密砂中刚性管-土相互作用的多尺度模拟  

THE MULTISCALE SIMULATIONS OF THE INTERACTION BETWEEN RIGID PIPE AND SOIL IN DENSE SAND

作　　者：张超峰 叶斐 林大干 牛鹏德 刘录刚 陈礼凡 ZHANG Chaofeng;YE Fei;LIN Dagan;NIU Pengde;LIU Lugang;CHEN Lifan(Zhejiang Jiaogong Underground Construction Co.,Ltd.,Hangzhou 311421,China;Zhejiang Communications Construction Group Co.,Ltd.,Hangzhou 310051,China;Research Center of Coastal and Urban Geotechnical Engineering,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江交工地下工程有限公司,杭州311421 [2]浙江交工集团股份有限公司,杭州310051 [3]浙江大学滨海和城市岩土工程研究中心,杭州310058

出　　处：《低温建筑技术》2024年第1期128-131,136,共5页Low Temperature Architecture Technology

摘　　要：实际工程中,埋地管道和周围土体间的相对运动会对其结构完整性和服役性能产生重大不利影响。目前学者对竖直向下运动的管-土作用研究很少。为加深对管道相对土体向下运动时管土相互作用问题的理解,文中基于耦合有限元法和离散元法的多尺度方法,研究了刚性管道相对于砂土发生竖直向下运动时的土体力学响应和破坏模式。分析结果表明,土体承载力和破坏模式受管道埋深影响明显,当管道埋深较浅时,土体表现出整体破坏特征,而当埋深较深时,则出现局部破坏现象。研究结论可为工程中评估穿越地质灾害地区埋地刚性管道的服役性能提供借鉴意义。In practical engineering,the relative motion between buried pipelines and surrounding soil can have a significant adverse impact on their structural integrity and service performance.Currently,there is little research on the vertical downward movement of pipe soil interaction.In order to deepen our understanding of the interaction be⁃tween pipelines and soil during their downward movement relative to the soil,this article uses the multiscale ap⁃proach coupling the finite element method and the discrete element method to study the mechanical response and failure modes of soil when a rigid pipeline undergoes vertical downward movement relative to sand.The results indi⁃cate that the bearing capacity and failure modes of soil are significantly affected by the pipeline burial depth.When the pipeline burial depth is shallow,the soil exhibits a general failure mode,while when the pipe is deeply buried,the local failure mode appears.The research conclusions can provide reference significance for evaluating the ser⁃vice performance of the buried rigid pipelines crossing geological disaster areas in engineering.

关 键 词：刚性管 管-土相互作用 密砂 多尺度模拟 

分 类 号：TU411[建筑科学—岩土工程]