Abstract
This paper presents both an application of the distinct element method of debris flow passing through the open type steel made check dam structure and a stochastic evaluation method for the damming up performance of the structure hit by the debris flow which includes huge rocks or large gravels.
The simulation by the distinct element method shows very well the plugging mechanism observed at the open space of the check dam by the rocks or gravels and its randomness induced by the randomness of gravel size and gravel arrangement contained in the debris flow. The proposed stochastic evaluation method can estimate very well the expected value and/or its variation for the simulation results by the distinct element method.
