水利学报2017，Vol.48Issue(5)：545-550,6.DOI:10.13243/j.cnki.slxb.20160381
丁坝局部冲刷坑形态演变及冲刷平衡临界条件
Morphological evolution of spur dike local scour hole and the scour balance critical condition
摘要
Abstract
Roughly several parameters controlled the 3-D characteristics of the scour hole geometry.which were the scour hole depth and width geometry and the side slope of upstream and downstream.The inclinations of the upstream and downstream side-slope kept relatively stable in the stage of scour equilibrium,while the relationship between the wet angle of repose of the sediment particle and the critical condition of scour equilibrium is not clear.A series of clear-water experiments showed that the variation of the scour depth and length possessed asymmetrical characteristic in different flow condition and the angel of inclinations of the upstream and downstream side-slope oscillated damply with time until stability.The scour hole side slope is steeper at upstream than that at downstream,which has a approximate constant of inclination ratio,namely about 0.5.The angel of inclination of side-slope is close to that of repose of the sediment particle,and its lower limit angle ratio approximated to 0.7.关键词
丁坝局部冲刷/冲深与展宽/冲刷坑形态/冲刷平衡临界条件/泥沙颗粒水下休止角Key words
the local scour of spur dike/depth and broadening of scour hole/scour hole shape/critical condition of scour balance/the angle of repose for sediment particles分类
建筑与水利引用本文复制引用
张立,孙忠克,徐东坡..丁坝局部冲刷坑形态演变及冲刷平衡临界条件[J].水利学报,2017,48(5):545-550,6.基金项目
国家自然科学基金重点资助项目(51039004,51579103) （51039004,51579103）
