Environmental Engineering Reference
In-Depth Information
Figure 15.27.
River diversion stages in CFRD's (Materon and Mori, 2000).
combination of gravel in the upstream section of the embankment and rockfill in the
downstream section has been successfully used. Analysis is required of the potential for
differential settlement between the two zones. When the rockfill contains fines drainage
layers may be required.
Zones 2D and 2E are commonly placed in 0.2 m to 0.5 m layers with Zones 3A and 3B
from 0.8 m to 2.0 m thick (Materon and Mori, 2000). Zone 2D is commonly compacted
using manual vibratory compactors. In some projects 3-4% of cement is added to give
some cohesion. (Note. The authors would not recommend this because it would restrict
