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Stability study of CRREL permafrost tunnel.
Huang SL; Aughenbaugh NB; Wu M
J Geotech Eng 1986 Aug; 112(8):777-790
Underground excavated openings in permafrost can have significant ground stability problems if the thermal regime of the area is disturbed. Other factors influencing ground stability besides temperature variation include dimensions of the excavation, thickness of the overburden, and geometry of the opening. This paper summarizes the results of a research project conducted at the U.S. Army Cold Regions Research and Engineering Laboratory (CRREL) permafrost tunnel. The relationships between the ground temperature, the roof span dimensions, and the vertical convergence rate of the crrel tunnel correlate with a combined exponential and logarithmic model. The continuous deformation of the tunnel was primarily temperature dependent. In addition to the effect of temperature, the opening width also exhibited a strong influence on tunnel deformation. The span length gradually achieved a constant effect upon tunnel deformaiton as the opening width increased. The overburden thickness also exhibited an influence on convergence rate.
IH; Journal Article
Issue of Publication
Journal of Geotechnical Engineering
AK; MS; MO
University of Alaska
Page last reviewed: November 6, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division