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.

Q: A silty sand fill 4.5 meters thick and an estimated density of 20 kN/m³ is to be placed over 4.0 m…

A: eo = 1.255Cc = 0.29Cr = 0.035Cv = 0.79 m2/yrNOTE : As per guidelines, first 3 parts are solved.…

Q: Question (3) (30 pts) A soil profile beneath a lake consists of 8 m thick sand layer underlain by a…

A: See explanation Explanation:Step 1:Step 2:Step 3: Step 4:

Q: The profile at a site consists of 5m of sand overlying 10m of compressible clay, which in turn…

A: The excess pore water pressure is developed in the clay layer by immediately placing the surcharge…

Q: I H₂ = 5m e = 0.4 G₂ = 2.68 Details of Soil Layer H₂ = 4m e = 0.6 G₂ = 2.73 III H₂ = 3m 8 =…

A:

Q: A cubic meter of dry (no water) quartz sand (G, = 2.65) with a porosity of 60% is immersed in an oil…

A: Vt = 1 m3Gs = 2.65n = 60% or 0.60 = 0.92 g/cm3 or 920 kg/m3 Vair = 0.27 m3

Q: 9. A cubic meter of a saturated, normally consolidated clay has a dry mass of 4 kg and a porosity of…

A: Since we know that                 Void ratio (e) = Porosity1- porosity = n1-n Here porosity (n) =…

Q: Q3. A soil in its natural state is partially saturated having a water content of 17.5% and a void…

A:

Q: The profile at a site consists of 5 m of sand overlying 10 m of compressible clay, which in turn…

A: The excess pore water pressure developed immediately after placing the stress of 200 kPa is…

Q: /

A:

Q: The relationship between the specific gravity of sand (G) and the hydraulic gradient (i) to initiate…

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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.