ACCELERATION MECHANISM OF VOID DEVELOPMENT IN CONCRETE RIPRAP SEAWALLS

Aykut Pamuk; Yumi Okabe; Shinji Sato

doi:10.9753/icce.v35.structures.11

No. 35 (2016), Coastal Structures

No. 35 (2016)

ACCELERATION MECHANISM OF VOID DEVELOPMENT IN CONCRETE RIPRAP SEAWALLS

Coastal Structures

https://doi.org/10.9753/icce.v35.structures.11

Published 2017-06-23

Aykut Pamuk⁺⁻
Yumi Okabe⁺⁻
Shinji Sato⁺⁻

Aykut Pamuk

The University of Tokyo

Yumi Okabe

The University of Tokyo

Shinji Sato

The University of Tokyo

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Keywords

failure of seawalls
sand leakage
pressure propagation
oscillatory flow tunnel

How to Cite

Pamuk, A., Okabe, Y., & Sato, S. (2017). ACCELERATION MECHANISM OF VOID DEVELOPMENT IN CONCRETE RIPRAP SEAWALLS. Coastal Engineering Proceedings, 1(35), structures.11. https://doi.org/10.9753/icce.v35.structures.11

Abstract

Laboratory experiments have been conducted to investigate the acceleration mechanism of the void development in the backfill of a seawall. It is found that the rate of sand leakage is proportional to the air amount in the soil medium. Therefore, the larger void appears to accelerate the further enlargement of the void. Leakage of sand has been found to be closely related to the seepage flow due to the pressure gradient between the soil medium and the water. Therefore, propagation of the wave-induced pressure response influences the leakage of sand. Compressibility and permeability of soil medium have been found to be two significant parameters for the rate of leakage.

https://doi.org/10.9753/icce.v35.structures.11

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References

Bierawski, L. G., Maeno, S., Gotoh, H., & Harada, E. (2002). DEM-FEM model of the outflow of backfilling sand from behind a seawall under wave motion. In Proc., 5th Int. Conf. on Hydro-Science and Engineering.

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Nakamura, T., Hur, D. S., & Mizutani, N. (2008). Mechanism of backfilling sand discharge from a gap under vertical revetment. Journal of waterway, port, coastal, and ocean engineering, 134(3), 178-186.

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ACCELERATION MECHANISM OF VOID DEVELOPMENT IN CONCRETE RIPRAP SEAWALLS

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