Solutions Manual Principles of Foundation Engineering 9th Edition by Braja M. Das and
Nagaratnam
Solutions Manual Principles of Foundation Engineering 9th Edition by Braja M. Das and
Nagaratnam
,Solutions Manual Principles of Foundation Engineering 9th Edition by Braja M. Das and Nagaratnam
SOLUTIONS MANUAL
For
Principles of Foundation
Engineering
Ninth Edition
BRAJA M. DAS
NAGARATNAM SIVAKUGAN
Solutions Manual Principles of Foundation Engineering 9th Edition by Braja M. Das and Nagaratnam
1
,Solutions Manual Principles of Foundation Engineering 9th Edition by Braja M. Das and Nagaratnam
Contents
Chapter 2 ..............................................................................................................................1
Chapter 3 ............................................................................................................................11
Chapter 5 ............................................................................................................................23
Chapter 6 ............................................................................................................................31
Chapter 7 ............................................................................................................................49
Chapter 8 ............................................................................................................................59
Chapter 9 ............................................................................................................................69
Chapter 10 ..........................................................................................................................83
Chapter 11 ..........................................................................................................................89
Chapter 12 ..........................................................................................................................91
Chapter 13 ........................................................................................................................ 113
Chapter 14 ........................................................................................................................ 123
Chapter 15 ........................................................................................................................ 125
Chapter 16 ........................................................................................................................ 131
Chapter 17 ........................................................................................................................ 141
Chapter 18 ........................................................................................................................ 153
Chapter 19 ........................................................................................................................ 171
Solutions Manual Principles of Foundation Engineering 9th Edition by Braja M. Das and Nagaratnam
, Solutions Manual Principles of Foundation Engineering 9th Edition by Braja M. Das and Nagaratnam
Chapter 2
2.1 From Eq. (2.18),
Gs ρw 2450 2.80 1000
ρ = = = ; e = 0.0571
d 1+ e 0.925 1+ e
From Eq. (2.6),
e
Porosity, n = =
0.0571 = 0.054
1+ e 1+ 0.0571
2.2 From Eq. (2.13), the dry density
ρ 2060
ρd = = = 1786.6 kg/m3
1 + w 1 + 0.153
Gs ρw
From Eq. (2.18), ρ =
d 1+ e
Gs ρw 2.70 1000
e= −1 = − 1 = 0.511
ρd 1786.6
Once saturated, from Eq. (2.19),
(Gs + e) (2.70 + 0.511)
ρsat = ρw = 1000 = 2125.1 kg/m3
(1 + e) (1 + 0.511)
2.3 Let’s consider a 1-m2 area in plan. The initial volume of this soil is
V = 1 × 0.5 = 0.5 m3. Volume of the solids is Vs.
0.5 −Vs
e = 0.9 = ; Vs = 0.2632 m3
Vs
Ws = 0.2632 × 2.68 × 9.81 = 6.919 kN
The new volume after compaction = 1 × 0.455 = 0.455 m3
6.919
The dry unit weight, γ = = 15.21 kN/m3
d
0.455
Gsγw
From Eq. (2.12), γd =
1+ e
SOURCE: Browsegrades.net
1
Nagaratnam
Solutions Manual Principles of Foundation Engineering 9th Edition by Braja M. Das and
Nagaratnam
,Solutions Manual Principles of Foundation Engineering 9th Edition by Braja M. Das and Nagaratnam
SOLUTIONS MANUAL
For
Principles of Foundation
Engineering
Ninth Edition
BRAJA M. DAS
NAGARATNAM SIVAKUGAN
Solutions Manual Principles of Foundation Engineering 9th Edition by Braja M. Das and Nagaratnam
1
,Solutions Manual Principles of Foundation Engineering 9th Edition by Braja M. Das and Nagaratnam
Contents
Chapter 2 ..............................................................................................................................1
Chapter 3 ............................................................................................................................11
Chapter 5 ............................................................................................................................23
Chapter 6 ............................................................................................................................31
Chapter 7 ............................................................................................................................49
Chapter 8 ............................................................................................................................59
Chapter 9 ............................................................................................................................69
Chapter 10 ..........................................................................................................................83
Chapter 11 ..........................................................................................................................89
Chapter 12 ..........................................................................................................................91
Chapter 13 ........................................................................................................................ 113
Chapter 14 ........................................................................................................................ 123
Chapter 15 ........................................................................................................................ 125
Chapter 16 ........................................................................................................................ 131
Chapter 17 ........................................................................................................................ 141
Chapter 18 ........................................................................................................................ 153
Chapter 19 ........................................................................................................................ 171
Solutions Manual Principles of Foundation Engineering 9th Edition by Braja M. Das and Nagaratnam
, Solutions Manual Principles of Foundation Engineering 9th Edition by Braja M. Das and Nagaratnam
Chapter 2
2.1 From Eq. (2.18),
Gs ρw 2450 2.80 1000
ρ = = = ; e = 0.0571
d 1+ e 0.925 1+ e
From Eq. (2.6),
e
Porosity, n = =
0.0571 = 0.054
1+ e 1+ 0.0571
2.2 From Eq. (2.13), the dry density
ρ 2060
ρd = = = 1786.6 kg/m3
1 + w 1 + 0.153
Gs ρw
From Eq. (2.18), ρ =
d 1+ e
Gs ρw 2.70 1000
e= −1 = − 1 = 0.511
ρd 1786.6
Once saturated, from Eq. (2.19),
(Gs + e) (2.70 + 0.511)
ρsat = ρw = 1000 = 2125.1 kg/m3
(1 + e) (1 + 0.511)
2.3 Let’s consider a 1-m2 area in plan. The initial volume of this soil is
V = 1 × 0.5 = 0.5 m3. Volume of the solids is Vs.
0.5 −Vs
e = 0.9 = ; Vs = 0.2632 m3
Vs
Ws = 0.2632 × 2.68 × 9.81 = 6.919 kN
The new volume after compaction = 1 × 0.455 = 0.455 m3
6.919
The dry unit weight, γ = = 15.21 kN/m3
d
0.455
Gsγw
From Eq. (2.12), γd =
1+ e
SOURCE: Browsegrades.net
1
