Analysis of settlements in piled raft systems founded in soft soil under consolidation process

In piled raft systems (PRSs), the piles are used to support load or to control settlements. These systems, when founded in soft soils that are then consolidated by loads or subsidence processes, can induce negative friction in the piles and other phenomena related to variations in the distribution o...

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Bibliographic Details
Published in:Canadian geotechnical journal 2020-04, Vol.57 (4), p.537-548
Main Authors: Rodriguez Rincón, Edgar, Cunha, Renato Pinto da, Caicedo Hormaza, Bernardo
Format: Article
Language:English
Subjects:
affaissement
Analysis
argiles
Centrifuge model
centrifuge modelling
Centrifuges
Charge distribution
clays
Consolidation
Distribution
eaux souterraines
entassement
extraction de l’eau de la couche profonde du sol
extraction of water from soil deep layer
Friction
Geophysics
groundwater
Load
Load distribution
modélisation par centrifugation
piled raft system
Piles
settlement
Settling
Soft soils
Soil
Soil layers
Soil settlement
Soil water
Soils
Stress concentration
subsidence
système de radeaux sur pilotis
Water, Underground
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Summary:In piled raft systems (PRSs), the piles are used to support load or to control settlements. These systems, when founded in soft soils that are then consolidated by loads or subsidence processes, can induce negative friction in the piles and other phenomena related to variations in the distribution of load or settlements. This paper presents the results of physical modeling in a geotechnical centrifuge capable of different distributions of piles under a raft. As a result, the influence of consolidation and extraction of water from a deep soil layer on the behavior of the PRS model was analyzed. It was determined that the processes associated with the extraction of water from the deep soil layer induce larger settlements. A separation between the raft and the soil is possible, as well as a change in the behavior of the PRS.
ISSN:0008-3674
1208-6010
DOI:10.1139/cgj-2018-0702