Shannon Creek Dam Construction
Works undertaken by RIX at Shannon Creek Dam included rock bolts and shotcreting of the spillway walls.
In order to reduce programme and cost, RIX worked with Leighton and their client the Department of Commerce to gain approval for shotcrete as an alternative to conventional form and pour concrete to the walls in the spillway section of the dam. Upon completion of preconstruction testing approval RIX installed all reinforcement and 300mm thick and finished 3500m² of shotcrete walls up to 11m high.
As staged excavation on the approach roads to the dam and to the spillway floor level (up to 50m deep) proceeded, geotechnical design required that large areas required permanent support. Around 4000 Rock bolts were installed whilst meshed and shotcrete areas totaled around 7000m2.