Chapter 15, Problem 15.5QPP

A rectangular pile (0.88 x 0.68 m.) is driven in a clayey soil arrangement composed of two different layers. First layer has a height of 5 m., cohesion of 54 kPa, friction factor of 0.81. Second layer has a height of 8 m., cohesion of 72 kPa, and friction factor of 0.81. Compute the allowable load that the pile can carry if the factor of safety is 2.93. Use stored value. Asnwer in 5 decimal places.

A rectangular pile (0.88 x 0.68 m.) is driven in a clayey soil arrangement composed of two different layers. First layer has a height of 5 m., cohesion of 54 kPa, friction factor of 0.81. Second layer has a height of 8 m.., cohesion of 72 kPa, and friction factor of 0.81. Compute the allowable load that the pile can carry if the factor of safety is 2.93. Round off to two decimal places.

Determine the design capacity of the pile group shown below. The pile cap thickness is 1.5 meters, and groundwater table is located 2.8 meters below the ground surface. Piles are 350-mm in diameter and 12 meters in length. Use a critical depth equal to 18*dpile (starting from ground level), K = 3, ac (adhesion factor for clay) = 0.5, a, (wall friction angle for sand)= 25°, and FS = 3. Only consider single-pile action and neglect the capacity of the pile cap. Ground Level 1.5 m- Firm Clay c = 35 kPa Yary = 14.6 kN/m³ Yaut = 17.9 kN/m³ 3.5 m Medium Dense Sand 31° - 6.2 m Yary = 16.8 kN/m³ Yaat = 19.4 kN/m³ Layout of Pile Group Dense Sand 9 = 42° Yary = 18.2 kN/m³ Yu- 20.1 kN/m³ N - 200

Situation 5 - A rectangular pile (0.77 x 0.72 m.) is driven in a clayey soil arrangement composed of two different layers. First layer has a height of 7 m., cohesion of 53 kPa, friction factor of 0.89. Second layer has a height of 8 m., cohesion of 78 kPa, and friction factor of 0.88. (A.) Compute the skin friction resistance in kN. Round off to two decimal places. (B.) Compute the end bearing capacity in kN. Round off to two decimal places. (C.) Compute the allowable load, in kN, that the pile can carry if the factor of safety is 2.00. Round off to two decimal places.

(i) What are the components of elastic settlement of piles? Name two parameters that affect the settlement. A 300 mm diameter pile penetrates a deep deposit of soft clay 9 m deep. Compute the skin friction and point bearing capacity. The clay has an undrained unit cohesion of 60 kN/m?. Assume a (ii) constant friction coefficient of 0.75 and use a method.

A 16 in diameter, 55 ft long drilled displacement pile is to be constructed in the following soil profile. Depth (ft) Soil Description Unit Weight (lb/ft3) Undrained Shear Strength (lb/ft2) 0–10 Sandy silt 115 800 10–35 Silty clay 105 4000 35–50 Silty clay 112 1500 50–65 Clay 115 2000 The groundwater table is at a depth of 10 ft. Using a factor of safety of 3.0, determine the ASD allowable downward load capacity.

a rectangular pile (0.54 x 0.63) is driven in clayey soil arrangement composed of two different layers. First laye has a height of 5 m., cohesion of 53 kPA, friction factor of 0.83. Second Layer has a height of 5m., cohesion of 71 kPa, and friction factor of 0.83. Compute the allowable load that the pile can carry if the factor safety is 2.66

Calculate the pile's allowable bearing load using the corrected SPT values at various depths given in the figure below (factor of safety is 1.5). 10m D=1m 2m 2m 2m 2m 2m SPT1=14. SPT2=16 SPT3=18. SPT4=18 -- SPT5=20. Corrected SPT Values

A rectangular pile (0.52 x 0.82 m) is driven in a clayey soil arrangement composed of two different layers. First layer has a height of 7 m, cohesion of 55 kpa, friction factor of 0.89. Second layer has a height of 7 m, cohesion of 70 kpa, and friction factor of 0.87. Compute the allowable load that the pile can carry if the factor of safety is 2.11