A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
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.
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.
Abrasion prediction at Asahi sediment bypass tunnel based on Ishibashi’s formula
Auel, Christian (author) / Boes, Robert M. (author) / Sumi, Tetsuya (author)
Journal of Applied Water Engineering and Research ; 6 ; 125-138
2018-04-03
14 pages
Article (Journal)
Electronic Resource
English
Abrasion Damage in Sediment Bypass Tunnels
| HENRY – Federal Waterways Engineering and Research Institute (BAW) | 2016
Planning and hydraulic design of bypass tunnel for sluicing sediments past Asahi reservoir
| British Library Conference Proceedings | 1997
| British Library Conference Proceedings | 2018
Flow characteristics, particle motion and invert abrasion in sediment bypass tunnels
| UB Braunschweig | 2014