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    Stress–Strain Assessments for Buried Oil Pipelines Under Freeze-Thaw Cyclic Conditions

    Source: Journal of Pressure Vessel Technology:;2021:;volume( 143 ):;issue: 004::page 041803-1
    Author:
    Teng, Zhen-Chao
    ,
    Liu, Xiao-Yan
    ,
    Liu, Yu
    ,
    Zhao, Yu-Xiang
    ,
    Liu, Kai-Qi
    ,
    Teng, Yun-Chao
    DOI: 10.1115/1.4049712
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: In this study, outdoor freeze-thaw cyclic tests on the Q345 steel pipeline portion were conducted to analyze the buried oil pipeline stress evolution in a seasonally frozen soil area, namely, the Mohe–Daqing portion of China–Russia crude oil pipeline. The results obtained show that under the freeze-thaw cycle, the variation trend of soil temperature around the pipeline exhibited a hysteresis pattern, which was similar to that of atmospheric temperatures. The soil frost heaving force was shown to drop with depth, and its value at the pipe top was higher than that at the pipe bottom. With the number of freeze-thaw cycles, the frost heaving force of the soil first increased and finally stabilized, while the principal stress of the pipeline increased gradually, and its extreme value tended to be stable after 7–8 cycles, which was consistent with the “ratchet effect” theory. The above findings made it possible to elaborate on a more efficient freeze-thaw cyclic test setup for clarifying the mechanism of frozen soil/pipeline interactions.
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      Stress–Strain Assessments for Buried Oil Pipelines Under Freeze-Thaw Cyclic Conditions

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    contributor authorTeng, Zhen-Chao
    contributor authorLiu, Xiao-Yan
    contributor authorLiu, Yu
    contributor authorZhao, Yu-Xiang
    contributor authorLiu, Kai-Qi
    contributor authorTeng, Yun-Chao
    date accessioned2022-02-05T21:58:55Z
    date available2022-02-05T21:58:55Z
    date copyright2/15/2021 12:00:00 AM
    date issued2021
    identifier issn0094-9930
    identifier otherpvt_143_04_041803.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4276683
    description abstractIn this study, outdoor freeze-thaw cyclic tests on the Q345 steel pipeline portion were conducted to analyze the buried oil pipeline stress evolution in a seasonally frozen soil area, namely, the Mohe–Daqing portion of China–Russia crude oil pipeline. The results obtained show that under the freeze-thaw cycle, the variation trend of soil temperature around the pipeline exhibited a hysteresis pattern, which was similar to that of atmospheric temperatures. The soil frost heaving force was shown to drop with depth, and its value at the pipe top was higher than that at the pipe bottom. With the number of freeze-thaw cycles, the frost heaving force of the soil first increased and finally stabilized, while the principal stress of the pipeline increased gradually, and its extreme value tended to be stable after 7–8 cycles, which was consistent with the “ratchet effect” theory. The above findings made it possible to elaborate on a more efficient freeze-thaw cyclic test setup for clarifying the mechanism of frozen soil/pipeline interactions.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleStress–Strain Assessments for Buried Oil Pipelines Under Freeze-Thaw Cyclic Conditions
    typeJournal Paper
    journal volume143
    journal issue4
    journal titleJournal of Pressure Vessel Technology
    identifier doi10.1115/1.4049712
    journal fristpage041803-1
    journal lastpage041803-10
    page10
    treeJournal of Pressure Vessel Technology:;2021:;volume( 143 ):;issue: 004
    contenttypeFulltext
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