The relationship between characteristic vector of pile and pile defect type can be established by using .

In order to establish a low strain method of quantitative analysis of pile defects considering pile-soil interaction,the attenuation rule of velocity wave along pile shaft was studied under different pile-soil interaction damping coefficients.

Reseachs of buckling mechanism and analytic methods of piles;

Quantitative recurrence analysis to determine defects of piles by energy recovery method;

Quantitative analysis of defects to piles in foundation with low strain dynamic test;

Making the wave analyzing of foundation pile detection by using the back wave;

The application of rail pile in the reinforcement of foundation pile;

Uncertainty degree evaluation with dynamic parameters method for bearing capacity of foundation piles;

Reliability of pile foundation under vertical and lateral loads;

Application of pile foundation in Guangxi present condition are introduced,the developmental diretion of pile foundation is also discussed according to Guangx

Complex-modal analysis method is used to solve the linear partial differential equation governing axial vibration of transmission tower pile foundation.