The time required for 50% consolidation of a 25-mm-thick clay layer (drained at both top and bottom) in the laboratory is 3 min 15 sec. a. How long (in days) will it take for a 2-m-thick clay layer of the same clay in the field under the same pressure increment to reach 50% consolidation? In the field, sand layers are present at the top and bottom of the clay layer. b. How long (in days) will it take in the field for 30% primary consolidation to occur? (You can use this relationship: t (alpha) U² where U is the percent of consolidation)
The time required for 50% consolidation of a 25-mm-thick clay layer (drained at both top and bottom) in the laboratory is 3 min 15 sec. a. How long (in days) will it take for a 2-m-thick clay layer of the same clay in the field under the same pressure increment to reach 50% consolidation? In the field, sand layers are present at the top and bottom of the clay layer. b. How long (in days) will it take in the field for 30% primary consolidation to occur? (You can use this relationship: t (alpha) U² where U is the percent of consolidation)
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 11.9P
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The time required for 50% consolidation of a 25-mm-thick clay layer (drained at both top and bottom) in the laboratory is 3 min 15 sec.
a. How long (in days) will it take for a 2-m-thick clay layer of the same clay in the field under the same pressure increment to reach 50% consolidation? In the field, sand layers are present at the top and bottom of the clay layer.
b. How long (in days) will it take in the field for 30% primary consolidation to occur? (You can use this relationship: t (alpha) U² where U is the percent of consolidation)
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