关键词: 糙率, 残留层, 蛋清, 泥石流

Abstract:

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.

Key words: roughness, residual layer, egg white, debris flow