2 he= hp = h₂= cm cm cm
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- On close investigation of a sample it was found to be in three layers 20mm, 60mm, and 40mm. The permeability of these layers are 3x10-³mm/sec, 5x10-4mm/sec, and 17x10-4mm/sec respectively. Find kH kyi H, +kµz ·H, +kµ3 H; +…+ k, · H, HName.. Q3 Water flows through the constant head setup in the laboratory, as shown in the figure, where two identical dense sand samples A and B are placed-one horizontally and the other vertically. The samples are 50 mm diameter and 100 mm in length. The water levels in the left and right sides are maintained at the levels shown, ensuring constant head throughout the test. The void ratio of the sand is 0.92 and the specific gravity of the grains is 2.69. If 165 g of water was collected in the bucket within 15 minutes, 1. What is the permeability of the soil? 2. What the pore water pressure and vertical effective stress at the mid height of sample B? OH 2 190 100+100 A = (50) 7 9 = 0.95 1963.5 100 mm crosesection מות 190 Datumn 40 mm 100 min Arey B.In falling head permeability test the initial head was 350 mm and the final head was 50 mm. The cross-sectional area of the burette was 200 mm2. The sample was 50 mm in diameter and 100 mm long. If the test took 8 hours and 45 minutes, what was the coefficient of permeability of the soil in m/s? a.7.15 x 10-7 m/s b.6.29 x 10-7 m/s c.7.89 x 10-7 m/s d.8.78 x 10-7 m/s e.5.69 x 10-7 m/s
- Q: I an oedometer test on a specimen of saturated clay (Gs = 2.72), the applied pressure was increased from 107 1o 214 kPa and the following compression readings recorded: TaBLE| Tmen 0 025 05 1 225 4 &5 9 16 Guugelmm) 78 742 732 721 6% 678 &6 643 637 Teme(mi) 25 % 4 s om0 X0 a0 Guge(nm) 629 626 621 618 616 615 610 602 After 1440 min, the thickness of the specimen was 15.30 mm and the water content was 23.2%. Determine the values of the coefficient of consolidation and the compression atios from (a) the root time plot and (b) the log time plot. Determine also the values of the coefTicient of volume compressibility and the coefficient of permeability.The results of a laboratory consolidation test on a clay specimen are the following. Pressure, ir (lb/ft²) 500 1.000 2.000 4.000 8,000 16.000 Total height of specimen at end of consolidation (in.) 0.6947 0.6850 0.6705 0.6520 0.6358 0.6252 Given the initial height of specimen = 0.748 in.. G specimen = 95.2 g. and area of specimen = 4.91 in.²: a. Plot the e-log or curve = 2.68. mass of dry b. Determine the preconsolidation pressure c. Calculate the compression index, C.From the constant head permeability test arrangement shown, the following values are given: Void ratio of specimen = 0.46 Length of Soil Sample = 450mm Constant head difference = 700mm Water collected in a period of 3 min = 0.000354 m3 Cross-sectional Area of Soil Sample = 0.00226 m2 Determine the coefficient permeability in m/hour (Ans: 2.102 m/hr) Compute the discharge of velocity in m/min. (Ans: 0.052 m/min) Compute the seepage velocity in m/min. (Ans: 0.165 m/min)
- A thin-walled tube or a Shelby tube is: Select one: O a. used to obtain undisturbed cohesive or clayey soil samples b. sharpened at its bottom end c. pushed into the soil O d. all of the aboveSample 2: Mass with empty mold M1 Mass of soil and mold M2 Hydraulic Head h Time interval t Volume V 145 g 250 g 950 mm 0.34 min 0.0046 L 145 g 260 g 900 mm 0.33 min 0.0049 L 145 g 228 g 922 mm 0.30 min 0.0051 L 145 g 281 g 915 mm 0.29 min 0.0044 L 145 g 219 g 908 mm 0.39 min 0.0042 L The diameter of the mold = 2.5 cm, Length of the sample = 0.3 m can u pls Find the permeability coefficient Mass of the soil Bulk Density Dry Density thank you Void RatioCalculate K for the soil tested in the figure. Assume the cross-sectional area of the sample is 14 cm² and the area of the standpipe is 2cm². The time of test = 15 min. All dimensions shown are in mm. D 270 T 200 soil 70 580 310
- A balloon type apparatus is sued to determine an in-place unit weight for a soil. The volume of the test hole determined by reading the water level graduations on the apparatus cylinder before and after digging the test hole is 0.000708 m3. The weight of the soil obtained from test hole is 1410 g. The soil sample was dries on a tield stone and weighs 1237 g. (a.) Compute the water content (5 points). (b.) Compute the in-place dry unit weight of the tested soil in kN/m3. (5 points) (c.) Determine the percentage of compaction for the test result if the soil is part of a compacted earth fill whose maximum unit weight obtained from the laboratory compaction tests) is 18.57 kN/m3.Q2: The dial readings recorded during a consolidation test at a certain load increment are given below. Determine c, by both the square root of time and log of time methods. The thickness of the sample = 2 cm and the sample is drained both sides. Time Dial Reading Time min Dial Reading cm x 10-4 min cm x 10-4 0 240 15 622 0.10 318 H 30 738 C₁=0.848- 0.25 340 60 842 0.50 360 120 930 1.00 385 240 975 2.00 415 1200 1070 C,=0.197 4.00 464 8.00 530 90 H² tsoGeotechnical Engineering (UPVOTE WILL BE GIVEN. PLEASE ANSWER THE QUESTION CORRECLTY. NO LONG EXPLANATION NEEDED. FOLLOW THE INSTRUCTIONS CAREFULLY.) A moist soil weighed 895 g with a volume of 425 cm3. After drying, the sample weighed 775 g. Of the dried soil, 400 g was poured into a vessel loose state. Its volume subsequently determined to be 275 cm3. That same 400 g was then vibrated and tamped to a volume of 212 cm3 with Gs = 2.71. Determine the designation of the granular soil based on its relative density. (3 decimal places - Do not round off unless it's the final answer)