Stress and Strain Responses of a Soil-Pipe System to Vehicular Traffic

by H. A. Todres, Inst of Gas Technology, Chicago, IL, USA,
M. McClinton, Inst of Gas Technology, Chicago, IL, USA,



Document Type: Proceeding Paper

Part of: Advances in Underground Pipeline Engineering

Abstract:

A 16-in. natural gas pipeline near Racine, Wisconsin, had been in service for some 30 years. In 1982 road widening operations on a line parallel with the pipe presented the opportunity to instrument the pipeline and measure its response to vehicular loading. One objective of the study was to evaluate the changes in stress and strain of the pipeline and the surrounding soil, caused by vehicular loads. It was found that the use of the Boussinesq solution greatly overestimated the soil response, whereas the use of elastic-layer theory provided satisfactory estimates. The problem of determining the effects of the soil pressure on hoop stress was found to be complex, but a simple approach was used that appears to offer reasonable estimates in the absence of a definitive solution. The field study was supplemented by a laboratory simulation experiment.

Subject Headings: Stress strain relations | Soil stress | Gas pipelines | Vehicles | Soil-pipe interaction | Soil gas | Strain | Wisconsin | United States

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