Research On The Reliability Of The Vertical Bearing Pile Foundation

Pile foundation is a kind of foundation that is widely used in civil engineering. There are many factors that influence the bearing capacity of the pile foundation, so it is very important to analyze the influence degree on the reliability of the pile foundation of each factor.In this paper , the influence degree on the bearing capacity of the single pile of the parameters in the experiential formula are analyzed by using certain sensitivity method. And also, the uncertain sensitivity analysis of the parameters which influence the bearing capacity of the single pile is done by using the finite element software ANSYS. All of these are for the sake of finding the main factors which influence the bearing capacity of the single pile more. The researches mainly include the following contents:1. The influence degrees on the index of reliability of the single pile capacity of the parameters in the experiential formula are analyzed by using certain sensitivity method. These parameters include each ultimate shaft resistance of the shaft soils, the ultimate tip resistance of the tip soil, the effect of the load and the uncertain factor of the calculate method.2. The simulation on the bearing of the single pile is done by using the finite element software ANSYS. According to the result of comparing to the actual condition, the simulation is well done.3. On the base of the correct simulation, the analysis of the reliability of the single pile is done by using Mote-Carlo method. The analysis includes the following contents: the reliability analysis and the uncertain sensitivity analysis of the capacity of the single pile under a certain displacement on the top of the pile, the uncertain sensitivity analysis of the displacement on the top of the pile under a certain force on the top of the pile, and the uncertain sensitivity analysis of the displacement on the top of the pile under different forces on the top of the pile. And some significative conclusions are obtained.The method that is used in this paper provides a new way for analyzing the reliability of the pile foundations.