黄河下游堤防土体抗冲特性试验研究  

Experiment Study of Soil Scouring on the Lower Yellow River Dike

作　　者：赵寿刚[1,2] 汪自力[1,2] 张俊霞[1] 杨小平[1] 冷元宝[1,2] 

机构地区：[1]黄河水利科学研究院,河南郑州450003 [2]水利部堤防安全及病害防治工程技术研究中心,河南郑州450003

出　　处：《人民黄河》2012年第1期11-13,共3页Yellow River

基　　金：中央级公益性科研院所基本科研业务费专项(HKY-JBYW-2009-20);国家"973"计划项目(2007CB714103)

摘　　要：对不同抗冲条件下黄河下游堤防土体的冲刷特性及影响因素进行了试验研究。结果表明:土体冲刷量的变化受流速、土质的影响较大,密度对冲刷量的变化也有一定影响;随着冲刷时间的延长,土体颗粒级配发生明显的变化,较细的颗粒先被冲走,冲出土体的黏粒含量逐渐降低,平均粒径逐渐增大;流速和密度对黏粒含量和平均粒径的变化影响最为显著,土质次之,试样厚度影响最小。The characteristics and influence factors of the lower Yellow River dike soil scouring were studied under different conditions.The results show that the change of the amount of soil scouring is influenced by the flow rate,soil characteristics and density.With the scouring time,the soil grade changes obviously.The smaller particles are firstly washed away,the soil clay content decreases,and the average particle size increases.The flow velocity and soil density are the most significant factors to the variation of the clay content and the average grain size,the next one is the soil characteristics,and the sample thickness is the lowest influence factor.

关 键 词：试验 抗冲特性 土体 堤防 黄河下游 

分 类 号：TV871[水利工程—水利水电工程] TV882.1