The Rate of Headcut Migration of Cohesive Soil Homogeneous Embankment

Through the physical model test of the headcut migration rate and the threshold friction Velocity test of cohesive soil, it can be found that the water content has an important influence on the breach process of earth dam. With the same degree of compaction (in this paper, the degree of compaction is close to 100%), the larger the water content is, the lower the headcut migration rate is. After the water content exceeds the optimum moisture content, the speed is very slow. The smaller the degree of compaction is, the faster "the headcut moves. In this paper, the relationship between the "threshold friction velocity" U.(c), and material rate parameters C is established, which can significantly improve predicating accuracy of the headcut migration rate.