| OCR Text |
Show The difficulty of this method is that it requires a measurement of the slab length, which is practically impossible to obtain before the slab releases, and that it does not account for the wide variation in the mechanical properties of the same types of snow ( Shcherbakov 1962). According to the results of Saatchan, the critical thickness of the freshly fallen snow may vary between 0.5 and 8 meters - this cannot be reliable. G. K. Sulakvelidze ( 1955) assuming snow to be a rigid and elastic substance, arrived at the following formula for the equilibrium of old compressed snow HK = CsTl K UTein* - $ VTu** - c, T- zcxl ( 2) where T and j( are geometrical dimensions of the snow slab. f is the coefficient of internal friction. C| , C- j_ , and C3 are components of bonding strength. For freshly precipitated dry snow, D. N. Gongadze ( 1954, 1955) proposed equilibrium formulae for two forms of topography: " ledge terrain" and " inflected terrain" ( see Translator's Diag.). TRANSLATOR'S DIAGRAMS FOR GONGADZE'S FORMULAE ( Reference: Gongadze 1954) |
