PROBLEM 3: Four columns x Five rows ofgroup piles are installed into a uniform claylayer.Clay soil: c=40 kPa, Nc=7.5Piles: Diameter = 350mm, Length=35m, Pile topile spacing (center to center)=0.90m, pileedge distance (center of pile to edge of pilecap) =0.75mPile cap: Thickness=950mm, pilecover=100mm, clear cover=75mm, db=25mm.f'c=28 MPa, fy=420 MPaHint: Effective depth is found by subtractingthe pile cover, clear cover, and half of bardiameter to the thickness.a) Calculate the ultimate capacity of the pileusing single pile analysis if alpha = 0.74b) Calculate the ultimate capacity of the pileusing block action if alpha = 0.74c) Determine the group efficiency using thecalculated values above.

The question is based on the group of piles installed in the clay. The thickness of the pile cap,…

Answered: layer. Clay soil: c=40 kPa, Nc=7.5…

layer. Clay soil: c=40 kPa, Nc=7.5 Piles: Diameter = 350mm, Length=35m, Pile to pile spacing (center to center)=0.90m, 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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Concept explainers

Measuring site work, Excavation and Piling

Bid drawings typically include very little material about the precise requirements of site work operations, measuring site work and excavation work differs from measuring most other works on a construction project. The actual site work conditions are not provided and also the dimensions of the excavations are not known during the pre-construction phase. The precise measurement of the excavation and backfill of the earth material and topsoil is important for a contractor to decide upon the total cost required for the process. All the works should be carried out under OSHA (Occupational Safety and Health Administration) standards to ensure the safety of the workers.

Question

PROBLEM 3: Four columns x Five rows of
group piles are installed into a uniform clay
layer.
Clay soil: c=40 kPa, Nc=7.5
Piles: Diameter = 350mm, Length=35m, Pile to
pile spacing (center to center)=0.90m, pile
edge distance (center of pile to edge of pile
cap) =0.75m
Pile cap: Thickness=950mm, pile
cover=100mm, clear cover=75mm, db=25mm.
f'c=28 MPa, fy=420 MPa
Hint: Effective depth is found by subtracting
the pile cover, clear cover, and half of bar
diameter to the thickness.
a) Calculate the ultimate capacity of the pile
using single pile analysis if alpha = 0.74
b) Calculate the ultimate capacity of the pile
using block action if alpha = 0.74
c) Determine the group efficiency using the
calculated values above.

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