oa Civil Engineering = Siviele Ingenieurswese - 4 - Gautrain Project South Africa : Southern Viaduct Section
Foundations and geotechnical aspects : construction and project management



The seven southern section viaducts, with a total length of some 4,3 km, traverse a variety of geological units. Preferential weathering in the upper reaches of the profile necessitated that two main founding solutions be adopted: piles and spread footings. The spread footing founding depth varied from 3 to 7 m while that for the piles approached 30 m in places. Table 1 details the foundation attributes.


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