Step No. -2 << DISPLACEMENT CALCULATION DUE TO INITIAL STRUT LOADS >>

Ground Settlement by Caspe(1966) method
(see FOUNDATION ANALYSIS AND DESIGN 4th ed. p659)

Excavation Depth (HW) = 1.00 m
Average Phi to ex. depth = 27.00 Deg
Width of Excavation (B) = 5.38 m
Hp = (0.5 B tan(45+PHI/2) = 4.39 m
Ht = (Hw+Hp) = 5.39 m
Distance of Influnce D=Ht*tan(45-PHI/2)) = 3.30 m

Volume of deflection (Vs) = -0.00089 m3
Settlement at wall Sw = 4 Vs/D = 0.00108 m = 1.08 mm

Distance 0.0*D 0.1*D 0.2*D 0.3*D 0.5*D 1.0*D
( m ) 0.0 0.3 0.7 1.0 1.7 3.3

Settlement(mm) 1.08 0.87 0.69 0.53 0.27 0.00

Note. The results shown are approximation recommended by Caspe.
Error ! Lowest Support Depth <= 0
여기에서 에러가 의미하는게 뭐죠?