X-Ray Photography Method for Experimental Studies of the Frozen Fringe Characteristics of Freezing Soil
The main objectives of this report are: (1) To describe the development of an X-ray photographic method for observing the frost-heaving properties of soil, especially the characteristics of the frozen fringe; (2) To describe observations of the temperature and strain field change in the frozen fring...
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ftdtic:ADA222448 2023-05-15T16:37:35+02:00 X-Ray Photography Method for Experimental Studies of the Frozen Fringe Characteristics of Freezing Soil Akagawa, Satoshi COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH 1990-02 text/html http://www.dtic.mil/docs/citations/ADA222448 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA222448 en eng http://www.dtic.mil/docs/citations/ADA222448 Approved for public release; distribution is unlimited. DTIC AND NTIS Soil Mechanics Snow Ice and Permafrost Photography *FROST HEAVE *X RAY PHOTOGRAPHY *PHOTOGRAPHIC ANALYSIS *SOIL MECHANICS MEASUREMENT TEMPERATURE THICKNESS EXPERIMENTAL DATA EDGES DEFORMATION SPHERES STRAIN RATE GRIDS(COORDINATES) THREE DIMENSIONAL SOILS PROFILES FREEZING ICE MATHEMATICAL ANALYSIS THERMAL CONDUCTIVITY GEOMETRY MARKERS FROZEN SOILS EXPANSION RANGE(EXTREMES) DISTORTION THERMOCOUPLES PHOTOGRAPHS SOURCES IMAGE PROCESSING MATHEMATICAL MODELS TEST AND EVALUATION DATA BASES FREEZING SOILS ICE LENSES AST42 PE62730A WU001 Text 1990 ftdtic 2016-02-22T23:44:17Z The main objectives of this report are: (1) To describe the development of an X-ray photographic method for observing the frost-heaving properties of soil, especially the characteristics of the frozen fringe; (2) To describe observations of the temperature and strain field change in the frozen fringe using the procedure developed; and (3) To publish the test results as a data base that can be used in evaluating frost heave models. The method used X-ray photography with thermocouples installed inside lead marking spheres to observe soil expansion, including expansion due to in-situ freezing and expansion due to segregation freezing. The method includes an image-processing technique for analyzing the coordinates of the lead spheres on the photos, a three-dimensional analysis of the lead spheres' coordinates to compensate for the geometrical distortion caused by the use of a point X-ray source, and direct measurements of the temperature at each lead sphere using thermocouples in the spheres. Therefore, both the deformation and the temperature field in a freezing soil can be observed directly. Results on the following characteristics include: Temperature profiles in two freezing soil specimens; The expansion activity (strain and strain rate) distributions in two specimens; The apparent temperature range of the frozen fringe; The apparent thickness of the frozen fringe; and The thermal conductivity of the frozen fringe while the warmest ice lens is segregating. 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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ftdtic |
language |
English |
topic |
Soil Mechanics Snow Ice and Permafrost Photography *FROST HEAVE *X RAY PHOTOGRAPHY *PHOTOGRAPHIC ANALYSIS *SOIL MECHANICS MEASUREMENT TEMPERATURE THICKNESS EXPERIMENTAL DATA EDGES DEFORMATION SPHERES STRAIN RATE GRIDS(COORDINATES) THREE DIMENSIONAL SOILS PROFILES FREEZING ICE MATHEMATICAL ANALYSIS THERMAL CONDUCTIVITY GEOMETRY MARKERS FROZEN SOILS EXPANSION RANGE(EXTREMES) DISTORTION THERMOCOUPLES PHOTOGRAPHS SOURCES IMAGE PROCESSING MATHEMATICAL MODELS TEST AND EVALUATION DATA BASES FREEZING SOILS ICE LENSES AST42 PE62730A WU001 |
spellingShingle |
Soil Mechanics Snow Ice and Permafrost Photography *FROST HEAVE *X RAY PHOTOGRAPHY *PHOTOGRAPHIC ANALYSIS *SOIL MECHANICS MEASUREMENT TEMPERATURE THICKNESS EXPERIMENTAL DATA EDGES DEFORMATION SPHERES STRAIN RATE GRIDS(COORDINATES) THREE DIMENSIONAL SOILS PROFILES FREEZING ICE MATHEMATICAL ANALYSIS THERMAL CONDUCTIVITY GEOMETRY MARKERS FROZEN SOILS EXPANSION RANGE(EXTREMES) DISTORTION THERMOCOUPLES PHOTOGRAPHS SOURCES IMAGE PROCESSING MATHEMATICAL MODELS TEST AND EVALUATION DATA BASES FREEZING SOILS ICE LENSES AST42 PE62730A WU001 Akagawa, Satoshi X-Ray Photography Method for Experimental Studies of the Frozen Fringe Characteristics of Freezing Soil |
topic_facet |
Soil Mechanics Snow Ice and Permafrost Photography *FROST HEAVE *X RAY PHOTOGRAPHY *PHOTOGRAPHIC ANALYSIS *SOIL MECHANICS MEASUREMENT TEMPERATURE THICKNESS EXPERIMENTAL DATA EDGES DEFORMATION SPHERES STRAIN RATE GRIDS(COORDINATES) THREE DIMENSIONAL SOILS PROFILES FREEZING ICE MATHEMATICAL ANALYSIS THERMAL CONDUCTIVITY GEOMETRY MARKERS FROZEN SOILS EXPANSION RANGE(EXTREMES) DISTORTION THERMOCOUPLES PHOTOGRAPHS SOURCES IMAGE PROCESSING MATHEMATICAL MODELS TEST AND EVALUATION DATA BASES FREEZING SOILS ICE LENSES AST42 PE62730A WU001 |
description |
The main objectives of this report are: (1) To describe the development of an X-ray photographic method for observing the frost-heaving properties of soil, especially the characteristics of the frozen fringe; (2) To describe observations of the temperature and strain field change in the frozen fringe using the procedure developed; and (3) To publish the test results as a data base that can be used in evaluating frost heave models. The method used X-ray photography with thermocouples installed inside lead marking spheres to observe soil expansion, including expansion due to in-situ freezing and expansion due to segregation freezing. The method includes an image-processing technique for analyzing the coordinates of the lead spheres on the photos, a three-dimensional analysis of the lead spheres' coordinates to compensate for the geometrical distortion caused by the use of a point X-ray source, and direct measurements of the temperature at each lead sphere using thermocouples in the spheres. Therefore, both the deformation and the temperature field in a freezing soil can be observed directly. Results on the following characteristics include: Temperature profiles in two freezing soil specimens; The expansion activity (strain and strain rate) distributions in two specimens; The apparent temperature range of the frozen fringe; The apparent thickness of the frozen fringe; and The thermal conductivity of the frozen fringe while the warmest ice lens is segregating. |
author2 |
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH |
format |
Text |
author |
Akagawa, Satoshi |
author_facet |
Akagawa, Satoshi |
author_sort |
Akagawa, Satoshi |
title |
X-Ray Photography Method for Experimental Studies of the Frozen Fringe Characteristics of Freezing Soil |
title_short |
X-Ray Photography Method for Experimental Studies of the Frozen Fringe Characteristics of Freezing Soil |
title_full |
X-Ray Photography Method for Experimental Studies of the Frozen Fringe Characteristics of Freezing Soil |
title_fullStr |
X-Ray Photography Method for Experimental Studies of the Frozen Fringe Characteristics of Freezing Soil |
title_full_unstemmed |
X-Ray Photography Method for Experimental Studies of the Frozen Fringe Characteristics of Freezing Soil |
title_sort |
x-ray photography method for experimental studies of the frozen fringe characteristics of freezing soil |
publishDate |
1990 |
url |
http://www.dtic.mil/docs/citations/ADA222448 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA222448 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA222448 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766027887719219200 |