A clay specimen, 15 mm thick, has been tested in an oedometer apparatus with two-way drainage, and it is observed that 50% of the consolidation settlement occurs in 1 hour. A layer of the same clay is observed to settle 10 mm in 10 years, the total settlement of the layer is 35 mm. Determine the thickness of the clay layer if it drains only from its upper surface.

A clay specimen, 15 mm thick, has been tested in an oedometer apparatus with two-way drainage, and it is observed that 50% of the consolidation settlement occurs in 1 hour. A layer of the same clay is observed to settle 10 mm in 10 years, the total settlement of the layer is 35 mm. Determine the thickness of the clay layer if it drains only from its upper surface.

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 11.3P

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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

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A clay specimen, 15 mm thick, has been tested in an oedometer apparatus with
two-way drainage, and it is observed that 50% of the consolidation settlement
occurs in 1 hour. A layer of the same clay is observed to settle 10 mm in 10
years, the total settlement of the layer is 35 mm. Determine the thickness of the
clay layer if it drains only from its upper surface.

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