7. If a 45 cm diameter pipe pile is driven into clayey soil to a depth of 12 m. (a) what would the allowable load capacity (Q) be? The water table is 2 m below the ground surface and the soil profile consists of two clay layers (refer to the figure below). Use the ß method to calculate skin friction and the R=30° for all clay layers. (b) Explain how you selected FS value you use. 12 m 9m 2 m Y = 18.5kN/m³ = 30kN/m² Ysat = 19kN/m² G. = 30KM/m²

A group pile in clay is shown in the figure below. Determine the maximum vertical load Qg be applied if the allowable consolidation settlement of the pile group is set to be 0.17 m. Use the 2:1 stress distribution method to estimate the average effective stress in the clay layer. can Qg 3 m Sand Groundwater y = 15.72 kN/m3 table Sand 3 m Ysat = 18.55 kN/m3 2.75 m X 2.75 m Group plan Normally consolidated clay Ysat = 19.18 kN/m³ 15 m 18 m eo = 1 C. = 0,8 Normally consolidated clay Ysat = 19 kN/m3 eo = 0.25, C. =1 5 m Rock

7. If a 45 cm diameter pipe pile is driven into clayey soil to a depth of 12 m. (a) what would the allowable load capacity (Q) be? The water table is 2 m below the ground surface and the soil profile consists of two clay layers (refer to the figure below). Use the ß method to calculate skin friction and the R=30° for all clay layers. (b) Explain how you selected FS value you use. 12 m ▶ 9m 2m 45 cm Y = 18.5kN/m³ = 30kN/m² Ysat = 19kN/m³ C₂ = 30kN/m² Ysat = 20kN/m² S = 60kN/m²

Consider a 20 m long concrete pile with a cross-section of 0.407m x 0.407m fully embedded in sand. For the sand, given: unit weight, X = 18 kN/m³; and soil friction angle, += 35°. Using Meyerhof's method. Determine the ultimate point bearing Qp Consider a concrete pile in sand with a diameter equals to 0.407. The pile is 20 m long. Use K = 1.3 and '= 35, 8' = 0.8', X = 18 kN/m³. Compute the frictional resistance Q Consider the figure and the table below. Find the skin resistance Q, by the a method Depth AL Saturated clay Cab 25 kN/m² (m) (m) (kN/m²) (Table 12.11) Y=16 kN/m Groundwater 0-3 table F421 40 kN/m 7m Clay 3-10 Yeat 17 kN/m 10-20 3710 25 0.87 40 0.74 90 0.51 10m Clay 90 KN/m Y 18 kN/m Diameter = 457 mm