Abstract
The 66-storey UOB PLAZA Building in Singapore will be founded on 12 numbers of deep and large diametered caisson type piles. The construction of these massive shafts in the ground, within close proximity of each other and in a densely built-up business district boasts of several technical accomplishments, namely.
(i) extremely short construction time of 12 months
(ii) stringent thermal crack control of concrete temperatures in each shaft using 270kg/m3 sulphate resisting cement.
Continuous mass pour volumes from toe to cutoff are up to 1800m3.
(iii) extensive full scale friction tests on the outer-shell lining to confirm designed friction values between the bouldery clay and caissons.
