Study On Numerical Simulation Of Pile Shaft Resistance Curves Under Vertical Load

As one of deep foundation, pile foundation is applicable for different load-forms and different conditions of construction engineering , it is widely used in many kinds of projects. The bearing capacity directly affects the function which the pile can display. The shaft resistance is an important part of vertical bearing capacity, and it's also a complex problem which can be influenced by many factors. With the development of the research on the pile bearing capacity, carrying deep research on influencing factors of pile shaft resistance, discussing the method of value selection and calculating method are highly meaningful in practical engineerings.But, be limited by kinds of influencing factors in direct test, the distributing curves of the shaft resistance is not so accurate. The usual methods to calculate pile shaft resistance are static method; in situ-testing; empirical method etc. This paper mainly focuses on deducing the model of pile-soil interaction which affect the shaft resistance, and doing research on simulation of variety of the shaft resistance which is changed by different top-load on pile. The research has great significance on both theory and practice in analyzing the changing regularity of the shaft resistance deeply and reinforcing the cognition of the pile bearing performance.This paper analyze the influencing factors of the pile shaft resistance deeply at first, then present how to deal with these factors to display the function at the most in project. According to the pile type and the soil layer, reasonable model of the pile-soil interaction are established. With this model and related experimental findings, a curve fitting model is calculated, and the variable situation is simulated by using numerical method.For further studies on the changing regularity of the shaft resistance which is changed by the different top-load on pile, the paper analyzes and discusses the regularity of the shaft resistance with the FEM method. These studies give evidence s to improve the performance of pile bearing capacity in design and practical engineering . At last, the fitting curves and the experimental data are compared. Results show that the calculated results are in good agreement with the test data. And the studies supply good reference for the further theoretical analysis and the practical engineering.