Physics, 09.11.2019 07:31 lindsayb2000

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.

Answers: 3

Show answers

Answers

Answer from: fatherbamboo

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 = $\frac{A*3.619 Cu}{l/r}$ =

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= $\frac{0.078*3.619 *90}{20/0.158}$ = 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

Answer from: Quest

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.

Answer from: Quest

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

Another question on Physics

Physics, 21.06.2019 20:20

How much work would a child do while puling a 12-kg wagon a distance of 3m with a 22 n force directed 30 degrees with respect to the horizontal? (a) 82j (b) 52j (c) 109j (d) 95j

Answers: 2

Answer

Physics, 22.06.2019 00:20

Suppose that an electromagnetic wave which is linearly polarized along the x−axis is propagating in vacuum along the z−axis. the wave is incident on a conductor which is placed at z > 0 region of the space. the conductor has conductivity σ, magnetic permeability µ and electric permittivity ε. (a) find the characteristic time for the free charge density which dissipates at the conductor. (b) write the maxwell equations and derive the wave equation for a plane wave propagating in a conductor. (c) find the attenuation distance at which the incident amplitude reduces to e ^−1 of its initial value. (d) find the electric and magnetic fields inside the conductor. 8 (e) find the power loss per area of the incident electromagnetic wave at the surface of conductor.

Answers: 1

Answer

Physics, 22.06.2019 06:10

Drag each tile to the correct box. tiles bra i sequence

Answers: 2

Answer

Physics, 22.06.2019 10:00

Which fact supports the conclusion that there will be fewer farm managers in the future? a) a farmer manager’s duties vary by the type of farm. b) farm technology is replacing some administrative jobs c) farm managers often need experience but not education. d) administrative duties include budgeting and training staff.

Answers: 2

Answer

You know the right answer?

A3 x 3 (total 9 piles) group of piles are to be constructed at a site. assume that the piles are emb...

Questions