Its great to see this thing finally rise.
Originally Posted by eMKay
Got my Popular Science yesterday, they had a little blurb about how they are shaving 7 months off the construction time....
Popular Science - December 2009
"Renzo Piano's 72-storie glass tower in London, expected to be the tallest building in Western Europe when it opens in 2012, employs a bold new method that could speed the construction of tomorrow's skyscrapers: Build the tower and dig the basement at the same time. A custom deep-diving rig put the tower's structural columns into the ground before excavation took place, so one construction crew can dig the basement-which otherwise puts everyone else on hold-while another installs elevators, staircases and mechanical fixtures on top of the columns. Engineer Bob Gordon of the Mace Group estimates that the technique will save seven months of construction time."
That is called top-down construction. Its relatively new, but it has been done of plenty of other projects before London Bridge Tower.
Don't be surprised if the excavation work runs behind schedule, it occasionally happens with this practice. The actual time savings is usually less then what is first expected.