In the given figure drill holes, heading, mucking and benching are numbered as 1, 2, 3, 4; The correct sequence is:
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Civil Engineering · all questionsTunnel Engineering
Tunnel Engineering
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American method of tunnelling
(i) Is suitable for large sized tunnels
(ii) Is not suitable for railway or highway tunnels
(iii) Requires heavy timbers
(i) Is suitable for large sized tunnels
(ii) Is not suitable for railway or highway tunnels
(iii) Requires heavy timbers
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If ‘D’ is the diameter of tunnel in meters, then the thickness of lining in mm, as per the empirical formula is given by
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As compared to a single free face, if a charge of explosive is placed equidistant from two faces, then the yield
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Assertion A: When rock conditions are favorable, it will not be necessary to take up concrete lining concurrently with the driving operations till the full length of the tunnel has been driven through rock.
Reason R: A tunnel through rock, hard or soft, does not need any concrete lining
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Reason R: A tunnel through rock, hard or soft, does not need any concrete lining
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Assertion A: English method of tunnelling requires more time as compared to other methods of tunnelling.
Reason R: In English method of tunnelling, the masons and excavators have to work alternately
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Reason R: In English method of tunnelling, the masons and excavators have to work alternately
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Drift method of tunneling is used to construct tunnels in
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The following tunnels were constructed in different countries for different purposes:
1.Emperor Claudius built the first Roman tunnel
2.The first highway tunnel was constructed in Hungary
3.The first underground railway tunnel was constructed in Great Britain
4.The first navigational tunnel was constructed in France.
The correct chronological development of these tunnels is:
1.Emperor Claudius built the first Roman tunnel
2.The first highway tunnel was constructed in Hungary
3.The first underground railway tunnel was constructed in Great Britain
4.The first navigational tunnel was constructed in France.
The correct chronological development of these tunnels is:
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Pick up the correct statement from the following during tunnel excavation,
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In case of drift method of tunnelling, the drift may be excavated at
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