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Q. What is the minimum prescribed track structure for LWR / CWR on Broad Gauge?
Ans.-
1. General - The minimum length of LWR depends upon -
i. Range of temporary variation.
ii. The section of rail.
iii. Resistance offered by ballast to the longitudinal movement of rail assembly.
2. Formation - Weak formation to be identified and stabilized suitable means cross slope should be 1 in 40. In heavy rainfall areas steeper grades can be provided as prescribed by CE.
3. Ballast - Minimum clean ballast cushion 250 mm for speeds up to 130 KmPH for speeds above 130 KmPH minimum depth of ballast cushion shall be 300 mm or 200 mm clean ballast over 150 mm sub ballast.
Q. Purpose of dowel bars in elastomeric bearing? Elastomeric bearing is generallycategorized into two types: free andfixed. For fixed types bridge deck is permitted only to rot
Example of Bars of Varying Cross Section: In the numerical example under consideration δ = 750 × 300/( π/4) × 200 2 × 60 +750 × 400/(π/4) × 135 2 × 60 + 750 × 200/(π/4)
Nonsymmetrical loading of the snow A decrease in snow weight in some parts of a roof because of the wind, or melting from the heath, or the sun light would reduce internal powe
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Define the term - post-tensioned concret In the Prescon and B.B.R.V. systems button heads are created at the ends of tendons. In the case of Prescon system, 2 to 130 tendon wir
Q. What do you mean by Laying of apron in design of bridge? Width of apron laid on river bed should be 1.5 D1 where D 1 is estimated scour depth in metres below river bed. Thi
Question What is the reason that vibrators not used in concrete compaction in piling works ? Answer Concrete for piles must be a high-slump self-compacting mix that i
What is linear waterway?
Define the term - permanent load Where the permanent load is less than or equal to 25% of the design imposed load, deflections may be calculated using any elastic method. When
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