Q: The constant-head permeability test arrangement in a two-layered soil has been arrangedas shown in Figure. During the test, it was seen that when a constant head of h₁= 220 mm wasmaintained, the magnitude of h2 was 70 n If ki is 0.005 cm/sec, determine the value of k2.(given that H₁-120 mm and H₂= 160 mm).h₁Soil 1 (ky)►1Soil 2 (k₂)Water supplyThTTH₁H₂©ⒸCengage Learning 2014

Answered: Image /qna-images/answer/fcab2326-8ef8-469c-b0c4-2e8708e3b0a7.jpg

2: The constant-head permeability test arrangement in a two-layered soil has been arranged s shown in Figure. During the test, it was seen that when a constant head of hi= 220 mm was naintained, the magnitude of h2 was 70 n If ki is 0.005 cm/sec, determine the value of k2. given that H₁-120 mm and H₂= 160 mm). m₂ I 1 Soil 1 (k₁) Soil 2 (k₂) Water supply ETT h z H₁ ⒸCengage Learning 2014

2: The constant-head permeability test arrangement in a two-layered soil has been arranged s shown in Figure. During the test, it was seen that when a constant head of hi= 220 mm was naintained, the magnitude of h2 was 70 n If ki is 0.005 cm/sec, determine the value of k2. given that H₁-120 mm and H₂= 160 mm). m₂ I 1 Soil 1 (k₁) Soil 2 (k₂) Water supply ETT h z H₁ ⒸCengage Learning 2014

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter7: Permeability

Section: Chapter Questions

Problem 7.17P

See similar textbooks

Similar questions

Refer to the constant-head permeability test arrangement in a two-layered soil as shown in Figure 8.2. 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 k1is 0.004 cm/sec, determine the value of k2 given H1 = 100 mm and H2 = 150 mm.
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 mm). h₂ h₂ Soil 1 (k₁) Soil 2 (K₂) Water supply TT h z H₁ ⒸCengage Learning 2014
Q3): (A): The result of constant head permeability test for sand sample having a diameter of 100 mm and a length of 200 mm are as follows: Constant head difference= 300 mm, time of collection of water= 3 min, volume of water collected 250 cc. Find the coefficient of permeability for the soil.
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
HYDRAULIC CONDUCTIVITY PROBLEM 1: The results of a constant head permeability test for a fine sand and sample having a diameter of 150 mm and a length of 150 mm are as follows: Constant head difference = 40 cm Time of collection of water = 83 sec Weight of water collected = 392 g Find the hydraulic conductivity a. 0.094 cm/sec b. 0.01 cm/sec C. c. 0.005 cm/sec d. 0.86 cm/sec
ZAIN IQ I. Homework 4... During an oedometer test on a specimen of saturated clay, the thickness of the specimen decreased from 19.931 mm to 19.720 mm under an increment of stress from 200 to 400 kPa which was maintained for 24 hours. The stress was then removed from the specimen, its thickness was measured water content determined as 26.8%. 19.842 mm, and its Taking Gs of the particles to be 2.70, calculate the void ratio before and after the application of the stress increment, and the coefficient of volume decrease (m,) for this stress range. (Ans: e,= 0.731, e2= 0.713, m, = 0.052 m/MN)
Q1/ specimen of the fine-grained soil, 75 mm in diameter and 20 mm thick was tested in an oedometer in a laboratory. At applying pressure (240 kN/m²), the time with dial gauge readings are: Time (min) 0 Settlement (mm) 0 0.25 1 0.22 0.42 Vertical pressure (kPa) 15 Settlement (mm) 0.1 Void ratio 1.88 4 0.6 30 0.11 1.87 9 0.71 16 0.79 And the void ratio and settlement for each load increment is shown in the table below. 60 0.21 1.85 120 1.13 1.72 100 1.04 36 64 0.91 0.86 240 2.17 1.57 480 3.15 1.43 1- Find Coefficient of consolidation in cm²/s using root time and TV90% = 0.848. 2- Find Preconsolidation pressure (oc) and compression index (Cc). Scanned by TapScanner
A series of previous tests has established that the ultimate effective friction angle of a NC clayey soil is 19.2°. If a CD test is now performed on this soil with a cell pressure of 105 kPa, what would be deviator stress at failure? Given: o3 = Kao, where Ka 1-sin o' 1+sin o'
The results of a constant-head permeability test for a fine sand sample having a diameter of 70 mm and a length of 140 mm are as follows (refer to Figure 7.5):• Constant-head difference = 550 mm• Water collected in 7 min = 450 cm3• Void ratio of sand = 0.8Determine:a. Hydraulic conductivity, k (cm/sec)b. Seepage velocity
6- For a falling-head permeability test, the following are given: Length of soil specimen= 700 mm • Area of the soil specimen=20 cm² Area of the standpipe= 1.05 cm² Head difference at time t = 0 is 800 mm . . • Head difference at time t= 8 min is 500 mm a. Determine the absolute permeability of the soil. b. What is the head difference at time 6 min? = Assume that the test was conducted at 20= °C, and at 20= °C, Yw- 9.789 kN/m³ and n=1.005x10³ Ns/m².
PROBLEM 2: During a constant-head permeability test on a sand sample, 260 x 10° mm³ of water were collected in 2 minutes. If the sample had a length of 100 mm, a diameter of 40 mm and a maintained head of 200mm. What is its coefficient of permeability? a. 0.769 mm/s b. 0.967 mm/s c. 1.321 mm/s d. 0.862 mm/s
The results of a constant head permeability test for a fine sand are as follows: Diameter of the sample = 31 cm Length of sample = 98 cm Constant head difference = 52 cm Time of collection = 364 secs Weight of water collected = 448 grams Find the seepage velocity in cm/min. if the void ratio is 0.33. Round off to four decimal places. Answer: 0.3943