Geoscience Reference
In-Depth Information
Table 17.7
Constructing layers on a slope.
Method
Place and compact material in horizontal layers
Place layers on a 1V :4H slope
Advantage
Fast construction process
For limited width areas
Disadvantage
Edge not properly compacted
Side profile variability
Remedy
Over construct by
Regular check on side profile
0.5 m for light weight rollers
•
1.0 m for heavy rollers
And trim back to final design profile
•
Figure 17.2
Placement and compaction of materials.
17.8 Dams specifications
•
The dam core material should be impermeable - have a significant fines
proportion.
•
The core should also be able to resist internal erosion.
•
Dam cores should have a material with a minimum clay content of 20%, and
preferably 30%.
•
While the presence of some stones reduces erosion potential, a significant quantity
of stones will increase the water flow, which is undesirable.
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