Analytical Solution for Stress and Displacement after X-Section Cast-in-Place Pile Installation

الملخص EN

X-section cast-in-place (referred to as XCC) pile, which is one of new pile types developed by Hohai University, is widely used for pile foundation and pile-supported embankment over soft ground in China.

However, little research has been carried out on this new type pile, especially the surrounding soil disturbance under XCC pile installation.

This paper presents an analytical solution for estimating the horizontal stress and displacement of surrounding soil of XCC pile after XCC pile installation.

The reliability and accuracy of the present solution are verified by comparing them with the field test results.

Then, parametric studies, such as outsourcing diameter (a), open arc distance (b), open arc angle (θ), the undrained strength (Su), the limit pile cavity pressure (Plim), and the radius of the plastic zone (Rp), are discussed for the practice engineering design.

The results show that the stress and displacement distributions of surrounding soil calculated by this paper are in agreement with field test results.