Modeling and Analysis Variable Cross Section Pile Driven in Sandy Soil using Finite Element

Russul O Makki,Mohammed K Fakhraldin,M Karkush,M Fattah,D Choudhury

doi:10.1051/e3sconf/202131801005

Abstract

This study focuses on the finite element simulation of piles with different models in sandy soils using the software PLAXIS 3D V20. The parametric study has conducted to investigate the influence of multiple parameters on the axial capacity of steel piles in sandy soil, including the cross-section variables in two cases: open and close-ended piles. The typical circular and square cross-section open and close-ended piles were selected as the reference for comparison with variables cross-section piles. The open-ended tapered pile 3b showed an increase in the maximum load capacity about 210% more than the open-ended circular section, while the close-ended tapered pile 3b showed an increase of about 176% in the axial load capacity more than the solid close-ended circular section. In terms of the effect of pile’s type, all of the close-ended sections outperformed the open-ended sections, with the circular section showing a 146% increase in its close-ended section, while the tapered 3b section showed the lowest difference between the close-ended and the open-ended sections with just 120% increase. These results showed that the tapering pile is much more efficient than any straight-sided pile or even circular pile. The results also showed that a short open-ended pile's capacity is smaller than the corresponding closed-ended pile.

Highlights

The pile foundations are the part of a system used to transmit structural load into the soil at a certain depth below the ground bottom surface level
Piles are long and slender members that transfer the load to deeper soil or high bearing capacity rock, avoiding shallow soil with a low bearing capacity [1]
The main objective of this work is to investigate the effect of different pile cross-sections on axial load capacity by means of: 1. Using the geotechnical package PLAXIS 3D for modeling conventional straight-sided and tapered piles’ sections

Summary

Introduction

The pile foundations are the part of a system used to transmit structural load into the soil at a certain depth below the ground bottom surface level. Piles are long and slender members that transfer the load to deeper soil or high bearing capacity rock, avoiding shallow soil with a low bearing capacity [1]. For sand-driven piles and the effect of piles' volume and shape on the pile’s capacity was studied by Robinsky et al.[3]. They studied various embedment depth to diameter ratios, instrumented tapered and cylindrical model piles were driven into the sand. These experiments showed that as the piles were progressed, the unit load transfer rate through the pile walls shifted continuously

Objectives

Results

Conclusion