To develop the rational numerical method for predicting the deformation and failure of the rigid pile foundation on rock slope, a series of nonlinear elasto-plastic FEM analyses were conducted to simulate the field experiment on the bearing capacity and failure deformation of rigid pile foundation on rock slope under the lateral loading.

Further study on calculation of the designed thickness of cushions in composite foundation with rigid piles;

Settlement analysis of composite foundation with rigid piles under flexible ground;

Experimental study to reduce differential settlements of raft of composite foundation with rigid piles;

The working mechanism of rigid-pile composite foundation was discussed and the working performance of rigid-piles and surrounding soil in the loading process was analyzed.

The rigid-pile composite foundation is a foundation composed of higher rigid concrete pile or CFG pile.

Based on undisturbed soil tangent modulus method,a new practical settlement calculation method for rigid-pile composite foundation is proposed.

Method for calculating rational thickness of cushion in rigid pile composite ground

In this paper, the bearing capacity of rigid pile composite ground under vertical loads and the law of variation of pile-soil bearing ratio among pile-soil interaction are calculated and analyzed on the basis of discrete element method of the deformable body model, which describes the bearing mechanism of pile-soil interaction of rigid pile composite ground.

Then the condition for formation of rigid pile composite ground and the design method for different pile spacings of composite pile foundation is discussed.