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The aim of this study is to provide a new method to assess the interaction between sandy soil and buried pipeline in the presence of strike slip faulting. To that end, two full-scale experiments were carried out on steel and polyethylene pipes. Using ABAQUS and an optimization algorithm, the stiffness of the equivalent transverse spring of the soil was calculated so that the deformation of the pipe would have the highest agreement with the experimental results. The results showed that the specifications of the equivalent pipe-soil spring are highly dependent upon the material of the pipe, a fact which has not been considered in design codes. The initial stiffness and the maximum pipe-soil interaction force for both the steel and polyethylene pipes were calculated and compared to the criteria presented by ASCE and ALA standards. The maximum pipe-soil interaction force in steel pipe test was obtained to be 70% higher than ASCE Guideline given value while in HDPE pipe test it was about 80% lower than code’s value. This fact demonstrates the importance of pipe material on lateral pipe-soil interaction.

New Method to Evaluate the Buried Pipeline– Sandy Soil Interaction Subjected to Strike Slip Faulting