Abstract
To manage and treat huge number of roadside slopes, simple evaluation method of slope stability is required. In this paper, a method for evaluation of discontinuous rock slope is proposed. Main features of this method are as follows; 1)stability of triangular pyramid and wedge shaped blocks can be evaluated; 2)three modes of failure, i.e. rockslide , rockfall and toppling are taken into account; 3)stability analysis is based on limit equilibrium theory; 4)friction angle, cohesion and tensile strength of joints are taken into account; 5)pore-water pressure and seismic force can be applied to the block; 6)conditions of stability of blocks are evaluated with simplified vector formulas.
