SIT N. Assume a buried stratum of clay 1.83 m thick will be subjected to a stress increase of 33.6 kPa at the center of clay. The magnitude of the preconstruction soil overburden pressure Po=48 kPa at the center of the clay layer. A laboratory compression test indicates that the clay has a preconsolidation pressure of 72 kPa. Compression index is 0.30 and swell index is 0.05. Void ratio of clay is 1.50. a. Compute the settlement due to primary consolidation. b. If full consolidation settlement will require approximately 8 years, compute the settlement due to secondary compression of clay over a period of 20-year time span. Assume secondary compression index is 0.008. c. Estimate the total settlement to be expected over a 20-year time span considering effects of secondary compression.
SIT N. Assume a buried stratum of clay 1.83 m thick will be subjected to a stress increase of 33.6 kPa at the center of clay. The magnitude of the preconstruction soil overburden pressure Po=48 kPa at the center of the clay layer. A laboratory compression test indicates that the clay has a preconsolidation pressure of 72 kPa. Compression index is 0.30 and swell index is 0.05. Void ratio of clay is 1.50. a. Compute the settlement due to primary consolidation. b. If full consolidation settlement will require approximately 8 years, compute the settlement due to secondary compression of clay over a period of 20-year time span. Assume secondary compression index is 0.008. c. Estimate the total settlement to be expected over a 20-year time span considering effects of secondary compression.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:SIT N. Assume a buried stratum of clay 1.83 m thick will be subjected to a stress increase
of 33.6 kPa at the center of clay. The magnitude of the preconstruction soil
overburden pressure Po=48 kPa at the center of the clay layer. A laboratory
compression test indicates that the clay has a preconsolidation pressure of 72 kPa.
Compression index is 0.30 and swell index is 0.05. Void ratio of clay is 1.50.
a. Compute the settlement due to primary consolidation.
b. If full consolidation settlement will require approximately 8 years, compute the
settlement due to secondary compression of clay over a period of 20-year time
span. Assume secondary compression index is 0.008.
c. Estimate the total settlement to be expected over a 20-year time span considering
effects of secondary compression.
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