Author(s): Durjoy Arzu; Takumi Okamoto; Takao Tamura; Yasunori Muto

Linked Author(s): Yasunori Muto

Keywords: Embankment; Dyke; Overtopping; Breaching; Erosion

Abstract: Flooding is a regular phenomenon in different places around the world and will increase its frequency and damage due to the temperature rise induced by climate change and socio-economic development, which increases the exposure of people and property to flooding. For preventing riverine floods, the widely used technique is to construct embankments or dykes. Generally, these embankments have great lengths and require a considerable amount of construction material. Hence, embankments with slopes protected with concrete or other hard materials are only sometimes economically feasible and burden government expenditure. Moreover, past statistics suggest that most failures of embankments occur due to overtopping. This study discusses how embankment strengths change with the changes in the ratio of simple granitic sand and clay particles by overtopping. Ten cases of experiments were performed using varied proportions of granitic sand and clay, and it was found that particle size, water content, and cohesivity influence the strength of embankments. Both soil tests and video analyses were conducted in the research.

DOI: https://doi.org/10.3850/978-90-833476-1-5_iahr40wc-p0772-cd

Year: 2023