ABSTRACT
The modulus of subgrade reaction, commonly recognised as the stiffness of the foundation, plays an essential role in predicting the behaviour of foundations. This research explores the characterisation and estimation of this coefficient for piled raft foundations. This hybrid foundation system finds frequent application in high-rise structures, especially in challenging soil conditions. Following a validation phase, the research identifies the system’s ultimate bearing capacity and then uses a computational approach to derive the modulus of the subgrade reaction. Utilising advanced numerical tools, this research simulated the interaction between piled raft foundations and the underlying soil to estimate the modulus of subgrade reaction in the form of a 2D contour map, illustrating the coefficient distribution throughout all points of the piled raft components. This research underscores the importance and efficiency of numerical modelling in determining the modulus of subgrade reaction for piled raft foundations. It offers insights to enhance foundation design, ultimately contributing to safer and more economical infrastructural developments.
