CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Stone column settlement performance in structured anisotropic clays: the influence of creep

Brian G. Sexton ; Bryan A. McCabe ; Minna Karstunen (Institutionen för bygg- och miljöteknik, Geologi och geoteknik) ; Nallathamby Sivasithamparam
Journal of Rock Mechanics and Geotechnical Engineering (16747755). Vol. 8 (2016), 5, p. 672-688.
[Artikel, refereegranskad vetenskaplig]

The recently developed elasto-viscoplastic Creep-SCLAY1S model has been used in conjunction with PLAXIS 2D to investigate the effectiveness of vibro-replacement in a creep-prone clay. The Creep-SCLAY1S model accounts for anisotropy, bonding, and destructuration, and uses the concept of a constant rate of viscoplastic multiplier to calculate creep strain rate. A comparison of settlement improvement factors with and without creep indicates that ‘total’ settlement improvement factors (primary plus creep) are lower than their ‘primary’ counterparts (primary settlement only). The lowest settlement improvement factors arise for analyses incorporating the effect of bonding and destructuration. Examination of the variations of vertical stress with time and depth has indicated that vertical stress is transferred from the soil to the column as the soil creeps. This results in additional column yielding. In addition, the radial and hoop stresses in the soil are lower for the ‘creep’ case. The reduced radial stresses lead to additional column bulging and hence more settlement, whereas the hoop stress reductions appear to be a secondary effect, caused by additional plastic deformation for the ‘creep’ case. © 2016 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences

Nyckelord: Anisotropy,, Creep; Destructuration, Finite element (FE) method, Stone columns

Den här publikationen ingår i följande styrkeområden:

Läs mer om Chalmers styrkeområden  

Denna post skapades 2016-12-19. Senast ändrad 2017-09-25.
CPL Pubid: 246217


Läs direkt!

Lokal fulltext (fritt tillgänglig)

Länk till annan sajt (kan kräva inloggning)

Institutioner (Chalmers)

Institutionen för bygg- och miljöteknik, Geologi och geoteknik (2005-2017)


Building Futures

Chalmers infrastruktur