Liquefaction analysis of road embankment in Pidie Jaya due to aceh earthquake in 2016

Abstract

The 6.5 Mw Aceh earthquake has been struck the north-east part of Sumatra Island on 7 December 2016. The strong quake was at a depth of 13 km and categorized as a shallow earthquake. The earthquake has caused many damages to the roads as results of lateral spreading in Pidie Jaya Regency. This study is conducted to analyze the liquefaction phenomena that caused lateral spreading on the Pidie Jaya roads. All of the soil data for the analysis were taken from the field of the affected area. First, the soil data are analyzed to examine whether the soil sediment has the potential to liquefaction under the earthquake. Then the detailed analysis to observe the phenomenon of liquefaction on a particular road embankment is conducted with the use of numerical computer program. This study shows that for particular soil sediment which has liquefaction potential, the structure stability analyses need to consider liquefaction circumstance at a certain level. Finally, a reasonable geo-construction analysis is suggested for preventive measures of liquefaction.