... methods of exploration, such as SPT, CPT, etc. to establishstratification of the subsurface materials, the profile of the top of bedrock and bedrock quality, depth togroundwater, limits of types of ... Number of Exploration Points and Depth of Exploration (Modified after Sabatini, etal., 2002)ApplicationMinimum Number of ExplorationPoints and Location of ExplorationPointsMinimum Depth of ... number of soil layers within zone of stress influence of the footing (DIM)(10.4.6.2.4) (10.6.2.4.2)nh= rate of increase of soil modulus with depth (KSI/ft) (10.4.6.3)Pf= probability of failure...