HYDERABAD: After tackling several hurdles, covering issues of space, location and engineering, the Hyderabad Metro Rail Limited (HMRL) authorities have successfully completed erecting a Metro Rail Over Bridge (ROB) at the narrow and congested Bhoiguda underpass, announced HMRL managing director NVS Reddy after inspecting the ROB.
With the ROB’s completion which falls under Corridor – II (JBS-Falaknuma) of the Hyderabad Metro rail, L&T—the concessionaire for the Metro project has built 8 ROBs in across the city so far.
The entire steel bridge was manufactured in a special factory in Ghaziabad by simulating the site conditions at Bhoiguda. The structure was then dismantled and brought in special containers to the Old Gandhi Hospital premises in Monda Market area of Secunderabad, said authorities.
The entire steel bridge was then reassembled piece by piece, using high strength steel plates and about 51,000 imported HSFG (high strength friction grip) bolts, between Secunderabad West Metrostation (of Corridor – II) and Bhoiguda Road Under Bridge (RUB).
The reassembled steed bridge weighed nearly 960 MT and was slowly pulled using special pulling arrangements provided above the Metro pillar and on top of specially erected steep support structures.
“Due to the curvy nature of the rail track, which takes a sharp left turn over the existing Bhoiguda RUB of Indian Railways, the Metro ROB had to be designed as a very wide steel bridge with a width of 64 ft and a length of 221 ft at a height of about 40 ft over the road level in the shape of a box. Inside this box bridge, a composite deck slab — a mixture of steel and reinforced cement concrete slab is being laid to accommodate two tracks,” said Reddy, on Sunday.
“The main launching operation was successfully completed in less than six hours of “traffic block” given by Indian railways during which train operations were suspended temporarily,” he added.