Analisis dan Tinjauan Potensi Likuifaksi pada Lapisan Pasir di Bawah Jembatan Weri-Saharei Kabupaten Fakfak, Papua Barat (Menggunakan Metode Kishida, Whitman, dan Valera & Donovan)

Papua lies at the confluence of two plates of the Pacific Plate and the Indo-Australian Ocean Plate which forms a subduction zone that can cause an earthquake. Lifferentiation is an event of changing the nature of the soil from a solid state into a liquid state, caused by cyclic loading at the time of the earthquake. The research was conducted at Weri-Sahare Bridge, located in the border area between Weri and Saharei Villages, Fakfak Timur Sub-district, Fakfak District, West Papua. This study aims to analyze the potential of liquefaction due to earthquake shocks. This research was conducted by analyzing CPT with liquefaction potential analysis using Kishida, Whitman, and Valera Donovan methods. Large-scale earthquake design uses 5, 6, 7, and 7,6 SR. The calculation result using Kishida method and Whitman method with acceleration Donovan experience liquefaction at depth 3,60-5,20 m; 5.80-7.20 m, and 9.40-9.80 m, while Whitman method with Newmark acceleration does not occur liquefaction and Kawasumi liquefaction occurs with magnitude 7 SR. The Valera Donovan method produces all sand layers on earthquake scale designs ranging from 5.0-7.6 SR with potentially liquefaction