The final settlement deformation of composite foundation is very important for a building’s designing and safety.And it will be a very great waste of human and other resource if we get the final settlement deformation by long time observation.As for the random and fuzzy characters of settlement transition

it’s practically reasonable to predict composite foundation settlement using settlement datum.This paper proved the possibility of execution and efficiency predicting composite foundation settlement based on fuzzy BP neural networks.To fuzz up the BP neural networks with the premise of preserving the original structure of networks is to directly fuzzy up the sample datum

the result represents the correlative coefficient between sample set and control set

by this

fuzzy BP neural networks study and evaluate the final results.