IMPACTS OF ICE FORCES ON STREAM BANK PROTECTION
At the request of the Alaska Department of Transportation and Public Facilities the authors quantitatively assessed the effects of five ice-related scenarios on riprap stability. Currently, a publication from the Federal Highway Administration, "Design of Riprap Revetment", or HEC-11, forms the design procedure for riprap under ice conditions. HEC-11 recommends a stability factor of 1.6-2.0 for ice impact specifically, but otherwise neglects ice influence on design. The five scenarios considered are riprap specific gravity reduction, raft ice impact, raft ice pushup, velocity increase beneath ice jams, and increased tractive stress due to ice cover. Stability factors for three of these conditions were then expressed in terms of the original HEC-11 stability factor, while two were expressed independently of the conditions considered in HEC-11. Generally, the authors found ice influence to be highly site specific and the limiting design variable for riprap revetment in northern rivers.
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Corporate Authors:
Alaska Department of Transportation and Public Facilities
3132 Channel Drive
Juneau, AK United States 99801-7898 -
Authors:
- Vaughan, N
- Albert, J
- Carlson, R
- Publication Date: 2002-8-1
Language
- English
Media Info
- Features: Appendices; Figures; References; Tables;
- Pagination: 75 p.
Subject/Index Terms
- TRT Terms: Banks (Waterways); Coast and river protective works; Force; Ice; Riprap; River ice; Stability analysis; Streams
- Geographic Terms: Alaska
- Subject Areas: Geotechnology; Highways; Hydraulics and Hydrology; Marine Transportation; I26: Water Run-off - Freeze-thaw; I42: Soil Mechanics;
Filing Info
- Accession Number: 00940926
- Record Type: Publication
- Report/Paper Numbers: FHWA-AK-RD-02-03
- Files: TRIS, STATEDOT
- Created Date: Apr 22 2003 12:00AM