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Methodology for Design of Piled Raft for 5-Story Buildings on Very Soft Clay
Conventional piled foundation is usually designed to provide adequate load carrying capacity for buildigs and to limit the overall settlement and to control differential settlement within tolerable limits. Conventionally, piles are often installed into competent stratum or to `set'. However, this solution generally only addresses the short-term problem associated with soft clay as pile capacity will be significantly reduced due to negative skin friction. This often reduces the cost-effectiveness of such `conventional solution'. In this paper, the design methodology of a `floating' piled raft foundation system for medium rise buildings (5-story) on very soft clay is discussed. The main design objective is to control differential settlement at the onset rather than only limiting the overall settlement. The piled raft foundation of the said medium rise building is designed using skin-friction piles of varying length. The design also considers the interaction between the piled raft and soil in order to produce an optimum design which satisfies both serviceability and ultimate limit states. The design methodology and monitoring results of the successfully implemented piled raft foundation for medium rise building are also presented in the paper.
Methodology for Design of Piled Raft for 5-Story Buildings on Very Soft Clay
Conventional piled foundation is usually designed to provide adequate load carrying capacity for buildigs and to limit the overall settlement and to control differential settlement within tolerable limits. Conventionally, piles are often installed into competent stratum or to `set'. However, this solution generally only addresses the short-term problem associated with soft clay as pile capacity will be significantly reduced due to negative skin friction. This often reduces the cost-effectiveness of such `conventional solution'. In this paper, the design methodology of a `floating' piled raft foundation system for medium rise buildings (5-story) on very soft clay is discussed. The main design objective is to control differential settlement at the onset rather than only limiting the overall settlement. The piled raft foundation of the said medium rise building is designed using skin-friction piles of varying length. The design also considers the interaction between the piled raft and soil in order to produce an optimum design which satisfies both serviceability and ultimate limit states. The design methodology and monitoring results of the successfully implemented piled raft foundation for medium rise building are also presented in the paper.
Methodology for Design of Piled Raft for 5-Story Buildings on Very Soft Clay
Tan, Y. C. (author) / Cheah, S. W. (author) / Taha, M. R. (author)
GeoShanghai International Conference 2006 ; 2006 ; Shanghai, China
Foundation Analysis and Design ; 226-233
2006-05-11
Conference paper
Electronic Resource
English
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