Improving Snow Roads and Airstrips in Antarctica
During the 1986-1987 austral summer, snow road and runway test lanes were constructed at McMurdo Station and at South Pole Station. These lanes were monitored during Dec 86-Jan 87, and again in Jan 88. Test sections were constructed of 1) tractor-compacted snow topped with a 15-cm layer of rotary bl...
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ftdtic:ADA211588 2023-05-15T13:44:56+02:00 Improving Snow Roads and Airstrips in Antarctica Lee, Sung M. Haas, Wilbur M. Brown, Robert L. Wuori, Albert F. MICHIGAN TECHNOLOGICAL UNIV HOUGHTON 1989-07 text/html http://www.dtic.mil/docs/citations/ADA211588 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA211588 en eng http://www.dtic.mil/docs/citations/ADA211588 Approved for public release; distribution is unlimited. DTIC AND NTIS Snow Ice and Permafrost Civil Engineering *SNOW *ROADS *BEARING STRENGTH *RUNWAYS RATIOS TEMPERATURE WATER MIXTURES PROFILES SEASONAL VARIATIONS SURFACE PROPERTIES WHEELS LANDING FIELDS ADDITIVES JET TRANSPORT AIRCRAFT GROUND TRAFFIC MELTING POINT HARDNESS SUMMER WOOD ANTARCTIC REGIONS COMPACTING BLOWERS MEASUREMENT DENSITY SAWDUST MAINTENANCE STATIONS *SNOW ROADS CALIFORNIA BEARING RATIO SNOW BLOWERS C-141 AIRCRAFT Text 1989 ftdtic 2016-02-23T04:52:52Z During the 1986-1987 austral summer, snow road and runway test lanes were constructed at McMurdo Station and at South Pole Station. These lanes were monitored during Dec 86-Jan 87, and again in Jan 88. Test sections were constructed of 1) tractor-compacted snow topped with a 15-cm layer of rotary blower processed snow, 2) rotary processed and compacted snow in 15-cm layers to a depth of 60 cm, 3) rotary processed and compacted snow in 15-cm layers incorporating wood sawdust additive mixed at 5% by volume, and 4) rotary- processed snow with 10% sawdust by volume. These test sections were monitored by obtaining temperature and density profiles, Rammsonde hardness profiles, California Bearing Ratio and Clegg surface strength values, and testing for ability to withstand traffic. Wood sawdust added to processed snow in amounts of 5-10% by volume significantly increases the strength of the resulting snow road or runway. Adequate strengths of the snow/sawdust mixtures were achieved for limited use by wheeled C130 aircraft, but additional processing with heat, water or added compaction appears necessary to produce a 25-cm-thick surface layer adequate for frequent use and to accommodate wheeled C141 aircraft. At McMurdo, it was found that the sawdust was not effective in maintaining the integrity of the surface traffic during the thawing season without additional maintenance, whereas at the South Pole, thawing was not a problem since temperatures remained well below the melting point. It was concluded that the McMurdo snow roads were not constructed adequately early in the season to prevent failure and, therefore, required an unduly high maintenance effort during the warm season. Text Antarc* Antarctic Antarctica Ice permafrost South pole South pole Defense Technical Information Center: DTIC Technical Reports database Antarctic Austral Lanes ENVELOPE(18.933,18.933,69.617,69.617) McMurdo Station ENVELOPE(166.667,166.667,-77.850,-77.850) South Pole |
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 *SNOW *ROADS *BEARING STRENGTH *RUNWAYS RATIOS TEMPERATURE WATER MIXTURES PROFILES SEASONAL VARIATIONS SURFACE PROPERTIES WHEELS LANDING FIELDS ADDITIVES JET TRANSPORT AIRCRAFT GROUND TRAFFIC MELTING POINT HARDNESS SUMMER WOOD ANTARCTIC REGIONS COMPACTING BLOWERS MEASUREMENT DENSITY SAWDUST MAINTENANCE STATIONS *SNOW ROADS CALIFORNIA BEARING RATIO SNOW BLOWERS C-141 AIRCRAFT |
spellingShingle |
Snow Ice and Permafrost Civil Engineering *SNOW *ROADS *BEARING STRENGTH *RUNWAYS RATIOS TEMPERATURE WATER MIXTURES PROFILES SEASONAL VARIATIONS SURFACE PROPERTIES WHEELS LANDING FIELDS ADDITIVES JET TRANSPORT AIRCRAFT GROUND TRAFFIC MELTING POINT HARDNESS SUMMER WOOD ANTARCTIC REGIONS COMPACTING BLOWERS MEASUREMENT DENSITY SAWDUST MAINTENANCE STATIONS *SNOW ROADS CALIFORNIA BEARING RATIO SNOW BLOWERS C-141 AIRCRAFT Lee, Sung M. Haas, Wilbur M. Brown, Robert L. Wuori, Albert F. Improving Snow Roads and Airstrips in Antarctica |
topic_facet |
Snow Ice and Permafrost Civil Engineering *SNOW *ROADS *BEARING STRENGTH *RUNWAYS RATIOS TEMPERATURE WATER MIXTURES PROFILES SEASONAL VARIATIONS SURFACE PROPERTIES WHEELS LANDING FIELDS ADDITIVES JET TRANSPORT AIRCRAFT GROUND TRAFFIC MELTING POINT HARDNESS SUMMER WOOD ANTARCTIC REGIONS COMPACTING BLOWERS MEASUREMENT DENSITY SAWDUST MAINTENANCE STATIONS *SNOW ROADS CALIFORNIA BEARING RATIO SNOW BLOWERS C-141 AIRCRAFT |
description |
During the 1986-1987 austral summer, snow road and runway test lanes were constructed at McMurdo Station and at South Pole Station. These lanes were monitored during Dec 86-Jan 87, and again in Jan 88. Test sections were constructed of 1) tractor-compacted snow topped with a 15-cm layer of rotary blower processed snow, 2) rotary processed and compacted snow in 15-cm layers to a depth of 60 cm, 3) rotary processed and compacted snow in 15-cm layers incorporating wood sawdust additive mixed at 5% by volume, and 4) rotary- processed snow with 10% sawdust by volume. These test sections were monitored by obtaining temperature and density profiles, Rammsonde hardness profiles, California Bearing Ratio and Clegg surface strength values, and testing for ability to withstand traffic. Wood sawdust added to processed snow in amounts of 5-10% by volume significantly increases the strength of the resulting snow road or runway. Adequate strengths of the snow/sawdust mixtures were achieved for limited use by wheeled C130 aircraft, but additional processing with heat, water or added compaction appears necessary to produce a 25-cm-thick surface layer adequate for frequent use and to accommodate wheeled C141 aircraft. At McMurdo, it was found that the sawdust was not effective in maintaining the integrity of the surface traffic during the thawing season without additional maintenance, whereas at the South Pole, thawing was not a problem since temperatures remained well below the melting point. It was concluded that the McMurdo snow roads were not constructed adequately early in the season to prevent failure and, therefore, required an unduly high maintenance effort during the warm season. |
author2 |
MICHIGAN TECHNOLOGICAL UNIV HOUGHTON |
format |
Text |
author |
Lee, Sung M. Haas, Wilbur M. Brown, Robert L. Wuori, Albert F. |
author_facet |
Lee, Sung M. Haas, Wilbur M. Brown, Robert L. Wuori, Albert F. |
author_sort |
Lee, Sung M. |
title |
Improving Snow Roads and Airstrips in Antarctica |
title_short |
Improving Snow Roads and Airstrips in Antarctica |
title_full |
Improving Snow Roads and Airstrips in Antarctica |
title_fullStr |
Improving Snow Roads and Airstrips in Antarctica |
title_full_unstemmed |
Improving Snow Roads and Airstrips in Antarctica |
title_sort |
improving snow roads and airstrips in antarctica |
publishDate |
1989 |
url |
http://www.dtic.mil/docs/citations/ADA211588 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA211588 |
long_lat |
ENVELOPE(18.933,18.933,69.617,69.617) ENVELOPE(166.667,166.667,-77.850,-77.850) |
geographic |
Antarctic Austral Lanes McMurdo Station South Pole |
geographic_facet |
Antarctic Austral Lanes McMurdo Station South Pole |
genre |
Antarc* Antarctic Antarctica Ice permafrost South pole South pole |
genre_facet |
Antarc* Antarctic Antarctica Ice permafrost South pole South pole |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA211588 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766208777963438080 |