Geoss Good Practice For Installation Of Jacked Foundation Piles In Singapore Link [ Free | Summary ]

Introduction

Before commencing the installation of jacked foundation piles, it is essential to conduct thorough site investigations to determine the subsurface conditions, soil properties, and potential hazards. This includes drilling boreholes, conducting standard penetration tests (SPT), and collecting soil samples to determine the soil's geotechnical properties. The site investigation report should provide essential information on the soil's stratigraphy, groundwater levels, and potential liquefaction risks. Kallang Formation : Soft marine clay, estuarine deposits,

• Kallang Formation: Soft marine clay, estuarine deposits, and fluvial sands.
• Old Alluvium (OA): Dense, granular material with high SPT-N values.
• Jurong Formation: Weathered sedimentary rocks with variable strength.

2. The "Set" Criterion and Termination Logic

Perhaps the most technically rigorous section of the guide deals with the termination criteria. The industry has long debated how to determine when a jacked pile has reached sufficient capacity. The guide moves away from arbitrary depth requirements and establishes a physics-based approach involving the relationship between the applied jack force, the pile penetration rate, and the "set" (the residual displacement). the pile penetration rate