Toskanes were developed as an alternative scour countermeasure where riprap is not feasible or available in large sizes. The Toskane design procedure is based on results of a hydraulic model study of several different piers and abutments. Toskanes can be fabricated in sizes to meet the design requirements. One example of installing Toskanes at a bridge with a pier and vertical abutments is presented. Criteria are provided to size the Toskane. Techniques for installation are suggested and costs for the project are estimated.
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References
1.
Coastal Engineering Research Center.Shore Protection Manual, Vol. 2, 4th ed. Department of the Army, Waterways Experiment Station, Corps of Engineers, 1984.
2.
RuffJ. F., and FotherbyL. M.Bridge Scour Protection Systems Using Toskanes—Phase I, Final Report. Research Project 91-02. Colorado State University, Fort Collins, June 1995.
