水道港口2017，Vol.38Issue(5)：453-457,483,6.
细颗粒黏性原状土的冲刷特性试验研究
Experimental study on erosion characteristics of cohesive undisturbed fine soil
吴月勇 1范力阳 2陈国平 1张典典 1徐宇航1
作者信息
- 1. 河海大学港口海岸及近海工程学院海岸灾害与防护教育部重点实验室,南京210098
- 2. 中国电建集团中南勘测设计研究院有限公司,长沙410014
- 折叠
摘要
Abstract
Based on physical model test, according to the measured erosion rate and bed shear stress, erosion characteristics of cohesive undisturbed fine soil were analyzed,considering the influence of water pressure and criti-cal incipient condition on the parameters of the source term for scour rate formula.The results show that in different water pressure and incipient condition, the relation between erosion rate and relative residual shear stress of silt and fine sand is changeless.The energy index of silt is at around 0.5, and the energy index of fine sand is at around 1. The scouring coefficient of a general continuous incipient condition is slightly bigger than that with a small amount of incipient motion as a starting state.In addition, the scope of silt scouring coefficient is (0.8~9.8)x10 -2 kg. m2.s-1,and the scope of the fine sand erosion coefficient is (0.2~5.5)x10 -2 kg.m2.s-1, The impact resistance of sand is slightly stronger than that of silt.关键词
黏性原状土/水压力/临界起动状态/冲刷率/能量指数/冲刷系数Key words
cohesive undisturbed soil/water pressure/critical incipient condition/erosion rate/energy in-dex/erosion coefficient分类
建筑与水利引用本文复制引用
吴月勇,范力阳,陈国平,张典典,徐宇航..细颗粒黏性原状土的冲刷特性试验研究[J].水道港口,2017,38(5):453-457,483,6.
