Question.2 : A soil sample 25 cm in height and 10 cm in diameter, was tested under a constant head of 40 cm. The quantity of water collected after 13 minutes was equal to 700 ml. The soil has a saturated water content of 18% and a specific gravity of soil solids as 2.7. Calculate: 1. The hydraulic conductivity of the soil in cm/sec. 2. The seepage velocity during the test 3. The maximum exit hydraulic gradient If a dam is founded on this soil. Take a desired factor of safety of 3 against piping.

Q: The figure below is a constant-head permeability test device. The cross-sectional area of the sample…

A: Given data  Cross sectional area (A) = 120 cm2 Time (t) = 10 sec  Volume of water collect = 150 cm3…

Q: In a constant head permeability test, the soil sample had a cross-sectional area of 50 cm and height…

A: Given data : Area of soil sample (A)=50 cm2height (h)=6 cmHead (H)=40 cmVolume (V)=450 mLTime (t)=10…

Q: A constant-head test was conducted on a sample of soil 15 cm long and 60 cm^2 in cross-sectional…

A:

Q: If this soil sample was attached to a riser pipe and had flow conditions that are shown in the…

A:

Q: Consider the stratified soil sample shown below with k₁ = 0.01 cm/sec, k₂ = 0.02 cm/sec, H₁ = 10 cm,…

A:

Q: A 15 cm vertical soil sample is taken and placed in constant head permeameter. The surface area of…

A: Given Length of sample (L)=15 cm  Area of cross section of sample (A)= 20 cm2  Head loss (H)=( h1-h2…

Q: 2 he= hp = h₂= cm cm cm

A:

Q: constant-head permeability test was conducted on a soil sample retained inside a with a length of…

A: WE KNOWk=qLAhq=VolumeTimeVolume=55cm3time=3hr 15min=195min=195·60 sec

Laboratory Determination of Hydraulic Conductivity

Hydraulic conductivity is the measure of flowability of water inside the soil in the presence of a hydraulic gradient. The hydraulic gradient is defined as the difference in the water heads in the soil, which induces a water motion. In simple terms, a hydraulic gradient is the presence of a potential that induces a flow of water.