无压管道破损致土壤颗粒流失变化的数值分析  

作　　者：吕玲君 赵贵章 王继凯 张赫鹏 陈世仲 

机构地区：[1]华北水利水电大学地球科学与工程学院,郑州450046

出　　处：《科技创新与应用》2025年第5期75-78,共4页Technology Innovation and Application

基　　金：国家自然科学基金(41604047,U1704243);浙江省岩石力学与地质灾害重点实验室开放基金(ZJRMG-2020-06)。

摘　　要：管材质量、腐蚀老化等易引起管道破损渗漏,造成土壤颗粒流失,进而产生地下空洞,逐渐导致城市地面塌陷发生危险事故。针对无压管线破损导致的颗粒流失问题,该文利用Hertz-Mindlin with JKR Cohesion接触模型对具有一定含水率的黏重黑土开展数值分析。通过对比不同含水率土体、管道破碎口及管道埋深的颗粒流失和总法向力变化,重点研究初期水土流失带来的土壤松动情况。The quality of pipes,corrosion and aging,etc.can easily cause damage and leakage of pipes,causing the loss of soil particles,which in turn creates underground cavities,and gradually develops,leading to dangerous accidents caused by urban ground collapse.Aiming at the problem of particle loss caused by the damage of non-pressurized pipelines,this paper uses the Hertz-Mindlin with JKR Cohesion contact model to carry out a numerical analysis of viscous and heavy black soil with a certain moisture content.By comparing the particle loss and total normal force changes in soil with different moisture content,pipeline fracture holes and pipeline burial depths,the focus is on studying the soil loosening caused by initial soil erosion.

关 键 词：管道渗漏 数值分析 EDEM 颗粒流失量 总法向力 

分 类 号：TU990.3[建筑科学—市政工程]