This study develops geotechnical zonation maps of soil bearing capacity (Q) in Banjarmasin, Indonesia, an area characterized by soft soils. A total of 333 Cone Penetration Test (CPT) data points and five Pile Driving Analyzer (PDA) test locations were analyzed. Bearing capacity was estimated using the Meyerhof, Schmertmann, LCPC, and Begemann empirical methods. Comparison with PDA results indicated that the Schmertmann method had the closest alignment, making it the basis for further analysis. Using this method, Q-values were predicted at depths of 5, 10, and 25 m. Spatial interpolation using Inverse Distance Weighting (IDW) and Ordinary Kriging was applied to produce continuous bearing capacity maps. Cross-validation showed Kriging performed better at greater depths, while IDW had slightly better accuracy at shallow levels. These findings highlight the influence of soil depth on interpolation performance and confirm that CPT-based mapping, validated by PDA data, is a reliable and cost-effective approach for preliminary foundation planning in soft soil regions.
Hamdani et al. (Mon,) studied this question.