12.07.2015 Views

1 - Alaska Energy Data Inventory

1 - Alaska Energy Data Inventory

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e cANALYSIS OF CONFINED PENSTOCKS. FOR EXTERNAL HEADI. SCOPEThe purpose of this section is to give two methods of anaJ.yzing a penstock,in rock nth the annular space between the steel liner and bore backf:Ulednth concrete, for external water pressure. The two methods discussedare those of Vaughan and Amstutz.II. DEFINITIONSFigureIYo =radial gap between steel liner and concrete due to all causes,inchesR = inside radius of steel liner, inchesT= thiclmess of steel liner, inchesI

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