Analysis of soil bearing capacity to determine foundation design in Ngawi City, Indonesia

Abstract Improving economic value in a region can be achieved through planned infrastructure support. As one of the biggest shopping centers, Ngawi Big Market has revitalization activity. Before beginning the revitalization process, it is crucial to test the ability of soil to withstand the load, which is called the soil bearing capacity. In the process of this research, the analysis was carried out by evaluating geological and geotechnical conditions, and calculations of soil bearing capacity values. Analysis of soil bearing capacity value was using NSPT data which uses the equation from Luciano Decourt along data from laboratory tests. The lithology of the research area consists of siltstone, and the drilling results consist of silt, fine sand and clay. The land area of Ngawi Big Market is 15,000m 2 with the building area of the previous market being 14,500m 2 . The permitted lowest bearing capacity is at point BH-T3, namely 6.7 tons at a depth of 2.0 meters, while the highest is at point BH-T1, namely 380.3 tons at a depth of 20.00 meters. Based on the results of the analysis, Ngawi Big Market’s revitalization project recommended to carry out the geotechnical engineering to strengthen the soil as well as detailed calculations of building loads so that they do not exceed the permitted bearing capacity.