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Relating Plastic Potential Function to Experimentally Obtained Dilatancy Observations for Geomaterials with a Confinement-Dependent Dilation Angle
Publisher: American Society of Civil Engineers
Abstract: Dilatancy (volumetric expansion) during yielding is an important aspect of geomaterial behavior that can be mathematically defined using a dilation model. A common way of modeling dilation has been to use a dilation angle, ...
Laboratory Model Test of EPB Shield Tunneling in a Cobble-Rich Soil
Publisher: ASCE
Abstract: Model tests and field measurements were carried out to study the mechanical behavior of cobble-rich soil in response to shield tunneling. In particular, an experimental investigation was carried out using a laboratory-scale ...
Face Stability Analysis of EPB Shield Tunnels in Dry Granular Soils Considering Nonuniform Chamber Pressure and a Dynamic Excavation Process
Publisher: ASCE
Abstract: The support pressure at the tunnel face of earth pressure balance (EPB) shield machines is usually assumed to be uniform from the crown to the invert, which is a notable simplification of reality. In this study, the effects ...
Global versus Local Simulation of Geotechnical Parameters for Tunneling Projects
Publisher: ASCE
Abstract: Urban soft-ground tunneling projects involve significant risks related to the spatial variability and uncertainty in geotechnical parameters. However, standard practice typically does not incorporate spatial trends into ...