The figure below shows a 24 m thick layer of normally consolidated clay (ϒt = 18.6 kN/m3) that is one-dimensionally loaded by Δσv = 100 kPa. The clay layer is below a 4 m thick layer of granular fill (ϒt = 19.6 kN/m3), and a dense, compacted glacial till underlies the clay. The water table is located at the top of the clay layer. A 1-D consolidation test is performed on a 2.50 cm thick, doubly drained specimen from the middle of the clay layer. When the stress conditions from the field (including Δσv = 100 kPa) are applied to this specimen, it takes 6 min for 90% average consolidation to occur. a. From the lab test data, determine cv for the soil. b. Compute the pore pressure at depth 22 m before and immediately after the 100 kPa stress is applied. c. At depth 22 m, compute the pore pressure 8.5 years after the 100 kPa is applied.
The figure below shows a 24 m thick layer of normally consolidated clay (ϒt = 18.6 kN/m3) that is one-dimensionally loaded by Δσv = 100 kPa. The clay layer is below a 4 m thick layer of granular fill (ϒt = 19.6 kN/m3), and a dense, compacted glacial till underlies the clay. The water table is located at the top of the clay layer. A 1-D consolidation test is performed on a 2.50 cm thick, doubly drained specimen from the middle of the clay layer. When the stress conditions from the field (including Δσv = 100 kPa) are applied to this specimen, it takes 6 min for 90% average consolidation to occur.
a. From the lab test data, determine cv for the soil.
b. Compute the pore pressure at depth 22 m before and immediately after the 100 kPa stress is applied.
c. At depth 22 m, compute the pore pressure 8.5 years after the 100 kPa is applied.
Trending now
This is a popular solution!
Step by step
Solved in 6 steps with 7 images
