Centrifuge modelling of rock bolts with facing plates Available to Purchase

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