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doi:10.3850/9789628014194_0006
Foundation Design for a Tall Tower in a Reclamation Area
Frances Badelow1,a, Sungho-Kim2, Harry G. Poulos1 and Ahmad Abdelrazaq3
1 Coffey Geotechnics Pty Ltd, Sydney, Australia.
afrances_badelow@coffey.com
2 Jinyoung ENC Enterprise, Seoul, Korea, 135-260.
jyenc@chol.com
3 Highrise/Complex Building, Samsung CandT, Korea.
ahmad.abdelrazaq1@samsung.com
ABSTRACT
A 151 storey super high-rise building located in an area of reclaimed land constructed over soft marine
clay in Songdo, Korea is currently under design. This paper describes the design process of the foundation
system of the supertall tower, which is required to support the large building vertical and lateral loads and
to restrain the horizontal displacement due to wind and seismic forces. The behaviour of the foundation
system due to these loads and foundation stiffness influences the design of the building super structure,
displacement of the tower, as well as the raft foundation design. Therefore, the design takes in account the
interactions between soil, foundation and super structure, so as to achieve a safe and efficient building
performance.
The foundation design process described includes the initial stages of geotechnical site characterization
using the results of investigation boreholes and geotechnical parameter selection, and a series of detailed
two- and three-dimensional numerical analysis for the tower foundation comprising 172 bored piles of
varying length using finite element and boundary element methods.
Keywords: Foundation design, Foundation stiffness, Piled raft, Reclaimed land, Super high-rise building.
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