Conventional Concrete for Dam Overtopping Protection

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Conventional Concrete Systems• Continuous layer of conventional or massconcrete placed on downstream face ofembankment dam to provide a flow surface• System must remain intact, without defects• Guide walls along sides may be required• May be located on portion or entire face• Must protect abutment groins andunderlying embankment from rapid erosion
Case Histories• Limited examples of concrete spillwaysconstructed on embankment dams cited:– Box culvert service spillways at Meeks Cabinand Currant Creek Dams (Reclamation)– Open chute emergency and service spillwaysat seven U.S. dams (various owners)• Similar in concept to concrete overtoppingprotection, using reinforced concrete slabsand generally waterstopped joints
Page 4 and 5: Box Culvert Spillways on DamsMeeks
Page 6 and 7: Uplift Pressures on Slab• Uplift
Page 8 and 9: Uplift Pressure EstimatesMean uplif
Page 10 and 11: Differential Settlement• Less lik
Page 12 and 13: Big Sandy Dam, WYFrost Heave
Page 14 and 15: Defensive Design Measures• Waters
Page 16 and 17: Uplift Pressure Failure Sequence►
Page 18 and 19: Case History - ConcreteOvertopping
Page 20 and 21: A. R. Bowman Dam
Page 22 and 23: Overtopping Protection Systems• T
Page 24 and 25: CRCS Overtopping Protection• Rein
Page 26 and 27: CRCS Downstream Toe Detail
Page 28 and 29: CRCS Hydraulic Model Study
Page 30 and 31: CRCS Water Surface Profiles
Page 32 and 33: Structural Design for CRCS• Conti
Page 34: Questions?

Conventional Concrete for Dam Overtopping Protection

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