Abstract
Liquefaction is a disaster that can damage building infrastructure. This disaster is all too common in granular sandy soils. This is due to the subsidence and instability of the soil when subjected to shocks such as earthquakes. For this reason, mitigation efforts are needed to reduce the risk of liquefaction. This study will compare the effectiveness and influence of micro-pile, stone column, and densification mitigation methods on granular soils at the Central Java PLTU site in reducing the impact of liquefaction risk on land, which is dominated by silty sand soil types. Each type of method has its own advantages in each type of supporting soil layer and has some differences in results due to differences in the material used even in the same dimensions. The purpose of this study was to assess the most suitable use for soil types in the area of the Coal-Fired Power Station in Central Java. This model was analyzed using OpenSees PL software, considering the shocks obtained from the 2007 Niigata earthquake at PEER NGA-WEST2 by analyzing factors such as displacement and reduction in excess pore pressure.
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