Shaft Capacity of Open-Ended Piles in Clay

Paul Doherty, Kenneth Gavin
2011 Journal of Geotechnical and Geoenvironmental Engineering  
This paper describes an experimental investigation designed to assess the impact of pile end condition on the capacity of piles installed in soft clay. A series of field tests are described where instrumented open-ended (OE) and closed-ended (CE) model piles were jacked into soft clay. The radial stresses, pore pressures and load distribution were recorded throughout installation, equalization and load testing. While the total stress and pore pressure developed during installation were related
more » ... ation were related to the degree of soil plugging, the radial effective stress which controls the shaft resistance was shown to be independent of the mode of penetration. The long term shaft capacity of the open ended pile was closely comparable to that developed by closed-ended piles, suggesting a limited influence of end condition on the fully equalized shaft resistance. In contrast to the shaft resistance, the base capacity was highly dependent on the degree of plugging. λ Empirical Fitting Parameter for CEM μ Empirical Fitting Parameter for CEM ρ Area Ratio
doi:10.1061/(asce)gt.1943-5606.0000528 fatcat:e4iepo7rbrcjncj6fu7yirywgu