GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- V (New) EXAMINATION - WINTER 2019
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Subject Code: 2154003
Subject Name: Geotechnical Engineering - 1
Time: 10:30 AM TO 01:00 PM
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
- Semi-log papers & Arithmetic graph papers can be requested from the invigilator.
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| Q.1 (a) Discuss three phases system of soil. Explain with neat sketch. (b) Derive: e = n / (1-n) --- Content provided by FirstRanker.com --- (c) Summarize the Scope and limitation of geo-technical engineering in civil engineering. Q.2 (a) Define: Water Content, Bulk Density, Dry Density (b) For a soil sample, particle size distribution curve was obtained and value of D10=0.145, D30=0.47, D60=1.5. Classify the soil. (c) For following results, plot particle size distribution curve and classify the soil. Total weight of soil sample =500 g --- Content provided by FirstRanker.com ---
OR Q.3 (a) Describe any test to obtain specific gravity of soil with sketch. (b) Define: Liquid limit, Plastic Limit & Shrinkage Limit (c) Discuss the uses of Consistency limits. Q.3 (a) Explain liquid limit test for soil by Casagrande method. --- Content provided by FirstRanker.com --- OR (b) Draw a neat sketch for the consistency limits as proposed by Atterberg. (c) Define: Toughness Index, Plasticity Index, Shrinkage Index, Liquidity Index, Sensitivity (Any 4) Illustrate liquid limit test for soil by Cone penetrometer method. --- Content provided by FirstRanker.com --- (b) In a falling head permeability test on a sample 18 cm high and 44 cm² in cross sectional area, the water level in a standpipe of 6.25 mm internal diameter dropped from a height of 70 cm to 28 cm in 10 minutes. Determine the coefficient of permeability. (c) Explain the most suitable test to determine Permeability of Sandy soil in laboratory. OR Q.4 (a) What are the applications of Flow net? (b) State Darcy’s law. What are the assumptions made in Darcy’s law? --- Content provided by FirstRanker.com --- (c) Discuss the different factors affecting permeability of soil. Q.5 (a) Enlist the various factors affecting compaction. (b) What are the differences between compaction and consolidation? (c) Explain Mohr strength theory and Mohr-coulomb’s strength theory. OR --- Content provided by FirstRanker.com --- Q.5 (a) What is Consolidation? (b) Compare Light compaction and Heavy compaction Test of soil. (c) Explain Standard Proctor Test as per IS 2720 (Part 7), 1980. | Date: 25/11/2019 --- Content provided by FirstRanker.com --- Total Marks: 70 MARKS 03 04 07 --- Content provided by FirstRanker.com --- 03 04 07 07 03 --- Content provided by FirstRanker.com --- 04 07 03 04 07 --- Content provided by FirstRanker.com --- 04 07 03 04 07 --- Content provided by FirstRanker.com --- 03 04 07 |
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