Nagpur: The day after the collapse of The Pardi Flyover segment between Kalamna and HB Town, the team member of One Member Alok Kumar, NHAI member (Administration), launched the probe into the incident.
On Tuesday night, a 30 meter segment of the superstructure, said about 1,000 tons, collapsed, raised a question mark for the quality of the work.
National Highway Authority (NHAI) is a quiet official of Kumar’s visit.
“The high-level technical expert committee will investigate the incidents and necessary steps will be taken after submitting the report by the Committee,” Nhai said stated.
The work of Pardi Flyover is being executed by the joint venture of Gannon Dunkerley & Company Limited (GDCL) and the city-based SMS infrastructure Limited.
The superstructure of the flyover sneaks from the P7 dock and falls to the ground.
The other tip of the segment is still on Pier P8.
The lateral upward movement is found to the P8 dock.
Nhai officials said the reason for this failure was not clear at this time point.
The main facie, it seems that bearings under the segment have failed.
However, the exact reason will be found after a detailed investigation by the Technical Committee.
When the accident occurred, there was no work done on the flyover.
Because of the collapse, the adjacent P8-P9 box also moved the longitudinal from the center of the base to P10.
There is no damage seen in the adjacent range on both sides.
Officials say gradients between P7-P8 docks (30 meters range) are concrete M55 classes used for superstructure and pedestal.
The segment between the P7-P8 was launched on January 20, 2018, and was set on April 13, 2018.
Nhai said, “All tests at the time of erection have been carried out by leisure authority engineers, Mumbai.
Bearings are produced by engineering & maintenance companies Private Limited (Metco) And the HT Strand used from Usha Martin.
“Source said Ramakant Ingle, a VNIT professor with the Applied Mechanics Department, also visited a place to check the causes of collapse.
The source said the VNIT team was different from the NHAI’s view of the bearing theory.
It feels like seeing a collapsed superstructure, the concrete looks right.
So large structures generally don’t fall due to bearing errors.
How he slips need to be learned, which requires more time, they said.
VNIT experts feel it may be the first collapse that requires non-destructive testing (NDT), which involves the process of checking, testing and evaluating materials and components.
VNIT will state all the remaining structures to avoid more incidents like that.
The source said the collapsed structure was wasted now and had to be replaced.
One of the theories that did the round was that Gannon Dunkerley & Company, who claimed to be the best in bridge construction, cut the bearing lock, which caused slipping from the superstructure.
GDCK officials in Mumbai promised to answer Ti’s question but did not respond to the archiving of this report.