Shubham Bhargava's Blogs

ERECTION OF SUPERSTRUCTURE ●       Erection is done during night because road traffic is less and space required is available. ●       Care should be taken that work is done at least 6 m away from of electric wires and poles. ●       There should not be any traffic or anything prone to damage within swing area. ●       Cranes are used to lift and place the structure. One crane is used for erecting pier cap and two cranes for erecting U Girder ●       Location of crane is decided upon following factors : ○       Size and weight of superstructure. ○       Area available free from utilities. ○       Boom length and boom angle as decided by engineer. ○       Swing Area. ○       Location of trailer truck. ●   ...

                                          Girder ●       Girder is the superstructure of viaduct on which the rail tracks are laid and train runs. ●       It rests on the piers, one at each end. ●       Since we have two tracks, each pier supports four U girders (two on each side) ●       U girder weighs around 140 Tons and is 25 m long. There are 3 bed in the Casting Yard for both U girders and pier cap – • Caging Bed • Casting Bed • Curing Bed Each Bed is Capable of Making four Girders simultaneously in a row. Methodology : 1.     Four Cages are fixed at the Cage Bed. 2.     Cleaning And Oiling of Mould/Shuttering of Casting bed is done. 3.     Lifting Of Cage and Shifting to Casting Bed is done. 4. ...

                                Pier Construction :           Pier is a substructure of viaduct that is supported by closely spaced piles and transfers all the loads from superstructure to ground through pile foundation.           Two types of piers are used in the project : 1.     Station pier (square)           Dimensions being 2400 mm x 2000mm. 2.     Eccentric pier (viaduct)           Diameter of eccentric pier is around 1.8m. Methodology : 1.     Vertical Reinforcement are aligned and supported with concrete blocks. 2.     Other reinforcements like rings and link rods are then tied according to design and bar bending schedule. 3.  ...