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SOLUTIONS MANUAL
For Principles of Geotechnical Engineering Ninth Edition
BRAJA M. DAS
KHALED SOBHAN
(Solutions Manual, All Chapters. 100% Original Verified, A+ Grade) 1 / 4
Contents Chapter 2 ..........................................
................................................................................... 1
Chapter 3 ........................................................................................................................... 15 Chapter 4 ........................................................................................................................... 27 Chapter 5 ........................................................................................................................... 33 Chapter 6 ........................................................................................................................... 43 Chapter 7 ........................................................................................................................... 53 Chapter 8 ........................................................................................................................... 63 Chapter 9 ........................................................................................................................... 71 Chapter 10 ......................................................................................................................... 81 Chapter 11 ......................................................................................................................... 97 Chapter 12 ....................................................................................................................... 113 Chapter 13 ....................................................................................................................... 123 Chapter 14 ....................................................................................................................... 135 Chapter 15 ....................................................................................................................... 143 Chapter 16 ....................................................................................................................... 159 Chapter 17 ....................................................................................................................... 175 2 / 4
1 © 2018 Cengage Learning®. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part.Chapter 2
2.1
4.36===
11.0 48.0 10 60D D C u;
1.18===
)11.0)(48.0(
25.0 ))(( 2 1060 2 30 DD D C c
Since C u > 4 and C c is between 1 and 3, the soil is well graded.
2.2
6.11===
18.0 1.1 10 60D D C u;
0.73≈===0.727
)18.0)(1.1(
41.0 ))(( 2 1060 2 30 DD D C c
Although C u > 6, C c is not between 1 and 3. The soil is poorly graded.
2.3 The D 10, D30, and D 60 for soils A, B, and C are obtained from the grain(size distribution curves.
Soil A:
; 2.0 5.3 10 60
17.5===
D D C u
5.43===
)2.0)(5.3(
95.1 ))(( 2 1060 2 30 DD D C c
Although C u > 6, C c is not between 1 and 3. The sand is poorly graded. 3 / 4
2 © 2018 Cengage Learning®. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part.
Soil B: ;
17.0 5.1 10 60
8.82===
D D C u
2.2===
)17.0)(5.1(
75.0 ))(( 2 1060 2 30 DD D C c
C u > 6 and C c is between 1 and 3. The sand is well graded.
Soil C:
; 032.0 55.0 10 60
17.2===
D D C u
2.75===
)032.0)(55.0(
22.0 ))(( 2 1060 2 30 DD D C c
C u > 6 and C c is between 1 and 3. The sand is well graded.
2.4 a.Sieve No.Mass of soil retained on each sieve (g) Percent retained on each sieve Percent finer 4 10 20 40 60 100 200 Pan 0.0 18.5 53.2 90.5 81.8 92.2 58.5 26.5 0.0 4.4 12.6 21.5 19.4 21.9 13.9 6.3 100.0 95.6 83.0 61.5 42.1 20.2 6.3
∑ 421.2 g
The grain(size distribution is shown in the figure.
- D
- / 4
60 = 0.4 mm; D30 = 0.2 mm; D10 = 0.095 mm
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