The Indian Railway is planning to build the country’s first vertical-lift bridge that will make way for ships and steamers to pass through replacing the 104 year old Pamban bridge connecting Rameswaram and mainland of India.
The more than two-kilometre-long bridge, which is likely to cost Rs 250 crore, will have a 63-metre stretch which will lift up while remaining parallel to the deck to allow access to the ships, the official said. It will be ready in the next four years, and along with the new railway link between Rameswaram in Pamban Island and Dhanuskodi, which is considered the starting point of Ram Setu, will help ferry thousands of pilgrims from the Hindu religious site to the mainland.
The bridge went through the approval for construction by the railways on Monday. A cyclone in 1964 destroyed the rail link between the two sites. This is going to be the first effort, put on to restore the link, the official said.
Ever seen a moving bridge? The Pamban Sea-Bridge that connects Rameshwaram with mainland India will soon have vertical lift span technology to allow the cross-navigation of vessels pic.twitter.com/Z2W8vruokG
— Piyush Goyal (@PiyushGoyal) December 28, 2018
“The existing bridge having a total length of 2,058 m has already served 104 years and needs to be replaced since it is almost non-operational.
“While this bridge has the ‘Scherzer’ rolling lift technology in which the bridge opens up horizontally, to let ships pass through, in the new one, a 63 metre section will lift vertically upwards remaining parallel to the deck. It will be done using sensors at each end,” said another official.
The new bridge will have 100 spans of 18.3m and one navigational span of 63m. It will be three-metre higher than the existing bridge with navigational air clearance of 22 metre above sea level. Because of the vertical lift, full horizontal width of 63m will be available for navigation. The substructure of the bridge will be built for double line and the navigational span will also have provision for double line.
“The entire bridge including navigational span will be designed keeping in mind the railways’ plan of electrification, the official said. “In comparison to existing manual operation and control, the new bridge will have electro-mechanical controlled systems which will be interlocked with train control systems. Many other new technologies like stainless steel reinforcement, composite sleepers and long life painting system to name a few have been considered in planning of the bridge,” he said.