Page 22 - Unit2.docx

a2,3 0.9 0.82*2 0.45 0.203*2 520 390

c2,4 0.9 0.82*2 2.35 2.823*2 520 390

c2,3 0.9 0.82*2 0.45 0.203*2 520 390

b2,4 0.9 0 2.35 2.823*2 520 390

b2,3 0.9 0 0.45 0.203*2 520 390

∑ 6.48 22.253

Q/n M r / ∑ r 2 zi M r / ∑ r 2 xi P i
z xi
x zi
PILE
r )/22.253 (
r )/ 6.48
k N ( 520⋅ zi 390* xi k N

a2 227 58 54 227-58-54 = 205** Minimum load 205 KN, carried by pile
a2

a2 29 54 227-29-54 = 244

a3 29 54 227+29-54 = 282

a4 58 54 227+58-54 = 222

b2 58 0 227-58-00 = 257

227-29-00 = 257

0
29
b2
© It's Engg. Life

b3 29 0 227+29-00 = 236

b4 58 0 227+58-00 = 275

c2 58 54 227+58-54 = 222

c2 29 54 227-29+54 = 252

c3 29 54 227+29+54=290

c4 58 54 227+58+54 = 329*** Maximum load 329 KN, carried by
pile c4

Example 3.2

A pile trestle shown on figure 3-3 consists of four vertical piles surmounted by a
2.2m thick pile cap. It carries a horizontal load applied to the surface of the cap
of 400kN. The only vertical load exerted on the pile group is the weight of the pile
cup. Determine the loads on the piles.