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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ftdtic:AD0702732 2023-05-15T15:39:38+02:00 ICE CONSTRUCTION - INVESTIGATION OF ACCELERATED BOTTOM-FREEZING TECHNIQUES. Hoffman,C. R. Culbertson,T. L. NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF 1970-02 text/html http://www.dtic.mil/docs/citations/AD0702732 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0702732 en eng http://www.dtic.mil/docs/citations/AD0702732 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS 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 Text 1970 ftdtic 2016-02-18T23:06:17Z 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) Text Barrow Ice Ice Sheet permafrost Point Barrow Sea ice Alaska Defense Technical Information Center: DTIC Technical Reports database Construction Point ENVELOPE(170.217,170.217,-72.317,-72.317) |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
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 |
spellingShingle |
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 Hoffman,C. R. Culbertson,T. L. ICE CONSTRUCTION - INVESTIGATION OF ACCELERATED BOTTOM-FREEZING TECHNIQUES. |
topic_facet |
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 |
description |
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) |
author2 |
NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF |
format |
Text |
author |
Hoffman,C. R. Culbertson,T. L. |
author_facet |
Hoffman,C. R. Culbertson,T. L. |
author_sort |
Hoffman,C. R. |
title |
ICE CONSTRUCTION - INVESTIGATION OF ACCELERATED BOTTOM-FREEZING TECHNIQUES. |
title_short |
ICE CONSTRUCTION - INVESTIGATION OF ACCELERATED BOTTOM-FREEZING TECHNIQUES. |
title_full |
ICE CONSTRUCTION - INVESTIGATION OF ACCELERATED BOTTOM-FREEZING TECHNIQUES. |
title_fullStr |
ICE CONSTRUCTION - INVESTIGATION OF ACCELERATED BOTTOM-FREEZING TECHNIQUES. |
title_full_unstemmed |
ICE CONSTRUCTION - INVESTIGATION OF ACCELERATED BOTTOM-FREEZING TECHNIQUES. |
title_sort |
ice construction - investigation of accelerated bottom-freezing techniques. |
publishDate |
1970 |
url |
http://www.dtic.mil/docs/citations/AD0702732 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0702732 |
long_lat |
ENVELOPE(170.217,170.217,-72.317,-72.317) |
geographic |
Construction Point |
geographic_facet |
Construction Point |
genre |
Barrow Ice Ice Sheet permafrost Point Barrow Sea ice Alaska |
genre_facet |
Barrow Ice Ice Sheet permafrost Point Barrow Sea ice Alaska |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/AD0702732 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766371624675704832 |