Search Results - "Vitali, Osvaldo P. M."

Buoyancy effect on shallow tunnels by Vitali, Osvaldo P.M., Celestino, Tarcisio B., Bobet, Antonio

“…When a shallow tunnel is excavated, an overall upward movement appears as a result of the weight removal from the excavation. This movement is analogous to…”
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Analytical Solution for a Deep Circular Tunnel in Anisotropic Ground and Anisotropic Geostatic Stresses by Vitali, Osvaldo P. M., Celestino, Tarcisio B., Bobet, Antonio

“…Rock masses that have a well-defined structure may also present a remarked in situ stress anisotropy; thus, the misalignment of a tunnel with the geostatic…”
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Influence of Overburden Rock Characteristics on Stress Arching and Surface Subsidence Over Salt Caverns by Vitali, Osvaldo P. M., Vitali, Felipe P. M.

“…The urgency for energy transition from non-renewable to renewable sources has highlighted the importance of salt caverns for storing gases and disposing of…”
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Seismic response of deep circular tunnels subjected to S-waves: Axial bending by Savigamin, Chatuphat, Bobet, Antonio, Vitali, Osvaldo P.M.

“…Ovaling deformation of circular tunnels has received great interest from the tunneling community because this mode of seismic-induced deformation is considered…”
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Analytical solution for tunnels not aligned with geostatic principal stress directions by Vitali, Osvaldo P.M., Celestino, Tarcisio B., Bobet, Antonio

“…It is well-known that rock masses may present marked stress anisotropy. However, most of the tunnel analyses (numerical and analytical) assume the tunnel axis…”
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3D face effects of tunnels misaligned with the principal directions of material and stress anisotropy by Vitali, Osvaldo P.M., Celestino, Tarcisio B., Bobet, Antonio

“…•Far-field shear stresses occur when tunnels are misaligned with principal stresses.•Far-field axial shear stresses induce axial deformations in tunnels.•In…”
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Shallow tunnels misaligned with geostatic principal stress directions: Analytical solution and 3D face effects by Vitali, Osvaldo P.M., Celestino, Tarcisio B., Bobet, Antonio

“…•An axial shear appears on tunnels misaligned with geostatic principal stresses.•Far-field shear distorts the tunnel cross-section in the axial…”
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Numerical analysis of relative density effects on shallow TBM tunnel excavation: Ground behavior and principal strains at surface in greenfield conditions by Vitali, Felipe P.M., Vitali, Osvaldo P.M., Celestino, Tarcisio B., Bobet, Antonio

“…•Numerical modeling to investigate relative density effects on shallow TBM tunneling.•Calibrated NorSand model for sandy soil behavior with different relative…”
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Construction strategies for a NATM tunnel in São Paulo, Brazil, in residual soil by Vitali, Osvaldo P.M., Celestino, Tarcisio B., Bobet, Antonio

“…Due to the fast growth of urban areas worldwide, the demand for tunnels in developed areas is increasing. The design and construction of those tunnels are…”
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3D finite element modelling optimization for deep tunnels with material nonlinearity by Vitali, Osvaldo P.M., Celestino, Tarcisio B., Bobet, Antonio

“…3D modeling of tunnels using a nonlinear ground model is still a time-consuming task because it usually requires a large number of incremental phases with…”
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Behavior of tunnels excavated with dip and against dip by Vitali, Osvaldo P.M., Celestino, Tarcisio B., Bobet, Antonio

“…Rock masses with remarked rock structure are likely to be highly anisotropic; thus, the relative orientation of the tunnel with respect to the rock structure…”
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