THE MULTISCALE SIMULATIONS OF THE INTERACTION BETWEEN RIGID PIPE AND SOIL IN DENSE SAND
In practical engineering,the relative motion between buried pipelines and surrounding soil can have a significant adverse impact on their structural integrity and service performance.Currently,there is little research on the vertical downward movement of pipe soil interaction.In order to deepen our understanding of the interaction be-tween pipelines and soil during their downward movement relative to the soil,this article uses the multiscale ap-proach coupling the finite element method and the discrete element method to study the mechanical response and failure modes of soil when a rigid pipeline undergoes vertical downward movement relative to sand.The results indi-cate that the bearing capacity and failure modes of soil are significantly affected by the pipeline burial depth.When the pipeline burial depth is shallow,the soil exhibits a general failure mode,while when the pipe is deeply buried,the local failure mode appears.The research conclusions can provide reference significance for evaluating the ser-vice performance of the buried rigid pipelines crossing geological disaster areas in engineering.
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