Abstract:
The Tower of Lot L, L1 & M at Kuala Lumpur’s City Centre when completed will stand 700m tall. This
mega tall Skyscraper would merely be less than 500m away from the famous Petronas Twin Tower. From
June 2018 to February 2020 BAUER (MALAYSIA) SDN. BHD. constructed 225 bored piles with
diameters of 2.0m and 2.5m for this tower and podium arrangements. To comply with the depth requirement
of the initial design and the need to have the pile toe ending 2.0m above competent bedrock, the drilling
equipment needed to be able to achieve a maximum drilling depth of 150m by the client. Finally, the deepest
piles constructed on site were as deep as 125m. These dimensions caused superlative challenges which
included but were not limited to, controlling the open borehole stability over time with polymer slurry,
installing up to 70tons heavy steel cages and pouring up to 550m³ concrete continuously in conjunction with
installation of 88t kingposts into workable fresh concrete. The piling works were executed with a BAUER
BG 48 and the newly developed BAUER BG 72, the biggest rotary drilling rig globally available.