Empirical equations for predicting pile/soil setup effect

11th International Conference on Geotechnical Engineering in Tropical Regions;1st International Conference on Highway and Transportation Engineering 2019

矿业工程;运输工程

Min Lee, Lee^1 ; Sze Ming, Jasmine Wong^2 ; Sien Ti, Kok^1 ; Teck Leong, Lau^1 ; Tuck Wai, Yeong^1

Faculty of Science and Engineering, University of Nottingham Malaysia, Selangor

43500, Malaysia^1

Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Selangor

43000, Malaysia^2

关键词: Coarse-grained soils;    Dissipation of pore water pressures;    Empirical correlations;    Empirical equations;    Fine grained soil;    Pile slenderness ratio;    Slenderness ratios;    Surrounding soils;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/527/1/012014/pdf
DOI  :  10.1088/1757-899X/527/1/012014

来源: IOP

【 摘 要 】

Pile/soil setup effect is a natural phenomenon where pile load capacity increases over time as the results of dissipation of pore-water pressure and soil aging. The magnitude of pile/soil setup is governed by three main factors, i.e. pile slenderness ratio, elapsed time and type of surrounding soil. In this study, empirical correlations were established based on data compiled from previous case studies. Two forms of empirical equations were proposed to predict the pile/soil setup effect subjected to different slenderness ratios and elapsed times. The proposed equations were subsequently verified by actual field data collected from two sites in Malaysia. Results showed that 80% of the pile capacities increased by 1.150-1.875 times per log time cycle. Piles in fine-grained soils generally exhibited a greater pile/soil setup effect than coarse-grained soils.