Abstract:In allusion to a certain landslide of Xiangfan—Shiyan Expressway,some works have been done to find out its geological genesis,material composition,mechanical properties,structure features and motion characteristics based on which the deformation mechanism is analyzed. In addition,large-size geomechanics modelling test is adopted in order to study the process of development,evolvement,form in long geological history period in laboratory,and the curve of the displacement of the rheological model is compared with the data of laboratory physical model test and the monitoring. It is concluded that the creep-sliding characteristics are well reflected by the rheological mode.