Engineers Australia

Geotechnical aspects of a drainage culvert

Weiwei Li, Jason Williams, Eric Lo and Matthew Kelly

Abstract

This paper describes the geotechnical aspects of the design and construction of a transverse drainage culvert constructed in Goodna to help alleviate flood backwash. Goodna was one of the worst hit areas in the Queensland floods of January 2011. The culvert involved the construction of three pit structures, pipe jacking between these pits and towards the Brisbane River, and slope stabilisation works at the outlet. The design and construction issues associated with the deep excavations, pipe jacking, pile installation, anchor installation and testing and revetment have been discussed.