The project process involved the installation of retention and building piles socketed into basalt. The primary objective was to provide a ground retention system that would allow excavation for the building foundations while the building piles would offer support to the foundations.
CLL developed the methodology and employed an IMT Drill rig to drill the building piles and core out the basalt to a depth of 18m. An EK110 drill rig was used to drill the retention piles to a depth of 9m. The team also utilized concrete trucks, tremie gear, a crane, excavators to support the drill rigs, and a decontamination unit due to the contaminated ground. The project faced challenges due to the basalt coring and the contaminated ground. Initially, CLL proposed the use of down the hole hammer to drill into the basalt, but due to fractured basalt underground, the team had to revert to coring out the basalt.