(e) A soil profile consists of a clay layer between layers of sand, the water table being in the upper sand layer. Before the construction of a raft foundation for a large reservoir, piezometers were placed in the saturated clay layer. The whole process of filling the reservoir may be approximated to applying rapidly a single pressure increment of 200 kPa uniformly throughout the clay layer. One year after filling the reservoir, the piezometers indicated a distribution of excess porewater pressure as indicated in Figure Q-e. Estimate the average degree of consolidation at this time. [5]
(e) A soil profile consists of a clay layer between layers of sand, the water table being in the upper sand layer. Before the construction of a raft foundation for a large reservoir, piezometers were placed in the saturated clay layer. The whole process of filling the reservoir may be approximated to applying rapidly a single pressure increment of 200 kPa uniformly throughout the clay layer. One year after filling the reservoir, the piezometers indicated a distribution of excess porewater pressure as indicated in Figure Q-e. Estimate the average degree of consolidation at this time. [5]
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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![(e) A soil profile consists of a clay layer between layers of sand, the water table being in the
upper sand layer. Before the construction of a raft foundation for a large reservoir, piezometers
were placed in the saturated clay layer. The whole process of filling the reservoir may be
approximated to applying rapidly a single pressure increment of 200 kPa uniformly throughout
the clay layer. One year after filling the reservoir, the piezometers indicated a distribution of
excess porewater pressure as indicated in Figure Q-e. Estimate the average degree of
consolidation at this time.
[5]
2
10
80 120 160 200
Excess pore pressure(kN/m2)
40
Figure Q-e :](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffb7047f6-a226-4a4a-82b6-dc207e740b85%2Fa1990e78-7b77-4fbc-a192-c62a06e293bb%2Fif5e7uj_processed.png&w=3840&q=75)
Transcribed Image Text:(e) A soil profile consists of a clay layer between layers of sand, the water table being in the
upper sand layer. Before the construction of a raft foundation for a large reservoir, piezometers
were placed in the saturated clay layer. The whole process of filling the reservoir may be
approximated to applying rapidly a single pressure increment of 200 kPa uniformly throughout
the clay layer. One year after filling the reservoir, the piezometers indicated a distribution of
excess porewater pressure as indicated in Figure Q-e. Estimate the average degree of
consolidation at this time.
[5]
2
10
80 120 160 200
Excess pore pressure(kN/m2)
40
Figure Q-e :
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