2. Calculate the allowable load carrying capacity of the pile group driven into the soil profile shown below: Qall = ? C

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2 Calculate The Allowable Load Carrying Capacity Of The Pile Group Driven Into The Soil Profile Shown Below Qall C 1 (83.96 KiB) Viewed 21 times

2. Calculate the allowable load carrying capacity of the pile group driven into the soil profile shown below: Qall = ? Concrete-Filled Steel Pipe Pile: Outside Diameter = 1' Inside Diameter = 11" (Completely Concrete Filled) (Driven w/ Cap, then concrete tremied into place) 20' G.W.T. 60' Poorly Graded Sand (SP): Ym = 115 pcf Ysat = 125 pcf c' = 0, ' = 34° 3 x 2 Pile Group: Piles spaced 3' center to center Note: Pile & soil profile are not drawn to scale Please use an Allowable Stress Design (ASD) approach for your analysis, and be sure to check against both single pile and group failure mechanisms. To make grading easier, assume that K = 1.2 x K.. Use a factor of safety of 3 for design, and please include the effect of the weight of the pile in your analysis (assume Ysteet = 490 pef and Ycone = 150 pcf). Please use the two methods we discussed in class to determine N*. For ease of grading, please carry only the theoretical Ng* forward in your calculations. Use the Converse-Labarre equation to get eta for your group efficiency. Assume that the weight of the pile cap will be included as part of the structural load. For this problem, only determine Call for a geotechnical limit state failure. (Note that in the real world you must also be sure to determine Qall for structural capacity and settlement as well, and select the one that controls).