Zingg, Sara

Sara Zingg

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Sara Zingg

Static effects and aspects of feasibility and design of drainages in tunnelling

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Advance Drainage, Drainage Boreholes, Tunnel, Face Stability, Limit Equilibrium, Fault Zone, Drainage Capacity, Equivalent Hydraulic Conductivity, Borehole Casing, Lead-Time, Groundwater Drawdown, Set..

228 Pages

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Sara Zingg

Static effects and aspects of feasibility and design of drainages in tunnelling

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Collection: Veröffentlichungen des Instituts für Geotechnik (IGT) an der ETH Zürich, Volume 249

228 Pages

Sara Zingg

This PhD thesis investigates the effectiveness of drainage measures with respect to two particularly important problems associated with tunnelling through water-bearing, weak ground: the stability of the tunnel face and the stability and deformation of grouting bodies. Water is an adverse factor with respect to the stability and deformation of underground structures due to the pore water pressure and the seepage forces associated with seepage flow towards the tunnel. Drainage boreholes reduce the pore water pressure and the seepage forces in the vicinity of the cavity. Furthermore, loss of pore water pressure increases the effective stresses and thus the shearing resistance of the ground ("consolidation"), which is favourable in terms the deformation occurring during and after tunnelling.

Sara Zingg

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