东南大学学报（自然科学版）2025，Vol.55Issue(3)：697-706,10.DOI:10.3969/j.issn.1001-0505.2025.03.009
路面下排水管渗漏引起的病害体演化过程研究
Investigation on evolution of underground diseases induced by drainage pipe leakage under pavement
摘要
Abstract
To explore the evolution process of road collapse disasters caused by pipeline leakage,a combined numerical analysis method is proposed.The computational fluid dynamics(CFD)and the discrete element method(DEM)are adopted to conduct the fluid-solid coupling analysis of soil erosion under the action of seep-age.The finite difference method(FDM)is used to obtain the damage situations of the pavement structure at different erosion stages.The results show that the soil particles adjacent to the defective pipeline segments are successively eroded due to seepage,thereby giving rise to the generation of funnel-shaped erosion voids.The distribution of these voids is dependent on the site of the pipeline ruptures.Based on the outcomes of CFD-DEM fluid-solid coupling calculations,the erosion process is segmented into five stages according to the percentages of remaining particles.The topological morphology of the erosion pits is imported into the FDM software.The calculation results after applying the road surface load show that the bearing capacity of the soil beneath the road surface diminishes gradually during the initial two stages,without causing significant damage to the pavement.From the third stage,due to excessive soil loss,the bearing capacity is greatly reduced,and the pavement cracks expand rapidly.In the fourth and fifth stages,the erosion pit expands to a considerable size.The pavement structural layer fractures and forfeits its bearing capacity,ultimately leading to large-scale collapse.关键词
排水管渗漏/路面塌陷/离散元/流固耦合/有限差分法Key words
drainage pipe leakage/roadway collapse/discrete element/fluid-solid coupling/finite difference method分类
建筑与水利引用本文复制引用
吴丽丽,左清锋,聂千朋,杨家琦,张凯威..路面下排水管渗漏引起的病害体演化过程研究[J].东南大学学报（自然科学版）,2025,55(3):697-706,10.基金项目
国家重点研发计划"揭榜挂帅"资助项目(2021YFC3090301). （2021YFC3090301）
