6m 4m ↓↓↓↓↓↓↓↓↓↓↓↓ 2m_ Sand Clay Rock Figure Q2 W.T. Soil properties: For the sand above the water table, it has a unit weight of 17 kN/m³, whilst the saturated sand has a saturated unit weight of 19 kN/m³. For the clay, the saturated unit weight is 16 kN/m³ and the coefficient of consolidation c, is 1.26m²/year. The clay is normally consolidated and has a compression index C,= 0.32 and a recompression C,= 0.018. The initial void ratio of the clay is 0.89 at mid-depth of the clay layer. The rock can be assumed to be impermeable. (a) Calculate the final settlement of the area due to consolidation of clay. (b) Calculate the settlement after a period of 3 years from the start of applying the surcharge. (c) If a very thin and highly permeable material existed below the clay layer, how would this thin layer affect the final and the 3 year settlement.

6m 4m ↓↓↓↓↓↓↓↓↓↓↓↓ 2m_ Sand Clay Rock Figure Q2 W.T. Soil properties: For the sand above the water table, it has a unit weight of 17 kN/m³, whilst the saturated sand has a saturated unit weight of 19 kN/m³. For the clay, the saturated unit weight is 16 kN/m³ and the coefficient of consolidation c, is 1.26m²/year. The clay is normally consolidated and has a compression index C,= 0.32 and a recompression C,= 0.018. The initial void ratio of the clay is 0.89 at mid-depth of the clay layer. The rock can be assumed to be impermeable. (a) Calculate the final settlement of the area due to consolidation of clay. (b) Calculate the settlement after a period of 3 years from the start of applying the surcharge. (c) If a very thin and highly permeable material existed below the clay layer, how would this thin layer affect the final and the 3 year settlement.

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter10: Shear Strength Of Soil

Section: Chapter Questions

Problem 10.22P

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