Research on torsional dynamic impedance of end-bearing pile in layered soils;

Application of super short end-bearing pile on the soft foundation in old pit;

In order to proof bearing capacity of single pile and find out friction resistance around pile and pile base resistance,the load transfer and resistance analysis test of end-bearing pile are taken by using the load and strain test of drilling hole perfusion end-bearing pile and the cyclic loading method.

5 m thick soil filling can make negative skin friction most be developed,and the bearing capacity of frictional pile as well as end-bearing pile under negative sk.

An academic study on the bearing capacity of end-bearing piles is carried out in the paper.

Determination of single end bearing pile vertical capacity based on nonlinear dynamic theory;

The application of the common software ANSYS in the end bearing pile structure under surface load as well as the calculation principles of the stress and modification of the end bearing pile structure is introduced.

For reducing the investment and cost,this paper described that engineering pile was substituted as uplift pile in the construction of end bearing pile,the also calculates the uplift bearing capacity.

Aimed at solving the low accuracy problem in high strain dynamic pile testing method for toe bearing tubal pile testing, the authors, based on years of actual testing experience, put forward the essentials for testing and the analyzing and interpreting method of the toe bearing pile in the soil, which are of practical guiding significance.