Erosion Mechanisms below a vertical plain Jet on a Non-Cohesive Soil Bed

This experimental research is focused on fail mechanisms in non-cohesive soil beneath the jet with a Jet Erosion Test(JET). A vertical plain jet impinges fluid to a sand bed, which causes zero shear stress beneath the jet averaged over time. Many erosion theories would say that no pick-up happen at that point. <br/><br/>E_c=u/(√(H⁄d) √(ΔgD50 ))...

Impact of spatial variability of subsoil stiffness on immersed tunnels

Due to increased traffic density, there is a tendency to construct larger immersed tunnels with larger tunnel elements both in transversal and longitudinal direction resulting in a more critical design of the joints. Especially for those tunnels with relatively soft foundation and high siltation, there is no mature experience for reference. This...