黏性泥石流残留层减阻机理的蛋清试验  

Egg white experimental study on reduction of resistance of residual layer of debris flow

作　　者：宇岩[1,2,3] 王钧[1,2,3] 乔成[1,2,3] 潘华利[1,2] 

机构地区：[1]中国科学院水利部成都山地灾害与环境研究所,成都610041 [2]中国科学院山地灾害与地表过程重点实验室,成都610041 [3]中国科学院大学,北京100049

出　　处：《中国科学院大学学报（中英文）》2016年第5期651-655,共5页Journal of University of Chinese Academy of Sciences

基　　金：国家自然科学基金面上项目(41372331);科技部国际科技合作专项(2013DFA21720)资助

摘　　要：糙率是泥石流防治工程重要设计参数之一,糙率大小直接影响残留层阻力大小.为研究残留层减阻机理,通过40组蛋清试验模拟黏性残留层,观察玻璃球在其上的运动,探讨黏性残留层减阻作用与糙率的关系.在试验数据的基础上,分析残留层糙率与残留层厚度、密度和斜坡坡度的关系,并得出结论:糙率与残留层厚度、密度成正比关系,与斜坡坡度成反比关系.Roughness is an important design parameter of debris flow control engineering and it directly affects the resistance strength of the residual layer. To study the residual layer drag reduction mechanism, we simulated viscous residual layer by performing 40 groups of egg white tests. The glass ball motion on the viscous residual layer was observed and the relationship between resistance reduction of the viscous residual layer and roughness was studied. On the basis of the experimental data, the relationships of roughness with residual layer thickness, density, and slope gradient were analyzed, and the conclusions are given as follows. Roughness is proportional to the residual layer thickness and density and it is inversely proportional to the slope gradient. These results provide a theoretical basis for the future design of debris flow control project.

关 键 词：糙率 残留层 蛋清 泥石流 

分 类 号：P642.23[天文地球—工程地质学]