AS 2566-1982

1 - AS 2566-1982 PLASTICS PIPELAYING DESIGN
4 - PREFACE
5 - CONTENTS
6 - 1 SCOPE.
6 - 2 APPLICATION.
6 - 3 REFERENCED DOCUMENTS.
6 - 4 DEFINITIONS.
6 - 5 NOTATION AND VALUES OF VARIABLES.
9 - 6 DESIGN PARAMETERS.
9 - 6.1 Laying Conditions.
9 - 6.2 Maximum Vertical Diametrical Deflection
9 - 6.3 50-year Creep Modulus of Elasticity
9 - 6.4 Projection Ratio of a Pipe Installed Under Embankment Conditions
9 - 6.5 Density of Fill Material
9 - 6.6 Trench of Unknown Width
9 - 6.7 Minimum Depth of Cover of Plastics Pipes.
10 - 7 PIPELINE DESIGN.
10 - 7.1 Design Procedure.
10 - 7.2 Data Required.
10 - 8 LOADS ON PIPES.
10 - 8.1 External Load on a Pipe Due to Fill Material.
10 - 8.2 Vertical Load on a Pipe Due to Superimposed Static, Uniformly Distributed Load.
10 - 8.3 Vertical Load on a Pipe Due to Superimposed Concentrated Load.
10 - 8.4 Impact Factors.
11 - 9 COMBINED EXTERNAL LOADING AND INTERNAL PRESSURE.
11 - 10 CALCULATION OF EXTERNAL LOAD CAPACITY OF PIPE.
11 - 10.1 Deflection
11 - 10.2 Deflection Lag Factor
11 - 10.3 Bedding Constant
11 - 10.4 Modulus of Soil Reaction
17 - APPENDIX A - FORMULAS FOR CALCULATION OF VERTICAL LOADS OF PIPES DUE TO FILL MATERIAL
17 - A1 TRENCH CONDITION.
17 - A2 POSITIVE PROJECTION EMBANKMENT CONDITION.
18 - A3 NEGATIVE PROJECTION EMBANKMENT CONDITION.
18 - A4 WIDE TRENCH CONDITION.
19 - APPENDIX B - STANDARD INSTALLATION CONDITIONS
19 - B1 TRENCH AND NEGATIVE PROJECTION CONDITIONS: TYPE 1 INSTALLATION (COMPACTED) - EARTH AND ROCK FOUNDATIONS.
20 - B2 TRENCH AND NEGATIVE PROJECTION CONDITIONS: TYPE 2 INSTALLATION (TAMPED) - EARTH AND ROCK FOUNDATIONS.
21 - B3 TRENCH AND NEGATIVE PROJECTION CONDITIONS: TYPE 3 INSTALLATION (UNCOMPACTED) - EARTH FOUNDATION.
22 - B4 TRENCH AND NEGATIVE PROJECTION CONDITIONS: TYPE 3 INSTALLATION (UNCOMPACTED) - ROCK FOUNDATION.
23 - B5 POSITIVE PROJECTION AND WIDE TRENCH CONDITIONS: TYPE 1 INSTALLATION (COMPACTED) - EARTH AND ROCK FOUNDATION.
23 - B6 POSITIVE PROJECTION AND WIDE TRENCH CONDITIONS: TYPE 2 INSTALLATION (TAMPED) EARTH AND ROCK FOUNDATION.
24 - B7 POSITIVE PROJECTION AND WIDE TRENCH CONDITIONS: TYPE 3 INSTALLATION (UNCOMPACTED) - EARTH FOUNDATION.
25 - B8 POSITIVE PROJECTION AND WIDE TRENCH CONDITIONS: TYPE 3 INSTALLATION (UNCOMPACTED) - ROCK FOUNDATION.
26 - APPENDIX C - SAMPLE CALCULATIONS
26 - C1 EXAMPLE OF CALCULATION OF SAFE BEDDING DEPTH.
26 - C2 CALCULATION FOR UPVC PIPE.
27 - C3 CALCULATION FOR POLYETHYLENE TYPE 50 PIPE.

Sets out design practice for vertical deflections up to recommended safe design limit of 5 percent of OD, for plastics pipes laid underground, and includes methods for calculating loads, safe bedding depths and deflections under a range of laying conditions. Formulas for calculation of vertical loads due to fill material, and installation conditions and design constants, are described and illustrated in appendices.

This standard sets out design practice for calculating loads, safe bedding depths, and vertical deflections for plastics pipes laid under a number of specified standard underground installation conditions. It applies to pipes with outside diameter 75 mm and above and vertical deflection not greater than 5 percent of the outside diameter. For pipe sizes below this, the safe burial calculated by this standard for the 75 mm outside diameter pipe size may be used. This standard applies to the use of smooth circular pipes made from UPVC or polyethylene. It can also apply to pipes of other plastics materials by the substitution of appropriate values in Tables 1, 2, 3, 5, and 6 for the particular pipe material.

Under Revision See DR 94114