ICE CONSTRUCTION - INVESTIGATION OF ACCELERATED BOTTOM-FREEZING TECHNIQUES.

Methods for improving the surface and structural characteristics of natural sea ice are needed to advance polar operational capabilities. Surface flood/freeze techniques are effective for improving floating ice sheets; accelerated bottom-freezing techniques are needed for constructing grounded and n...

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Bibliographic Details
Main Authors: Hoffman,C. R., Culbertson,T. L.
Other Authors: NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF
Format: Text
Language:English
Published: 1970
Subjects:
Snow
Ice and Permafrost
Civil Engineering
Structural Engineering and Building Technology
(*CONSTRUCTION
POLAR REGIONS)
(*SEA ICE
STRUCTURES)
FREEZING
THICKNESS
PIERS
SEA WATER
ATMOSPHERIC TEMPERATURE
SOLAR RADIATION
LANDING FIELDS
CONVECTION(HEAT TRANSFER)
STABILIZATION
PAVEMENTS
FOUNDATIONS(STRUCTURES)
ALASKA
*COLD WEATHER CONSTRUCTION
POINT BARROW(ALASKA)
ICE CONSTRUCTION
Construction Point
Barrow
Ice
Ice Sheet
permafrost
Point Barrow
Sea ice
Alaska
Online Access:http://www.dtic.mil/docs/citations/AD0702732
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0702732
Description
Summary:Methods for improving the surface and structural characteristics of natural sea ice are needed to advance polar operational capabilities. Surface flood/freeze techniques are effective for improving floating ice sheets; accelerated bottom-freezing techniques are needed for constructing grounded and near-shore ice structures such as piers, docks and causeways at polar coastal bases. Investigations on accelerated bottom-freezing systems including field tests at Point Barrow, Alaska during the spring of 1969 showed that liquid convection cells have excellent potential for thickening, stabilizing and anchoring near-shore ice structures. Cells protruding through a natural ice sheet into seawater will 9produce ice along the entire length of cell with the ice production rate dependent upon the seawater temperature, the prevailing air temperature, and the thickness of the mass around the cell. 9For maximum ice growth, it was found that the cell should be of maximum size congruent with handling equipment and painted white to reflect solar radiation. It was concluded that additional laboratory and field tests should be conducted to improve cell performance and field application. (Author)

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