The Influence of Slopes to the Stability of Stones in front of Seawall

Haryo Dwito Armono, Danny Indra Setyawan, Muhammad Zikra

Abstract


Seawall is a coastal protection structure to prevent coastal erosion from wave forces. In this research, rubble-mound of stones are used as armor due to the availability of the material in coastal areas and ease of construction. A series of physical model tests with a scale of 1:25 with a variation of four wave heights (H), two wave periods (T), and three different slopes of rubble-mound in front of seawall were performed. Parameters used in the research are stability coefficient (KD),wave steepness (H/gT2), and percentage of damages (Do). The slope variations of rubble-mound were 1:1.15, 1:1.5, and 1:2. The experiments also displayed that the stone stability coefficient (KD) directly proportional with wave steepness (H/gT2). The value of KD for the seawall model with the slope angle of cot = 1.15 is 4.4, cot = 1.5 is 4.28 and cot = 2 is 3.02. From all three variations of slope, the most stable is on the slope 1:2 with the least damage impact on the model. The gentlest slope is the most stable structure.

Keywords


seawall; rubble-mound; physical model; stability coefficient

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DOI: http://dx.doi.org/10.12962/j2580-0914.v1i2.7051

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Contact:

Pusat Publikasi Ilmiah LPPM Instutut Teknologi Sepuluh Nopember
Department of Ocean Engineering
Institut Teknologi Sepuluh Nopember (ITS)
Kampus ITS - Sukolilo
Surabaya 60111 - Indonesia
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e-mail: ijoce@its.ac.id
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International Journal of Offshore and Coastal Engineering by Department of Ocean Engineering is licensed under a Creative Commons Attribution 4.0 International.

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Based on a work at https://iptek.its.ac.id/index.php/ijoce/index.

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