Soil E2

Fine fraction

Coarse fraction

Part 1

Part 2

Part 3

Part 4

Grain fraction (mm)

0.06 to 0.1

0.1 to 0.8

0.8 to 1

1 to 3

Average radius (mm)

0.04

0.225

0.45

1

Radius ratio r_i/r₁

1

5.625

11.25

25

Normal stiffness

k_n

0.85k_n

0.81k_n

0.76k_n

Soil A1

Fine fraction

Coarse fraction

Grain fraction (mm)

0.06 to 0.1

0.1 to 0.2

0.2 to 0.6

Average radius (mm)

0.04

0.075

0.2

Radius ratio r_i/r₁

1

1.875

5

Normal stiffness

k_n

0.93k_n

0.85k_n