oa Civil Engineering = Siviele Ingenieurswese - An emergency valve for a dam
|Article Title||An emergency valve for a dam|
|© Publisher:||South African Institution Of Civil Engineering (SAICE)|
|Journal||Civil Engineering = Siviele Ingenieurswese|
|Publication Date||Feb 1963|
|Pages||75 - 77|
|Keyword(s)||Cut off pressure, Emergency gates, Njelele Dam and Repair work on the outlet valves|
When it was found impossible to employ the emergency gates to cut off pressure prior to repair work on the outlet valves of the Njelele Dam, a hollow concrete ball was used as an alternative emergency valve. The circumstances are outlined in this short paper which descriptionbes also the making and handling of the concrete ball.
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