Answered: Dry sand y = 16.5 kN/m³ 1.5 m…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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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), i_B = i_T = 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

iT
iB
+ +
Tapered vane
vane
Rectangular
POI = 7
h = 2d

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