Hangar Floor Settlements at Thule Air Base, Greenland
An investigation has been made of hangar floor settlement problems at Thule Air Base, Greenland. Inspection of existing instrumentation and soil- cooling systems were accomplished. Results of this inspection are presented. Existing temperature sensors were found to be in excellent condition; however...
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ftdtic:AD0867561 2023-05-15T16:26:52+02:00 Hangar Floor Settlements at Thule Air Base, Greenland Tobiasson, Wayne Lowry, III, J AIR FORCE WEAPONS LAB KIRTLAND AFB NM 1970-03 text/html http://www.dtic.mil/docs/citations/AD0867561 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0867561 en eng http://www.dtic.mil/docs/citations/AD0867561 Approved for public release; distribution is unlimited. DTIC AND NTIS Snow Ice and Permafrost Structural Engineering and Building Technology *FOUNDATIONS(STRUCTURES) *HANGARS CONSTRUCTION FAILURE(MECHANICS) FLOORS FREEZING GREENLAND INSTRUMENTATION MELTING MILITARY FACILITIES SOILS *COLD WEATHER CONSTRUCTION *HANGAR FLOOR SETTLING THULE AIR FORCE BASE Text 1970 ftdtic 2016-02-24T09:08:33Z An investigation has been made of hangar floor settlement problems at Thule Air Base, Greenland. Inspection of existing instrumentation and soil- cooling systems were accomplished. Results of this inspection are presented. Existing temperature sensors were found to be in excellent condition; however, readout capability was poor. Pumping of ground water has removed no fines from the fill which might have caused settlement. Major cause of settlement was found to be thawing of permafrost under floors. Pumping of ground water has caused thawing which has contributed to settlement. Duct blockages in the soil-cooling system has also allowed thawing to occur resulting in settlement. Recommendations are made to control further hangar settlement. Blocked ducts in the soil-cooling system should be cleared on an annual basis. The water table should be lowered by lowering the water level in nearby Lake Eddy. Recommendations were also made to improve instrumentation in order that effective operation and maintenance procedures for hangar foundations could be developed. Text Greenland Ice permafrost Thule Air Thule Air Base Thule Defense Technical Information Center: DTIC Technical Reports database Greenland Thule Air Base ENVELOPE(-68.703,-68.703,76.531,76.531) |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Snow Ice and Permafrost Structural Engineering and Building Technology *FOUNDATIONS(STRUCTURES) *HANGARS CONSTRUCTION FAILURE(MECHANICS) FLOORS FREEZING GREENLAND INSTRUMENTATION MELTING MILITARY FACILITIES SOILS *COLD WEATHER CONSTRUCTION *HANGAR FLOOR SETTLING THULE AIR FORCE BASE |
spellingShingle |
Snow Ice and Permafrost Structural Engineering and Building Technology *FOUNDATIONS(STRUCTURES) *HANGARS CONSTRUCTION FAILURE(MECHANICS) FLOORS FREEZING GREENLAND INSTRUMENTATION MELTING MILITARY FACILITIES SOILS *COLD WEATHER CONSTRUCTION *HANGAR FLOOR SETTLING THULE AIR FORCE BASE Tobiasson, Wayne Lowry, III, J Hangar Floor Settlements at Thule Air Base, Greenland |
topic_facet |
Snow Ice and Permafrost Structural Engineering and Building Technology *FOUNDATIONS(STRUCTURES) *HANGARS CONSTRUCTION FAILURE(MECHANICS) FLOORS FREEZING GREENLAND INSTRUMENTATION MELTING MILITARY FACILITIES SOILS *COLD WEATHER CONSTRUCTION *HANGAR FLOOR SETTLING THULE AIR FORCE BASE |
description |
An investigation has been made of hangar floor settlement problems at Thule Air Base, Greenland. Inspection of existing instrumentation and soil- cooling systems were accomplished. Results of this inspection are presented. Existing temperature sensors were found to be in excellent condition; however, readout capability was poor. Pumping of ground water has removed no fines from the fill which might have caused settlement. Major cause of settlement was found to be thawing of permafrost under floors. Pumping of ground water has caused thawing which has contributed to settlement. Duct blockages in the soil-cooling system has also allowed thawing to occur resulting in settlement. Recommendations are made to control further hangar settlement. Blocked ducts in the soil-cooling system should be cleared on an annual basis. The water table should be lowered by lowering the water level in nearby Lake Eddy. Recommendations were also made to improve instrumentation in order that effective operation and maintenance procedures for hangar foundations could be developed. |
author2 |
AIR FORCE WEAPONS LAB KIRTLAND AFB NM |
format |
Text |
author |
Tobiasson, Wayne Lowry, III, J |
author_facet |
Tobiasson, Wayne Lowry, III, J |
author_sort |
Tobiasson, Wayne |
title |
Hangar Floor Settlements at Thule Air Base, Greenland |
title_short |
Hangar Floor Settlements at Thule Air Base, Greenland |
title_full |
Hangar Floor Settlements at Thule Air Base, Greenland |
title_fullStr |
Hangar Floor Settlements at Thule Air Base, Greenland |
title_full_unstemmed |
Hangar Floor Settlements at Thule Air Base, Greenland |
title_sort |
hangar floor settlements at thule air base, greenland |
publishDate |
1970 |
url |
http://www.dtic.mil/docs/citations/AD0867561 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0867561 |
long_lat |
ENVELOPE(-68.703,-68.703,76.531,76.531) |
geographic |
Greenland Thule Air Base |
geographic_facet |
Greenland Thule Air Base |
genre |
Greenland Ice permafrost Thule Air Thule Air Base Thule |
genre_facet |
Greenland Ice permafrost Thule Air Thule Air Base Thule |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/AD0867561 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766015874416771072 |