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Showing 1 to 12 of 12 for “"Settore ICAR/07 - Geotecnica"”.
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A nonlinear viscoplastic double yield surface constitutive model for geologic materials
A new constitutive model is proposed to describe the stress-strain-time behaviour of clays and organic soils. This approach is based on the framework of overstress viscoplastic theory and can be applied to any elastoplastic (inviscid) model.The most innovative idea of the proposed model is the …
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Seismic analysis of a large size underground cavern
Underground structures are generally assumed to be much safer to earthquake loading, compared to above surface structures. However, many large underground structures have witnessed great damage in recent earthquakes. Thus underground structures in earthquake prone zones should be designed to …
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3D numerical modelling of brittle failure in mechanized excavation of deep tunnels
For long and deep tunnels as currently under construction through the Alps, mechanised excavation by using Tunnel Boring Machines (TBMs) may contribute significantly to savings in construction times and costs. Questions are however posed due to the severe ground conditions which in cases are …
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Uncertainties in the Estimation of the Shear-Wave Velocity and the Small-Strain Damping Ratio from Surface Wave Analysis
L'abstract è presente nell'allegato / the abstract is in the attachment
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Tunnels in swelling ground: simulation of 3D stress paths by triaxial laboratory testing
The research is devoted to study the swelling behaviour in tunnels. A new triaxial testing procedure is developed, which is able to quantify the swelling behaviour of soft rocks and stiff soils. The Caneva Clay is tested both by conventional oedometer swelling tests and by the new triaxial test. …
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A new approach for predicting brittle or ductile failure of rock in deep excavations
L'abstract è presente nell'allegato / the abstract is in the attachment
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Mechanical behaviour of Clay-Shales (Argille Scagliose) and implications on the design of tunnels
In the framework of Geotechnical Engineering and Rock Mechanics many cases are known (described in either the classical or the modern tunnelling bibliography) where, even during construction, large deformations and high stresses in the lining are observed. This is the result of natural phenomena …
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Multistation Methods for Geotechnical Characterization using Surface Waves
This dissertation deals with soil characterization methods based on surface wave propagation applied to geotechnical engineering purposes. This topic has gained much interest in the last decade because of the appealing possibilities given by non-invasive methods, which are at once very flexible and …
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A coupled depth-averaged and three-dimensional numerical model for flow-like landslides interacting with obstacles
L'abstract è presente nell'allegato / the abstract is in the attachment
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Artificial Ground Freezing in sandy soils. Experimental and numerical analysis on the role of fine content on the thermo-hydro-mechanical behavior.
L'abstract è presente nell'allegato / the abstract is in the attachment
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Combined finite-discrete element modelling of key instabilities which characterise deep-seated landslides from massive rock slope failure
The expression “landslide from massive rock slope failure” (MRSF) is used to indicate large-scale landslides characterised by a variety of complex initial failure processes and unpredictable postfailure behaviour. In this context, deep-seated landslides are classified as “landslides from massive …