GTE-I Assignment -1

MAHATMA GANDHI INSTITUTE OF TECHNOLOGY

Gandipet, Hyderabad 500 075

DEPARTMENT OF CIVIL ENGINEERING

Geotechnical Engineering – I

Assignment – I

Date of Issue: 9^th Aug, 2012

Last Date for Submission: 21^st Aug, 2012

Roll No 10261A101 to 102612A0136

1.	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
2.	Describe the Pycnometer method of determination of water content and for what type of soils you recommend this method.
3.	Write a brief note the following clay minerals. (a)   (a) Montmorillite (b) Illite (c) Kaolinite
4.	(a)    Why do the clay particles possess a charge on them? (b)    Write a brief note on Electric Double layer.
5.	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.
6.	Determine the unit weights of soil in the loosest and densest states of 2mm dia sphere which have a specific gravity of 2.7.
7.	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
8.	(a)   Explain the method of finding the coefficient of permeability by constant head permeability test. (b)   Discuss the factors influencing the Permeability of soils.
9.	Explain the procedure involved in classification of soil as per Indian Soil Classification system.
10.	Write a note on Effective Stress Principle.

MAHATMA GANDHI INSTITUTE OF TECHNOLOGY

Gandipet, Hyderabad 500 075

DEPARTMENT OF CIVIL ENGINEERING

Geotechnical Engineering – I

Assignment – I

Date of Issue: 9^th Aug, 2012

Last Date for Submission: 21^st Aug, 2012

Roll No 10261A137 to 10261A0160 & 11265A0101 – 11265A0112

1.	Derive the following relationships (a) n in terms of e  (b) expression for saturated unit weight (c) expression for submerged unit weight
2.	Explain the Oven drying method of determination of water content.
3.	Explain the method of determination of Specific Gravity of Soil solids.
4.	Write a brief note the following clay minerals. (a)   Montmorillite (b) Illite (c) Kaolinite
5.	(a)    Why do the clay particles possess a charge on them. (b)    Write a brief note on Electric Double layer.\
6.	A clay sample originaly at 25mm thick and at a void ratio 1.12 was subjected to a compressive load. After the clay sample was completely consolidated its thickness was found to be 24mm. Compute the final void ratio.
7.	Write a note on the following with neat graphs. (a)   Well graded soils (b)   Poorly graded soils (c)   Gap graded soils
8.	What are Atterberg limits and how will you arrive at these limits.
9.	Explain the method of finding the coefficient of permeability by falling head permeability test.
10.	(a)   Distinguish between superficial and seepage velocities and state the relation between them. (b)   Enumerate on the factors which influence the permeability in soils.