Abrasion prediction at Asahi sediment bypass tunnel based on Ishibashi’s formula
- Abrasion in a concrete-lined sediment bypass tunnel is estimated using a Japanese state-of-the-art prediction model and validated by measured invert abrasion data at Asahi Reservoir, Japan. The model is described in detail, certain shortcomings are disclosed, and a revised version is proposed. The model consists of a kinetic energy term accounting for the impact by saltating particles, and a friction work term accounting for the grinding stress. It is found that the latter term yields concrete abrasion values being consistently a multiple compared to its kinetic term contradicting other research. Based on that, and a possible particle impact angle inconsistency, it is proposed to omit the friction work term. It is shown that the calculated abrasion is overestimated by 138% on average compared with that measured, if both terms are accounted for. However, promising results are obtained with only 30% overestimation by neglecting the friction work term.
Author: | C. Auel, R.M. Boes, T. Sumi |
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DOI: | https://doi.org/10.1080/23249676.2016.1265470 |
Parent Title (English): | Journal of Applied Water Engineering and Research |
Document Type: | Article |
Language: | English |
Date of Publication (online): | 2022/08/22 |
Year of first Publication: | 2018 |
Provider of the Publication Server: | FH Münster - University of Applied Sciences |
Release Date: | 2022/09/02 |
First Page: | 125 |
Last Page: | 138 |
Faculties: | Bauingenieurwesen (BAU) |
Publication list: | Auel, Christian |
Licence (German): | Bibliographische Daten |