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Response of Buried Flexible Plastic Conduits Under Loading

by Pratap N. Singh, Miller Consulting Engineers, Sheboygan, WI, USA,



Document Type: Proceeding Paper

Part of: Advances in Underground Pipeline Engineering

Abstract:

Structural performance of 75 mm and 100 mm diameter plastic conduits embedded in Lloyd clay were examined experimentally in a laboratory soil bin, and numerically by the finite element method for various loading conditions. The results of the finite element analyses for deflections of the plastic conduits were compared to the results of the laboratory tests. After determining the magnitude and direction of variation of the finite element solutions from the experimental results, a parametric study on the soil-conduit system was performed, to simulate the actual field situation as closely as possible. The variables studied were the size of the conduits, depth of burial of conduit, bedding angle and soils tangent moduli. Both elastic and elasto-plastic material models were used in the analyses.

Subject Headings: Soil-pipe interaction | Finite element method | Buried pipes | Plastic pipes | Conduits | Pipe materials | Soil analysis

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