Analytical calculation method for displacement of under-reamed tension piles

作者：Sun, Xiaoli^*; Mo, Haihong

来源：Chinese Journal of Rock Mechanics and Engineering, 2009, 28(SUPPL. 1): 3008-3014.

• Analytical calculation
• Displacement
• Elastic displacements
• Elastic plastic solutions
• Elastic-Plastic
• Model experiments
• Nonlinear deformations
• Under reamed pile

The belled-out section of under-reamed piles is supposed as spring, and the non-dimension solutions of elastic displacement are deduced according to the equilibrium differential equation of under-reamed piles. The ideal elastic-plastic load-transfer functions for pile shaft are adopted to study the nonlinear deformation of the under-reamed tension piles. The lateral soil strength is regarded as power function, which varies with the depth. On this basis, a series of the closed-form elastic-plastic solutions of displacement and axial load at a certain depth from the ground surface of under-reamed tension pile are deduced. Comparing with the actual responses of the model experiment and in-situ pile test, this proposed method can give reasonable results. The theory solutions not only avoids complex calculation but also predicts the displacement of under-reamed tension piles reasonablely. It can be applied to the actual projects.

• 出版日期2009-5
• 单位华南理工大学