A compressible stratum is 6 m thick and its void ratio is 1.70. If the final void ratio after the construction of a building is expected to be 1.61, what will be the probable ultimate settlement of the building in cm? a. 345.5 b. 63.75 c. 20 d. 12.68

A compressible stratum is 6 m thick and its void ratio is 1.70. If the final void ratio after the construction of a building is expected to be 1.61, what will be the probable ultimate settlement of the building in cm? a. 345.5 b. 63.75 c. 20 d. 12.68

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter9: Consolidation

Section: Chapter Questions

Problem 9.17P

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A compressible stratum is 6 m thick and its void ratio is 1.70. If the final void ratio after the construction of a building is expected to be 1.61, what will be the probable ultimate settlement of the building in cm? a. 20 b. 12.68 c. 345.5 d. 63.75
A 3 meter thick fill was placed over a 9 meter thick compressible clay. Underlying the clay layer is a very hard impermeable clay. The groundwater table is located on top of the compressible clay. A circular tank 9 meters in diameter transfers a surface contact stress of 45 kPa. Assume for this problem that the settlement of the fill and the very hard clay is small compared to the settlement of the compressible clay. a) Calculate the initial void ratio and saturated density of the compressible clay. b) Divide the compressible layer into two sublayers of equal thickness. The preconsolidation pressure is 100 kPa for the upper sublayer and 160 kPa for the lower sublayer. Calculate the following at the center of each sublayer: the increase in vertical stress caused by the tank underneath its center, and the consolidation setttlement due to the combined effect of the tank and weight of fill. c) How long will it take for 0.18 meters of settlement to occur? d) After 3.6 years, what…
A compressible 6 m thick clay layer has initial void ratio of 1.70. If final void ratio after construction of building is expected to be 1.61, then what is the coefficient of volume compressibility of soil layer? Assume that during settlement, 150 kN/m^2 increment in stress is observed.
The soil profile consists of a 12 m layer of sand, 6 m layer of clay and incompressible bedrock.The water table is located 5 m below the ground surface. The weight of sand above the watertable is 17.9 kN/m3 below is 18.4 kN/m3 . The saturated weight of the clay is 18.2 kN/m3. Clayhas a compression index of 0.18 and a void ratio of 0.80. If the structure to be built on theground will increase the soil pressure by 100 kPa, determine the settlement of the clay layer.
A clay layer, whose total settlement under a given loading is expectedto be 13cm settles 3 cmat end of 1 months after application of load increment. How many months will be required to reach a settlement of 8cm? How much settlement will occur in 12months? Assume the layer to have double drainages
The soil profile at a site consists of 2 m of sand at the groundlevel, underlain by 6 m of clay, followed by a very stiff claystratum that can be assumed to be impervious and incompressible.The water table is at 1.5 m below the ground level. Themoist and saturated unit weights of the sand are 17.0 kN/m3and 18.5 kN/m3, respectively. The clay has an initial void ratioof 0.810, saturated unit weight of 19.0 kN/m3, and coefficientof consolidation of 0.0014 cm2/s.a. When the ground is surcharged with 3 m high compactedfill with moist unit weight of 19.0 kN/m3, the settlementwas 160 mm in the first year. What would be the consolidationsettlement in the first two years?b. If the clay is normally consolidated, what is the compressionindex of the clay?
Why is pore pressure negative within the zone of capillary rise? Why would the actual pore pressure be affected by the degree of saturation of the soil? Explain thoroughly.
A 3.75 m thick clay layer (drained on one side) is normally consolidated. When the pressure increase from 50 KN/m2 to 150 KN/m2 , the void ratio decreases from 0.9 to 0.75.For the clay Cv=0.24 cm2/sec.a. Interpret the time in days for the clay layer to reach 50% consolidation. b. Interpret the settlement at that time i.e, at 50% consolidation.
A 5.1 m thick clay soil with a current overburden pressure of 89 kPa is going to experience an additional stress of 89 kPa after a new structure is built. If it was determined that the clay is normally consolidated has an initial void ratio of 1.2, a recompression index of 0.07, and a compression index of 0.47. Determine the total amount of settlement that is expected to occur. Provide your answer in meters to 3 decimal places.
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