Indian Journal of Science and Technology

Abstract

Objectives: To study about the design and the ultimate load capacity of helical piles, this depends on various parameters of helices. Methods/Analysis: This project focuses on analytical study of the response and behaviour of Helical Piles in the medium stiff clay. The parameters to be analysed are: Diameter of helical piles, outer diameter of hollow pile shaft and spacing between the adjacent helical plates. An optimal pile configuration was chosen and is then modelled using Helix Pile software based on the provided soil properties and its results are verified against the analysis results. Further, a case study was also done by comparing the capacities, scheduling and economic feasibility of Helical Piles and conventional concrete piles. Findings: From the analytical study it can be concluded that the increase in diameter of the helical plates has positive effect on the uplift capacity and compression behaviour; on the other hand the increase in the outer diameter of pile shaft has negative impact on the same. The spacing between the helices also increases the uplift capacity and compression behaviour of helical piles. Also Helical Piles are cost effective; require less in number and faster erecting when compared to concrete piles.

Keywords: Helical Piles, Helical Plates, Medium Stiff Clay