A soft to very soft silty clay layer 3 m thick exists between a layer of permeable clayey silty sand at top and a nearlyimpermeable layer of stiff silty clay at bottom. Oedometer tests were carried out on a sample of the soft clay 19mmthick. From the plot of ΔH versus log time, the value of time t100 (the time at 100% primary consolidation) was100 min. From the graph of e versus log σ' the compression index Cc was 0.32 and the void ratio ep at the end of theprimary consolidation was 0.72. Estimate the secondary compression of the silty clay layer that would occur fromtime of completion of the primary consolidation to 30 years of the load application in the field.
A soft to very soft silty clay layer 3 m thick exists between a layer of permeable clayey silty sand at top and a nearlyimpermeable layer of stiff silty clay at bottom. Oedometer tests were carried out on a sample of the soft clay 19mmthick. From the plot of ΔH versus log time, the value of time t100 (the time at 100% primary consolidation) was100 min. From the graph of e versus log σ' the compression index Cc was 0.32 and the void ratio ep at the end of theprimary consolidation was 0.72. Estimate the secondary compression of the silty clay layer that would occur fromtime of completion of the primary consolidation to 30 years of the load application in the field.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A soft to very soft silty clay layer 3 m thick exists between a layer of permeable clayey silty sand at top and a nearly
impermeable layer of stiff silty clay at bottom. Oedometer tests were carried out on a sample of the soft clay 19mm
thick. From the plot of ΔH versus log time, the value of time t100 (the time at 100% primary consolidation) was
100 min. From the graph of e versus log σ' the compression index Cc was 0.32 and the void ratio ep at the end of the
primary consolidation was 0.72. Estimate the secondary compression of the silty clay layer that would occur from
time of completion of the primary consolidation to 30 years of the load application in the field.
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