Application of two novel CPTu-based stratification models

Two novel CPTu-based stratification models are applied to the measurements at four Norwegian sites, including a broad range of soil behavior types (SBTs). The two models, called RIGTOSS and SIGTOSS, are developed based on the recently proposed integrated Game Theory-optimization subground stratification (-IGTOSS) model. The RIGTOSS model includes two submodels classifying the SBTs based on either the F_r-Q_t or B_q-Q_t charts by Robertson (1990); and similarly, the SIGTOSS model includes two submodels classifying the SBTs based on either the F_r-Q_t or (Δu₂/σ'v₀) Q_t charts by Schneider et al. (2012). The resulting stratification profiles of the four submodels were compared with the ones provided by experts, derived from extensive field and experimental testing. Similarity was observed and the results are promising. Differences at this stage can be attributed to incompatibility of the classification charts with the Norwegian soils and more specifically soil heterogeneities at the Øysand test site.