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Stress analysis of a proposed tunnel underr the South Pole skiway
Submitted by Armida on Mon, 02/11/2013 - 13:08
|Stress analysis of a proposed tunnel underr the South Pole skiway
|Year of Conference
|Sodhi, D. S., Rand J. H., and Tobiasson W.
|61st Annual Western Snow Conference
|Proceedings of the 61st Annual Western Snow Conference
|Western Snow Conference
|Quebec City, Quebec
|Snow loading, Strength test, Stress, Tunnels
Unlined tunnels in the snow at the South Pole Station will be used for save movement of personnel to satellite science buildings during the austral winter. The first 1.8 m (6 ft) wide, 3 m (10 ft) high tunnel will pass under the existing skiway. This study determined the depth at which that tunnel should be located so that it is safe when aircraft pass over it. Three efforts were undertaken: (a) conducting a three-dimensional, elastic stress analysis of the snow around the tunnel, (b) comparing the maximum tensile and shear stresses from that analysis with corresponding strengths published in the literature, and (c) performing two experiments at the South Pole to determine the surface pressure required to fail the snow around model tunnels. We found general agreement of theoretical and experimental results and recommended that the roof of the tunnel be located at least 6.1 m (20 ft) below the surface of the skiway.