A3 x 3 (total 9 piles) group of piles are to be constructed at a site. assume that the piles are embedded in a saturated homogeneous clay having a cu = 90 kn/m2. given: diameter of piles (d) = 316 mm, center-to-center spacing of piles = 600 mm, and length of piles = 20 m. find the allowable-load carrying capacity of the pile group. use f=3.

Maximum allowable load for a group pile =4.752kN

while allowable load for a group pile = 1.584kN

Explanation:

Given

diameter of piles (D) = 316mm = 0.316m

center-to-center spacing of piles = 600 mm= 0.6m

length of piles = 20 m.

Factor of safty=3

cu = 90kN/m2

the allowable-load carrying capacity of group pile is gotten by the allowable-load carrying capacity of a single pile multiply by quantity.

therefore,

allowable-load carrying capacity of a single pile, Q = =

where,      

A= cross -sectional area of the pile= πr² = 3.142*0.158² = 0.078m²

l= length of the pile=20m

r= radius of the pile base= 0.158

Q=  = 22.25/126.6 = 0.176kN or 175.7N

allowable load for a group pile = 0.176 * 9 = 1.584kN

Maximum allowable load for a pile = Q* factor of safety = 3*1.584 =4.752kN

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles