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Some geomechanical aspects of subaqueous tunnels

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The main characteristics of subaqueous tunnel construction include a high potential of damage, relatively high pore pressures and limited pre-construction accessibility. Potential hazards include high water inflows or even a complete flooding of the tunnel in the case of a hydraulic link opening up to the seabed. High pore pressures may also occur at small depths of cover, i.e. in combination with low effective stresses and low shear strengths of the ground, thus having a particularly adverse effect in terms of stability and potential deformations. In the seminar issues of stability and deformation will be discussed by means of examples taken from recent or future tunnel projects.

This talk is part of the Engineering Department Geotechnical Research Seminars series.

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