Abstract
In this study, the effects of an erosion resistant (ER) layer underneath the embankment and the seepage state prior to overflow were investigated. In the model experiment, tracing the headcut location using an Radio Frequency Identification (RFID) system without stopping the overflow demonstrated that the existence of an ER layer has a significant effect on the headcut migration rate, with a decrease in depth to the ER layer from 4.5 to 1.5 cm, the migration speed increased considerably by 1.20–1.86 times that of the case without an ER layer. When prolonged immersion prior to overflow was allowed, with the increase in the intensity of seepage, the headcut migration rate also increased, and as time elapsed, the effect of ER layer became subservient, though the degree of dominance of the seepage throughout the overflow period is controlled by the ER layer position. Thus, seepage state during prolonged immersion and ER layer underneath embankment toe needs special design consideration.
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Data Availability
The data that support the findings of this study are available from the corresponding author upon reasonable request.
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Acknowledgements
The lime-improved soil used in this experiment was provided by the Saitama Prefecture Construction Soil Recycling Association. We would like to express our gratitude and thank all who supported us in this research.
Funding
This work was partially supported by JSPS KAKENHI Grant Number 19K04611.
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Conducting experiment, data analysis, writing—original draft preparation: MMB; Supervision, writing—review and editing: JY.
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Billah, M.M., Yagisawa, J. Headcut Migration in Earthen Embankment Induced by Varying Sub-surface and Seepage State under Overflow. Geotech Geol Eng 41, 4659–4676 (2023). https://doi.org/10.1007/s10706-023-02538-x
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DOI: https://doi.org/10.1007/s10706-023-02538-x