| OCR Text |
Show Eq. ( Ill, 16) ( III ) ( VI ) ( VIII ) h* = 4.15 m v = 27.5 m/ sec H = 38.5 m p = 7350 kg/ m2 ( local determination from Section I, 2, A, d: p > 6000 kg/ m2) B. Surface Avalanche at Dalaas The fact that the railroad train struck by the avalanche was able to protect the portion of the building standing behind it proves the small flow height of the avalanche. Under the existing snow conditions ( Section I) it could only have been a surface avalanche. h = 1.6 m, Y 0 ~ ! 50 kg/ m3, longitudinal profile as in Figure 2. In the release zone + 0 = 450, in the zone of destruction typ. = 13<\ for surface avalanches p. ~ Yo/ 2000 Eq. ( Ill, a) and ( V) ( III ) ( VI ) ( VIII ) iu = 2.35 m v = 13.5 m/ sec H = 11.3 m p = 1800 kg/ m2 ( local determination from Section I, 2, B: p = 1200 to 2400 kg/ m2) ( II ): Y m a x = 250 kg/ m3 ( VI ): H' = 7.3 m ( local determination from Section I, 2, B: H' ~ 7 m) The upward force of the snow ( Figure 12) which had entered through the windows and doors of the ground floor areas acted upon a total horizontal surface of size similar to the facade area which had been struck; the average upward pressure per square meter of the facade surface struck reached according to Equation ( X), pv = p/ 2 = 900 kg/ m2 ( local observations: pv = 500 to 1000 kg/ m2). In the area of the railroad with inclined terraces, ditches, tracks clear of snow, etc., the mean coefficient of ground friction will reach approximately 51 |
