Prediction of ultimate bearing capacity of piles based on Usher model
1. College of Ocean Environment and Engineering, Shanghai Maritime University, Shanghai 201306, China; 2. College of Civil Engineering, Tongji University, Shanghai 200092, China）
Abstract：In order to enhance the understanding of piles bearing behaviors, Usher mathematical model in biological field was selected to fit load-settlement curves （ i. e. Q - s curves ） of piles and the ultimate bearing capacity of piles was predicted. Estabilishment and solution of Usher model were completed, and this model was used to analyze field load testing data of 3 types piles （ including 2 cast-in-place piles and 1 steel pipe pile）. The results show that the fitting precision of Q -s curves is high. The fitting effect of the model is better than that of the hyperbolic model, especially at the end of curves. These corresponding fitting equations can be used to forecast the ultimate bearing capacity of piles.
2009, Vol. 30 
