泥沙研究2025，Vol.50Issue(3)：58-65,8.DOI:10.16239/j.cnki.0468-155x.2025.03.009
单向及往复流作用下管道沟槽回填试验研究
Experimental study on backfilling of pipeline trenches under unidirectional and reciprocating flow
摘要
Abstract
Based on the experiment of vertical jet scouring non-cohesive sandy beds,backfilling tests under unidirectional and reciprocating flow on the formed stable slope pipeline trench has been conducted.After a series of multi-scale physical modelling,the sediment transport mechanisms,trench cross-sectional morphology,and overall backfilling time variations are revealed.The results show that under unidirectional flow,sediment is pushed forward on the upstream side and partially eroded on the downstream side.The backfilling rate initially increases and then decreases,with a significant slope observed in the trench cross-section.Under reciprocating flow,sediment on both sides of the trench moves reciprocally toward the central axis,with the backfilling rate initially decreasing and then increasing,which resulting in a more uniform and level cross-section.A dimensionless backfilling intensity is introduced to express the variation of total backfilling time,which decreases linearly with its increase under unidirectional flow,and nonlinearly(exponentially)under reciprocating flow.关键词
单向及往复流/泥沙淤积/回填速率/回填强度/回填时间Key words
unidirectional and reciprocating flow/sedimentation/backfilling rate/backfilling intensity/total backfilling time分类
交通工程引用本文复制引用
陈凌峰,闵乐乐,孙玉天,降瑞娇,赵林..单向及往复流作用下管道沟槽回填试验研究[J].泥沙研究,2025,50(3):58-65,8.基金项目
上海勘测设计研究院有限公司项目资助(合同编号:2022QT(83)-069) （合同编号:2022QT(83）
