A clay layer of 6 m thickness has an existing overburden pressure of 300 kpa at the centre of the clay layer. The pressure is expected to increase by 150 kpa due to a new building. By taking cc = 0.45, w = 50% and G = 2.71, calculate the consolidation settlement.

A clay layer of 6 m thickness has an existing overburden pressure of 300 kpa at the centre of the clay layer. The pressure is expected to increase by 150 kpa due to a new building. By taking cc = 0.45, w = 50% and G = 2.71, calculate the consolidation settlement.

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter5: Soil Improvement And Ground Modification

Section: Chapter Questions

Problem 5.9P

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Concept explainers

Calculation of Settlement

The vertical displacement of the structural foundation due to the loading from the superstructure is known as settlement. It is due to the reduction of air voids present in the soil. The amount of vertical displacement depends on the bearing capacity of the soil on which the foundation is laid. The effect of the settlement depends on the magnitude of settlement, uniformity, and the structural design of the structure. The maximum allowable settlement for residential and office buildings should be less than 18 mm, for industrial buildings, it is 38 mm and for commercial buildings, it is 25 mm.

Question

Consolidation.

A clay layer of 6 m thickness has an existing overburden pressure of
300 kpa at the centre of the clay layer. The pressure is expected to
increase by 150 kpa due to a new building. By taking cc = 0.45, w =
50% and G = 2.71, calculate the consolidation settlement.

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