soil profile as shown with a silty sand (ѵ = 15 kN/m3; ѵsat = 17 kN/m3) underlain by high- plasticity clay (ѵsat = 17 kN/m3) and a peat layer (ѵsat = 16 kN/m3), followed by dense sand. To expedite consolidation and minimize future settlement, an additional 2-m-thick fill material, compacted to a unit weight of 19 kN/m3, will be placed on top of the silty sand layer. The plan area of the fill is 10 m x 10 m. The fill load will be left in place for 2 years, after which construction will begin with the fill becoming part of the permanent foundation. Undisturbed samples collected from the clay and organic layers had the following properties: Estimate the total consolidation settlement under the action of the fill load? Consider both the clay and peat layers to be normally consolidated. Estimate the time for 99% primary consolidation in each layer. Are the layers singly or doubly drained? Explain.
soil profile as shown with a silty sand (ѵ = 15 kN/m3; ѵsat = 17 kN/m3) underlain by high- plasticity clay (ѵsat = 17 kN/m3) and a peat layer (ѵsat = 16 kN/m3), followed by dense sand. To expedite consolidation and minimize future settlement, an additional 2-m-thick fill material, compacted to a unit weight of 19 kN/m3, will be placed on top of the silty sand layer. The plan area of the fill is 10 m x 10 m. The fill load will be left in place for 2 years, after which construction will begin with the fill becoming part of the permanent foundation. Undisturbed samples collected from the clay and organic layers had the following properties: Estimate the total consolidation settlement under the action of the fill load? Consider both the clay and peat layers to be normally consolidated. Estimate the time for 99% primary consolidation in each layer. Are the layers singly or doubly drained? Explain.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
A soil profile as shown with a silty sand (ѵ = 15 kN/m3; ѵsat = 17 kN/m3) underlain by high- plasticity clay (ѵsat = 17 kN/m3) and a peat layer (ѵsat = 16 kN/m3), followed by dense sand. To expedite consolidation and minimize future settlement, an additional 2-m-thick fill material, compacted to a unit weight of 19 kN/m3, will be placed on top of the silty sand layer. The plan area of the fill is 10 m x 10 m. The fill load will be left in place for 2 years, after which construction will begin with the fill becoming part of the permanent foundation. Undisturbed samples collected from the clay and organic layers had the following properties:
- Estimate the total consolidation settlement under the action of the fill load? Consider both the clay and peat layers to be normally consolidated.
- Estimate the time for 99% primary consolidation in each layer. Are the layers singly or doubly drained? Explain.
- Estimate the secondary compression in each layer?
- What will be the total settlement after 2 years?
- Determine the effective stress at point A three months after the application of the fill loads.
![Fill load (kN/m2)
2 m
Silty'sand
2 m
4 m
Clay
2 m
Peat
Dense sandđ
Layer
C.
C.
c, (cm²/sec)
Clay
0.36
0.03
0.003
1.1
Peat
6.6
0.263
0.025
5.9](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6cd4ba0b-0a64-4623-b921-f39819a0c0c7%2F548e5533-4058-447c-998f-42c7ae56a33c%2Frvrgmh_processed.png&w=3840&q=75)
Transcribed Image Text:Fill load (kN/m2)
2 m
Silty'sand
2 m
4 m
Clay
2 m
Peat
Dense sandđ
Layer
C.
C.
c, (cm²/sec)
Clay
0.36
0.03
0.003
1.1
Peat
6.6
0.263
0.025
5.9
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