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Q. What is Switch and Expansion Joint?
Switch Expansion, Joint (SEJ) is an expansion joint installed at each end of LWR/CWR to permit expansion/contraction of the adjoining breathing lengths due to temperature variations.
The exact location of SEJ shall be fixed taking into account the location of various obligatory paints such as level crossings, girder bridges, points and crossings gradients, curves and insulated joints. SEJ with straight tongue and stock shall not be located on curves sharper than 0.5 degree (3500 m radius) as far as possible. SEJ shall not be located on transition of curves.
Figures (a) and (b) respectively give details of a simply-supported bridge beam and its (idealised) cross-section. In addition to the dead load of 25 kN/m (including self weight),
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Q. What do you mean by Scour? Whenever a bridge crosses a waterway, even a small or intermittent one, scour is a dangerous effect that can damage bridge piers and undermine fou
Define the Phreatic Line and Phreatic Zone Phreatic Line: In an unconfined aquifer, it represents the water table. Phreatic Zone: In an unconfined aquifer, it is located b
Explain briefly shallow foundation?
systems approach to diagnose and solve the chronic water crisis in the city.
Question While pipe jacking or microtunneling , it is usually accepted that cover depths of jacking pipes cannot be also shallow as in less than 2D where D is the diameter o
Determine the term - Final Tension The tension in tendons after losses of prestress have taken place is called as final tension. Final tension is taken to be corresponding to
Explain Situations that warrant a damage inspection? - Floods - bridges located in streams, rivers and other waterways with known or suspected scour potential. - Build-up of
Lubrication of rail joints is one of the important items of permanent way works incidental to systematic track maintenance, the lubrication of joints is done for the following purp
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