抄録
In this study, a series of centrifuge model tests was carried out to study the mechanical behavior of the slope reinforced by a soil nailing method using rock bolts with prestressed facing plate. For that purpose, a centrifuge model test system was developed, in which the preloading process of rock bolts with facing plate in a model slope can be simulated by hoisting jacks in a centrifuge and pseudo static seismic force can be also imposed on the slope by an inclining table. The tests were performed with various preloading forces. Lateral displacements and settlements of the facing plates, lateral displacements of the slope surface and facing stresses were measured during both the preloading process and the inclining tests. It was found that the reinforcement of slopes by the rock bolts with facing plate could effectively prevent deformation and failure. The larger the prestress was, the better the reinforcement effect. However, the effect of prestress increment on the slope stability became smaller as the prestress increased, especially after large deformations occurred. The deformation of the slope was deeper and wider for the reinforcement with smaller prestress, and shallower in limited local areas for the reinforcement with larger prestress.
