ARCUS | Arctic Research Consortium of the United States

7th Annual ARCUS Award for Arctic Research Excellence


Submitted by   Nathanael Vaughan
Authors   Nathanael Vaughan and R. Carlson
Category   Physical Science
Title   Impacts of Ice Forces on Stream Bank Protection
Affiliation   Civil and Environmental Engineering, University of Alaska Fairbanks, Fairbanks, AK, USA

Abstract

Currently, a publication from the Federal Highways Administration, "Design of Riprap Revetment," or HEC-11, forms the design procedure for riprap under ice conditions in Alaska. HEC-11 recommends a stability factor of 1.6-2.0 for ice impact specifically, but otherwise neglects ice influence on design. This paper investigates modifying the HEC-11 design procedure for four ice influence scenarios: ice anchoring with specific gravity reduction, raft ice pushup, velocity increase beneath ice jams, and increased longitudinal shear due to ice cover. Stability factors for three of these scenarios were then expressed in terms of the original HEC-11 stability factor, while the other was expressed independently of the conditions considered in HEC-11.