Page 37 - Unit2.docx


P 2,2,3 = 83.3- (250/2.94) 0.7 = 47.6 kN


P 4,5,6 = 83.3 + (250/2.94) 0.7 = 229 kN

After installation

Displacement of piles in the X-X direction measured, left edge of pile cap as
reference point (see figure 3.27)

Figure 3-27 piles after installation

© It's Engg. Life

∴ The new neutral axis (N A) for the pile group:

 
(0.5+0.6+0.4+2.0+2.2+2.7) 2 = 6 e ⇒ e = 2.22
m The new position of Q = 0.29 m


∴ M = 500 (0.29) = 245 kNm
Measured perpendicular to the new N.A, pile distance, r i , of each pile:

r i2 = 2.22-0.5 = 0.72

r i2 = 2.22-2.0 = -0.79

r i3 = 2.22-0.6 = 0.62

r i4 = 2.22-2.2 = -0.88

r i5 = 2.22-0.4 = 0.82

r i6 = 2.22-2.7 = -0.49

2
2
2
2
2
2
2
∴ ∑ r xi = 0.72 + 0.79 + 0.62 + 0.88 + 0.82 + 0.49 = 3.2 m