Environmental Engineering Reference
In-Depth Information
FIGURE 12.8
Backfilling the top 4 m with fresh sand. (From Orica Ltd.)
7. The finished reactive iron barrier was then capped with concrete
and well monuments were installed for each of the groundwater-
monitoring locations (see Figure 12.9).
Further construction details are illustrated in Figures 12.10 and 12.11.
Figure 12.10 shows the irregular shape of the sheet piling. As the critical
dimension in terms of barrier performance was the flow-through thick-
ness, the opposing sheet piles were aligned and separated by a minimum of
1535 mm—slightly more than the design thickness, but dictated by the piles'
configuration and dimensions.
FIGURE 12.9
The completed pilot-scale reactive iron barrier with a protective concrete cap. (From Orica Ltd.)
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