ESTIMATION OF BEARING CAPACITY OF FLOATING RAFT-PILE

Hakam, Abdul (2014) ESTIMATION OF BEARING CAPACITY OF FLOATING RAFT-PILE. TEKNIKA UNAND, 1 (28). ISSN 0854-8471

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Abstract

In this paper, the total bearing capacity estimation of floating raft-pile system subjected to axial loading is presented. The proposed analysis is based on the conventional formulas and the foundation prototypes tested in laboratory. The given axial load and vertical displacement of the models are recorded. The net ultimate capacity for every single pile is predicted from loaddisplacement curves resulting from the tests. The axial load tests of individual raft foundations are also carried out. The group of the piles are then pushed to obtain the load-displacement curve of the foundation. Finally, the raft pile foundation is tested in the same way. In this paper, analytical formulas to estimate the axial pile capacity and the group piles efficiency for piles in clay is reviewed. The calculation using the formulas is compared to the laboratory tests. The axial capacity of the raft-piles foundations floating in clays can be concluded higher than the combination of the piles and the raft capacities. For practical application, the combination formula to estimate the total floating foundation load capacity in soft clay is proposed. Keywords: Raft-pile system, floating foundation, bearing capacity

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