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- W117529365 abstract "Abstract : 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." @default.
- W117529365 created "2016-06-24" @default.
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- W117529365 date "1990-02-01" @default.
- W117529365 modified "2023-09-27" @default.
- W117529365 title "X-RAY PHOTOGRAPHY METHOD FOR EXPERIMENTAL STUDIES OF THE FROZEN FRINGE CHARACTERISTICS OF FREEZING SOIL" @default.
- W117529365 hasPublicationYear "1990" @default.
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