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Posted: **Thu Jul 14, 2022 3:32 pm**

: I Explain In Detail With The Aid Of Sketches On What Condition Does Pile Foundations Need To Be Used Ii A 12 M Pres 1 (62.64 KiB) Viewed 36 times

: I Explain In Detail With The Aid Of Sketches On What Condition Does Pile Foundations Need To Be Used Ii A 12 M Pres 2 (26.58 KiB) Viewed 36 times

(i) Explain in detail with the aid of sketches on what condition does pile foundations need to be used. (ii) A 12 m prestressed concrete pile 450 mm square is installed in a clay with water table at 5 m depth as shown in Figure Q5(b). The upper clay layer is 5 m thick, with a unit weight (γ) of 17.4kN/m3. The lower clay layer has a unit weight (γ) of 18.1kN/m3. Determine the allowable pile capacity (Qall ) with factor of safety of 2 by using the simplest method.
FIGURE Q5 (b) : Undrained shear strength