Behavior of Model Piled-Raft Foundation in Cohesive Soil Subjected to Different Inclined and Eccentric Loading Conditions
摘要
The piled-raft foundation represents a distinctive foundation approach that combines the benefits of shallow and deep foundations. It arises as a solution when the load demands more capability from a raft foundation alone, prompting the incorporation of piles to augment its resilience against potential failure. This integration of piles primarily aims to reduce settlements to an acceptable limit. Within a model experimental framework conducted on CI-type cohesive soil, the central objective revolves around scrutinizing the comparative behavior of model piled-raft foundations under varying conditions of inclined and eccentric loading. The study involves a model piled-raft foundation examination encompassing an array of scenarios involving different ratios of eccentricity (e) to width of raft (B) equal to 0, 0.05, 0.10, and 0.15 paired with load inclination angles (ϴ) equal to 0°, 30°, 45°, and 60° with a concentric vertical axis. The research work comprises various comparative graphs like load versus displacement, yield load versus e/B ratio, and moment versus rotation for different load inclination angles. The findings derived from this research offer profound insights and stand as a point of reference, demonstrating a consistent decline in the load carrying capacity of the model piled-raft foundation as the eccentricity and load inclination angle increase. As the load inclination angle increased from 0° to 60° relative to the concentric vertical axis, the Initial Yield Load (IYL) and Final Yield Load (FYL) decreased to almost 30% and 40%, respectively, for e equal to 0.15B and differential settlement increases for the e equal to 0.15B and ϴ equal to 60° as compared to other combinations of eccentricity and load inclination angle.