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Indonesian Journal on GeoscienceIndonesian Journal on Geoscience

Northern Thailand is an active tectonic region with a history of low to medium magnitude earthquakes, including the Mw 6.1 Mae Lao Earthquake in 2014 which resulted in liquefaction. This research investigates liquefaction potential using seismic ground response analysis, incorporating standard penetration tests and seismic down-hole tests in Chiang Rai Province. A next-generation attenuation model was used to generate ground motion for nonlinear seismic response analysis. The peak ground acceleration at the ground surface, derived from the analysis, was used to assess liquefaction potential empirically. The results indicate that liquefaction could occur at the investigated locations during the earthquake, confirming observations from the Mae Lao Earthquake. This research aims to inform considerations of earthquake impacts in Northern Thailand.

The study reveals that northern Thailand, particularly Chiang Rai Province with its sandy soil profile, is susceptible to liquefaction during earthquakes.The analysis, based on seismic ground response and empirical methods, indicates liquefaction potential at several investigated sites, particularly those close to the earthquake epicenter.These findings underscore the importance of considering liquefaction hazards in seismic design and mitigation strategies for the region.

Berdasarkan penelitian ini, beberapa saran penelitian lanjutan dapat diajukan untuk memperdalam pemahaman dan meningkatkan ketahanan wilayah utara Thailand terhadap gempa bumi. Pertama, perlu dilakukan studi lebih lanjut mengenai pengaruh variasi lapisan tanah yang kompleks terhadap amplifikasi gempa dan potensi likuifaksi. Hal ini dapat dilakukan dengan menggunakan metode pemodelan yang lebih canggih, seperti analisis elemen hingga (finite element analysis), untuk mensimulasikan interaksi antara berbagai lapisan tanah dan meramalkan respons dinamisnya secara lebih akurat. Kedua, penelitian tentang pengaruh kondisi air tanah terhadap likuifaksi perlu diperluas dengan mempertimbangkan variasi muka air tanah musiman dan dampaknya terhadap tekanan air pori. Pengukuran dan pemantauan muka air tanah secara berkala dapat memberikan data yang lebih komprehensif untuk memvalidasi model-model likuifaksi. Ketiga, penting untuk mengembangkan sistem peringatan dini likuifaksi yang terintegrasi dengan sistem peringatan dini gempa bumi. Sistem ini dapat memanfaatkan data dari sensor-sensor gempa bumi dan sensor-sensor tanah untuk mendeteksi potensi likuifaksi secara real-time dan memberikan peringatan kepada masyarakat sebelum terjadinya gempa bumi.

  1. Liquefaction Potential Analysis Along Coastal Area of Bengkulu Province due to the 2007 Mw 8.6 Bengkulu... journals.itb.ac.id/index.php/jets/article/view/4560Liquefaction Potential Analysis Along Coastal Area of Bengkulu Province due to the 2007 Mw 8 6 Bengkulu journals itb ac index php jets article view 4560
File size4.64 MB
Pages13
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