9.3 Terzaghi's consolidation theory assumes (1) specimen is fully saturated, (2) water and solid components are incompressible, (3) Darcy's law is strictly applied, and (4) the flow of water is one dimensional. What will be the most critical shortcomings of these assumptions when the theory is applied to real field conditions? 9.4 A clay specimen was tested in a laboratory consolidation device, which was 12.7 mm (¹/2 in.) thick and the top and the bottom boundaries were drained. A 50% consolidation time on the specimen was obtained as 28.4 minutes. Determine the following: (a) Time for 50% consolidation in the field with this soil with a 2.5 m thickness where only the top layer is drained (b) Time for 90% consolidation in the field with this soil with a 2.5 m thickness where only the top layer is drained (c) For the same field condition above, at the end of 1 year after the placement of load, how much primary consolidation settlement occurs relative to its final amount of the settlement? (d) The same question as in (c), but at the end of 5 years 9.5 A clay specimen was tested in a laboratory consolidation device, which was 25.4 mm (1 in.) thick and only the top boundary was drained. 200 Soil Mechanics Fundamentals and Applications There was 90% consolidation time on the specimen obtained as 2.2 hours. Determine the following: (a) Time for 50% consolidation in the field with this soil with 9.6 m thickness where both top and bottom layers are drained (b) Time for 90% consolidation in the field with this soil with 9.6 m thickness where both top and bottom layers are drained (c) For the same field condition above, at the end of 1 year after the
9.3 Terzaghi's consolidation theory assumes (1) specimen is fully saturated, (2) water and solid components are incompressible, (3) Darcy's law is strictly applied, and (4) the flow of water is one dimensional. What will be the most critical shortcomings of these assumptions when the theory is applied to real field conditions? 9.4 A clay specimen was tested in a laboratory consolidation device, which was 12.7 mm (¹/2 in.) thick and the top and the bottom boundaries were drained. A 50% consolidation time on the specimen was obtained as 28.4 minutes. Determine the following: (a) Time for 50% consolidation in the field with this soil with a 2.5 m thickness where only the top layer is drained (b) Time for 90% consolidation in the field with this soil with a 2.5 m thickness where only the top layer is drained (c) For the same field condition above, at the end of 1 year after the placement of load, how much primary consolidation settlement occurs relative to its final amount of the settlement? (d) The same question as in (c), but at the end of 5 years 9.5 A clay specimen was tested in a laboratory consolidation device, which was 25.4 mm (1 in.) thick and only the top boundary was drained. 200 Soil Mechanics Fundamentals and Applications There was 90% consolidation time on the specimen obtained as 2.2 hours. Determine the following: (a) Time for 50% consolidation in the field with this soil with 9.6 m thickness where both top and bottom layers are drained (b) Time for 90% consolidation in the field with this soil with 9.6 m thickness where both top and bottom layers are drained (c) For the same field condition above, at the end of 1 year after the
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9.3
Terzaghi's consolidation theory assumes (1) specimen is fully saturated,
(2) water and solid components are incompressible, (3) Darcy's law is
strictly applied, and (4) the flow of water is one dimensional. What will
be the most critical shortcomings of these assumptions when the theory
is applied to real field conditions?
9.4
A clay specimen was tested in a laboratory consolidation device, which
was 12.7 mm (1/2 in.) thick and the top and the bottom boundaries were
drained. A 50% consolidation time on the specimen was obtained as
28.4 minutes. Determine the following:
(a) Time for 50% consolidation in the field with this soil with a 2.5 m
thickness where only the top layer is drained
(b)
Time for 90% consolidation in the field with this soil with a 2.5 m
thickness where only the top layer is drained
(c)
For the same field condition above, at the end of 1 year after the
placement of load, how much primary consolidation settlement
occurs relative to its final amount of the settlement?
(d) The same question as in (c), but at the end of 5 years
9.5
A clay specimen was tested in a laboratory consolidation device, which
was 25.4 mm (1 in.) thick and only the top boundary was drained.
Soil Mechanics Fundamentals and Applications
There was 90% consolidation time on the specimen obtained as
2.2 hours. Determine the following:
(a) Time for 50% consolidation in the field with this soil with 9.6 m
thickness where both top and bottom layers are drained
(b)
Time for 90% consolidation in the field with this soil with 9.6 m
thickness where both top and bottom layers are drained
(c) For the same field condition above, at the end of 1 year after the
alidation settlement
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