NUMERICAL FITTING OF BEARING MECHANISM OF SUPER-LONG PILE

In practice, it is difficult to measure bearing capacity of super-long pile. When load transfer mechanism of super-long is analyzed with finite element method, it is difficult to choose parameters of soil. To overcome this problem inverse analysis is conduded. The data measured on-site are fitted with numerical calculation. Thus rational soil parameters are determined Incorporating these parameters into finite element method, the end bearing, frictional resistance and deformation of super pile are calculated Direct method is used in the inverse analysis and the equation of object function is solved with composite algorithm. The Duncan Chang model is used in finite element method and the Goodman model is adopted in contact plane. The data that are worked Out in this paper tally with the data measured on-site. Thus, the data that cannot be measured on-site can be obtained, especially the bearing capacity of super-long pile. The results show that inverse analysis is feasible and correct.