A layer of sand, 4m thick, overlies a layer of low permeability clay, 5m thick. The bulk unit weight of the sand is 16.5 kN/m3 and its saturated unit weight is 18 kN/m3 . The saturated unit weight of the clay is 21 kN/m3 . The water table exists initially at 1.0m below ground level but pumping will permanently and rapidly lower the water table to 3.0m below ground level. Determine the variation of total stress and porewater pressure at depth h in the clay and the long-term variation in effective stress. Calculate the initial (before pumping) and the long-term (after pumping) effective stress at the middle of the clay layer.

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: The subsoil strata at a site consist of fine sand 3.0 m thick overlying a stratum of clay 2.8 m…

A: The presence of groundwater can significantly impact the design of earth structures in several…

Q: A layer of sand extends from ground level to a depth of 9m and overlies a layer of clay, of very low…

A:

Q: 2m clay layer has values of e = 0.92 , Gs = 2.72 and liquid limit of 40%. Above the clay is a 3m…

A: The Compression Index (Cc) is equal to the slope of the pressure versus void ratio graph (log…

Q: when flowing through the same rock at 20°C? want weight = 8.44 kN/m³) 6.10 The maximum dry unit…

A: Given data - Relative compaction = 90% Max. dry unit weight in lab = 16 KN/m3 Gs = 2.7 k1 = 0.03…

Q: A layer of silt 3.5 m thick underlain by 3 m thick tay layer. The water table is located at 2.5 m…

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: A 6 m depth of sand layer has a dry unit weight of 14.9 kN/m' and satura weight of 18.1 kN/m³…

A: Gs = 2.7Cv = 4.3 m2/yr = 100 kPaNOTE : As per guidelines, 3 parts are solved. Request you to post…

Q: Determine: (a) the capillary height h, of the rise of the moisture into the sand stratum above the…

A:

Q: Can u solve this

A:

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.