Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 9, Problem 9.16P
(a)
To determine
Calculate the consolidation settlement in the first two years.
(b)
To determine
Calculate the compression index of the clay.
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Chapter 9 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
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- For a normally consolidated soil, the following is given: Determine the following: a. The compression index, Cc. b. The void ratio corresponding to pressure of 200 kN/m2arrow_forwardUnder normal loading condition, a 3.6-m thick clay (normally consolidated) has po = 190 kPa and eo = 1.22. A surcharge of 190 kPa reduces its void ratio to 0.91. The hydraulic conductivity of the clay for the loading range is 6.1 x 10-5 m/day. a. What is the coefficient of volume compressibility of the clay? b. What is the coefficient of consolidation of the clay? c. How long will it take for this clay layer to reach 60% consolidation if it is drained on one side only? Please answer this asap. For upvote. Thank you very mucharrow_forwardHello professor thank uarrow_forward
- A 5 m thick clay layer lies between two layers of sand each 4 m thick, the top of the upper layer of sand being at ground level. The water table is 2 m below the ground level but the lower layer of sand is under artesian pressure, the piezometric surface being 4m above ground level. The 27 saturated unit weight of clay is 20 kN/m³ and that of sand is 19 kN/m³. Above the water table unit weight of sand is 16.5 kN/m³. Calculate the effective vertical stresses at the top and bottom of the clay layer. Also draw the total vertical stress diagram in the given soil layers.arrow_forwardA stratified soil sample has the following profile characteristics: LAYER 1: The upper later is a 4-m thick sand layer with void ration = 0.61 and specific gravity of solids = 2.65. LAYER 2: The lower layer is a 5-m thick clay layer with void ration = 0.48 and specific gravity of solids = 2.67. If the ground water table is situated at the interface between the sand and clay layers, evaluate the effective stress (in kPa) at the bottom of the sand layer, and the effective stress at the bottom of the clay layer.arrow_forwardASAParrow_forward
- 1. Under normal loading condition, a 3.6 m thick clay (normally consolidated) has P, = 190 KPa and e, =1.22. A surcharge of 190 KPa reduces its void ratio to 0.98. The hydraulic conductivity of the clay for the loading range is 6.1 x 10ʻ m/day. a. What is the coefficient of volume compressibility of the clay? b. What is the coefficient of consolidation of the clay? c. How long will it take for this clay layer to reach 60% consolidation if it is drained on one side only?arrow_forwardAt a planned construction site, a 2 m. thick stratum of normally consolidated clay underlies a surface layer of compact granular soil 3 m. deep. The unit weight for the compact granular soil is 20.2 kN/m3. The clay material has a unit weight of 17.6 kN/m3. The groundwater table is 3 m. from the ground. Laboratory testing of the clay indicates an in-place void ratio of 1.35 and a compression index of 0.42. The building planned for the site will create a stress increase of 24.5 kN/m2 at the center of the clay layer.a) Determine the primary settlement due to stress increase.b) Calculate the primary settlement to be expected if the groundwater table were at the soil surface. Assume that the saturated unit weight is 24 kN/m3.c) Determine the primary settlement occurring in the clay layer if the clay is overconsolidated, Cs = 0.09 and the preconsolidated pressure is 120 kPa.arrow_forwardA 5 m thick clay layer lies between two layers of sand each 4 m thick, the top of the upper layer of sand being at ground level. The water table is 2 m below the ground level but the lower layer of sand is under artesian pressure, the piezometric surface being 4 m above ground level. The saturated unit weight of clay is 20 kN/m3 and that of sand is 19 kN/m³ above the water table unit weight of sand is 16.5 kN/m². Calculate (a) the effective vertical stress at the top and bottom of the clay layer (b) Also draw the total vertical stress diagram in the given soil layers.arrow_forward
- 1.) The soil profile consist of 10 m layer of sand underlain by a 5.5 m layer of clay. The location of water table is 4 m from the ground surface. The unit weight of sand above the water table is 16.05 kN/m^3 and below the saturated unit weight of sand is 18.11 kN/m^3. The clay has a saturated unit weight of 20.73 kN/m^3, void ratio equal to 0.75, and liquid limit of 40. If a uniformly distributed load, Ao = 75 kPa, is applied at the ground surface, what is the settlement of the clay layer caused by primary consolidation if a. The clay is normally consolidated b. The preconsolidation pressure is 200 kN/m^2arrow_forward2. Solve and show solution.arrow_forward-14. A fine sand has an in-place unit weight of 18.85 kN/m³ and a water content of 5.2%. The specific gravity of sol ids is 2.66. Void ratios at densest and loosest conditions are 0.38 and 0.92, respectively. Find the relative density.arrow_forward
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