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A grout curtain is a barrier that protects the foundation of a dam from seepage and can be made during initial construction or during repair. [1] Additionally, they can be used to strengthen foundations and contain spills.
The Mukurumudzi Dam is a 24m high homogeneous earthfill dam, with a low permeability central core and cut-off key and grout curtain, to limit seepage under the dam. The outlet works comprise a reinforced concrete intake tower and a reinforced concrete draw-off culvert and associated pipe work. [2]
To prevent seepage in the dam's foundation, a grout curtain was injected in the bedrock and a drainage network with 2,400 ft (730 m) of tunnels was constructed just downstream of the dam to collect water that might seep through. [12] After the extensive preparatory works were complete, the first concrete for the dam was poured on October 3, 1962.
The dam's crest reaches an altitude of 2,365 m (7,759 ft). The dam structure contains approximately 6,000,000 m 3 (211,888,000 cu ft) of concrete. [2] To secure the dam to the surrounding foundation, a grout curtain surrounds the dam, reaching a depth of 200 m (656 ft) and extending 100 m (328 ft) on each side of the valley. [4]
The cleared, underlying rock foundation of the dam site was reinforced with grout, forming a grout curtain. Holes were driven into the walls and base of the canyon, as deep as 150 feet (46 m) into the rock, and any cavities encountered were to be filled with grout.
Grand Coulee Dam is a concrete gravity dam on the Columbia River in the U.S ... holes into the granite and filled any fissures with grout, creating a grout curtain. [28]
As excessive water leaked into lower areas of the dam, the water level was drawn down and engineers increased drainage. Dam in 2007, with "thrust block" at base. In 1979, the grout curtain was strengthened and another full impoundment was unsuccessfully attempted. Between 1980 and 1981, a polyurethane resin grout was used to re-grout joints and ...
A compacted impervious cutoff trench to bedrock and a grout curtain in the rock are provided for underseepage control. [1] It was constructed along with Saylorville Dam as a flood control project by the US Army Corps of Engineers, Rock Island District. Major flooding occurred in 1851, 1859, 1903, 1944, 1947, and 1954. [2]