AS 3725-1989

1 - AS 3725-1989 LOADS ON BURIED CONCRETE PIPES
4 - PREFACE
5 - CONTENTS
6 - 1 SCOPE.
6 - 2 APPLICATION.
6 - 3 REFERENCED DOCUMENTS.
6 - 4 DEFINITIONS.
7 - 5 NOTATION.
9 - 6 VERTICAL LOADS ON PIPES.
9 - 6.1 Types of loading.
9 - 6.2 Data required.
9 - 6.3 Working dead loads due to fill or in- situ materials.
9 - 6.3.1 General.
9 - 6.3.2 Trench condition.
10 - 6.3.3 Embankment condition (positive projection)
10 - 6.3.4 Embankment condition (negative projection or induced trench)
10 - 6.3.5 Settlement ratio.
10 - 6.3.6 Multiple pipes.
10 - 6.3.7 Jacked or bored pipes.
10 - 6.4 Working loads due to superimposed dead loads.
15 - 6.5 Working loads due to superimposed live loads.
15 - 6.5.1 General.
15 - 6.5.2 Road vehicle loads.
17 - 6.5.3 Railway loading.
17 - 6.5.4 Aircraft loads.
17 - 6.5.5 Construction and other equipment loads.
17 - 7 INTERNAL WATER LOADS.
17 - 8 COMPACTION.
18 - 9 PIPE SUPPORT AND BEDDING FACTORS.
18 - 9.1 General.
18 - 9.1.1 Pipe supports.
18 - 9.1.2 Bedding factors.
18 - 9.2 Support types.
18 - 9.2.1 Type U support
19 - 9.2.2 Type H support
20 - 9.2.3 Type HS support
20 - 9.3 Bedding factors for dead loads.
20 - 9.3.1 General
20 - 9.3.2 Reduction of bedding factors.
20 - 9.3.3 Jacked or bored pipes.
20 - 10 TEST LOADS.
20 - 10.1 General.
20 - 10.2 Test loads for reinforced pipes not subject to internal pressure.
21 - 10.3 Test load for unreinforced pi pes not subject to internal pressure.
21 - 10.4 Test loads for reinforced pipes subject to internal pressure.

Sets out acceptable methods for calculating the vertical working (service) loads, resulting from overlying materials and superimposed dead and live loads, which act on buried concrete pipes. Users are also referred to AS 4058-1992 Precast concrete pipes.

This Standard sets out methods and provides data for-(a) calculating the vertical working loads on buried concrete pipes due to-(i) the materials covering the pipes; and(ii) superimposed loads; and(b) relating the minimum test cracking load to be applied to sample concrete pipes, in accordance with AS 1342 and AS 1392, to the calculated vertical working loads on concrete pipes installed under particular conditions, including that of combined vertical load plus internal pressure.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.

Under Revision See DR 97281