李锴, 王志方, 项卫东, 王继坤. 天然气分输站分输管道冻胀力学分析[J]. 油气储运, 2011, 30(8): 652-656. DOI: CNKI:13-1093/TE.20110721.1650.001
引用本文: 李锴, 王志方, 项卫东, 王继坤. 天然气分输站分输管道冻胀力学分析[J]. 油气储运, 2011, 30(8): 652-656. DOI: CNKI:13-1093/TE.20110721.1650.001
Li Kai, Wang Zhifang, Xiang Weidong, . Mechanical analysis of frost heaving of pipeline in gas offtake station[J]. Oil & Gas Storage and Transportation, 2011, 30(8): 652-656. DOI: CNKI:13-1093/TE.20110721.1650.001
Citation: Li Kai, Wang Zhifang, Xiang Weidong, . Mechanical analysis of frost heaving of pipeline in gas offtake station[J]. Oil & Gas Storage and Transportation, 2011, 30(8): 652-656. DOI: CNKI:13-1093/TE.20110721.1650.001

天然气分输站分输管道冻胀力学分析

Mechanical analysis of frost heaving of pipeline in gas offtake station

  • 摘要: 负温天然气分输管道周围土壤冻结可能引起冻胀效应,使管道在冻胀荷载作用下发生变形。通过分析土壤冻胀对管道产生的力和位移分布规律,判断管道抬起时最大弯矩、应力的出现点以及管道的安全性。分析了由于土壤冻胀作用而引起的管道上抬力的控制因素,利用管道冻胀上抬力计算模型和管-梁方程建立了管道受土壤冻胀作用的管道内力、位移计算模型。利用Nixon的实验数据对计算模型进行了验证,证明了该模型的合理性。利用该模型对西气东输郑州分输压气站分输用户燃气管道的数据进行分析计算,结果表明:当抬起量为30 mm,即相邻土壤的不均匀冻胀量达到60 mm时,管道处于安全状态。

     

    Abstract: The soil freezing around gas offtake pipeline at negative temperature may cause frost heaving and deformation of pipeline under frost heaving loading. When the pipeline is raised, the maximum bending moment, initial point of stress and pipeline safety can be determined by analyzing the distribution laws of force and displacement of pipeline caused by soil frost heaving. The control factors of lifting force caused by soil frost heaving are analyzed. The calculation models of pipeline internal force and displacement caused by soil frost heaving are esta blished based on the calculation model of pipeline lifting force by frost heaving and pipe-beam equation. The above model's rationality is proved by the Nixon experiment data. The data from Zhengzhou Gas Company, user of Zhengzhou Gas Offtake Station in West-to-East Gas Pipeline, is analyzed and calculated by this model. Results show that the operation of pipeline is in a safe situation when the lifting height of pipeline is at 30 mm, that is, the non-uniform frost heaving capacity around the adjacent soil of pipeline is at 60 mm.

     

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