Abstract
The term of liquefaction refers to a liquefied soil phenomenon during an earthquake causing the loss of soil bearing capacity. In general, liquefaction occurs in loose sandy soil with saturated condition triggered by an earthquake with Peak Ground Acceleration greater than 0.25 g. This research aim to analyze the liquefaction potential of runway construction which located on loose sandy soil area. The analysis of liquefaction potential is based on borelog data, grain size distribution, soil physical properties, and earthquake risk map. The liquefaction potential was obtained by calculating the liquefaction probability in one dimension analysis determined as safety factor. Settle 3D is also applied in this research. The results show that the liquefaction potentially occurs in sand soil layer at 0-6 meters depth with safety factor 0.11-1.06 from manual calculation and 0.19-1.1 from Settle 3D. This result represents high probability of liquefaction at runway construction area, so that the liquefaction prevention method is needed.
Highlights
Indonesia is the country with high concern in development of public transportation especially for the airport take off and landing services
The soil data consist of borelogs and the laboratory test such as grain size distribution and soil physical properties
The research area potentially has 0,5 g of Peak Ground Acceleration value which determined by the earthquake risk map of Indonesia
Summary
Indonesia is the country with high concern in development of public transportation especially for the airport take off and landing services. Before starting to build the new one, soil investigation is the first important step which covers field and laboratory test to know about the geological condition of planned runway area. The SPT value of sandy soil from 0-6 m depth were measured within range 2-15 It means that there are some separated zones of loose-medium sand soil layer among the stratigraphic condition. The presence of saturated loose sand soil in spotted zone of the runway construction area make it probably has high liquefaction potential. The research area potentially has 0,5 g of Peak Ground Acceleration value which determined by the earthquake risk map of Indonesia. It means that the area is seismically high and potentially trigger the occurence of liquefaction. The field and laboratory data will be used in the analysis as the input parameters
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