................... ....................................................................... ....................................... .... 4
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REFERENCED DOCUMENTS..................................... DOCUMENTS........................................................................ ............................................. .......... 4
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DEFINITIONS............................................................................................................ DEFINITIONS....................................................................................... ..................... 6
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NOTATION.............................................................................................................. NOTATION..................................................................................... ......................... 11
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VERTICAL LOADS ON PIPES ................................... ....................................................................... ............................................ ........ 13
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INTERNAL WATER LOADS......................................................... LOADS.................................................................................. ......................... 25
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COMPACTION ............................... ................................................................... ....................................................................... ..................................... .. 25
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PIPE SUPPORT AND BEDDING FACTORS.................. FACTORS...................................................... ........................................ .... 25
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TEST LOADS................................... LOADS....................................................................... ....................................................................... ..................................... 32
APPENDICES A CONTROLLED LOW STRENGTH MATERIALS — CLSM CLSM .................................. .................................... .. 33 B SUPERIMPOSED LIVE-LOADS ................................. ..................................................................... ............................................ ........ 35
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AS/ NZS 3725 :200 7
STANDARDS AUSTRALIA/STANDARDS NEW ZEALAND
Australian/New Zealand Standard Design for installation of buried concrete pipes 1 SCOPE
This Standard sets out methods and provides data for the following: (a)
. m o c . l a b o l g i a s . e r o t s o f n i / / : p t t h t a n o i s r e v l l u f e h t s s e c c A . e l p m a s e g a p 6 e e r f a s i s i h T
(b)
Calculating the vertical working loads loads on buried concrete pipes due to to — — (i)
the materials covering the pipes; and
(ii)
superimposed loads.
Relating the minimum proof test load to the selection selection of of appropriate appropriate pipes pipes made in accordance with either AS 4058 or AS 4139, to the calculated vertical working loads on concrete pipes installed under particular conditions, including that of combined vertical ver tical loa load d plus pl us inte internal rnal pres pressur sure. e.
In addition, the Standard classifies types of pipe installation and types of bedding and sets minimum requirements for the soil materials around the pipes and compaction of these materials. NOTE : AS /NZ S 3724 3 724 Sup Supp p 1 is a Com men tar y on thi s Sta ndar ndard. d. It prov provide idess fur furthe therr inf informa orma tio n relevant to many Clauses in this Standard. The Supplement, while bound with the Standard, is informative and does not form an i ntegral part of the Standard. ‘
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2 APPLICATION 2.1 General
This Standard applies to concrete pipes complying with AS 4058 or AS 4139, where they are laid or intended to be laid in one or other of the specified installation conditions. This Standard does not apply to flexible buried pipes. 2.2 Use of other materials or methods
This Standard shall not be interpreted so as to prevent the use of materials or methods of design or construction not specifically referred to herein, provided that such materials or methods can be shown to meet the intent of this Standard. 2.3 Existing structures
Where the strength or serviceability of an existing structure is to be evaluated, the general principles of this Standard may be applied. The actual properties of the materials in the structure shall be used. 3 REFERENCED DOCUMENTS
The following documents are referred to in this Standard: AS 1289 1289.3 128 9.3.4. .4.1 1 1289.3.6.1
Methods of testing soils for engineering purposes Method 3.4.1: Soil classific classification ation tests — Determination Determination of the linear shrinkage of a soil — — Standard Standard method Method 3.6.1: Soil classification classification tests — Determination Determination of the particle size distribution distributio n of a soil — — Standard Standard method of analysis by sieving
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AS/NZS 3725:2007, Design for installation of buried concrete pipes . m o c . l a b o l g i a s . e r o t s o f n i / / : p t t h t a n o i s r e v l l u f e h t s s e c c A . e l p m a s e g a p 6 e e r f a s i s i h T
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