ABSTRACT

This chapter describes rock slopes on civil engineering projects in a variety of geological and climatic conditions, and the slope stabilization measures that were implemented. The cut was in slightly weathered granite containing several sets of steeply dipping joints, as well as sheet jointing that dipped at 35° and formed the natural slopes in the area. In the case of slopes under construction, using a flatter slope is always a prime choice for improving stability. Consequently, the collection of structural data had to be based upon surface mapping, which was reasonable because of the extensive rock exposure in the cut face and natural slopes. Cross-sections of the slope were developed using a reflectorless electronic distance measurement, and surface mapping involving rappelling down the face was used to collect structural geology data. The cross-section of the slope shows the shape and dimensions of the blocks formed by the joint sets.