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Geoenvironmental Disasters

Table 2 Geotechnical parameters of the pyroclastic fall deposits in the study area

From: Three-dimensional seismic slope stability assessment with the application of Scoops3D and GIS: a case study in Atsuma, Hokkaido

Soil layer

Soil symbol

Îłt (kN/m3)

Îłsat (kN/m3)

w (%)

Sr

(%)

e

c/c′

(kPa)

φ/φ′

(°)

Sampling depth (m)

1

Ta-a, b

13.2

17.2

20

36

1.5

40

20

unknown

2

Ta-c

14.7

17.2

25

46

1.5

40

20

unknown

3

Ta-d

12.3

13.0

138

91

4.0

40

20

1.7

4

En-a

12.4

14.7

65

67

2.8

74

27

2.2–3.0

5

Spfa-1

9.7

12.9

77

57

3.1

95

32

6.5

  1. γt Total unit weight, γsat Saturated unit weight, w Water content, Sr Degree of saturation, e Void ratio, c/c′ (effective) cohesion, φ/φ′ (effective) friction angle
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