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. ...

Casting Yard •Site of any Casting Yard should be easily accessible from all site locations. •Land should be available from 25 Acres to 40 Acres for establishing a casting yard. •Good Environment Conditions. •Approach Road leading to casting Yard should be easily identified •It should be not more than 3 to 4 kms from working site. •Canteen and Proper drinking water facility for Engineers,Supervisors,staff and labours. •Medical Treatment Centre in case of emergency. Casting of Superstructure 1.          Casting of superstructure is not done on site because of various reasons like unavailability of land space for installing the machinery and equipments, difficulty in mobility, overall work efficiency and constructability. 2.        All the casting of superstructure like pier cap, U girders, I Girders, Pi Girders etc is completed there and is transported to the site by trailer trucks for erection once it has gained...