o' (deg) = 26° + 10D, + 0.4C, + 1.6 log (D50) (2.87) where D, = relative density (fraction) Cu = uniformity coefficient D50 = mean grain size, in mm (i.e., the diameter through which 50% of the soil passes) Teferra (1975) suggested the following empirical correlation based on a large data base. 1 $'(deg) = tan ae+b

o' (deg) = 26° + 10D, + 0.4C, + 1.6 log (D50) (2.87) where D, = relative density (fraction) Cu = uniformity coefficient D50 = mean grain size, in mm (i.e., the diameter through which 50% of the soil passes) Teferra (1975) suggested the following empirical correlation based on a large data base. 1 $'(deg) = tan ae+b

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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II. The grain size curve for soil sample is shown. 100 90 80 70 60 50 40 30 20 10 0 10 4. 5. 6. 1 Particle Size, mm. What is the effective grain size of the soil? What is the value of D60? 0.1 What is the value of the Coefficient of Gradation? 7. What is the value of the Coefficient of Uniformity? 8. What is the value of the Sorting Coefficient? Percent Finer, % 0.01
5. The following information is obtained from a sieve analysis to determine the range of particle sizes in a granular soil sample. Sieve Size Sieve Opening (4.76) Percent Finer#4 4.76 96#10 2.00 80#20 0.84 51#40 0.42 38#60 0.25 25#100 0.149 12#200 0.074 5 Present the information as grain-size curve on semi-logarithmic coordinates of percent finer against particle size diameter. From the plot, determine the uniformity coefficient Cu.
a. determine the effective size D10 b. determine the coefficient of curvature A sample of dry coarse-grained material was taken through a layer of sieves and the following results were obtained. Make the necessary calculations and draw the particle distribution curve. Mass of soil Sieve No. Opening (mm) retained (g) 4 4.75 10 2.00 40 20 0.85 60 40 0.425 89 60 0.250 140 80 0.180 122 100 0.150 210 200 0.075 56 Pan 12
The grain size curve for soil sample is shown. 100 90 80 70 60 50 40 30 20 10 10 0.1 0.01 Particle Size, mm. What is the effective grain size of the soil? Percent Finer,
Given below is the result of a sieve analysis done on a soil sample.Sieve No. Diameter Percent Passing %4 4.750 9510 2.000 8220 0.850 7340 0.425 5360 0.250 23100 0.150 14200 0.075 7Pan --- 0Determine the value of the coefficient of uniformity
1. From the given soil samples below, (a) compute the effective size, uniformity coefficient, and coefficient of gradation (b) Determine the percent of gravel, sand, silt and clay of soil A using AASHTO Sieve size. 0.425 0.033 0.018 0.01 0.0062 0.0035 0.0018 0.001 Soil A Passing Finer (%) 100 90 80 70 60 50 40 35
. Given: H1 = Poisson's ratio of soil sample 1 Hz = Poisson's ratio of soil sample 2 coefficient of earth pressure at rest %3D %3D k1 for soil sample 1 k2 = coefficient of earth pressure at rest for soil sample 2 If H/42 then the value of k;/k2 will be %3D %3D = 1.5 and (1-µj)/(1-µ2) = 0.875, %3D %3D
The following are the results of a sieve and hydrometer analysis. Analysis Sieve number/grain size Percent finer Sieve 40 100 80 97 170 92 200 90 Hydrometer 0.04 mm 74 0.015 mm 42 0.008 mm 27 0.004 mm 17 0.002 mm 11 a. Draw the grain-size distribution curve. b. Determine the percentages of gravel, sand, silt and clay according to the MIT system. c. Repeat Part b according to the USDA system. d. Repeat Part b according to the AASHTO system.
One of the standard methods of measuring specific gravity of solids uses a pycnometer. The pycnometer is first filled with water then it is refilled with a known mass of dry soil plus water so that the volume is the same as before. Using this method on a certain soil sample, the following data were obtained: -Mass of moist soil = 81.811 g -Moisture content = 11.166% -Mass of pycnometer plus water = 327.199 g Then mass of soil and water refilled so that the volume is the same as before. -Mass of pycnometer + soil + water = 373.161 g -Volume of pycnometer = 250 ml DETERMINE THE FF AND SHOW COMPLETE SOLUTION 1. Compute the specific gravity of this soil. 2. Compute the degree of saturation if the void ratio is 0.5416 3. Compute the air void ratio of the soil. (air void ratio is the ratio of volume of air voids to the total volume)
Given below is the result of a sieve analysis done on a soil sample. Sieve No. Diameter Percent Passing % 4 4.750 95 10 2.000 82 20 0.850 65 40 0.425 36 60 0.250 22 100 0.150 14 200 0.075 5 Pan --- 0 Determine the value of the coefficient of uniformity.
5. The following information is obtained from a sieve analysis to determine the range of particle sizes in a granular soil sample. Sieve Size Sieve Opening (4.76) Percent Finer # 4 4.76 96 #10 2.00 80 #20 0.84 51 # 40 0.42 38 #60 0.25 25 #100 0.149 12 #200 0.074 Present the information as grain-size curve on semi-logarithmic coordinates of percent finer against particle size diameter. From the plot, determine the uniformity coefficient Cu.
U.S Sieve No Opening (mm) Mass of soil retained (g) 4 4.75 28 10 2.00 42 20 0.85 48 40 0.425 128 60 0.250 221 100 0.150 86 200 0.075 40 Pan 24 Determine the percent finer than each sieve and plot a grain-size distribution curve. Determine D10, D30, and D60 from the grain-size distribution curve. Calculate the uniformity coefficient, Cu. Calculate the coefficient of gradation, Cc. Classify the soil by AASHTO and USCS system. (LL = 30, PL = 10)