Abstract:
Traditionally, the interaction factors including pile-soil-raft and pile-soil-pile in pile-raft system are often ignored to simplify the analysis that leads to unsafe and inadequate designs. In addition, the pile-raft system involves interaction with soil which makes it complex to analyze. The interaction depends on many geometrical and strength factors: including, modulus of elasticity of soil (E), Poisson's ratio (?), spacing/diameter (s/d) ratio, length of piles, geometry of raft etc. To investigate the effect of these parameters in the design of pile raft system, we proposed interaction charts for pile-raft system. A series of 3D finite element analysis were performed and effect of parameters was studied. It has been found that there is a possible interaction between pile, soil, and raft that has effect on the design of pile-raft system. From the developed charts, the results clearly highlighted that the pile-soil-pile interaction decreases with increasing s/d ratio, and soils with high modulus of elasticity are more sensitive to variation of interaction factors between the piles of a pile-raft system. Furthermore, increasing the length of pile enhances the interaction between pile and soil while increase s/d decreases the interaction factor. It is concluded from the parametric study that the designers should consider the effect of interaction factors in the design of the pile-raft system.
Page(s):
14-24
DOI:
DOI not available
Published:
Journal: Journal of Himalayan Earth Sciences, Volume: 55, Issue: 1, Year: 2022