Loots Groundwater International did groundwater modelling for dewatering installation for the Barangaroo project in Sydney, Australia. Requested by Pumpability PTY was to research if the dewatering installation design was sufficient. Different well placements are compared with 3D modelling in a wide range of permeability values. Results are based on transient calculations with MicroFEM software.
The results were presented in a dewatering report to present to the supervisors of the project. The size of the construction are was approximately 250 x 150m and total lowering of groundwater was about 10m.
The modelling was challenging because vacuum wellpoints were used at the pile walls, the practical drawdown limit was modelled. Another challenge was the steep (sandstone) bottom and leaks through fractures simulation.
|Example drawdown after 60 days dewatering with a|