9-19. A certain doubly drained clay layer has an expected ultimate settle- ment s. of 15 cm. The clay layer, which is 17 m thick, has a coefficient of consolidation of 5 × 10- cm?/s. Plot the s-time rela- tionship to (a) an arithmetic time scale and (b) a semilog time scale. 9-20. Given the same soil data as for Problem 9-19. After 3 yr, an identical load is placed, causing an additional 15 cm of consolidation settle- ment. Compute and plot the time rate of settlement under these conditions, assuming that the load causing consolidation settlement is placed instantaneously.
9-19. A certain doubly drained clay layer has an expected ultimate settle- ment s. of 15 cm. The clay layer, which is 17 m thick, has a coefficient of consolidation of 5 × 10- cm?/s. Plot the s-time rela- tionship to (a) an arithmetic time scale and (b) a semilog time scale. 9-20. Given the same soil data as for Problem 9-19. After 3 yr, an identical load is placed, causing an additional 15 cm of consolidation settle- ment. Compute and plot the time rate of settlement under these conditions, assuming that the load causing consolidation settlement is placed instantaneously.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Please solve the problem 9-20. image is uploaded for reference.
Transcribed Image Text:9-19. A certain doubly drained clay layer has an expected ultimate settle-
ment s. of 15 cm. The clay layer, which is 17 m thick, has a
coefficient of consolidation of 5 x 10- cm?/s. Plot the s-time rela-
tionship to (a) an arithmetic time scale and (b) a semilog time scale.
's,
9-20. Given the same soil data as for Problem 9-19. After 3 yr, an identical
load is placed, causing an additional 15 cm of consolidation settle-
ment. Compute and plot the time rate of settlement under these
conditions, assuming that the load causing consolidation settlement
is placed instantaneously.
9-21. Given the same data as for Problem 9-19. The load causing the 15
cm ultimate settlement was placed over a period of 2 yr. Although
we haven't discussed how to handle this kind of problem, describe
the approach you would use to compute the time history of settle-
ment.
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