Experimental Study on Effects of Aggregate Ratio and Soil Moisture Content on Stability of Accumulation Body

The failure of accumulation bodies is one of the common landslide disasters. An accumulation body comprising pebbles,gravels and southern red soil was taken as the research object. By measuring the critical slope of the accumulation body,the effect of the composition proportion and soil moisture content on the stability of the accumulation body was analyzed. The results show that:1)In terms of accumulation slope,there is a most unfavorable deposit material constitution(the critical slope of the accumulation body is the lowest when the proportion of materials with lower deposit slope is 80%);2)The critical slope of the accumulation body first decreases and then increases with the increase of soil content,reaching a minimum value at a soil content of 20%;3)The critical slope of the accumulation body first increases and then decreases with the increase of moisture content,and the negative effect is obvious when the moisture content exceeds 30%;4)There is a positive correlation between the flow yield stress and t