2. A 40 cm diameter pile carries an allowable load of 200 kN with unit weight of 19 kN/m3 and cohesion of 48 kPa. determine the following: (a) Lengthofthepile. (b) Unconfined compressive strength.
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2. A 40 cm diameter pile carries an allowable load of 200 kN with unit weight of 19 kN/m3 and cohesion of 48 kPa. determine the following:
(a) Lengthofthepile.
(b) Unconfined compressive strength.
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- 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.5 A group of 9 piles of 28 cm diameter is arranged in a square configuration with a center-to-center spacing of 1.11 m. The length of the piles is 13 m. Unit cohesion of the clay is 94 kPa. Determine the ultimate group capacity of the pile group based on block failure. Assume adhesion factor of 0.72. Round off to two decimal places.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. Compute the allowable load, in kN, that the pile can carry if the factor of safety is 2.00. Compute the skin friction resistance in kN. Compute the end bearing capacity in kN. Round off to two 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. Use stored value. Asnwer in 5 decimal places.A 25 m deep bored pile has a shaft of 1 m diameter and enlarged base of 2.5 m diameter in the lower 1.5 m depth. The undrained cohesion of the soil varies from 100 kN/m2 at the top to 150 kN/m2 at the base. Assume that there is no adhesion in enlarged base and one-third depth of pile above the enlargement. What is the safe load on the pile? [Take FOS = 2.5 and a = 0.45]Consider a 500 mm diameter pile having a length of 18 m in a clay. Given: γ = 20.0 kN/m3 and cu = 60 kN/m2. Determine the maximum allowable load (Qall) with FS = 3. Use the α method and Table 12.11 for determining the skin friction and Eq. (12.20) for determining the point load. Allow a factor of safety of 3. What percentage of the ultimate load is being carried by the pile shaft? Is it a friction pile?
- (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 rectangular pile (0.91 x 0.54 m.) is driven in a clayey soil arrangement composed of two different layers. First layer has a height of 5 m., cohesion of 51 kPa, friction factor of 0.82. Second layer has a height of 5 m., cohesion of 71 kPa, and friction factor of 0.84. Compute the allowable load that the pile can carry if the factor of safety is 2.97Determine the ultimate bearing load of the pile using Tomlinson for a 12.5-m closed-end steel pipe pile is driven into a uniform undrained clay. Pile diameter = 0.5 m. Unit weight of clay is 18.5 kN/m3, and undrained cohesion of 95 kN/m2. The groundwater table is at the ground surface and the clay layer extends to a great depth.
- A circular pile having a diameter of 0.33 m is 14.21 m long which is embedded in a layer of dense compacted sand having the given properties. Soil properties: Lateral pressure factor, K = 3.53 Nq = 99 Specific gravity, Gs= 2.61 Void ratio, e =1.21 Saturation above the GWT = 0.41 Ground water table (GWT) is located 3.58 m below the ground. Use unit weight of water = 9.81 kN/m3 Coefficient of friction = 0.41 Factor of safety = 3.98 Calculate the allowable capacity of the pile in kN.A group of 9 piles of 31 cm diameter is arranged in a square configuration with a center-to-center spacing of 1.85 m. The length of the piles is 14 m. Unit cohesion of the clay is 73 kPa. Determine the ultimate group capacity of the pile group based on block failure. Assume adhesion factor of 0.79.A group pile has a section of 4 x 4 with each having a diameter of 305 mm are embedded in clay. The length of the piles are 12 m and the spacing between the piles (d) are 1.0 m. The recorded soil profile for the ground is shown in Table 1. Propose the allowable load bearing capacity of the pile with a factor of safety of (FS) of 3. (b) TABLE 1 : Soil type and soil parameter Depth Soil parameter 0.0 m to 2.0 m | Unit weight = 17.5 kN/m³ Cohesion = 20 kN/m? 2.0 m to 8.0 m Unit weight = 18.5 kN/m³ Cohesion = 60 kN/m? 8.0 m to 15.0 m Unit weight = 20.1 kN/m³ Cohesion = 80 kN/m?