Dr. A.P.J. Abdul Kalam University BE VI SEM (CE) Geotechnical Engineering-I [CE-602] June 2021 Question Paper

Dr. A.P.J. Abdul Kalam University

Bachelor of Engineering

Sixth Semester Examination, June-2021

Geotechnical Engineering-I [CE-602]

Branch-Civil

Time: 3:00 Hrs Max Marks 70

Note: (i) Attempt any five questions. All question carry equal marks.

(ii) Assume suitable data necessary and state them clearly.

Q.1 (a) Explain the classification system based on particle size and consistency

limits of soils.

(b) Explain “Sand replacement method” of field density determination.

Q.2 (a) Derive the relation between degree of saturation, void ratio, water4

content and specific gravity of soil particles

(b) Derive relation between void Ratio and porosity

Q.3 (a) A soil has liquid limit and plastic limit of 47% and 33% respectively. If

the volumetric shrinkage at the liquid limit and plastic limit are 44% and

29%. Determine the shrinkage limits

(b) Classify coarse and fine grained soil as per Indian standard

Q.4 (a) Define flow index and toughness index

(b) A partially saturated sample from a borrow pit as a natural moisture

content of 15% and bulk unit weight of 1.9 gram/cc. The specific gravity of

solids is 2.70. Determine the degree of saturation and void ratio. What will

be the unit weight of sample of saturation?

Q.5 (a) Explain the underline theory shrinkage limit of determination and explain

methods to perform grain size analysis

(b) Define consistency, sensitivity of clay, stokes law and hydrometer

analysis

Q.6 (a) A Sand specimen 40 square centimetre in area and 15 centimetres long is

tested in a constant head permeameter under a head of 40centimtre.

Discharge collected in 10 minutes was 200cc. porosity of the sand specimen

was 35%. Compute permeability. Discharge velocity and seepage velocity.

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(b) What is Darcy‟s law?/ What are its limitations and also define its validity

Q.7 (a) What is quick sand condition and define seepage pressure and critical

hydraulic gradient

(b) How to determine „Coefficient of consolidation‟ by logarithm of time

fitting method

(c) Draw failure Mohr‟s envelope for specimens total stress tested under

consolidated drained condition

Q.8 Write short on

(a) Tri-axial compression test

(b) Effective stresses

(c) Reinforced earth retaining wall

(d) Flow net

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