Finite element modelling for as-laid embedment of pipeline in clayey sediments
L Zhao, D Wang, Y Tian
Ocean Engineering | Elsevier | Published : 2020
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.
Awarded by National Natural Science Foundation of China
The second author would like to acknowledge funding from the National Natural Science Foundation of China (through the grants of No. U1806230 and 41772294).