PRINCIPLES OF GEOTECH.ENGINEERING >LL+M
9th Edition
ISBN: 9781337583879
Author: Das
Publisher: CENGAGE L
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Chapter 10, Problem 10.21P
Refer to Figure 10.48. If R = 4 m and hw = height of water = 5 m, determine the vertical stress increases 2 m below the loaded area at radial distances where r = 0, 2, 4, 6, and 8 m.
Circular contact area of radius R on the ground surface
Figure 10.48
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1. Three point loads, 19000, 20000 and 18000kN, act in line 8 m, 6m apart near the surface
of a soil mass. Calculate the vertical stress at a depth of 4m vertically below the center (30000kN)
load.
19 000 KN
20 000 kN
18 000 KN
Influence factors for vertical stress due to point load
↳
riz
b
riz
1₂
0.478
0.80
0.139
0.020
0.466
0.90
0.108
0.016
0.433
1.00
0.084
0.013
4 m
0.385
1.10
0.066
0.011
0.329
1.20
0.051
0.009
0.273
1.30
0.040
0.006
0.221
1.40
0.032
0.004
0.176
1.50
0.025
0.003
8 m
6m
riz
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
1.60
1.70
1.80
1.90
2.00
2.20
2.40
2.60
3- Due to application of line loads q1 and q2, the vertical stress increase at point A is 42 lb/ft?. Determine the
magnitude of q2
q.=292 Ib/ft
92
45°
4.5 ft
3 ft
3 ft
A
%3D
Determine the average normal stress in each bar if the diameter of each bar is 20 mm. Set P = 40 kN. TAC
(TBC
AB
1.5 m
2 m
Chapter 10 Solutions
PRINCIPLES OF GEOTECH.ENGINEERING >LL+M
Ch. 10 - Prob. 10.1PCh. 10 - Prob. 10.2PCh. 10 - Prob. 10.3PCh. 10 - Prob. 10.4PCh. 10 - Prob. 10.5PCh. 10 - Prob. 10.6PCh. 10 - Point loads of magnitude 125, 250, and 500 kN act...Ch. 10 - Refer to Figure 10.41. Determine the vertical...Ch. 10 - For the same line loads given in Problem 10.8,...Ch. 10 - Refer to Figure 10.41. Given: q2 = 3800 lb/ft, x1...
Ch. 10 - Refer to Figure 10.42. Due to application of line...Ch. 10 - Refer to Figure 10.43. A strip load of q = 1450...Ch. 10 - Repeat Problem 10.12 for q = 700 kN/m2, B = 8 m,...Ch. 10 - Prob. 10.14PCh. 10 - For the embankment shown in Figure 10.45,...Ch. 10 - Refer to Figure 10.46. A flexible circular area of...Ch. 10 - Refer to Figure 10.47. A flexible rectangular area...Ch. 10 - Refer to the flexible loaded rectangular area...Ch. 10 - Prob. 10.19PCh. 10 - Prob. 10.20PCh. 10 - Refer to Figure 10.48. If R = 4 m and hw = height...Ch. 10 - Refer to Figure 10.49. For the linearly increasing...Ch. 10 - EB and FG are two planes inside a soil element...Ch. 10 - A soil element beneath a pave ment experiences...
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