Analisis Potensi Likuifaksi dan Perencanaan Perbaikan Tanah pada Bangunan Pemecah Gelombang di Wilayah Pantai Bali Selatan

Moh. Muntaha, Deris Faisa Ralindra, Nadia Zhafirah Maharani, Amalia Firdaus Mawardi, Sungkono SUngkono, Edy Sumirman, Ibnu Pudji Rahardjo, R Buyung Anugraha Affandhie, Achmad Faiz Hadi Prayitno

Abstract


Liquefaction is the condition of the soil that loses shear strength due to an earthquake, so the capacity of the soil decreases suddenly. Liquefaction occurs in water-saturated sand soils, such as in breakwater of South Bali coast with the magnitude earthquake of 6.8 based on BMKG data in 2011. This condition allows liquefaction to occur under the breakwater. This study aims to identify the potential and thickness of the liquefaction layer based on the N-SPT value at 4 bore hole using 3 methods, namely the Seed-Idriss method, the NCEER method, and the Tokimatsu-Yoshimi method, and design ground improvement with vibro compaction to overcome liquefaction problems. Based on the results of 3 methods analysis, the potential for liquefaction occurred in all bore hole zones with a thickness of 5 to 9 m from the ground surface. The ground improvement design uses vibro compaction with a triangular pattern, spacing 2.1 m. Ground improvement increases the liquefaction FS value, so the potential for liquefaction in all bore hole zones does not occur

Keywords


liquefaction; earthquake; breakwater; vibro compaction

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References


P. Hadiwidjojo, M. M. Samodra, and T. Amin, Peta Geologi Lembar Bali, Nusa Tenggara, Bandung. Pusat Penelitian dan Pengembangan Geologi, 1998.

H. B. Seed and I. M. Idriss, “Ground Motions and Soil Liquefaction during Earthquake. Earthquake Engineering Research Institute Monograph,” 1983.

T. L. Youd and I. M. Idriss, “Liquefaction Resistance of Soils: Summary Report from the 1996 NCEER and 1998 NCEER/NSF Workshops on Evaluation of Liquefaction Resistance of Soils,” J. Geotech. Geoenvironmental Eng., vol. 127, no. 4, 2001.

K. Tokimatsu and Y. Yoshimi, “Empirical Correlation of Soil Liquefaction Based on Spt N-Value and Fines Content.,” Soils Found., vol. 23, no. 4, 1983.

K. Kirsch and F. Kirsch, Ground Improvement by Deep Vibratory Methods. 2017.

E. Soebowo, “Geologi Teknik Sedimen Kuarter Dan Bahaya Amblesan, Likuifaksi Di Serangan – Tuban – Tanjung Benoa, Bali,” J. Ris. Geol. dan Pertamb., vol. 26, no. 1, 2016.

Darwis, Dasar-Dasar Teknik Perbaikan Tanah. 2017.

J. Han, Principle and Practice of Ground Improvement. 2015.




DOI: http://dx.doi.org/10.12962/j2579-891X.v21i4.16440

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