Surcharge per unit area Surcharge per unit area Ao'p, + Aon Time -Time te (a) (b) Figure 16.22 Nature of application of surcharge dp- Smeared zone Clay He Sand drain Fre- Figure 16.21 Schematic diagram of a sand drain

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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The diagram of a sand drain is shown in Figures 16.21 and 16.22. Given: rw = 0.25 m, rs = 0.35 m, de = 4.5 m, Cv = Cvr = 0.3 m2/month, kh/ks = 2, and Hc = 9 m.
Determine:
a. The degree of consolidation for the clay layer caused only by the sand drains after six months of surcharge application
b. The degree of consolidation for the clay layer that is caused by the combination of vertical drainage (drained on top and bottom) and radial drainage after six months of the application of surcharge. Assume that the surcharge is applied instantaneously.

Surcharge
per unit area
Surcharge
per unit area
Ao'p, + Aon
Time
-Time
te
(a)
(b)
Figure 16.22 Nature of application of surcharge
Transcribed Image Text:Surcharge per unit area Surcharge per unit area Ao'p, + Aon Time -Time te (a) (b) Figure 16.22 Nature of application of surcharge
dp-
Smeared
zone
Clay
He
Sand
drain
Fre-
Figure 16.21 Schematic diagram of a sand drain
Transcribed Image Text:dp- Smeared zone Clay He Sand drain Fre- Figure 16.21 Schematic diagram of a sand drain
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