典型侧方堆载作用下埋地管道的应力变化研究  

Stress variation in buried pipelines under typical one-sided loading

作　　者：杨淼 黄文尧 王璐 胡文君 刘凤丹 YANG Miao;HUANG Wenyao;WANG Lu;HU Wenjun;LIU Fengdan(Guangdong Dapeng LNG Co.,Ltd.;Southwest Branch of China Petroleum Engineering&Construction Corp.;College of Pipeline and Civil Engineering,China University of Petroleum(East China))

机构地区：[1]广东大鹏液化天然气有限公司 [2]中国石油工程建设有限公司西南分公司 [3]中国石油大学(华东)储运与建筑工程学院

出　　处：《管道保护》2025年第2期78-83,共6页

摘　　要：埋地天然气管道侧方堆载现象是管道工程常遇到的第三方施工问题,特别是软土区的埋地管道,在一侧堆载、对侧挖沟的两侧不对称堆/卸载情况下,管道易产生较大应力,甚至导致破坏。研究以X65管道为对象,以一侧有水沟的埋地管道为典型场景,建立在侧方堆载作用下的三维有限元模型,分析在一定堆载强度下,不同深度、宽度和长度的水沟对管道应力的影响。结果表明,在此极端情况下,水沟深度对管道应力的影响最显著,长度次之,宽度影响最小,研究结果可为埋地管道在不对称堆/卸载施工的安全评价提供借鉴和参考。One-sided surcharge loading poses a significant challenge for buried natural gas pipelines,especially in the context of third-party construction,and is frequently encountered within the pipeline engineering field.Buried pipelines subjected to asymmetric surcharge loading and unloading—resulting from surcharge loading on one side and the presence of a trench on the opposite side—are susceptible to considerable stress and potential damage,particularly in soft soil areas.Focusing on X65 pipelines,a three-dimensional finite element model was developed to simulate the effects of one-sided surcharge loading in typical scenarios where a trench is present on one side of the buried pipelines.The analysis examined the influence of the trench on pipeline stress under specific surcharge loading conditions,considering variations in trench depth,width,and length.The results indicate that,in this extreme case,trench depth has the most significant influence on pipeline stress,followed by trench length,while trench width exerts the least influence.These findings provide valuable insights and references for the safety evaluation of buried pipelines subjected to asymmetric surcharge loading and unloading due to third-party construction activities.

关 键 词：埋地管道 第三方施工 不对称堆/卸载 Mises应力 

分 类 号：TE832[石油与天然气工程—油气储运工程]