“á û’ û ý ’ ”á” ”á “ ”

EJ – 700

*EJ700*

VIII Semester B.E. (Civil) Degree Examination, January 2013 (Y2K6 Scheme) CE 804 : RAILWAY, HARBOUR AND TUNNEL ENGG. Time : 3 Hours

Max. Marks : 100

Instructions : i) Answer Part A compulsorily, any three from Part B and any one each from Part C and Part D. ii) Assume suitable data if found necessary. PART – A 1. a) The expression for sleeper density for a BG track, if 19 sleepers are used is _____________

1

b) Wheels are coned at a slope of ___________

1

c) Maximum permissible wear on the top of rail is ___________

1

d) Grade compensation for curvature per degree for Broad Gauge track is _______________

1

e) Drift method of tunnelling is used to contstruct tunnel in ____________

1

f) Detrimental forces acting on break waters are __________

1

g) A shop is berthed in a chamber and lifted by the principle of buoyancy. Such a chamber is called _________________

1

h) The choice of shape of tunnel cross section depends upon _____________ factors.

1

i) Draw a typical cross section of apermanent way.

2

j) If the ruling gradient is 1 in 150 on a particular section of Broad Gauge and at the same time a curve of 4 degree is situated on this ruling gradient, the allowable ruling gradient will be ______________

2

k) Draw a sketch of mound break water.

2 P.T.O.

EJ – 700

-2-

*EJ700*

l) Draw a neat diagram of left hand turnout and show its various component parts. m) Draw sketch of Semaphore Signal. n) Draw sketch of Dry Dock.

2 2 2

PART – B 2. a) Describe the functions and requirements of rails in a railway track.

8

b) Discuss the necessity and effects of coning of wheels and tilting of rails.

8

3. a) Discuss the different types of sleepers in use on Indian Railways and state relative merits and demerits of each.

8

b) Compare the different ballast materials with respect to merits, demerits and suitability of each materials as ballast. 4. a) Derive the relationship between super elevation (e), Gauge (G), Speed (V) and radius of the curve (R). b) Calculate the maximum permissible speed on a curve of high speed B.G. track having the following particulars :

8

8

8

i) Degree of the curve = 1° ii) Amount of superelevation = 8.0 cms iii) Length of transition curve = 130 mts. iv) Maximum speed on the section likely to be sanctioned = 153 kmph 5. a) What are the various types of stresses induced in the railway track, explain in brief each of them.

8

b) Calculate the maximum permissible train load that can be pulled by a locomotive having four pairs of driving wheels carrying an axle load of 24 tonnes each. The train has to run at a speed of 80 kmph on a straight level track (BG).

8

*EJ700*

-3-

EJ – 700

6. a) Write explanatory notes on the following : i) Heel clearance or Heel divergence ii) Throw of switch.

8

b) Calculate all the elements required to set out a 1 in 12 turnout taking off from a straight B.G. Track with its curve starting from the toe of the switch, i.e, tangential to the gauge face of the outer main rail and passes through T.N.C. Given that the heel divergence as 11.4 cm.

8

PART – C 7. a) With neat sketches, explain different types of harbours. b) Write a note on classification of docks. Write briefly on the design and layout of dry and wet docks. 8. Define a Breakwater and explain the various types of Breakwater with neat sketches.

8 8 16

PART – D 9. a) What is a Tunnel ? What are the advantages of adopting a Tunnel as a means of communication ?

8

b) Briefly explain any one of the following methods of tunnelling i) Needle beam method ii) Belgian method.

8

10. a) Explain with neat sketch any one of the methods of Tunnelling in hard rock.

8

b) Explain the objectives of providing Tunnel lining and mention the types of lining materials used.

8

———————