Answered: 1. Calculate the ultimate load carrying…

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter15: Retaining Walls, Braced Cuts, And Sheet Pile Walls

Section: Chapter Questions

Problem 15.22P

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Transcribed Image Text:1. Calculate the ultimate load carrying capacity of the pile tip driven into the soil profile shown below: G.W.T. 45' Qapp Soft Clay: Ysat 100 pcf Cu 500 psf, ou = 0° 平 12' Soil Plug Driven Steel Pipe Pile: Outside Diameter = 2' Inside Diameter = 1'11" Hollow (soil plugged) Note: Pile & soil profile are not drawn to scale Qp = ? Please perform the tip capacity calculation two ways: For the first approach, assume that the total vertical stress at the pile tip is balanced by the weight of the pile. For the second approach, assume that the total vertical stress at the pile tip is not balanced by the weight of the pile (which means you need to include the vertical total stress term). Please compare your answers from these two analyses, examine some of your intermediate-stage calculation results such as the total overburden stress at the pile tip relative to the weight of the pile, and discuss whether or not the commonly used assumption about the total vertical stress at the pile tip is a good one for this particular problem. In order to calculate the weight of the pile, please use a unit weight for steel of 490 pcf.

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