Influence of geotechnical properties on landslide dam failure due to internal erosion and piping

Austin Chukwueloka Okeke, Fawu Wang, Yasuhiro Mitani

研究成果: 書籍/レポート タイプへの寄稿

9 被引用数 (Scopus)

抄録

Landslide dams are formed in valley-confined settings where favourable conditions like earthquakes, oversteepened slopes, rainfall and snowmelt affect relativelyweathered bedrocks, leading to downslope movement of mountain materials which, under favourable geomorphic setting, block river valleys creating barrier lakes. Landslide damsmay fail by overtopping or by internal erosion and piping. Presently, stability assessments of landslide dams are done considering the geomorphic characteristics of the blockage mainly, without analyzing the properties of the dam materials. This paper presents results of experiments carried out to study the influence of geotechnical properties of landslide dams to failure by internal erosion and piping. The dam models were made up of mixed and uniform soils of varying grain sizes and other index properties. The results show that characteristic properties of dam materials such as density, soil type, dispersion, degree of compaction, hydraulic conductivity and soil gradation affect the stability of dams and control the time and magnitude of the resulting flood. The present study provides new idea and insight on stability analysis of landslide dams considering sparse research results onmaterial properties of landslide dams, which is relevant in numerical simulation of dams, flood routing and early warning system development.

本文言語英語
ホスト出版物のタイトルLandslide Science for a Safer Geoenvironment
ホスト出版物のサブタイトルVolume 3: Targeted Landslides
出版社Springer International Publishing
ページ623-631
ページ数9
ISBN(電子版)9783319049960
ISBN(印刷版)9783319049953
DOI
出版ステータス出版済み - 1月 1 2014
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 環境科学一般

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