Abstract
A numerical modelling technique for the estimation of as-laid pipeline embedment in clayey sediments is introduced in the paper. The process of pipe-laying is modelled numerically with the pipe-soil interaction defined using a nonlinear elasto-plastic model, therefore the soil resistance contributed by soil buoyancy can be well considered in the evaluation of as-laid pipeline embedment. The impact of the soil buoyancy in the estimate of as-laid embedment is then quantitatively assessed using the proposed numerical modelling technique, and the results show that the as-laid pipeline embedment can be significantly overestimated if the soil buoyancy is ignored in the analysis.
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