Minimizing Roadway Embankment Damage from Flooding (2016) / Chapter Skim
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xi Note: Many of the photographs, figures, and tables in this report have been converted from color to grayscale for printing. The electronic version of the report (posted on the web at www.trb.org)
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SUMMARY MINIMIZING ROADWAY EMBANKMENT DAMAGE FROM FLOODING Roadway embankment damage from flooding is a shared concern among all U.S. states.
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2 In addition to the technical aspects previously described, the decision-making process is influenced by legal, regulatory, and funding aspects. After a failure, all decisions about the type of repairs as well as whether the same design will be repeated or whether betterments will be sought (temporary versus permanent, changing stream course, raising the freeboard)
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3 5. Concrete lining 6.
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4 vey questionnaire is included in Appendix A An outline of the report is provided herein.
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5 This section highlights major features of such embankments versus those of levees. The relevant documents and guidelines available to aid in the design of embankments and levees are presented herein.
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6 Coastal Versus Riverine Mechanisms Coastal environments exhibit flow conditions in which factors such as tides, wind-generated waves, and storm surges play an essential role. Waves and tides represent an unsteady, periodic, pulsating, and intermittent flow component.
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7 Coastal highways, on the other hand, may be subjected to hurricanes and the associated ocean surges and waves that may overtop an embankment for a relatively shorter period; that is, a couple of hours. The resulting damage, however, could be greater than that of rivers because of the higher velocities encountered.
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