ICCE 2016 Cover Image


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.


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.


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Hur, D. S., Nakamura, T., & Mizutani, N. (2007). Sand suction mechanism in artificial beach composed of rubble mound breakwater and reclaimed sand area. Ocean Engineering, 34(8-9), 1104-1119.

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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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Zonguldak'ta deniz kıyısındaki kaldırım ve yol çöktu. (2015, 6 25). Retrieved from CNN TURK:

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