ABSTRACT
Rock bolts with individual facing plates is one of the soil nailing methods against relatively shallow sliding failure, which can be applied to natural slopes without cutting trees. In this research, dynamic centrifuge tests were conducted to study the reinforcement mechanism of the rock bolt with individual facing plates and the effects of facing plate width, rock bolt spacing, and rock bolt inclination angle on the seismic stability of the reinforced slope. From the test results, the facing plate resistance working well against the seismic load was confirmed. For weak slopes, plate bearing failure and local surface failure are critical failure mechanisms for the reinforced slopes, which cause reduction of plate resistance and leads to large deformation and slip failure of the slope. Downward inclined installation of the rock bolt from the normal to the slope surface can effectively prevent the movement and secure the slope stability with less mobilised resistance.
