Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 17, Problem 17.2P
A 3 m × 4 m footing, founded at 2 m depth in a clay, applies a net pressure of 200 kN/m2. The bed rock lies 10 m below the footing. The modulus of elasticity of the clay is 30 MN/m2. Using Janbu’s generalized relationship [Eq. (17.1)], assuming undrained conditions and flexible footing carrying uniform pressure, estimate the expected settlement.
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A 1.5 m square footing carries a column with a service load of 105 kN. It is founded at a depthof 2 m on a medium stiff clay with an undrained shear strength of 42 kPa, an overconsolidationratio of 4, and a plasticity index of 35. The clay layer is 5 m thick and overlies a very stiff shale.Estimate the undrained settlement of the footing using the generalized elastic method withChristian and Carrier’s (1978) influence factors.
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A bed of sand 12 m thick is underlain by a compressible stratum of normally loaded clay, 6 m thick. The water table is at a depth of 5 m below the ground level. The bulk densities of sand above and below the water table are 17.5 kN/m3 and 20.5 kN/m3 respectively. The clay has a natural water content of 40% and LL of 45%. G = 2.75. Estimate the probable final settlement if the average increment in pressure due to a footing is 100 kN/m2.
a.18.54
b.16.74
c.13.67
d.9.45
Chapter 17 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
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