In this study, subgrade settlement in the high-speed rail line connecting Wuhan and Guangzhou during the construction process was measured, and the process of settlement was modeled as a grey system. A grey prediction model, GM(1, 1), was formulated and used to predict the subgrade settlement during construction. A traditional three-point model was also formulated, and the predictions were compared with those of the GM(1, 1) model for this roadbed section. It was found that the GM(1, 1) grey model fit the observed settlem...
