河川敷内の植生および流木が河川構造物(橋梁)に与える影響について

概要

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Potential effects of riverside vegetation and driftwoods on structures in a river such as bridges and bank linings during a flood were investigated through laboratory experiments and field observation study in the Fuji River basin. A model of a river with piers of 1/50 scale was examined in our laboratory using chopsticks as model driftwoods. Experiments of closing phenomena between piers by driftwoods were conducted under various flow and driftwood conditions. It was found that closure between piers was related to water velocity, pier span and size distribution and drifting rate of woods. The origins of driftwoods and their potential effects were investigated in various sections and tributaries of the Fuji River. It was concluded that most of driftwoods were produced by landslides in upper streams.
山梨大学の論文