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  • 1
    Call number: ZSP-201-20
    In: SIPRE report, 20
    Description / Table of Contents: Work carried out at the SIPRE Test Site, Site 2, on the Greenland Ice Cap,during the summer 1954, included: (1) Excavation of trenches, a circular tunnel and a deep pit; (2) Instrumentation of excavations for pressure and deformation measurements; (3) Tests on the properties of snow from the deep pit; (4) Construction of a snow house as an experimental structure and to provide a heated shelter for an observer stationed at the site for the winter. Observations and measurements over a period of five years are expected to provide sufficient information for the establishment of satisfactory design criteria for all kinds of surface and subsurface military installations on high polar ice caps.
    Type of Medium: Series available for loan
    Pages: 31 Seiten , Illustrationen
    Series Statement: SIPRE report 20
    Language: English
    Note: Contents I. Introduction, by H. Bader II. Excavation of trenches and tunnels, by R.W. Waterhouse III. Excavation of deep pit, by J.K. Landauer IV. Trench covering, framing, and instrumentation, by R.W. Waterhouse V. The snow house, by R.W. Waterhouse VI. Load measurements in the N-S trench, by R.W. Waterhouse VII. Deformation measurements, by J.K. Landauer VIII. Distance changes on the ice cap, by B.L. Hansen and H. Bader IX. Annual accumulation, by H. Bader X. Snow density and snow load in deep pit, by J.K. Landauer XI. Air permeability of snow from deep pit, by J.A. Bender XII. Viscosity of snow from deep pit, by J.K. Landauer XIII. Crushing strength of snow from deep pit, by T.R. Butkovich XIV. Shear strength of snow from deep pit, by T.R. Butkovich XV. Tensiel strength of snow from deep pit, by T.R. Butkovich XVI. Angle of internal friction of snow from deep pit, by T.R. Butkovich XVII. Snow temperatures, by J.K. Landauer
    Location: AWI Archive
    Branch Library: AWI Library
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  • 2
    Publication Date: 1966-01-01
    Description: Penetration tests in snow show that the Rammsonde number R as a measure of force resisting penetration may be in error by a factor of two depending on the ratio of hammer to probe weight and the coefficient of restitution. It is suggested that the Hiley pile driving formula is applicable to the problem and gives more accurate values for the force of penetration. This formula accounts for the influence of different hammer weights, is in agreement with the conservation laws to the first approximation, and has been in general use for some time as one of the best simple equations for determining the dynamic resistance of piles.The Rammsonde equation is notable for its simplicity. The Hiley equation, using the same factors does not detract from this virtue. Further research is suggested to find ways of replacing the coefficient of restitution with more fundamental parameters in impact problems.
    Print ISSN: 0022-1430
    Electronic ISSN: 1727-5652
    Topics: Geography , Geosciences
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  • 3
    Publication Date: 1966-01-01
    Description: Penetration tests in snow show that the Rammsonde number R as a measure of force resisting penetration may be in error by a factor of two depending on the ratio of hammer to probe weight and the coefficient of restitution. It is suggested that the Hiley pile driving formula is applicable to the problem and gives more accurate values for the force of penetration. This formula accounts for the influence of different hammer weights, is in agreement with the conservation laws to the first approximation, and has been in general use for some time as one of the best simple equations for determining the dynamic resistance of piles. The Rammsonde equation is notable for its simplicity. The Hiley equation, using the same factors does not detract from this virtue. Further research is suggested to find ways of replacing the coefficient of restitution with more fundamental parameters in impact problems.
    Print ISSN: 0022-1430
    Electronic ISSN: 1727-5652
    Topics: Geography , Geosciences
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
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