Determine the overconsolidation ratio at 2m, 6m and 20m depth below ground level.

Q: For a given soil, the in-situ porosity is 0.35 and Gs=2.65. Calculate: a) the void ratio, b) dry…

A: Given data:Porosity (n)=0.35Specific gravity (G0=2.65

Q: A 3m deep sand layer has a specific gravity of 2.68 and a void ratiodf 0.60. Under this layer is a…

A: Compression index is CC=eo-eflogσ1+Δσσ1soFind inital void ratio of claySeo=woG1eo=0.32.7eo=0.81

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: Cv = 0.79 m2/yr = 20 kN/m3

Q: 2. A normally consolidate d clay layer, 3 m thick, has the following properties: Initial void ratio,…

A: To find settlement after 5 year

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: In the soil profile shown below, the clay is normally consolidated and H,=9m, H2=5m, H3=3m. The…

A: Given  For sand  e= 0.56 , Gs = 2.6  Clay  Liquid limit= 63 % e= 0.83, Gs= 2.77

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

A:

Q: 50 ft thick sand is underlain by 25 ft clay. The ground water table, initially at the ground…

A: To find :- Effective tive stress at middle of clay layer when  1. Water table is at ground surface…

Q: A horizontal stratified soil deposit consists of three uniform layers whose thicknesses are 6, 3, 12…

A: K1 = 4 X 10-4 mm/sK2 = 25 X 10-4 mm/sK1 = 7.5 X 10-4 mm/sTo Find :The effective average permability…

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Q: Calculate the saturated density from void ratio 0.8.

A: The saturated density of soil is defined as the bulk density of soil when the soil is below water…

Field applications of hydraulic conductivity

Hydraulic conductivity is one of the hydraulic properties of soil defined as a measurement of the ability of a porous medium to permit water movement or fluid flow through it. It is denoted by the letter K. It is influenced by the density and viscosity of the fluid. It is also called permeability. Hydraulic conductivity is defined as the ratio of velocity to the hydraulic gradient. The different methods used to determine the hydraulic conductivity are laboratory methods (constant head permeability tests and falling head tests), in-situ field methods (pumping in and pumping out tests), small scale field tests (infiltration tests and slug tests), and indirect methods such as estimation from grain size, consolidation test data, and horizontal capillary test. The pedotransfer function (PTF) method is a specific empirical estimating approach employed in the soil sciences is also used to determine the hydraulic conductivity of the soil.