Disconnected piled raft in Gothenburg clay - A feasibility study of disconnected piled raft in large depth of clay
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Typ
Examensarbete för masterexamen
Program
Infrastructure and environmental engineering (MPIEE), MSc
Publicerad
2022
Författare
Norén, Fredrik
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Disconnected piled raft is a rather new foundation method, where piles work as an
soil reinforcement instead of supporting the raft directly. The benefit of this method
is that horizontal forces subjecting the soil, will not break or buckle the piles. The
disconnected piled raft method has been performed on large scale projects and this
thesis is done to test the feasibility in Gothenburg clay conditions. A numerical
model in the software PLAXIS were made where different heights of the cushion
were tested along with different parameters for the materials. In the results it
showed that a cushion thickness the same height as the width of the pile were
superior in terms of displacements. Determination of the spacing were also done with
previously mentioned cushion thickness as well as the time depending consolidation
analysis. A sensitivity analysis of the material were made to investigate which of
the parameters did affect the displacements the most. Conclusion of this thesis
were that the disconnected piled raft method is feasible for the Gothenburg clay
conditions if certain criterion is meet.
Beskrivning
Ämne/nyckelord
Disconnected piled raft , clay , PLAXIS , cushion , displacement , numerical model