Page 170 - Moving the Earth_ The Workbook of Excavation
P. 170
BASEMENTS
4.10 THE WORK
FIGURE 4.10 One-exit digging.
must do the whole job, the back wall cuts can be continued into slot ramps, which should be at
least a foot or two wider than the blade to avoid getting the machine jammed against boulders or
in slides.
Landslides on Hillsides. Excavating on a hillside needs to be done with care, because of the
potential for a landslide. This could be due to an existing weakness in the soil condition, which
might be detected by a gully with an alluvial fan at the end or a scarp indicating a previous landslide
in the area. Soil creep could be occurring, but the rate of movement is in fractions of an inch per
