Following is the variation of N60 with depth in a granular soil deposit. A concrete pile 9 m long (460 mm x 460 mm in cross section) is driven into the sand and fully embedded in the sand. Estimate the allowable load-carrying capacity of the pile (Qall). Use FS as 4 and Briaud et al. equation 9.5 Following is the variation of Ngo with depth in a granular soil deposit. A concretepile 9 m long (460 mm × 460 mm in cross section) is driven into the sand and fullyembedded in the sand.Depth (m)Ngo1.543.074.596.0107.5169.02010.52111.02312.52014.021 Y = 15.7 kN/mo' = 32°3 mc' = 0Groundwater"fableYat = 18.2 kN/m6' = 32°c' = 03 m= 19.2 kN/mYsatd' = 40°15 mc' = 0381 mmFigure P9.4Solve Problem 9.5 using the equation of Briaud et al. [Eqs. (9.38) and (9.47)].Briaud et al. (1985) suggested the following correlation for q, in granular soil withthe standard penetration resistance N60-4, = 19.7p,(Ng)0.36(9.38)Briaud et al. (1985) suggested thatfav - 0.224p.(N)0.29(9.47)

The influence length of the pile is 10D above and 5D below the pile tip. The upper limit of the…

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Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Following is the variation of N60 with depth in a granular soil deposit. A concrete pile 9 m long (460 mm x 460 mm in cross section) is driven into the sand and fully embedded in the sand.

Estimate the allowable load-carrying capacity of the pile (Qall). Use FS as 4 and Briaud et al. equation

9.5 Following is the variation of Ngo with depth in a granular soil deposit. A concrete
pile 9 m long (460 mm × 460 mm in cross section) is driven into the sand and fully
embedded in the sand.
Depth (m)
Ngo
1.5
4
3.0
7
4.5
9
6.0
10
7.5
16
9.0
20
10.5
21
11.0
23
12.5
20
14.0
21

Y = 15.7 kN/m
o' = 32°
3 m
c' = 0
Groundwater
"fable
Yat = 18.2 kN/m
6' = 32°
c' = 0
3 m
= 19.2 kN/m
Ysat
d' = 40°
15 m
c' = 0
381 mm
Figure P9.4
Solve Problem 9.5 using the equation of Briaud et al. [Eqs. (9.38) and (9.47)].
Briaud et al. (1985) suggested the following correlation for q, in granular soil with
the standard penetration resistance N60-
4, = 19.7p,(Ng)0.36
(9.38)
Briaud et al. (1985) suggested that
fav - 0.224p.(N)0.29
(9.47)

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