Study Of Large-diameter Deep Piles Performance

The research of pile bearing capacity is always a focal issue of research and engineering personnel, combined several highway bridge pile foundation in-suit test results, the bearing capacity of long pile is systematically studied.In-suit test has been carried out on bored cast-in-situ large diameter long pile of Yellow River, and the test result has been systematically analyzed. Based on test result, " α " method for single pile bearing capacity prejudication has been improved by exterior strength stabilization criterion, and " α " method for single pile side resistance calculation is widen. Utmost side resistance of long pile in clay has been prejudged by SPT method, and prejudication formula used for pile calculation has been put forwarded. Non-linear neural net BP model which prejudge pile bearing capacity has been introducedAdopting t-y curve tri-beeline model, a composition method which framed structure finite element method and load transfer method combined to form has been brought forward to analyze pile settlement, this theory has established a foundation of controlling pile bearing capacity by settlement, and has enormously applied value.