9.2.5 Resloping and unloading

Where overburden or weathered rock present in the upper portion of a cut, it is often necessary to cut this material at an angle flatter than the more competent rock below. The design procedure for resloping and unloading starts with back analysis of the unstable slope. At places a slide developed, it may be necessary to unload the crest by reducing the driving force of the cut (Figure 5). This operation is usually carried out by excavators and bulldozers.

    Foundation overstress                reduce load


 Figure 5: Reduce driving weight