CLL’s challenge was to lay the foundations in a low headroom confined space underneath an historical building requiring a seismic upgrade.
The design had to be changed because the ground conditions were found to be extremely dense with hard rock underneath the buildings of which they were previously unaware. The design was changed from from 32 micropiles of 150mm diameter to 12 conventional piles of 400mm diameter.
CLL assisted in the redesign to make it faster and easier for the client.
CLL prides itself on its problem solving abilities, creating service and solutions for the industry.
This was an extremely difficult job working in Queen St with restrictions on hours, parking and traffic management. The CLL team was working in a confined space with contamination, fumes and water. They worked through those problems with teamwork, patience, communication and good management skills. Morale needed to be managed because it was dark, cold, wet.
A low headroom piling rig, capable of drilling up to 600mm diameter piles to 15m deep in 2.7m headroom, was used. This is a unique piece of equipment which CLL owns specifically for this type of low headroom work.