CAISSON WALL BREAKAGE OF SLOPING TOP BREAKWATER DUE TO COLLISION OF LARGE WAVE DISSIPATING BLOCKS

Kojiro Suzuki; Kenichiro Shimosako; Ryota Gushi

doi:10.9753/icce.v36.structures.18

No. 36 (2018), Coastal Structures

No. 36 (2018)

CAISSON WALL BREAKAGE OF SLOPING TOP BREAKWATER DUE TO COLLISION OF LARGE WAVE DISSIPATING BLOCKS

Coastal Structures

https://doi.org/10.9753/icce.v36.structures.18

Published 2018-12-30

Kojiro Suzuki
Kenichiro Shimosako
Ryota Gushi

Kojiro Suzuki

Kenichiro Shimosako

Ryota Gushi

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Suzuki, K., Shimosako, K., & Gushi, R. (2018). CAISSON WALL BREAKAGE OF SLOPING TOP BREAKWATER DUE TO COLLISION OF LARGE WAVE DISSIPATING BLOCKS. Coastal Engineering Proceedings, 1(36), structures.18. https://doi.org/10.9753/icce.v36.structures.18

Abstract

A sloping top breakwater covered with wave dissipating blocks (STBWB) has been developed and placed in service under extremely large wave conditions in Japan. The U-breakwater in N-port, designed as an STBWB, and constructed using 50t Dolos (Kd number 20) has been in service since the 1980s. Recently, newly developed 100t wave dissipating blocks (Kd number 10) were used to extend the U-breakwater. The stability of the new U-breakwater blocks was certificated by hydraulic experiment of detailed design. However, breakage of caisson wall, as shown in Figure 1, was caused by the large wave energy of Typhoon 19 in 2014. To clarify the failure mechanics, we conducted a series of hydraulic experiments.

https://doi.org/10.9753/icce.v36.structures.18

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References

Sato, Yamagata, Takahashi, Furukawa and Hosoyamada (1992): Hydraulic Characteristics of Sloping Top Breakwater Covered with Wave Dissipating Blocks, Proc. Japanese Conf. of Coastal Eng., Vol.39, pp.556-560.

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CAISSON WALL BREAKAGE OF SLOPING TOP BREAKWATER DUE TO COLLISION OF LARGE WAVE DISSIPATING BLOCKS

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