Abstract

Nowadays, there are three totally different views when it comes to the problem of the impact of specific weight towards underwater angle of repose of sediment. Due to the abnormal variation of light sands, it is hard to get a reasonable explanation to define the general ideal that underwater angle of repose and grain diameter is directly proportional. Based upon the wedge pile-up model and considering the effect of binding power, we had set a formulation of underwater angle of repose, through forces analysis, which is suit to the sediment of cohesive and non-cohesive. Through computation analysis, we can see that the formulation can explain the different phenomena perfectly and unify those different views. Verification analysis demonstrates that the rule reflected by the formulation and observation data is coincident. It proves that the formulation has its practical value.

Keywords: underwater angle of repose; cohesive sediment; non-cohesive sediment; binding power; coefficient of internal friction