PRINCIPLES OF GEOTECH.ENGINEERING >LL+M
9th Edition
ISBN: 9781337583879
Author: Das
Publisher: CENGAGE L
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Chapter 6, Problem 6.6P
(a)
To determine
The maximum dry unit weight of compaction and the optimum moisture content.
(b)
To determine
The void ratio and degree saturation at the optimum moisture content.
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Consider the situation in Question 2. If all the cables are made of the same material and have a maximum tensile force of 500 lb, what is the heaviest load that can be supported by the system?
A flexible circular area is subjected to a uniformly distributed load of 148 (see the figure below). The diameter of the load area is 2 . Estimate the average stress increase () below the center of the loaded area between depths of 3 and 6 . Use the equations:
and
(Enter your answer to three significant figures.)
=
A square flexible foundation of width B applies a uniform pressure go to the underlying ground.
(a) Determine the vertical stress increase at a depth of 0.625B below the center using Aσ beneath the corner of a uniform rectangular load given by Aσ =
Variation of Influence Value I
qoI. Use the table below.
n
0.8
1.0
m 0.2 0.4 0.5
0.6
0.2 0.01790 0.03280 0.03866 0.04348 0.05042 0.05471
0.4 0.03280 0.06024 0.07111 0.08009 0.09314 0.10129
0.5 0.03866 0.07111 0.08403 0.09473 0.11035 0.12018
0.6 0.04348 0.08009 0.09473 0.10688 0.12474 0.13605
0.8 0.05042 0.09314 0.11035 0.12474 0.14607 0.15978
1.0 0.05471 0.10129 0.12018 0.13605 0.15978 0.17522
(Enter your answer to three significant figures.)
Ασ/90
=
(b) Determine the vertical stress increase at a depth of 0.625B below the center using the 2 : 1 method equation below.
90 x B x L
Aσ =
(B+ z) (L + z)
(Enter your answer to three significant figures.)
Ασ/90 =
(c) Determine the vertical stress increase at a depth of 0.625B below the center using…
Chapter 6 Solutions
PRINCIPLES OF GEOTECH.ENGINEERING >LL+M
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