An 18 in diameter, 75 ft long ACIP pile is to be constructed in the following soil profile:Depth(ft)SoilDescriptionUnit Weight(lb/ft3)Undrained ShearStrength(lb/ft2)EffectiveFrictionAngle(deg)SPTN600–15Silty sand120 28 15–40Clayey silt1151500 40–60Sandy silt(nonplastic)119 25 60–70Well-gradedsand124 32 70–90Well-gradedsand127 3540The groundwater table is at a depth of 25 ft. Using a factor of safety of 3.0, determine the ASD allowable downward load capacity.

Given:- d = 225 ft FOS = 3 d =18 inch L=75 ft To find:- ASD allowable downward load capacity

Answered: An 18 in diameter, 75 ft long ACIP pile…

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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An 18 in diameter, 75 ft long ACIP pile is to be constructed in the following soil profile:

Depth (ft)	Soil Description	Unit Weight (lb/ft³)	Undrained Shear Strength (lb/ft²)	Effective Friction Angle (deg)	SPT N₆₀
0–15	Silty sand	120		28
15–40	Clayey silt	115	1500
40–60	Sandy silt (nonplastic)	119		25
60–70	Well- graded sand	124		32

70–90

Well-
graded
sand

127

The groundwater table is at a depth of 25 ft. Using a factor of safety of 3.0, determine the ASD allowable downward load capacity.

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