带帽刚性桩复合地基荷载传递机理研究.pdf

28 8 Vol.28 No.8 2007 8 Rock and Soil Mechanics Aug. 2007 2007) 1,2 1 1 1 2 (1. 330063 2. 210098) TU 47 A Research for load-transfer mechanism of composite foundation of rigid piles with cap LEI Jin-bo1,2 1 1 1 2 , HUANG Ling , LIU Fang-quan , WANG Zhong-hua , YIN Zong-ze (1. College of Civil Engineering and Architecture, Nanchang Hangkong University, Nanchang 330063, China; 2. College of Civil Engineering, Hohai University, Nanjing 210098, China) Abstract: Based on elastic theory and reasonable assumption, the control differential equations have been put forward by adopting the load-transfer function method in order to research the load transfer mechanism of composite foundation of rigid piles with cap, including relations among pile settlement and its axial stress, vertical displacement of soil under pile cap and vertical stress of it, vertical displacement of soil besides pile cap and vertical stress of it, the friction force of pile-side, the soil friction force of the edge of pile cap and load level, depth in rigid pile with cap composite foundation. The corresponding analytical formulas have also been derived by using approximate solution method of differential equation. The calculation results can image basically the mechanical behavior rules of the load transfer for rigid pile with cap composite foundation according to the method proposed, using directly the relation of load-settlement of pile tests as known condition. Key words: rigid pile with cap; load-transfer mechanism