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Volume Title: ICASGE2023

DOI: ICASGE-GEO

¹khaled E Ebeid ; ²Ahmed M. Nasr; ²Waseim R Azzam; Khaled E Eebeid; Ahmed M. Nasr; Waseim Ragab Azzam

¹Bachelor of Civil Engineering, Delta Higher Institute of Engineering and Technology, Mansoura

²Professor of Geotechnical Engineering,Faculty of Engineering,Tanta University

For bored piles, a careful cleaning must be used to reduce the amount of material trapped in the drilled hole; otherwise, the debris' presence might cause the soft toe effect, which would affect the axial resistance. There aren't many comprehensive researches on bored piles with debris. In order to investigate the behavior of a single pile, a pile composite foundation, a two-piles group, a three-piles group and a four-piles group investigation conducts sixteen numerical tests in which the debris is simulated using foam rubber.1m pile diameter and 10m length with spacing 3D and depth of foundation 1m used, the effect of number of defective number / total number of piles on irregular displacement also studied in this study. It is found that the existence of debris causes reduction of bearing capacity of by 75.6% and 31.2% for single pile and pile composite foundation respectively, 13.2% and 26.7% for the number of defective pile / total number of pile =1/2 and 1 respectively for two group pile, 8.9%, 18.4 % and 27.5% for the number of defective pile / total number of piles =1/3,2/3 and 1 respectively for three group pile and. This reduction increase with increase of number of defective piles / total number of piles and 4.8%, 11.8%,12.9% and 24.7% for the number of defective pile / total number of piles =1/4,2/4,3/4 and 1 respectively for four group pile and decreases with increase of number of pile duo to interaction effect.

debris; Foundation; defective; interaction and board pile

Geotechnical Engineering (GEO)