MAHATMA GANDHI INSTITUTE OF TECHNOLOGY
Gandipet, Hyderabad 500 075
DEPARTMENT OF CIVIL ENGINEERING
Geotechnical Engineering – I
Assignment – I
Date of Issue: 19th
Aug, 2013
Last Date for Submission: 26st
Aug, 2013
Answer any Five
Questions with 5,6 & 7 as compulsory
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1.
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Derive
the following relations from fundamentals.
(a)
e in terms of w,G & S
(b) Expression for bulk unit
weight
(c) e in terms of n
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2.
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Describe
the Pycnometer method of determination of water content and for what type of
soils you recommend this method.
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3.
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Write
a brief note the following clay minerals.
(a) Montmorillite (b) Illite (c)
Kaolinite
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4.
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(a) Why do the clay particles possess a
charge on them?
(b) Write a brief note on Electric Double
layer.
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5.
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A
partially saturated soil sample has a natural moisture content of 15% and
bulk unit weight of 1.9gm/cc. The specific gravity of soil solids is 2.7.
Determine the degree of saturation, and void ratio. What will be unit weight
of soil sample on saturation.
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6.
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Determine
the unit weights of soil in the loosest and densest states of 2mm dia sphere
which have a specific gravity of 2.7.
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7.
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A
soil has a bulk unit weight of 18kN/m3 and a water content of 5%.
Calculate the amount of water in litres required to be added to 1m3
of soil to raise the water content to 15%. Assume the void ratio to be same.
Take Gs = 2.6
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8.
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Explain the method
of finding the coefficient of permeability by constant head permeability
test. Discuss the factors influencing the Permeability of soils.
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9.
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Explain
the procedure involved in classification of soil as per Indian Soil
Classification system.
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10.
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Write
a note on
(a) Terzaghi’s Effective
Stress Principle.
(b) Quick Sand
(c) Downward Seepage and
Hydrostatic Condition in soils.
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V.Venkat Ramayya, Faculty of CIVIL
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