作者
RCH Koo, Julian SH Kwan, Charles Wang Wai Ng, Carlos Lam, Clarence Edward Choi, Dongri Song, Wai Keung Pun
发表日期
2017/4
期刊
Landslides
卷号
14
页码范围
617-629
出版商
Springer Berlin Heidelberg
简介
Effective design of mitigation measures against debris flow hazards remains a challenging geotechnical problem. At present, a pseudo-static approach is commonly used for the calculation of impact load acting on a rigid debris-resisting barrier. The impact load is normally calculated based on the maximum velocity observed in the transportation zone under free-field conditions without considering debris-barrier interaction. In reality, the impact load acting on a barrier varies with the change of debris momentum flux but this is seldom considered in barrier design. To provide a scientific basis for assessing debris momentum flux during impact, this paper presents results from a study of debris-barrier interaction using physical flume modelling. This study showed that, following the first stage of impact, the accumulated debris behind a barrier formed a stationary zone and caused the remaining debris to slow down …
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