A clay layer with a sand layer on the top and a rock layer (impermeable layer) on the bottom. When a surcharge is applied, the clay layer will undergo a total 25 cm primary consolidation settlement. If 20 cm of the total consolidation settlement is achieved in 10 years, please find: Coefficient of consolidation, Cv (m2/year)  If the rock layer is replaced by a sand layer, how long will it take to finish 10 cm of the total consolidation settlement (year)?  If the coefficient of the volume compressibility (mv) is 0.001 m2/kN, what is the hydraulic conductivity of the clay (cm/s)?

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A: The given data is shown below:

Q: The time required for a 50% consolidation of a 25 mm thick layer (drained at both sides) in the…

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Q: Q3: A normally consolidated clay layer is 5 m thick (one-way drainage). From the application of a…

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Q: Laboratory tests on a 25mm thick clay specimen drained at both the top and bottom show that 50%…

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Q: A 12 ft. sandy fill is to be added to the saturated clay site shown below. The moist unit weight of…

A: Before loadingσ'=112.4-62.4×10=500 lb/ft2After loadingσ'=500+115×12=1880 lb/ft2σc'=1000 lb/ft2

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Q: A soil profile is shown in figure below. A uniformly distributed load, q=200 kPa, is applied at the…

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Q: In a consolidation test, when the load is changed from 50 kN/m² to 100 kN/m², then the void ratio…

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Calculation of Settlement

The vertical displacement of the structural foundation due to the loading from the superstructure is known as settlement. It is due to the reduction of air voids present in the soil. The amount of vertical displacement depends on the bearing capacity of the soil on which the foundation is laid. The effect of the settlement depends on the magnitude of settlement, uniformity, and the structural design of the structure. The maximum allowable settlement for residential and office buildings should be less than 18 mm, for industrial buildings, it is 38 mm and for commercial buildings, it is 25 mm.