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 30 cm diameter pipeline with 7 cm insulation layer, its artificial permafrost table depth change value is just 0.48 m after 30-year running. These analysis results can provide references to the construction of the new Geermu-Lasa oil pipeline.


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    Title :

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


    Contributors:
    Liu, Wei-Bo (author) / Yu, Wen-Bing (author) / Yi, Xin (author) / Chen, Lin (author)


    Publication date :

    2014


    Size :

    7 Seiten




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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