Numerical Analysis of the Thermal Impact of Parallel Buried Pipelines on Permafrost Foundations

TL;DRAbstract

In permafrost regions, buried oil pipelines have a substantial thermal impact on the surrounding permafrost due to the large temperature difference between the oil and ground. The change in the thermal regime of the permafrost may trigger frost heave and thaw settlement of the pipeline, and can even destroy the pipeline. In this paper, an example of parallel-buried pipelines is performed, and a numerical method is employed to simulate the thermal impact of pipelines on permafrost foundations for both ice-poor and ice-rich permafrost with various kinds of distances between parallel pipelines. The results show that the thermal effect caused by the operation of pipelines can increase the temperature of permafrost, as well as cause the underlying permafrost foundation to thaw gradually. The thermal impact of parallel pipelines on the permafrost foundation depends on the distance between the parallel pipelines, ice content of the permafrost, initial permafrost temperature, and so on. The de

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