A capped pile group consisting a rectangular grid of 7by 3 spanning a total length of, 7.1 m inlength. Piles are of size 400 mm diameter andspaced at 1.8 m interval. The soil profile at thesite consists of 2.5 m of sandfollowed by clay soil below. DriveMethod construction method would be used. Field andlaboratory data on the soil profile indicates top layer shearstrength of N = 25. Average and strength forbottom layer are Cu = 265 kPa and Cu = 290 kPa.Adhesion factor between soil and pile is 0.9.Would you recommend using the piles as a group or singles?
Part A: Show your working for the following
Pile Group Design
- Tip of base Area Ab (m2)=
- Base Perimeter P (m) =
- Ultimate bearing capacity qf =
- Tipt resistance (kN) =
- Layer 1 Shaft Resistance (kN) =
- Layer 2 Shaft Resistance (kN) =
- Ultimate Load Qf (kN) =
Part B: Show your working forthe following
Single Pile Design
- Ultimate bearing capacity qf (kPa) =
- Tipt resistance (kN) =
- Layer 1 Shaft resistance (kN) =
- Layer 2 Shaft resistance (kN) =
- Ultimate Load Qf (kN) =
- Pile group efficiency (%) =
- Spacing criteria satisfied? (Yes/No)
- Use Piles as (Single/Group) =
