An 18” square solid concrete pile is driven with an impact hammer to a depth of 55ft below grade into the soil conditions below. Calculate the (Qultimate) and (Qallowable) assuming a FOS of 2, assume groundwater is at the surface. Show all work use Alpha and Meyerhof methods.

An 18” square solid concrete pile is driven with an impact hammer to a depth of 55ft below grade into the soil conditions below. Calculate the (Qultimate) and (Qallowable) assuming a FOS of 2, assume groundwater is at the surface. Show all work use Alpha and Meyerhof methods.

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter18: Pile Foundation

Section: Chapter Questions

Problem 18.13P

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Pricing Excavation and Backfill

Backfill, in construction, is the activity of returning the soil and gravel that are removed during building construction or using them again to toughen and support the foundation of the building or any other structural component.

Question

5. An 18" square solid concrete pile is driven with an impact hammer to a depth of 55ft
below grade into the soil conditions below. Calculate the (Qultimate) and (Qallowable)
assuming a FOS of 2, assume groundwater is at the surface. Show all work use Alpha and
Meyerhof methods.
Oft
NC Clay
Yat = 135 pef
c= Su = 900psf
55ft
Sand
Yat = 130 pcf
Phi - 38deg
80ft

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5. An 18" square solid concrete pile is driven with an impact hammer to a depth of 55ft below grade into the soil conditions below. Calculate the (Qultimate) and (Qallowable) assuming a FOS of 2, assume groundwater is at the surface. Show all work use Alpha and Meyerhof methods. Oft NC Clay Ysat = 135 pcf c = Su = 900psf 55ft Sand Kat = 130 pcf Phi = 38deg 80ft 6. All things being equal for the above problem use the Coyle and Castello method and find (Qultimate) and (Qallowable)
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