LIQUEFACTION POTENTIAL IN CHIANG RAI PROVINCE, NORTHERN THAILAND DUE TO 6.8 MW EARTHQUAKE ON MARCH 24, 2011

摘要

Liquefaction potential in Chiang Rai Provice in Northern Thailand is investigated with data obtained after the 6.8 Mw earthquake on March 24, 2011. Several investigation data were collected and used to perform one dimensional wave propagation analysis by using non-linear finite element method, based on 0.206 g as the maximum acceleration recorded for input motion in Chiang Rai area. Furthermore, input motion was applied at bottom of soil column to observe soil behavior under seismic loading of considered earth-quake.The result shows that liquefaction potentially could occur at shallow depth, which is also followed by settlement due to compressibility of soil due to earthquake shaking. Moreover, the liquefaction duration at shallower depth is longer than deeper depth, which may be caused by the effect of fines content and bot-tom-up pressure of wave propagation energy triggering the pore water pressure concentrated at shallower depth.