5.a. Why do we sometimes need pile foundations for a substructure?b. Discuss the various installations methods for piles in caving and/or squeezing soils indeep foundations.c. A concrete pile is 15m long and has 406 mm diameter circular cross section. The pileis fully embedded in sand, for which the unit weight y =18 kN/m³ and the frictionalangle o = 30°.Calculate the ultimate point load Qp.i.ii. Determine the total frictional resistance Qs.iii. Determine the total ultimate load of the pile.A concrete pile 500 mm by 500 mm square cross section is embedded in a saturatedclay. The length of the embedment is 16m. The undrained cohesion, Cu of clay is 40kN/m?, and the unit weight of the clay is 20 kN/m². Use a factor of safety of 5 todetermine the allowable load the pile can carry.d.

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a. Why do we sometimes need pile foundations for a substructure?

Structural Analysis

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ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

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Question

5.
a. Why do we sometimes need pile foundations for a substructure?
b. Discuss the various installations methods for piles in caving and/or squeezing soils in
deep foundations.
c. A concrete pile is 15m long and has 406 mm diameter circular cross section. The pile
is fully embedded in sand, for which the unit weight y =18 kN/m³ and the frictional
angle o = 30°.
Calculate the ultimate point load Qp.
i.
ii. Determine the total frictional resistance Qs.
iii. Determine the total ultimate load of the pile.
A concrete pile 500 mm by 500 mm square cross section is embedded in a saturated
clay. The length of the embedment is 16m. The undrained cohesion, Cu of clay is 40
kN/m?, and the unit weight of the clay is 20 kN/m². Use a factor of safety of 5 to
determine the allowable load the pile can carry.
d.

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