SIMULATION OF DEBRIS FLOW ENTRAPMENT EFFECT FOR THE OPEN TYPE STEEL CHECK DAM USING 3-DIMENSIONAL DISTINCT ELEMENT METHOD

Abstract

This paper presents a simulation method of debris flow entrapment behavior of the open type check dam by using the 3-dimensional distinct element method. First, small model experiments are conducted in which various size of gravels flow down and clog in the open space of the framed check dam structure. Second, a cylinder element that put as the frame structures entrapping the large scale granulars is installed in the 3-dimensional distinct element method. Several improvements are also proposed. The simulation results of the proposed method match the experimental results quite well.