Rajiv Gandhi Proudyogiki Vishwavidyalaya 2008 B.E Civil Engineering Geotechnical engineering - Question Paper

Geotechnical engineering paper

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lota! No. of Questions : 8 j [ Total No. of Printed Pages : 2

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Roll No.

CE-704

H E. (Seventh Semester) EXAMINATION, June, 2008 (Civil Engg. Branch)

GEOTECHNICAL ENGINEERING-1

(CE704)

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Time: Three Hours Maximum Marks : 100 Minimum Pass Marks : 35

Note r Attempt any five questions. All questions carry equal

marks.

1.    (a) Explain the scope of soil mechanics in civil engg.

constructions.

(b) What is the role of clay minerals in soil behaviour ?

2.    (a) What is the importance of soil classification ? Give its

requirement also. \(j (b) What are the factors affecting permeability ?

3.    (a) What is seepage pressure ? Give the inter-relationship '

between effective, neutral and total pressure.

(b) Explain the theory of one-dimensional consolidation. 3

'U'} What is pressure, bulb ? Describe the contact pressure distribution and Its variation for different types of soils, (b) 'vmer is flowing at the rate of 0 05 ml/sec in an v:ywa:d direct bn tbro%b u fine sand sample whose

p T. O.

coefficient of permeability is 2 X 10 ³ cm/sec. The sample thickness is 12 cm and cross sectional area is 50 cm². Find the effective pressure at the middle and bottom sections of the sample, if the saturated unit weight of sand is 19-4kN/m³.

5.    (a) What is shear strength ? Describe the Mohr-Coulomb

theory ? 0 H'l

(b) Give the advantages and disadvantages of Direct Shear Test.    '1

(Co 3> -

6.    (a) What are the infinite and finite slopes ? Give examples

and explain the stability number,

(b) How the stability of earth dam is checked ? q / T

1. (a) What is coefficient of earth pressure at rest ?

(b) Describe the Oilmans graphical method for active pressure.

8. Write short notes on any five of the following :

(i)    Soil structure

(ii)    Density index }

(iii)    Liquefaction

(iv)    Sensitivity

(v)    Capillary pressure

(vi)    Secondary consolidation

(vii)    Types of failure of slopes

(viii)    Reinforced earth

CE-704

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