Poor ground conditions – especially a high water table – presented serious obstacles to the construction of a concrete raft foundation in this West Auckland site. The design required dozens of penetrations of the concrete slab. How could these be created without compromising integrity?
The design called for driven piles to control ground conditions under load-bearing elements. Conqra created custom-made Apache product to cover each pile head before reinforcement cages were installed. There was also the need to protect no fewer than 167 penetrations designed for plumbing and electrical services.
Working on site with the design and construction team, Conqra supervised Apache installation for all penetrations of the concrete raft floor.
The building’s owners have a structure with a high-performance concrete raft floor, with over 160 penetrations of the slab but no water ingress. Apache caps on the piles prevent wicking while a strong damp proof membrane provides peace of mind. Apache’s unique design makes it quick and easy to install on site, so the project was bought to a successful conclusion.
This pile-driven solution with Apache protection has now been adopted by other design engineers on large commercial projects where poor ground conditions are an issue.