Use of Asphalt in Treatment of Dam Foundation Leakage, Stewartsville Damby Boro Lukajic, Ontario Hydro, Toronto, Ont, Canada,
Grant Smith, Ontario Hydro, Toronto, Ont, Canada,
John Deans, Ontario Hydro, Toronto, Ont, Canada,
Abstract: This paper presents the recent development and application of a hot asphalt grouting technique used to stop a 5,000 Imperial Gallons Per Minute (IGPM) (22,000 lpm) dam leakage under full reservoir operating head. Two zones of major leakage were successfully sealed in 1983 and 1984 by simultaneous injection of hot asphalt and conventional cement grouts. This method was necessary in order to deal with the high velocity, turbulent water flow without plugging the adjacent foundation drain. In addition to improving the integrity of the dam foundation, the grouting eliminated water flow within the dam's inspection tunnel which was a safety hazard to personnel and the plant.
Subject Headings: Dam foundations | Grouting | Leakage | Cement | Turbulent flow | Water flow | Drainage | Laboratory tests
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