Q-3: The constant-head permeability test arrangement in a two-layered soil has been arranged as shown in Figure. During the test, it was seen that when a constant head of h₁= 200 mm was maintained, the magnitude of h2 was 80 mm. If ki is 0.004 cm/sec, determine the value of k2. (given that H₁-100 mm and H₂= 150 nm). h₂ h₂ Soil 1 (k₁) ||1 Water supply ►||1 Soil 2 (k₂) TT h z H₁ ⒸCengage Learning 2014

A falling head permeability test was carried out on a 15cm long of silty clay. The diameter of the sample and the stand pipe were 9.8cm and 0.75cm respectively. The water level in the stand pipe was observed to fall from 7ocm to 45cm in 12minutes. Determine the coefficient of permeability of the soil in m/day and the height of water level in stand pipe after 20minutes.

A constant head permeability test is performed on soil that is 4 cm2, and 2.5cm long. The head difference applied during the test is 20 cm and 7 cm3 is collected over a time of 100 sec. Then, falling head test is conducted on the same soil specimen at the same time  (t1 – t2 = 100 sec), and the standpipe diameter is 0.8 cm. If the average head during the test should be 18 cm, what are h1 and h2 values, provide step by step solution solving h1 and h2 values.

Three CU tri-axial tests were performed oa samples retrieved from a 4-meter-thick layer of saturated clay layer (ysat-20.7 KN cubic meter). The top of the clay and the water level are at the ground surface. The results of these three tests (in kN/sq. m) are summarized ia the following table: Test Chamber Pressure, o3 Deviator Stress, Aod Pore Pressure@ Failure AU, (KNsq m) (KNsq m) 1) 82 171 -13 2) 156 302 -56| 3) 257 414 -84 a. Determine graphically and by formula the Motr-Coulomb effective shear strength parameters e (in kN'sq m) aad o b. Estimate the shear strength in the middle of the clay layer in kN/sq m.

Homeworks 2. The following results were obtained from an oedometer test on a specimen of saturated clay: Pressure (kN/m?) 27 54 107 214 429 214 107 54 Void ratio 1.243 1.217 1.144 1.068 0.994 1.001 1.012 1.024 A layer of this clay 8m thick lies below a 4m depth of sand, the water table being at the surface. The saturated unit weight for both soils is 19kN/m3. A 4m depth of fill of unit weight 21 kN/m3 is placed on the sand over an extensive area. Determine the final settlement due to consolidation of the clay. -1 e -eo 1+e, o'y-o'vo my S = i=l

Please answer my homework problem. show all work so I can understand. thank you!

Prob. In a constant head permeability test following results observed - Distance between piezometer tappings = 100 mm Difference of water levels in piezometers = 60 mm Diameter of test sample = 100 mm Quantity of water collected = 350 ml in 270 sec Determine the coefficient of permeability of the soil.

The 2nd picture is the continuation of the question in the 1st picture.

3-8 A 1-ft3 of undisturbed soil sample has a dry weight of 107 lbs. The specific gravity of the soil solids is 2.70. Need Vs VT = 1 To solve for Vs = use the following equation Ws=Vs*Gs*yw (solve for Vs) a) Calculate the void ratio of the sample. b) Calculate the porosity of the sample. DC

In a falling permeameter, the sample used is 20 cm long having a cross-sectional area of 24 cm2. The sample of soil is made of three layers. The thickness of the first layer from the top is 8 cm and has a value of k1 = 2 x 10-4 cm/s, the second layer of thickness 6 cm has k2 = 5 x 10-4 cm/s and the bottom layer of thickness 4 cm has k3 = 7 x 10-4 cm/s. Assume the flow is taking perpendicular to the layers. Estimate the average hydraulic conductivity of soil in the vertical direction. a.3.12 x 10-4 cm/s b.5.69 x 10-4 cm/s c.2.35 x 10-4 cm/s d.4.28 x 10-4 cm/s e.6.69 x 10-4 cm/s