Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Chapter 17, Problem 17.2P
To determine
Find the area ratio for each case and determine the suitability for each sampler for the given soil characterization tests.
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Students have asked these similar questions
The table below shows the results of CU test for a soil sample (h=76 mm, and D=
38 mm), Find the X value, if you know the decrease in VO=2.5 % in consolidation
stage.
Shearing stage (ho=75 mm)
Axial dial gauge reading
(F=0.01 mm/div.)
Corrected area
mm
30
75
120
no one
O 1133 mm2
1105 mm2
O 1110 mm2
O 1176 mm2
The table shows the laboratory result of the sieve analysis of the sample. Determine the
percent finer at size 0.74 and 0.004. Determine also the soil classification using AASHTO.
Weight
Retained
18.96
Size (mm)
0.25
0.149
0.074
0.052
0.02
33.18
45.03
54.51
42.66
0.01
11.85
0.004
0.001
Pan
4.74
4.74
21.33
• Problem 4-
A soil sample from a certain excavation has
the following grain size characteristics;
Sieve size (mm)
2.00
0.075
0.500
0.005
0.002
% Finer
100
80
64
35
20
The group index of the soil was 17 and has a plasticity
index of 24. Determine the liquid limit of the soil. GI =
(F-35) [0.2 +0.005(LL-40)] +0.01 (F-15) (P.I. - 10)
Chapter 17 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
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- During a subsurface exploration, an undisturbed soil sample was collected in the field using a split-spoon sampler.collected in the field using a split-spoon sampler for laboratory evaluation.sampler) for laboratory evaluation. The sample has a diameter of 1.375in. diameter, 18 in. length, and a wet weight of 1.85 lb. If the oven-dried weight was1.5 lb and Gs = 2.74; calculate the following:(a) Wet unit weight.b) Moisture content.c) Dry unit weight.d) Void ratio.e) Degree of saturation. Translated with www.DeepL.com/Translator (free version)arrow_forwardConsider that a 58.7 gram sample of dry soil is used in making a mechanical analysis by using the hydrometer method. The laboratory was held at a constant temperature of 20 C (68 F). The 40 s hydrometer reading was found to be 32.5 and the 8 hr hydrometer reading was 15.5. The percentage of sand in this soil sample is (note, a 58.7 gram sample is used here): Your Answer: Answer unitsarrow_forwardThe following data represent the results obtained from the specific gravity (S.G.) test performed in a soil laboratory including twenty sand samples. The value of mode is 2.65. * Specific Gravity Number of Samples 2.30-2.39 1 2.40-2.49 2.50-2.59 2.60-2.69 2.70-2.79 2.80-2.89 1 47arrow_forward
- Sand-cone equipment is used to determine an in-place unit weight (field density test) on a compacted earth fill. The sand used in the cone is known to have a bulk density of 15.73 kN/m3 Wet weight of soil sample dug from test hole = 2100 g Dried weight of soil sample = 1827 g Weight of sand (sand core) to fill the test hole = 1636 g a) Compute the water content. b) Compute the in-place dry unit weight of tested soil. c) Compute the percentage of compaction of the tested soil if the laboratory moisture-unti weight curve indicates a dry unit weight of 18.09 kN/m3 and a optimum moisture content of 13%.arrow_forward(c) (ii) A soil sampler has following dimensions: Inside diameter of cutting edge = 69 mm Outside diameter of cutting edge = 73 mm Inside diameter of sampling tube = 70 mm Outside diameter of sampling tube = 72 mm Compute: (i) Inside clearance (ii) Outside clearance (iii) Area ratioarrow_forwardFrom 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)arrow_forward
- 2b. The following data was obtained from Sieve Analysis conducted at a Soil Lab. Using the data given in Table 02 determine: Table 02: Sieve analysis data of coarse-grained soil i. ii. iii. + Sieve Opening (mm) 20 10 4.75 2.36 1.18 0.6 0.3 0.15 0.075 Pan Mass of Soil Retaining on each Sieve (g) 5.21 20.21 180.21 360.21 280.11 70.11 50.21 17.21 10.11 8 Percentage of clay, silt, sand and Gravel in the soil sample Uniformity coefficient and coefficient of curvature Classify the soil according to BS soil classification systemarrow_forwardFUNDAMENTALS OF GEOTECHNICAL ANALYSIS A constant head permeability test is performed on soil that is 2 cm x 2 cm square, 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. Provide step by step solution. a) Compute the permeability based on these test conditions and results. b) A 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?arrow_forward(b) Classification tests for the determination of the particle size distribution of a soil produced the following results: Particle Size % finer (mm) 99 2.36 80 1.3 63 0.6 33 0.2 10 0.075 3 0.02 Then using cone penetrometer for Liquid Limit test, the results were recorded as follows. Cone penetration 15.9 17.7 19.1 20.3 22.5 (mm) Water 32.6 42.9 51.6 59.8 66.2 content (%) While the plastic limit test conducted for the same soil recorded as below:- Test No. 1 2 3 Wet soil 10.01 11.23 9.72 Dry soil 8.02 9.01 7.72 SKAA 1713 4 i) Plot the grain size distribution curve on the log graph that has been provided (Figure 2b). Calculate the uniformity coefficient, Cu and the coefficient of gradation, C, for the soil sample. Determine the plastic limit, the liquid limit and the plasticity index of the soil. Plot the graph to help you obtain the results (if necessary). ii) iii)arrow_forward
- 268 TNT 98 5:21 B/s SITUATION 2 In an experiment of determining the porosity and specific gravity of solids of a soil, a soil is dug out from the ground, weighed, then oven dried, and then saturated with water. The weight of the soil taken from the test hole is 1346 grams. It was then oven dried and weighed 1076 grams. After saturating it with water, it weighed 1462 grams. The volume of the test hole was then measured and found to be 792 сс. Determine the void ratio (in percentage) of the soil sample. Your answer SITUATION 3 A sample of clay soil of volume 1/1000 cubic meter and mass of 1.762 kg, after being dried out in an oven had a mass of 1.368 kg. The specific gravity of the particles was 2.69. Calculate the void ratio. Your answer Find the volume of air in the oriqinal sample. Your answerarrow_forwardA liquid limit test on a clay was performed with the following results. The natural water content of the clay is 38% and plastic limit is 21%. Number of Blows 6 12 20 28 32 Water content (%) 52.5 47.1 42.3 38.6 37.5 What is the liquid limit of this clay? (Use Interpolation) Group of answer choices 39.85% 39.99% 36.74% 38.63% Please answer this asap for upvote. Thanksarrow_forwardAn SPT was carried out on a fine soil sample and the following blow-count data was obtained in increments of 6 inches: 5, 4, 6. , what will be the right designation for this soil? ) Medium (Firm) Stiff Loose O Compact During the process of drilling boreholes, the following tasks should be considered: Field logging, Moisture content test, Sample collection Field logging, In situ testing, Sample collection Sample collection, SPT test, Unconfined compression test Field logging, In situ testing, Sample collection, Moisture content test What is Median particle size in PARTICLE SIZE DISTRIBUTION CURVE? D50 in mm D30 in % O D10 in mm O Average of the diameter of the coarse fraction particlesarrow_forward
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