GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER-VI (NEW) EXAMINATION - WINTER 2020
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Subject Code:2160603 Date:27/01/2021Subject Name:Railway, Bridge & Tunnel Engineering
Time:02:00 PM TO 04:00 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.
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2. Make suitable assumptions wherever necessary.3. Figures to the right indicate full marks.
Q.1 (a) Discuss about development of Indian railway. 03
(b) Explain the various defects in Bridges. 04
(c) Explain the basic requirements of an ideal alignment. 07
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Q.2 (a) Define: (1) Negative super elevation (ii) Creep of rail (iii) Sleepers 03
(b) Explain the coning of wheels with neat sketch. 04
(c) What is Ballast? Write Function and requirement of good ballast. 07
Q.3 (a) Draw a sketch of turnout and explain its components. 03
(b) Using a sleeper density of n+5, find out the number of sleeper required 04
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for constructing a railway track 900 meters long (B.G. track).(c) Write short note on “Bridge architecture”. 07
Q.4 (a) Which facilities are required at railway station? 03
(b) Draw a sketch of diamond crossing in railways and list the important 04
features.
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(c) State the purposes of bearings in a bridge and explain rocker and roller 07bearings with sketch.
Q.5 (a) Define : (i) Economic span (ii) Afflux (iii) Free board 03
(b) Explain Track Drainage. 04
(c) Write method of erection of steel girder bridges. 07
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Q.6 (a) Define : (i) Scour depth (ii) Linear waterway (iii) HFL 03
(b) List the different types of spikes with sketch and their uses also. 04
(c) Explain the river training works for bridges. 07
Q.7 (a) Define shaft and give advantages of shaft. 03
(b) List the methods of tunnelling in hard rock and explain any one. 04
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(c) Why drainage is necessary in tunnel? Discuss various drainage systems 07for tunnel.
Q.8 (a) Write short notes on “Dust control in tunnel”. 03
(b) List the methods of tunnelling in soft ground and explain any one. 04
(c) Explain various methods of tunnel ventilation. 07
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