Treatment of Cracks in Dam Toe with Chemical Grouting for Gudongkou Hydropower Station

Due to temperature stress and foundation restraint,transverse cracks occurred during the pouring of dam toe for Gudongkou Hydropower Station.Leakage through the cracks would endanger the operation of the dam.Since the toe is underwater and is a key componert,its treatment is quite difficult.A simple treatment with chemical grouting has been wsed successfully without impairing the project schedule and construction cost.