Answered: e the ultimate consolidation settlement…

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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Assume that it is necessary to compute the ultimate consolidation settlement and the 10- year settlement of the 1.5 mx1.5 m footing carrying a 400-kN load as shown in Figure Q5(a). Also assume the laboratory consolidation characteristics of a representative sample (from the mid-plane area of the clay layer) are represented by Figure Q5 (b) and the coefficient of consolidation (Cr) of the clay was determined to be 1.0 x 10-8 m/sec. (1) Estimate the immediate settlement beneath the centre of the footing. Assuming the Poisson's ratio of sand and soft clay are 0.3 and 0.45, respectively. (2) Determine the ultimate consolidate settlement beneath the centre of the footing (3) Estimate the settlement 10 years after completion of the footing

Transcribed Image Text:Soil Type Dry sand CPT q. (MPa) Es (MPa) Es = 49. Es = 49. Es = 290 2.875 Wet sand 2.675 Clay 5.0 -1.0 m Y= 16.5 kN/m3 Sandy soil -2.0 m Y sat = 17.5 kN/m3 -3.5 m Soft Y sat = 18.0 kN/m3 clay -6.0m Rock (a) Soil profile

10
Pc= 60 kPa 100 120
p' (kPa)
1.1
1.045
1.0 -
0.93
0.9
void ratio e
(b) Laboratory consolidation curve
Figure Q5

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