The time to reach 60% consolidation is 35 seconds for a sample of 15 m thick tested in a laboratory under double drainage conditions. How long will the corresponding layer in nature require to reach the same degree of consolidation if it is 4.5 m thick and drained on one side only?

The time to reach 60% consolidation is 35 seconds for a sample of 15 m thick tested in a laboratory under double drainage conditions. How long will the corresponding layer in nature require to reach the same degree of consolidation if it is 4.5 m thick and drained on one side only?

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter11: Compressibility Of Soil

Section: Chapter Questions

Problem 11.12P

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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

The time to reach 60% consolidation is 35 seconds for a sample of
15 m thick tested in a laboratory under double drainage conditions.
How long will the corresponding layer in nature require to reach
the same degree of consolidation if it is 4.5 m thick and drained on
one side only?

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