Hydraulic Model Study of Port Huron Ice Control Structure

The ice discharge through an opening in an ice control structure was documented to be a function of the floe size, ice type, ice floe conditions and vessel direction. The model data for the average ice discharge per vessel transit scaled to prototype values compared favorably with data taken at the...

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Bibliographic Details
Main Authors: Calkins,Darryl J, Deck,David S, Sodhi,Devinder S
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
Format: Text
Language:English
Published: 1982
Subjects:
Snow
Ice and Permafrost
Statistics and Probability
Mechanics
*ICE FORMATION
*DYNAMIC LOADS
*HYDRAULIC MODELS
*LOAD CONTROL
*ICE OPENINGS
*VESSEL TRAFFIC SYSTEMS
LABORATORY TESTS
CONTROL SYSTEMS
EXPERIMENTAL DESIGN
COMPARISON
WINTER
ICE
MATHEMATICAL ANALYSIS
SITE SELECTION
RIVERS
FIELD CONDITIONS
DOWNSTREAM FLOW
NAVIGATIONAL AIDS
ENVIRONMENTAL ENGINEERING
SYNTHETIC MATERIALS
GREAT LAKES
ICS(Ice Control Systems)
St Marys River
Lake Huron
St. Marys River
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/ADA123715
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA123715
Description
Summary:The ice discharge through an opening in an ice control structure was documented to be a function of the floe size, ice type, ice floe conditions and vessel direction. The model data for the average ice discharge per vessel transit scaled to prototype values compared favorably with data taken at the St. Marys River ice control structure (ICS). The model results of the force measurements were also consistent with data taken at the St. Marys ICS. The dynamic loading conditions were independent of vessel direction. The dynamic loading to the structure using 3 types of ice (plastic, natural and urea-doped) showed a considerable difference in their means and standard deviations. The urea-doped ice was evaluated for dynamic loading conditions, and reasonable peak values of 3 to 5 times the mean load at each measuring position were recorded, independent of vessel direction. It appears that synthetic random ice floes may be used in model studies where ice discharge through an opening in a structure needs to be documented. This study shows the synthetic random ice floe discharge to fall reasonably within the values obtained for natural ice discharge for both rafted and non-rafted ice fields above the ICS. However, the question of whether synthetic ice can be used for analyzing force distributions and dynamic force loading criteria cannot be fully answered at this time because the load distributions of the synthetic and natural floes appear to differ. (Author)

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