Abstract
A study of the required depth of cover of a pipeline to prevent flotation when the pipeline is submerged below the ground water table in sandy soil has been carried out. This study includes consideration of the shear stresses that may be mobilized in the overburden soil. Comparisons between these calculated depths of cover at which pipeline flotation may occur and those observed experimentally were made. Reasonable agreement was obtained provided the calculation was carried out in a particular way. The phenomenon known as pipeline jacking was also examined experimentally. It was found that pipeline jacking did not occur unless large voids were purposely left beneath the pipe and the overburden material was loosely placed around the pipe.
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