Settlement of pile foundation considering influence of neighboring foundation

Abstract

Using conventional block foundation method and simulating with Plaxis 3D software, the paper discusses settlement of pile foundations considering influence of neighboring foundation. For friction piles with length greater than 30 m in sandy ground, the calculation results using conventional block foundation method show that settlement of pile foundation can increase up to 44.7% when influenced by surrounding pile foundation, while the simulation results show an increase in settlement of up to 150%. Having an equal number of piles arranged within a range of 3 times the width of foundation can cause significant additional settlement. The simulation results show that range of additional settlement caused by neighboring pile foundation is mainly concentrated along pile shaft and decreases with depth, unlike conventional block foundation method which considers settlement only within subsoil below pile tip. The analysing results can help supplement methods for predicting pile foundation settlement or determining appropriate pile arrangements in design.

Keywords: Settlement; pile foundation; conventional block foundation; Plaxis, soil - foundation interaction.