A brown silty sand fill 5 m thick was placed over a 15 m thick layer of compressible gray silty clay. Underlying the clay layer is brown sandy gravel. The soil profile is shown in Fig. Ex. 9.12a. Assume for this problem that the settlement of the fill and the sandy gravel is small compared to the
A brown silty sand fill 5 m thick was placed over a 15 m thick layer of compressible gray silty clay. Underlying the clay layer is brown sandy gravel. The soil profile is shown in Fig. Ex. 9.12a. Assume for this problem that the settlement of the fill and the sandy gravel is small compared to the
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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using the data given in the image uploaded. After 10 yr of consolidation, an additional areal fill load of 49 kpa is placed on the site. compute the amount of additional settlement and prepare a plot of the settlement.
Transcribed Image Text:Soil profile
Pressure (kPa)
50
100
150
200
Ao = pgz = 2.0 Mg/m3 x 9.81 X 5 m
Brown silty
sand (SM)
(fill)
= 98.1 kPa
98.1" kPa
-5
3.8*
101.9
GWT
11.5
109.6
19.1
117.2
Gray
silty
clay
(CL)
- 10
26.8
124.9
8:
+ Ao
34.4
132.5
42.1
140.2
- 15
A
49,7
147.8
1.52 Mg/m
57.4
155.5
65.0
163.1
* 72.7
170,8
-20
76.5*
174.6"
> Brown
if sandy
gravel
(GP)
Cincompressible
*Computed
-25
(o, + A0) 20 m " avs + (Psa " PwIgz
V.V
= 98.1 + (1.52 - 1.0)9.81 x 15 m
= 98.1 + 76.5
= 174.6 kPa
Fig. Ex. 9.12a Soil profile and effective stress versus depth.
settlement of the silty clay layer. Properties of the normally consolidated
silty clay layer are:
Initial void ratio, e, = 1.1.
Compression index, C, = 0.36.
Secondary compression index, C, = 0.06.
Saturated density, Pat = 1.52 Mg/m.
Coefficient of consolidation, c,
The density of the silty sand fill, p, is 2.0 Mg/m', and the ground
water table is at the interface of the fill and clay, at -5 m.
0.858 m/yг.
Depth (m)
Transcribed Image Text:A brown silty sand fill 5 m thick was placed over a 15 m thick layer of
compressible gray silty clay. Underlying the clay layer is brown sandy
gravel. The soil profile is shown in Fig. Ex. 9.12a. Assume for this problem
that the settlement of the fill and the sandy gravel is small compared to the
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