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.

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.

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.

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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

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

The soil profile and soil properties at a site are shown in the table below. A group of 12 concrete piles in a 3 x 4 matrix and of length 12 m is used to support a load. The pile diameter is 0.45 m and pile spacing is 1.5 m.Determine the allowable load capacity for a factor of safety of 2. Calculate the total settlement (elastic and consolidation) under the allowable load. Assume Ep = 20 x 106 kPa.