Abstract
In order to improve the stability of breakwater due to overflow and seepage flow under tsunami condition, a series of hydraulic model experiment for the model of Kamaishi Harbor Mouth Breakwaters was conducted in terms of the dimension of block reinforcement such as weight, open ratio and layout pattern. As the result from this study, following conclusions were obtained. 1) This paper proposed a formula to calculate the stable weight of block reinforcement on the breakwater foundation in consideration of the overflow and seepage flow induced by tsunami based on the theoretical force balance among the frictional resistance of block reinforcement, the tractive force of the water flow over the caisson to the block reinforcement and seepage force thorough the breakwater foundation. 2) It is experimentally confirmed that seepage failure of rubble mound on the harbor-side of breakwater firstly occurred and then the damage of breakwater was acceralated after overflow occurred. The proposed formula is effective for evaluating seepage failure and scouring of rubble mound under tsunami condition. 3) The damage of breakwater becomes smallest when the block reinforcements are disposed with the height ratio of 3/4 and the triangulate layout.
| Original language | English |
|---|---|
| Pages | 2301-2304 |
| Number of pages | 4 |
| Publication status | Published - Jan 1 2017 |
| Event | 19th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2017 - Seoul, Korea, Republic of Duration: Sep 17 2017 → Sep 22 2017 |
Other
| Other | 19th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2017 |
|---|---|
| Country | Korea, Republic of |
| City | Seoul |
| Period | 9/17/17 → 9/22/17 |
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All Science Journal Classification (ASJC) codes
- Geotechnical Engineering and Engineering Geology
Cite this
Stability evaluation on the block reinforcement for Tsunami resilient breakwater. / Kasama, Kiyonobu; Zen, Kouki; Hirasawa, Mitsunari.
2017. 2301-2304 Paper presented at 19th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2017, Seoul, Korea, Republic of.Research output: Contribution to conference › Paper
}
TY - CONF
T1 - Stability evaluation on the block reinforcement for Tsunami resilient breakwater
AU - Kasama, Kiyonobu
AU - Zen, Kouki
AU - Hirasawa, Mitsunari
PY - 2017/1/1
Y1 - 2017/1/1
N2 - In order to improve the stability of breakwater due to overflow and seepage flow under tsunami condition, a series of hydraulic model experiment for the model of Kamaishi Harbor Mouth Breakwaters was conducted in terms of the dimension of block reinforcement such as weight, open ratio and layout pattern. As the result from this study, following conclusions were obtained. 1) This paper proposed a formula to calculate the stable weight of block reinforcement on the breakwater foundation in consideration of the overflow and seepage flow induced by tsunami based on the theoretical force balance among the frictional resistance of block reinforcement, the tractive force of the water flow over the caisson to the block reinforcement and seepage force thorough the breakwater foundation. 2) It is experimentally confirmed that seepage failure of rubble mound on the harbor-side of breakwater firstly occurred and then the damage of breakwater was acceralated after overflow occurred. The proposed formula is effective for evaluating seepage failure and scouring of rubble mound under tsunami condition. 3) The damage of breakwater becomes smallest when the block reinforcements are disposed with the height ratio of 3/4 and the triangulate layout.
AB - In order to improve the stability of breakwater due to overflow and seepage flow under tsunami condition, a series of hydraulic model experiment for the model of Kamaishi Harbor Mouth Breakwaters was conducted in terms of the dimension of block reinforcement such as weight, open ratio and layout pattern. As the result from this study, following conclusions were obtained. 1) This paper proposed a formula to calculate the stable weight of block reinforcement on the breakwater foundation in consideration of the overflow and seepage flow induced by tsunami based on the theoretical force balance among the frictional resistance of block reinforcement, the tractive force of the water flow over the caisson to the block reinforcement and seepage force thorough the breakwater foundation. 2) It is experimentally confirmed that seepage failure of rubble mound on the harbor-side of breakwater firstly occurred and then the damage of breakwater was acceralated after overflow occurred. The proposed formula is effective for evaluating seepage failure and scouring of rubble mound under tsunami condition. 3) The damage of breakwater becomes smallest when the block reinforcements are disposed with the height ratio of 3/4 and the triangulate layout.
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M3 - Paper
AN - SCOPUS:85045456942
SP - 2301
EP - 2304
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