KLCC Mixed Development Substructure – Package 2

Construction of 6 levels of basement carpark using Top Down methodology.

More than 1,000,000 m³ of earthwork was excavated for this project.

Works involved the construction of diaphragm wall around the site perimeter, large and deep bored piles (size: 2.2m diameter, 100m deep that is considered as one of the deepest bored pile in Malaysia) and plunge in columns as permanent structural element whereas king posts, ground anchors, diagonal steel beam & horizontal tubular beam strutting as temporary structural supports for top down construction, and complying to stringent requirements as to ensure safe working environment at all time.

The lowest level of the basement was designed as a 4m thick concrete raft foundation. Construction involved continuous pouring of concrete over 36 hours.

The project team carried out three castings with a total 22,000 m³ of concrete poured.

The project also involved relocation of existing underground utilities such as 33 KV & 11 KV cables, chilled water pipes & storm water drainage.