CORE-LOC® Repair of Dolos-Armored Jetties at Manasquan Inlet, New Jersey

This paper describes the use of the US Army Corps of Engineers CORE-LOC® concrete armor unit for the repair of dolos-armored jetties at Manasquan, NJ. The prototype repair was based on successful generic two-dimensional and three-dimensional physical model investigations of this repair concept conducted at the Waterways Experiment Station. These first proof-of-concept experiments showed qualitatively, the core-loc repaired test section was more hydraulically stable than the original dolos-armored slope. Heather-Clark et al, at the Council Scientific and Industrial Research, Stellenbosch, South Africa found similar results when testing the core-loc for the repair of dolos-armored slopes. The repair at Manasquan was the first use of core-loc to repair a prototype dolos-armored slope. This paper discusses the design aspects of core-loc unit when used with dolosse. It will cover construction and placement techniques used for the repair. It will discuss how the core-loc units were integrated with the dolos matrix. And finally, it will include some lessons learned from the project.