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[1]李玉坤　董壮　常景龙　裴晨亮　周鹏　杨澳　李洪涛　李旺.重型车辆碾压下埋地X70管道力学响应研究[J].油气储运,2024,43(04):1-16.
　LI Yukun,DONG Zhuang,CHANG Jinglong,et al.Study on mechanical response of buried X70 pipeline under heavy vehicle rolling[J].Oil & Gas Storage and Transportation,2024,43(04):1-16.

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重型车辆碾压下埋地X70管道力学响应研究

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 43 期数: 2024年04期页码: 1-16 栏目: 出版日期: 2024-04-25

Title:: Study on mechanical response of buried X70 pipeline under heavy vehicle rolling

作者:: 李玉坤　董壮　常景龙　裴晨亮　周鹏　杨澳　李洪涛　李旺

Author(s):: LI Yukun; DONG Zhuang; CHANG Jinglong; PEI Chenliang; ZHOU Peng; YANG Ao; LI Hongtao; LI Wang

关键词:: 车辆碾压; 埋地管道; 室外试验; 有限元仿真; 力学响应

Keywords:: vehicle rolling; buried pipeline; outdoor test; finite element simulation; mechanical response

分类号:: TE88

文献标志码:: A

摘要:: 【目的】随着中国城镇化建设的不断推进，重型车辆通过埋地管道上方的情况日益增多，严重威胁管道的安全运行。探究重型车辆碾压下埋地管道力学响应规律对保障油气管道安全运行具有重要意义。【方法】以埋地X70管道为研究对象，设计并开展车辆碾压管道室外试验，采用应变电测法获取管道响应数据，总结管道土压力和轴向应力的响应规律；使用ABAQUS软件建立土体-管道有限元仿真模型，采用非线性接触模型模拟管土相互作用，将车辆荷载简化为移动面源恒载，编写DLOAD子程序实现加载，按照试验工况进行仿真。【结果】结果显示管道附加轴向应力的仿真值与试验值偏差小，且土压力、轴向应力分布规律与试验相同，验证管道土压力和轴向应力的响应规律；基于验证后的有限元模型，采用单一变量法，通过仿真探讨了车辆载重、车辆速度、管道直径、管道壁厚、填土高度和管道内压6种参数对管道轴向应力的影响规律。【结论】两侧履带正下方截面处管顶土压力和轴向应力均大于中心截面处，管底轴向应力小于中心截面处。增大管道直径、管道壁厚或者填土高度均可减少车辆碾压引起的管道附加轴向应力，但改变车辆速度和管道内压的效果不明显。研究所得埋地管道力学响应规律可为重型车辆碾压下管道的安全裕度评估提供参考。

Abstract:: [Objective]With the continuous advancement of urbanization in our country, the situation of heavy vehicles passing above buried pipelines has increasingly increased, which is seriously threatening the safe operation of pipelines. [Methods]This paper takes buried X70 pipeline as the research object, designs and carries out outdoor test of rolling pipeline by vehicle, obtains pipeline response data by electrical strain measurement method, and summarizes the response law of soil pressure and axial stress of pipeline. The finite element simulation model of soil and pipeline was established using ABAQUS software, and the nonlinear contact model was used to simulate the tube-soil interaction. The vehicle load was simplified to the dead load of moving point source. The DLOAD subroutine was written to realize the loading. [Results]By using the single variable method, the influence laws of six parameters on the axial stress of the pipeline are discussed through simulation, including vehicle load, vehicle speed, pipe diameter, pipe wall thickness, filling height and pipe internal pressure. [Conclusions]The mechanical response law of buried pipeline studied in this paper can provide reference for the evaluation of safety margin of pipeline crushed by heavy vehicles.

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更新日期/Last Update: 2024-01-26