Author(s): J. A. Nadeau

Linked Author(s):

Keywords: Rticulating Concrete Blocks (ACB’s); Erosion Prevention; Overtopping Protection; Slope Protection; ASTM; FHWA; Factor of Safety Determination

Abstract: This paper will provide an overview of Articulating Concrete Blocks (ACB’s) from three perspectives: 1. the Manufacturer, 2. The Engineer and 3. The Researcher and how these independent entities interact with each other and the regulatory community to further the scientific understanding and use of ACB systems. ACB’s, since their development in the late 1970’s, represent a growing choice of design engineers in economically solving their critical erosion prevention problems as well as a variety of other non-hydraulic applications. Typical applications of ACB’s are found in protecting channels and canals, dam spillways and embankments, bridge piers and abutments, river bank stabilization projects, boat ramps and wet stream crossings. The ACB manufacturers work closely with both the ACB design engineer, dam safety and environmental regulators and ACB researchers. Design challenges faced by the engineering and regulatory communities include but are not limited to non-linear flow paths, converging flows and hydraulic jump in their efforts to provide a robust and economical solution for their clients. The research community in working with the manufacturers have developed much data and insight into ACB performance and limitations since standardized testing started in the mid 1980’s, however each manufacturer “owns” this information and is reluctant to share with other manufacturer’s. Recent testing extending the length of the ACB revetment being tested has shown the consistent development of aerated flows which need to be further researched along with the hydraulic jump testing including analysis protocols being developed and converging non-linear flow scenarios.

DOI: https://doi.org/10.15142/T3360628160853

Year: 2016