Evaluation of compressive capacity of helical pile resting in cohesionless soil

Abstract

Current research deals with the numerical investigation on the behavior of helical piles resting in cohesionless soil subjected to compressive load. The effect of diameter of pile shaft (DS), diameter of helical plate (Dh), depth of pile (H), Inter-helical spacing ratio (S/Dh) and number of helix (m), and type of sand on the load-displacement behaviour of helical pile was evaluated. The numerically determined compression capacity of the helical pile was compared with the existing theories. Apart from this, artificial neural network technique was employed on the obtained results to develop the model equation. An increase in the compression capacity of single and double helical pile was observed with increase in pile depth, friction angle of sand and diameter of pile shaft. For double helical pile, the optimum inter-helix spacing ratio was found 3.

Keywords

• helical pile
• compression capacity
• failure mechanism
• finite-element analysis