Study on Soil-rock-mixture Mechanics Performance under the Condition of Direct Shear

Soil-rock-mixture has been applied wildly in civil engineering.Based on large direct shear test system,study has been done on soil-rock-mixture mechanics performance under direct shear condition.And the study shows that:with the increase of vertical pressure,the peak shear stress of soil-rock-mixture also increases;with the increase of coarse grain content,the internal friction angle of soil-rock-mixture also increases.For cohesive force,when the coarse grain content is above 33%,the two are in positive correlation;otherwise,the two are in negative correlation.The internal friction angle and cohesive force are decreases as the moisture content increases.