Back Analysis of Displacement of Soil Parameters in Deep Foundation Pit

To solve the difference of calculation results between mechanics parameter analysis and practical situation and attain mechanics parameters fitted for the practical engineering situation,an approach of displacement back-analysis combined with BP neural networks is applied based on the field measured results.When the training of BP neural network is finished,corresponding parameters are attained through the network simulation of actual measured displacement of pile.Thus,the relative arbitrariness is avoided,and the calculation accuracy is promoted.