Constructed on the site of the former Hong Kong Hilton Hotel, the Cheung Kong Centre was one of the three tallest buildings in Hong Kong when finished. The basement is also one of the deepest in the territory, at 6 levels below ground. Cementaid’s Everdure Caltite System was chosen and used as the sole waterproofing solution to deliver the permanently DRY, design-life maintenance-free performance that Cheung Kong and their tenants demand. The project used Diaphragm Wall construction for the six-level car-parking basement substructure. Diaphragm walls for substructures typically exhibit high rates of water penetration, especially through the joints between the panels, but also through the relatively porous concrete-plus-Bentonite mix of the panels themselves. Therefore this method of construction normally requires the use of internal false wall-plus-drainage systems to provide waterproofing for the interior areas. The location of the Cheung Kong Centre is in the heart of Hong Kong’s Central Business District, where square-foot rents are extremely high and space is at a premium. False wall-plus-drainage systems require a loss of valuable usable internal space – in this case at least a half square metre per metre run of wall length. To enable the provision of maximum usable internal space and a permanently DRY internal basement area, Cementaid proposed the use of the Everdure Caltite System for internal structural walls anchored directly into the diaphragm walls, with steel ties connecting the internal walls reinforcing to the steel cages of the diaphragm walls – thus eliminating the false wall-plus-drainage system entirely. This solution also provided an accelerated construction schedule, enabling earlier completion and early occupation of the structure.
You can find out more here: http://en.wikipedia.org/wiki/Cheung_Kong_Center test16