Experimental Study on Starting Shear Stress of Cohesive Soil in The Lower Yellow River

Abstract

The erosion-resisting capacity of cohesive soil is relatively strong, and its starting factors are very complex, while the physical and mechanical properties of cohesive soil itself have a greater impact on its starting. Based on the experiment of starting erosion of cohesive soil in the lower reaches of the Yellow River, the starting condition of cohesive soil is studied from the point of view of soil mechanics. The physical phenomena of starting of cohesive soil are expounded, and the relationship between starting of cohesive soil and its physical and mechanical properties is analyzed. The experimental results show that the incipient shear stress of cohesive soil increases with the increase of dry density, and the relationship between them is approximately an increasing power function. The incipient shear stress increases with the decrease of water content, and increases with the increase of shear strength. This study can reflect the characteristics of cohesive soil preferably, and it is laid the foundation to further study on the anti-scouribility of cohesive soil.