ESTD PERPUSTAKAAN UNTAD
ESTD PERPUSTAKAAN UNTAD
| JudulPOTENSI LIKUEFAKSI DI DESA IPI (JEMBATAN IPI 2) KECAMATAN BUNGKU TENGAH KABUPATEN MOROWALI BERDASARKAN DATA HASIL SWEDISH WEIGHT SOUNDING |
| Nama: ADE BHAYU PRATAMA |
| Tahun: 2025 |
| Abstrak POTENSI LIKUEFAKSI DI DESA IPI (JEMBATAN IPI 2) KECAMATAN BUNGKU TENGAH KABUPATEN MOROWALI BERDASARKAN DATA HASIL SWEDISH WEIGHT SOUNDING Ade Bhayu Pratama, Ida Sri Oktaviana, Hendra Setiawan ABSTRAK Indonesia memiliki risiko tinggi terhadap bencana alam karena letaknya berada pada pertemuan tiga lempeng tektonik dunia, sehingga rentan terhadap gempa bumi, tsunami, dan tanah longsor. Salah satu dampak paling berbahaya dari gempa bumi adalah likuefaksi, yaitu fenomena ketika tanah jenuh air kehilangan kekuatan gesernya akibat getaran dan berubah sifat menjadi seperti cairan. Desa Ipi yang berada di Kecamatan Bungku Tengah, Kabupaten Morowali, termasuk kawasan yang rawan likuefaksi karena berdekatan dengan sesar aktif dan memiliki tanah berpasir di dataran rendah pesisir. Penelitian ini bertujuan untuk mengetahui karakteristik tanah serta potensi likuefaksi di Desa Ipi (Jembatan Ipi 2) dengan menggunakan metode Swedish Weight Sounding (SWS). Metode penelitian mencakup pengujian lapangan pada 10 titik, analisis laboratorium berupa uji batas Atterberg dan analisa saringan, serta kajian pustaka. Hasil penelitian menunjukkan bahwa tanah pada lokasi penelitian tergolong dalam klasifikasi SP-SC (pasir bergradasi buruk dengan lempung) dan SW-SC (pasir bergradasi baik dengan lempung) menurut sistem klasifikasi USCS. Nilai rata-rata parameter tanah yang diperoleh yaitu Nsw = 100,60 n/m, qa = 71,07 kN/m², dan qu = 84,61 kN/m². Berdasarkan kriteria Tsuchida, Modified Chinese Criteria, serta Seed dkk. (2003), semua sampel tanah menunjukkan potensi likuefaksi. Analisis faktor keamanan (FS) umumnya bernilai < 1> 1 yang berarti lapisan tanah tersebut tidak berpotensi likuefaksi. Dengan demikian, Desa Ipi secara umum memiliki potensi likuefaksi yang tinggi, dan hasil penelitian ini diharapkan dapat menjadi acuan dalam perencanaan pembangunan serta pengembangan infrastruktur di wilayah Morowali. Kata kunci: Likuefaksi, Gempa, Swedish Weight Sounding, Ipi, Tanah. LIQUEFACTION POTENTIAL IN IPI VILLAGE (IPI BRIDGE 2), BUNGKU TENGAH DISTRICT, MOROWALI REGENCY BASED ON SWEDISH WEIGHT SOUNDING DATA Ade Bhayu Pratama, Ida Sri Oktaviana, Hendra Setiawan ABSTRACT Indonesia has a high risk of natural disasters due to its location at the convergence of three major tectonic plates, making it vulnerable to earthquakes, tsunamis, and landslides. One of the most dangerous impacts of earthquakes is liquefaction, a phenomenon in which water-saturated soil loses its shear strength due to seismic shaking and behaves like a liquid. Ipi Village, located in Bungku Tengah District, Morowali Regency, is considered prone to liquefaction because it is situated near an active fault and consists of sandy soil in lowland coastal areas. This study aims to investigate the soil characteristics and liquefaction potential in Ipi Village (Ipi Bridge 2) using the Swedish Weight Sounding (SWS) method. The research method includes field testing at 10 points, laboratory analysis such as Atterberg limits and sieve analysis, as well as literature review. The results show that the soil in the study area is classified as SP-SC (poorly graded sand with clay) and SW-SC (well-graded sand with clay) according to the USCS classification system. The average soil parameters obtained are Nsw = 100.60 n/m, qa = 71.07 kN/m², and qu = 84.61 kN/m². Based on the criteria of Tsuchida, Modified Chinese Criteria, and Seed et al. (2003), all soil samples indicate liquefaction potential. The safety factor (FS) analysis generally yields values < 1> 1, meaning that soil layers at those depths are not susceptible to liquefaction. Therefore, Ipi Village generally has a high liquefaction potential, and the results of this study are expected to serve as a reference for development planning and infrastructure improvement in Morowali. Keywords: Liquefaction, Earthquake, Swedish Weight Sounding, Ipi, Soil. |