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| Titel |
Effects of composition of grains of debris flow on its impact force |
| VerfasserIn |
Jinbo Tang, Kaiheng Hu, Peng Cui |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250142339
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| Publikation (Nr.) |
 EGU/EGU2017-5948.pdf |
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| Zusammenfassung |
| Debris flows compose of solid material with broad size distribution from fine sand to
boulders. Impact force imposed by debris flows is a very important issue for protection
engineering design and strongly influenced by their grain composition. However, this issue
has not been studied in depth and the effects of grain composition not been considered
in the calculation of the impact force. In this present study, the small-scale flume
experiments with five kinds of compositions of grains for debris flow were carried out to
study the effect of the composition of grains of debris flow on its impact force. The
results show that the impact force of debris flow increases with the grain size, the
hydrodynamic pressure of debris flow is calibrated based on the normalization
parameter dmax∕d50, in which dmax is the maximum size and d50 is the median size.
Furthermore, a log-logistic statistic distribution could be used to describe the distribution of
magnitude of impact force of debris flow, where the mean and the variance of the
present distribution increase with grain size. This distribution proposed in the present
study could be used to the reliability analysis of structures impacted by debris flow. |
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