Investigating of Factors Affecting the Bearing Capacity and Settlement of the Composite Pile Group under Vertical Load

Abstract

The goal of this research is to study the effect of the space between long and short piles beneath combined deep foundation caps on the forces acting on piles and the resulting summit, all done by considering variables such as; short pile length, soil pad stiffness (cushion), short pile stiffness and long pile stiffness, using a modeling and numerical analysis method. Modeling and numerical analysis are performed using the Abacus software, which results indicated that by increasing the space between short and long piles, the compressive axial tension acting on short piles rises and the compressive axial tension acting on long piles almost reduces, and also increasing the space between short and long piles will reduce the resulting summit and by rising the elastic modulus of short piles the summit reduces and increasing the elastic modulus of long and short piles results in reducing the summit.

Keywords

• ِdeep foundation
• composite piles group
• raft settlement
• axial load
• numerical analysis