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Reduction Coefficient of Passive Earth Pressure

Reduction coefficient ψ for |δ| < φ

φ [°]

ψ for |δ| < φ

5

1.0

0.8

0.6

0.4

0.2

0.0

10

1.00

0.989

0.962

0.929

0.898

0.864

15

1.00

0.979

0.934

0.881

0.830

0.775

20

1.00

0.968

0.901

0.824

0.752

0.678

25

1.00

0.954

0.860

0.759

0.666

0.574

30

1.00

0.937

0.811

0.686

0.574

0.467

35

1.00

0.916

0.752

0.603

0.475

0.362

40

1.00

0.886

0.682

0.512

0.375

0.262

45

1.00

0.848

0.600

0.414

0.276

0.174