DESIGN CRITERIA FOR SNOW RUNWAYS.
The physical characteristics of snow and those processes of metamorphism which contribute to its strength are important considerations in planning the construction of compacted snow runways. Two distinct temperature-dependent processes affect the physical properties of snow: sintering and strength i...
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ftdtic:AD0681220 2023-05-15T16:37:51+02:00 DESIGN CRITERIA FOR SNOW RUNWAYS. Abele,Gunars Ramseier,Rene O. Wuori,Albert F. COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H 1968-11 text/html http://www.dtic.mil/docs/citations/AD0681220 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0681220 en eng http://www.dtic.mil/docs/citations/AD0681220 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Terminal Flight Facilities Snow Ice and Permafrost *RUNWAYS *SNOW ROADS SINTERING STRENGTH(PHYSIOLOGY) HARDNESS COMPACTING LOADS(FORCES) CORRELATION TECHNIQUES TEMPERATURE Text 1968 ftdtic 2016-02-21T16:46:49Z The physical characteristics of snow and those processes of metamorphism which contribute to its strength are important considerations in planning the construction of compacted snow runways. Two distinct temperature-dependent processes affect the physical properties of snow: sintering and strength increase with decreasing temperature. The rate of strength increase and the ultimate strength of snow may be greatly increased by mechanical agitation or depth processing followed immediately by surface compaction. Leveling to produce a smooth surface for aircraft is also necessary. Various combinations of processing and compaction are required depending on the size of aircraft to be operated on the runway. After construction is completed, the natural process of sintering or strengthening must be allowed to proceed for some time before aircraft operations can be initiated. The mechanical properties of processed snow have been correlated with its wheel-load supporting capacity. The correlation shows the effect of such parameters as wheel load, tire contact pressure, and repetitive wheel coverages on the required hardness or strength of a compacted snow layer. Strength profiles which can be expected from certain snow processing and compaction procedures are shown and compared with required strength profiles for various types of wheeled vehicles and aircraft. The purpose of this study was to combine the knowledge gained from fundamental research in the processes of sintering with methods and procedures developed by engineers for using snow as a construction material. (Author) Text Ice permafrost Defense Technical Information Center: DTIC Technical Reports database |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
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language |
English |
topic |
Terminal Flight Facilities Snow Ice and Permafrost *RUNWAYS *SNOW ROADS SINTERING STRENGTH(PHYSIOLOGY) HARDNESS COMPACTING LOADS(FORCES) CORRELATION TECHNIQUES TEMPERATURE |
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Terminal Flight Facilities Snow Ice and Permafrost *RUNWAYS *SNOW ROADS SINTERING STRENGTH(PHYSIOLOGY) HARDNESS COMPACTING LOADS(FORCES) CORRELATION TECHNIQUES TEMPERATURE Abele,Gunars Ramseier,Rene O. Wuori,Albert F. DESIGN CRITERIA FOR SNOW RUNWAYS. |
topic_facet |
Terminal Flight Facilities Snow Ice and Permafrost *RUNWAYS *SNOW ROADS SINTERING STRENGTH(PHYSIOLOGY) HARDNESS COMPACTING LOADS(FORCES) CORRELATION TECHNIQUES TEMPERATURE |
description |
The physical characteristics of snow and those processes of metamorphism which contribute to its strength are important considerations in planning the construction of compacted snow runways. Two distinct temperature-dependent processes affect the physical properties of snow: sintering and strength increase with decreasing temperature. The rate of strength increase and the ultimate strength of snow may be greatly increased by mechanical agitation or depth processing followed immediately by surface compaction. Leveling to produce a smooth surface for aircraft is also necessary. Various combinations of processing and compaction are required depending on the size of aircraft to be operated on the runway. After construction is completed, the natural process of sintering or strengthening must be allowed to proceed for some time before aircraft operations can be initiated. The mechanical properties of processed snow have been correlated with its wheel-load supporting capacity. The correlation shows the effect of such parameters as wheel load, tire contact pressure, and repetitive wheel coverages on the required hardness or strength of a compacted snow layer. Strength profiles which can be expected from certain snow processing and compaction procedures are shown and compared with required strength profiles for various types of wheeled vehicles and aircraft. The purpose of this study was to combine the knowledge gained from fundamental research in the processes of sintering with methods and procedures developed by engineers for using snow as a construction material. (Author) |
author2 |
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H |
format |
Text |
author |
Abele,Gunars Ramseier,Rene O. Wuori,Albert F. |
author_facet |
Abele,Gunars Ramseier,Rene O. Wuori,Albert F. |
author_sort |
Abele,Gunars |
title |
DESIGN CRITERIA FOR SNOW RUNWAYS. |
title_short |
DESIGN CRITERIA FOR SNOW RUNWAYS. |
title_full |
DESIGN CRITERIA FOR SNOW RUNWAYS. |
title_fullStr |
DESIGN CRITERIA FOR SNOW RUNWAYS. |
title_full_unstemmed |
DESIGN CRITERIA FOR SNOW RUNWAYS. |
title_sort |
design criteria for snow runways. |
publishDate |
1968 |
url |
http://www.dtic.mil/docs/citations/AD0681220 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0681220 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/AD0681220 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766028155880996864 |