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Investigations Relating to Seepage Through a Natural Side Embankment for a Reservoir Project

Author(s): Heigerth Gunther

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Keywords: Seepage; Hydro-geology; Slope stability; Potential method; Reservoir embankment

Abstract: Seepage through reservoir slopes to a neighbouring valley may involve serious problems. For a hydro project in southern Turkey (Client DSI/Ankara, Consultant chaired by Verbund-Plan/Vienna), it was necessary to investigate an unfavourably bedded flysh„side embankment “showing slide scars, which forms one of the reservoir slopes. A large number of in-situ and laboratory investigations were carried out to obtain information on the hydro-geological and geotechnical details. Using a mathematical model, underground flow patterns and pressures were analysed using the potential method, and the sliding stability of the downstream slope was analysed assuming a variety of different characteristic values and engineering measures. This led to a proposal providing for a grout curtain and a drainage curtain as well as a monitoring system, which would ensure the required safety and allowed adjustment during operation.


Year: 1999

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