Dry sand y = 16.5 kN/m³ 1.5 m Groundwater table Sand 1.5 m Ysat = 19 kN/m3 N60 :1.5 m Clay Ysat = 16.8 kN/m3 1.5 m * A•8 1.5 m 1.5 m 10 Sand Figure P3.2 iT iB + + Tapered vane vane Rectangular POI = 7 h = 2d
Dry sand y = 16.5 kN/m³ 1.5 m Groundwater table Sand 1.5 m Ysat = 19 kN/m3 N60 :1.5 m Clay Ysat = 16.8 kN/m3 1.5 m * A•8 1.5 m 1.5 m 10 Sand Figure P3.2 iT iB + + Tapered vane vane Rectangular POI = 7 h = 2d
Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN:9781305635180
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Braja M. Das, Nagaratnam Sivakugan
Chapter7: Seepage
Section: Chapter Questions
Problem 7.7CTP
Question
Refer to Figure P3.2. Vane shear tests were conducted in the clay layer. The vane (tapered) dimensions were 63.5 mm (d) x 127 mm (h), iB = iT = 458 (see Figure 3.23). For the test at A, the torque required to cause failure was 51 N ? m. For the clay, given: liquid limit = 46 and plastic limit = 21. Estimate the undrained cohesion of the clay for use in the design by using Bjerrum’s l relationship [Eq. (3.40a)].
![Dry sand
y = 16.5 kN/m³
1.5 m
Groundwater
table
Sand
1.5 m
Ysat
= 19 kN/m3
N60
:1.5 m
Clay
Ysat = 16.8 kN/m3
1.5 m
* A•8
1.5 m
1.5 m
10
Sand
Figure P3.2](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F71c927ea-e574-4cab-83ed-fe543f0ac29d%2F040fc9c5-c691-4591-b0a1-a499a1d2a03c%2Fdun0wa_processed.png&w=3840&q=75)
Transcribed Image Text:Dry sand
y = 16.5 kN/m³
1.5 m
Groundwater
table
Sand
1.5 m
Ysat
= 19 kN/m3
N60
:1.5 m
Clay
Ysat = 16.8 kN/m3
1.5 m
* A•8
1.5 m
1.5 m
10
Sand
Figure P3.2
![iT
iB
+ +
Tapered vane
vane
Rectangular
POI = 7
h = 2d](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F71c927ea-e574-4cab-83ed-fe543f0ac29d%2F040fc9c5-c691-4591-b0a1-a499a1d2a03c%2Fyl2ec7d_processed.png&w=3840&q=75)
Transcribed Image Text:iT
iB
+ +
Tapered vane
vane
Rectangular
POI = 7
h = 2d
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