Potential of Liquifaction at Nasanapura Hospital Petobo Village Palu City

Abstract

The liquefaction event that occurred in Petobo Village, Palu City, Central Sulawesi, was caused by the Palu earthquake on September 28th, 2018 with a magnitude of 7.4 and a depth of 10 km. This study aims to determine the characteristics of the soil and also whether the area still has the potential for liquefaction based on the Test Swedish Weight Sounding (SWS), and Cone Penetration Test (CPT). The test is carried out at a location that is the limit of the cessation of liquefaction, which has a variety of soil types. Determination of soil characteristics is carried out by laboratory tests, Sieve Analysis and Atterberg Limits. The results of laboratory testing, the soil types at point A are poorly graded sand and silty sand (SP-SM). As for the results of SWS at point D the soil with an Nsw value of more than 180.00 n/m is at a depth of 3.68 m with a Nsw value of 274.73 n/m. From the results of the CPT calculation it was found that the soil at Point E at a depth of 0.80 m – 6.40 m has potential for liquefaction and soil at a depth of 6.60. m – 8.40 m no liquefaction potential.