Nonlinear analysis of pile load-settlement behavior in layered soil
来源期刊:中南大学学报(英文版)2015年第9期
论文作者:Lü Shu-hui WANG Kui-hua ZHANG Peng C. J. LEO
文章页码:3615 - 3623
Key words:pile; load-settlement behavior; fictitious soil-pile; layered soil; soft substratum; sediment
Abstract: A simplified approach is presented to analyze the single pile settlement in multilayered soil. First, a fictitious soil-pile model is employed to consider the effect of layered soil beneath pile toe on pile settlement behavior. Two approximation methods are proposed to simplify the nonlinear load transfer function and simulate the nonlinear compression of fictitious soil-pile, respectively. On this basis, an efficient program is developed. The procedures for determining the main parameters of mathematical model are discussed. Comparisons with two well-documented field experimental pile loading tests are conducted to verify the rationality of the present method. Further studies are also made to evaluate the practicability of the proposed approach when a soft substratum exists, and the results suggest that the proposed method can provide a constructive means for assessing the settlement of a single pile for use in engineering design.
Lü Shu-hui(吕述晖)1, 2, WANG Kui-hua(王奎华)1, ZHANG Peng(张鹏)1, C. J. LEO3
(1. Key Laboratory of Soft Soils and Geoenvironmental Engineering of Ministry of Education
(Zhejiang University), Hangzhou 310058, China;
2. CCCC Fourth Harbon Engineering Institute Co., Ltd., Guangzhou 510230, China;
3. School of Computing, Engineering and Mathematics, University of Western Sydney,
Locked Bag 1797, Penrith, Sydney, NSW 2751, Australia)
Abstract:A simplified approach is presented to analyze the single pile settlement in multilayered soil. First, a fictitious soil-pile model is employed to consider the effect of layered soil beneath pile toe on pile settlement behavior. Two approximation methods are proposed to simplify the nonlinear load transfer function and simulate the nonlinear compression of fictitious soil-pile, respectively. On this basis, an efficient program is developed. The procedures for determining the main parameters of mathematical model are discussed. Comparisons with two well-documented field experimental pile loading tests are conducted to verify the rationality of the present method. Further studies are also made to evaluate the practicability of the proposed approach when a soft substratum exists, and the results suggest that the proposed method can provide a constructive means for assessing the settlement of a single pile for use in engineering design.
Key words:pile; load-settlement behavior; fictitious soil-pile; layered soil; soft substratum; sediment