Download Title of propsed paper for ASRANet International Colloquium 2002:

Title of propsed paper for ASRANet International
Colloquium 2002:
Stochastic Evaluation Of Open Type Steel Check Dam For
Damming Up Performance
Authors
Satoshi KATSUKI 1, Gakuto FUKAWA 2
Abstract
The debris flow disasters often occurred and many peoples were killed by
the debris flow disaster, because the most part of Japan Islands are covered with
mountainous area and the residential area close to the foot of mountain. In order
to prevent such debris flow disaster, many check dams, which is constructed in
river and prevent the debris from flowing down, have been constructed. On the
other hand, the riverbed trends to sink by constructing the check dam, which
makes trouble in water supply management in the down stream area. To solve
this contradictive problem, the open type check dam structure, which has a
certain amount of open space, is constructing in these days. But the
performance of the open space on the contradictive problem, letting pass the
sediment at ordinary time but no-pass in debris flow, is not certified by any
numerical or theoretical approaches.
This paper presents both an application of the distinct element method for
random simulation 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.
Contact:
1Associate
Professor, Department of Civil and Environmental Engineering,
National Defense Academy, Hashirimizu 1-10-20 Yokosuka Kanagawa Pref.
Japan, 239-8686
2 Research
Associate, Department of Civil and Environmental Engineering,
National Defense Academy, Hashirimizu 1-10-20 Yokosuka Kanagawa Pref.
Japan, 239-8686