Prediction of displacements occurring around an excavation is influenced by the constitutive model used to describe the pre-failure behaviour of the soil. An experimental program has been carried out, in which samples of a reconstituted clay were subjected to stress paths similar to those occurring around excavations. A simple linear elastic-perfectly plastic soil model, and an elastic-plastic soil model with isotropic deviatoric hardening, have been calibrated on the experimental results, and then used in a finite element analysis to simulate the behaviour of an open excavation supported by an embedded retaining wall propped at the top. Comparison among the results of the analyses permitted to assess the influence of pre-failure non linearity on the ground movements predicted around the excavation. Also, the influence of the initial in situ stress state, the wall stiffness and the drainage conditions were studied using the elastic-plastic soil model with isotropic deviatoric hardening.
Balkema,Rotterdam
The influence of pre-failure soil modelling on the behaviour of open excavations / Callisto, Luigi; Amorosi, Angelo; Rampello, Sebastiano. - STAMPA. - 1:(1999), pp. 89-96. (Intervento presentato al convegno XII European Conference on of Soil Mechanichs and Geotechnical Engineering on "Geotechnical engineering for transportation infrastructure" tenutosi a Amsterdam;Netherlands nel 1999).
The influence of pre-failure soil modelling on the behaviour of open excavations
CALLISTO, Luigi;AMOROSI, ANGELO;RAMPELLO, SEBASTIANO
1999
Abstract
Prediction of displacements occurring around an excavation is influenced by the constitutive model used to describe the pre-failure behaviour of the soil. An experimental program has been carried out, in which samples of a reconstituted clay were subjected to stress paths similar to those occurring around excavations. A simple linear elastic-perfectly plastic soil model, and an elastic-plastic soil model with isotropic deviatoric hardening, have been calibrated on the experimental results, and then used in a finite element analysis to simulate the behaviour of an open excavation supported by an embedded retaining wall propped at the top. Comparison among the results of the analyses permitted to assess the influence of pre-failure non linearity on the ground movements predicted around the excavation. Also, the influence of the initial in situ stress state, the wall stiffness and the drainage conditions were studied using the elastic-plastic soil model with isotropic deviatoric hardening.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
