Reliability Analysis Of Pile Foundation’s Bearing Capcity In Xi’an Area

Currently Xi’an pile foundation design is still used the method of constant value design,which is the safety cofficient value K=2. The method of constant value design considersthe case as long as the safety cofficient in considering the role of the resistance is greaterthan the effect of pile foundation is considered to be safe. Obviously, such considerationsare not comprehensive. Under the resistance and the effect of an action itself as randomvariables, greater role in meeting the resistance effect, the pile will still maintain a certainprobability of failure, so failure is inevitable pile, or will result in waste material.Firstly, to collect some of the Xi’an’s foundation pile static loading test data, Verticalultimate bearing capacity of single pile test was conducted normalized, and throughstatistical analysis of the distribution of statistical parameters and the type of the ratio of testdata to design data. Secondly, according to the statistical parameters of the current loadspecification, by calculating the normalized equivalent Xi’an driven pile and static pressurepile to checking point method, static pressure pile on the existing norms pile reliableindicator of vertical bearing capacity. Finally, based on the above results, equivalent througha known target reliability index normalized to the calculation method of checking point,designed to obtain a partial factor expression by the resistance, load and partial coefficientrepresented, and were optimization of partial coefficient were obtained partial factor inXi’an driven pile and static Pressure Pile method of approximate probabilistic design. Thisis the future reliability of pile foundation analysis and design method to determine theapproximate probability that a certain reference value.