Cellular Cofferdam Design and Practice

by Edwin Paul Swatek, Jr.,

Serial Information: Journal of the Waterways and Harbors Division, 1967, Vol. 93, Issue 3, Pg. 109-132

Document Type: Journal Paper


Several recent high head steel sheetpile cellular cofferdams are described, including comments on their design and construction. Included is a description of the 115-ft deep Markland powerhouse cofferdam. Cell movement, interlock stress determination, sliding resistance, cell drainage, overturning stability, driving penetration and sheet-pile failures are discussed. The factor of shape in the plan arrangement of cells is mentioned. One use of bracing struts in combination with partial mass stability of cells is described. This paper principally treats cofferdams founded on rock, filled with granular materials. The use of a deflector for constructing cells in turbulent water is described. New developments and future trends are mentioned.

Subject Headings: Cofferdams | Steel construction | Granular materials | Power plants | Load and resistance factor design | Drainage | Piles | Failure analysis

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