Problem 4: A building is to be constructed on a 6 m thick stratum of the clay for which consolidation data are given in Problem 3. (a) The average in-situ void ratio of this clay stratum is 0.91 and initial effective vertical stress on this clay stratum is 200 kPa. Given that the average stress in the clay after construction of the building is 300 kPa, estimate the decrease in the thickness of the clay stratum caused by full consolidation under the building load. (b) If the initial effective stress on this clay stratum were 50 kPa and the average stress in the clay after construction of the building is still 300 kPa, what would the decrease in the thickness of the clay stratum be? The initial void ratio is also assumed to be 0.91.

Principles of Foundation Engineering (MindTap Course List)
8th Edition
ISBN:9781305081550
Author:Braja M. Das
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Chapter2: Geotechnical Properties Of Soil
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Problem 4: A building is to be constructed on a 6 m thick stratum of the clay for which
consolidation data are given in Problem 3.
(a) The average in-situ void ratio of this clay stratum is 0.91 and initial effective vertical
stress on this clay stratum is 200 kPa. Given that the average stress in the clay after
construction of the building is 300 kPa, estimate the decrease in the thickness of the clay
stratum caused by full consolidation under the building load.
(b) If the initial effective stress on this clay stratum were 50 kPa and the average stress in the
clay after construction of the building is still 300 kPa, what would the decrease in the
thickness of the clay stratum be? The initial void ratio is also assumed to be 0.91.
Transcribed Image Text:Problem 4: A building is to be constructed on a 6 m thick stratum of the clay for which consolidation data are given in Problem 3. (a) The average in-situ void ratio of this clay stratum is 0.91 and initial effective vertical stress on this clay stratum is 200 kPa. Given that the average stress in the clay after construction of the building is 300 kPa, estimate the decrease in the thickness of the clay stratum caused by full consolidation under the building load. (b) If the initial effective stress on this clay stratum were 50 kPa and the average stress in the clay after construction of the building is still 300 kPa, what would the decrease in the thickness of the clay stratum be? The initial void ratio is also assumed to be 0.91.
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