Effect of Initial Stress on Rock Slope Failure.

概要

論文の詳細を見る
A series of numerical experiments on the failure process of homogeneous rock slope has been performed using Boundary Element Method and Displacement Discontinuity Method, and then the effect of initial rock stress on the stability of homogeneous rock slope has been discussed.<BR>Firstly, the distribution of tangential stress along the surface of rock slope has been analysed and the condition of fracture initiation has been formulated. The stability factor at the fracture initiation.of rock slope is affected by not only the slope angle and the rock strength but also the initial rock stress. Increasing the ratio of horizontal to vertical stresses at the pre-excavation, the value of the stability factor decreases and the location of fracture changes from the toe of slope to the upper surface.<BR>Secondly, failure process of rock slope has been analyzed on the basis of the Fracture Mechanics. It is made clear that the failure process and the failure mode are also affected significantly by the initial stress state as well as the rock strength, the frictional characteristics of the crack surface and the slope angle. Furthermore, it is pointed out that the critical value of the stability factor is rather independent of the initial stress state.
社団法人資源・素材学会の論文