Heat Effect Analysis of Buried Oil Pipeline in the Qinghai-Tibet Plateau

Abstract:

The Geermu-Lasa oil pipeline was located in the Qinghai-Tibet Plateau permafrost regions. The building and operating of pipeline will change the temperature field of soil around it, which can lead to changes of frozen soil mechanic properties, and this will induces deformation or even fracture of pipeline. These phenomena will affect the normal transportation of oil. In this paper, temperature field around the pipelines were analyzed due to different pipe diameters and different insulation layer thicknesses in the way of finite element method. The rule of thawing and freezing of soil around the pipeline in an annual cycle was obtained. Artificial permafrost table variations under the pipeline were also obtained due to different operating conditions. For 30cm diameter pipeline with 7cm insulation layer, its artificial permafrost table depth change value is just 0.48m after 30-year running. These analysis results can provide references to the construction of the new Geermu-Lasa oil pipeline.

• Periodical: Applied Mechanics and Materials (Volumes 501-504)
• Pages: 211-217
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.501-504.211
• Online since: January 2014
• Authors: Wei Bo Liu, Wen Bing Yu, Xin Yi, Lin Chen
• Keywords: Artificial Permafrost Table, Heat Effect, Oil Pipeline, Qinghai-Tibet Plateau, Thawing Rules

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