Liquefaction Analysis of Beach Protection Structure: Numerical Simulations

Abdul Hakam, - Junaidi, Bayu M Adji, Shafira R Hape, M Sofian Asmirza


The damage on infrastructures as well as environmental losses can be triggered by abrasion. That is why abrasion is included one kind of concerning disasters in Indonesia. West Sumatra is one of the provinces in Indonesia where its shoreline faces directly to the Indian Ocean. The West Sumatra shoreline abrasion phenomena have been recorded since earlier year 1900s. Abrasion prevention structures generally can be used to minimize the damage in near shore infrastructures. Cobblestone type groin is the most popular abrasion prevention structures to protect coastlines in the West Sumatra. West Sumatra groins were usually placed directly on the beach sand. The stability of the kind of groins is then greatly influenced by the mechanical state of the soil. Practically, the groins were designed in the static state which considers self-weight and the wave forces. In fact, due to dynamic forces the stability of the groins can be reduced. The external dynamic forces can increase in inertia forces and the change of the soil condition. Earthquake may lead the groins' base soil to liquefy which can disrupt the stability of the groins in terms of loss of bearing capacity. This study described the numerical simulation results to observe groin stability due to liquefaction. The liquefaction phenomena is simulated by increasing the applied pore pressure in the soil mass. The simulation results are then plotted in terms of shear-normal stress diagrams. The groin stability is then observed using the Mohr-Coulomb failure criterion. This study found that groin stability is not only disrupted by full liquefaction, but the liquefaction state can also disrupt the groin stability. It is also found that the groin dimensions affect the stability against a certain liquefaction level.


liquefaction; abrasion protection structure; numerical analysis.

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A. Hakam, B. Istijono, and T. Ophiyandri, Vegetations as Beach Protection: Simulations of Root Protection Mechanism Against Abrasion, IJASEIT Vol. 7, No. 6, pp. 2316–2321, 2017

BNPB, The Regulation of the Head of National Disaster Management Agency No. 07/2012: Guidelines for Data Management and Disaster Information in Indonesia (in Bahasa: Peraturan Kepala Badan Nasional Penanggulangan Bencana Nomor 07 Tahun 2012 Tentang Pedoman Pengelolaan Data dan Informasi Bencana Indonesia), Jakarta 2012

K. Zhang, B.C. Douglas, and S.P. Leatherman, Global Warming and Coastal Erosion, Climatic Change, 64: 41, May 2004

E. Arthur B, F. Vladimir R, L.M. and Teresa B, Socio-Ecological and Livelihood Assessment of Selected Coastal Areas in Sorsogon, Philippines, International Journal on Advanced Science, Engineering and Information Technology, Vol. 5 No. 4, pages:339-343, 2015

Y.W. Soedarto, L.Hanum, and M.S.Lestari, Analysis and Identification of Landuse on the Coastal Environment of South Sumatra using GIS, International Journal on Advanced Science, Engineering and Information Technology, Vol. 7 (2017) No. 3, pages: 785-791, 20 July 2017

D. Yuliadi, Eriyatno, M. Yanuar, J. Purwanto, I W.Nurjaya, Socio-Economical Impact Analysis and Adaptation Strategy for Coastal Flooding (Case Study on North Jakarta Region), International Journal on Advanced Science, Engineering and Information Technology, Vol. 6 (2016) No. 3, pages: 390-393, 20 July 2017

Balai Wilayah Sungai Sumatera (BWSS) V, Project Report: Identification of Critical Coast in West Sumatera Province (in Bahasa: Identifikasi Pantai Kritis di Propinsi Sumatera Barat), Padang, 2009

M.A. Othman, Value of mangroves in coastal protection, Hydrobiologia 285: 277-282, 1994.

R. A.Feagin, J. Figlus, J.C. Zinnert, J. Sigren, M.L. Martínez, R. Silva, R., and G. Carter. Going with the flow or against the grain? The promise of vegetation for protecting beaches, dunes, and barrier islands from erosion, Frontiers in Ecology and the Environment, 13(4), pp. 203-210, 2015

Md N.H. Khan, T. Danjo and S. Kawasaki, Artificial Beachrock Formation Through Sand Solidification Towards The Inhibit Of Coastal Erosion In Bangladesh. Int. J. of GEOMATE, 9(2), pp.1528-1533, Dec. 2015

E.D. Jenifer, D.M. Hubbard, I.F. Rodil, D.L. Revell and S. Schroeter, Ecological effects of coastal armoring on sandy beaches, Marine Ecology 29, Suppl. 1, pp. 160–170, 2008

B. Istijono, A. Hakam, and T. Ophiyandri Investigation Of The Effects Of Plant Variety And Soil Sediment To The Coastal Abrasion In West Sumatra, International Journal of Geomate, Vol.14, Issue 44, pp. 52-57, 2018

Ohgituto, Minangkabau Tempo Doeloe #1 - Padang,, 27 Nov. 2012

A Hakam, Laboratory Liquefaction Test of Sand Based on Grain Size and Relative Density, J. Eng. Technol. Sci., Vol. 48, No. 3, 334-344, 2016



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