Load Sand
10m Clay
Bedrock
Page 4 of8
Consider a 10 m thick clay layer shown in the figure below. The
coefficient of consolidation for this clay was measured to be 0.544
x 10? cm7/s. The clay layer settles 9 cm in 3.5 years.
(a) Compute the ultimate consolidation settlement. [Unit: cm] (5
marks)
(b) Estimate how long it will take to settle to 90% of the
ultimate settlement. [Unit: year] (5 marks)
(c) Calculate the degree of consolidation at the top, middle,
and bottom of the clay layer, when the consolidation time is 3.5
years. (6 marks)
Load Sand 10m Clay Bedrock Page 4 Of8 Consider A 10 M Thick Clay Layer Shown In The Figure Below The Coefficient Of Con 1 (326.33 KiB) Viewed 65 times
Question A4 (20 marks) Consider a 10 m thick clay layer shown in the figure below. The coefficient of consolidation for this clay was measured to be 0.544 x 10-2 cm²/s. The clay layer settles 9 cm in 3.5 years. Load Sand 10 m Clay Bedrock (a) Compute the ultimate consolidation settlement. [Unit: cm) (5 marks) (b) Estimate how long it will take to settle to 90% of the ultimate settlement. [Unit: year] (5 marks) (C) Calculate the degree of consolidation at the top, middle, and bottom of the clay layer, when the consolidation time is 3.5 years. (6 marks) (d) If the clay layer continues to settle after the average degree of consolidation reaches 100%, what would be the main reason? (4 marks)
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