Determine the maximum load that can be allowed on the 450 mm diameter pile shown in Figure 18.36, with a safety factor of 3. Use the a method for computing the shaft friction. FIG. 18.36

Redo Problem 18.10 using the method for estimating the skin resistance. 18.10 A concrete pile 15 m long with a cross section of 380 mm 380 mm is fully embedded in a saturated clay layer. For the clay, sat = 18 kN/m3, = 0, and cu = 80 kN/m2. Assume that the water table lies below the tip of the pile. Determine the allowable load that the pile can carry (FS = 3). Use the a method to estimate the skin resistance.

Determine the maximum load that can be allowed on a 450 mm diameter driven pile shown in Figure P12.6, allowing a factor of safety of 3. Use K = 1.5 Ko and = 0.65 in computing the shaft load. Use Meyerhofs method for computing the point load.

A 500 mm diameter and 20 m long concrete pile is driven into a sand where = 18.5 kN/m3 and = 32. Assuming = 0.7 and K = 1.5 Ko, determine the load carrying capacity of the pile with a factor of safety of 3.

Redo Problem 12.30 assuming that the water table coincides with the top of the fill and that sat(fill) = 19.8 kN/m3. If the other quantities remain the same, what would be the downward drag force on the pile? Assume ' = 0.5fill. 12.30 Figure 12.49a shows a pile. Let L = 15 m, D (pile diameter) 305 mm, Hf = 3 m, fill = 17.5 kN/m3, and fill = 25°. Determine the total downward drag force on the pile. Assume that the fill is located above the water table and that = 0.5fill.

4. The following data was obtained in a vertical pile load test on 300 mm pile diameter pile. Determine the allowable load as per IS 2911part iV(1979) Load (kN) Settlement (mm) 50 2.5 100 5 200 10 300 17 400 28 500 45 600 70

Compute the compressive force at the most stressed pile for each pile cap given in the table below. All column loads are unfactored and acting at the pile group centroid unless noted otherwise. My LL My (kN*m) y Pile Cap DL (kN)* LL(kN) LL Mx (kN*m) PC-1 1800 300 400 350 PC-2 1800 300 400 350 Mx *Pile cap weight is not included in the DL Notes: Pile diameter=600mm Use a pile cap thickness of 450mm for all cases with a conc unit wt of 23.5kN/m? PC-1 РС-2 3600 3600 1800 1800 1200 000 0081 009S

Determine the allowable load carrying capacity of the pile shown below. The average unit skin resistance is 1.2kN/m2, and the unit point resistance is 30kN/m2. Use FS=3.0

Q3- regarding the group pile shown in figure Q3, the piles having a diameter of 457 mm, located at (4) m center to center and embedded to depth of 16 m in sandy soil. Determine the group pile efficiency if the soil unit weight is 17.9 kN/m3 and angle of internal friction is 32o.