Environmental Engineering Reference
In-Depth Information
Figure 17.19.
Backfill concrete of a fault at Warragamba dam (based on Nicol, 1964).
Figure 17.20.
Sturt Dam - plan showing inferred displaced wedge in upper right bank (Courtesy SA
Water).
17.8.3.2.1 Sturt River Dam (South Australia)
This 40 m high multiple curvature arch dam (Figures 17.20 and
17.21
) was built during
1964-1966 as a flood control structure. It is located in a steep rocky gorge, formed by silt-
stone which is very strong when fresh. The rock has well developed cleavage, dipping
around 50 degrees upstream. Bedding is rarely visible. Planning stage core drilling showed
the rock to be variably weathered in the abutments and the design allowed for excavation
of the weathered material to produce a foundation on mainly fresh rock, containing few
joints. The design assumed 6-10 m of excavation in the upper right abutment (Figure
17.21).
Figure 17.18
shows the geotechnical log of this part of the foundation when the
