Case Reviews of the Cone Penetration Tests as a Geotechnical Decision Support Tool in the Niger Delta

Abstract: This paper highlights the extended applications of the Cone Penetrometer Test (CPT) for geotechnical decision support in the determination of depth of foundation embedment, optimum depth of excavation, vertical settlement distribution, determination of total consolidation settlement and the assessment of deep shear failure risk with the use of case studies in the Niger delta. These applications are more critical in site conditions where retrieval of soil sample is difficult due to extremely weak or where soil layers are very thin such that are missed during regular boring programmes. In these instances, the (CPT) serves as a vital geotechnical analysis for better and informed decisions, offering economical, high-resolution, nearly continuous data for accurate identification of soil layers and boundaries, efficient and reliable data for various applications, including pavement, swamp rig and offshore foundation design. The CPT data can often be integrated with data from other sources, processed through various analytical and modelling techniques to unravel findings that facilitate strategic and operational choices. Its advantages of rapid data acquisition, cost-effectiveness, and the ability to characterize soil conditions over large areas, which aids in foundation design and risk assessments, provide the enablement for geotechnical analysis and decision support.