采空塌陷区埋地输气管道的变形及受力分析
发布时间：2019-02-19 10:20
【摘要】：针对采空塌陷对输气管道的潜在威胁,采用管道-土壤相互作用(PSI)单元,结合三向土弹簧非线性模型,建立采空塌陷区埋地输气管道的有限元计算模型,分析了不同管径、壁厚和内压影响下管道的变形和受力规律,并确定最大变形和最大受力的位置。结果表明:适当增加壁厚和减少内压能有效提高管道的安全性;最大Von-Mises应力和最大竖向应变位置均在内边缘塌陷区且靠近中间塌陷区;最大轴向应力和最大轴向应变位置均位于中间塌陷区两侧。所得结果对埋地输气管道穿越采空区的安全防护具有一定参考价值。
[Abstract]:In view of the potential threat of mining collapse to gas transmission pipeline, the finite element calculation model of buried gas pipeline in cave-in area is established by using pipe-soil interaction (PSI) element and the nonlinear model of three-way soil spring, and different pipe diameters are analyzed. Under the influence of wall thickness and internal pressure, the deformation and force law of pipeline are determined, and the position of maximum deformation and maximum force is determined. The results show that the safety of the pipeline can be improved by increasing the wall thickness and reducing the internal pressure, the maximum Von-Mises stress and the maximum vertical strain are located in the inner edge collapse area and are close to the intermediate collapse area. The maximum axial stress and maximum axial strain are located on both sides of the intermediate collapse area. The results are valuable for safety protection of buried gas pipeline through goaf.
【作者单位】： 西南石油大学石油与天然气工程学院;
【基金】：国家科技支撑计划项目(2011BAK06B01-11) 中国石油西气东输管道公司项目XGSGL01423)
【分类号】：TE973
本文编号：2426414
[Abstract]:In view of the potential threat of mining collapse to gas transmission pipeline, the finite element calculation model of buried gas pipeline in cave-in area is established by using pipe-soil interaction (PSI) element and the nonlinear model of three-way soil spring, and different pipe diameters are analyzed. Under the influence of wall thickness and internal pressure, the deformation and force law of pipeline are determined, and the position of maximum deformation and maximum force is determined. The results show that the safety of the pipeline can be improved by increasing the wall thickness and reducing the internal pressure, the maximum Von-Mises stress and the maximum vertical strain are located in the inner edge collapse area and are close to the intermediate collapse area. The maximum axial stress and maximum axial strain are located on both sides of the intermediate collapse area. The results are valuable for safety protection of buried gas pipeline through goaf.
【作者单位】： 西南石油大学石油与天然气工程学院;
【基金】：国家科技支撑计划项目(2011BAK06B01-11) 中国石油西气东输管道公司项目XGSGL01423)
【分类号】：TE973
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