Ghaziabad, India (Urban Transport News): The National Capital Region Transport Corporation (NCRTC) has successfully completed the installation of the first special steel span of the Delhi-Ghaziabad-Meerut RRTS corridor at the main line Indian Railway crossing near Vasundhara, Ghaziabad. This special steel span is 73 meters long and weighs about 850 tons. It is installed on piers of height about 10 meters on either side of the tracks of Indian Railways by using pulley and roller arrangement.
With the successful installation of this special steel span, another milestone has been achieved in the construction of India’s first RRTS corridor between Delhi to Meerut. This is the first special steel span of the priority section of 17 km from Sahibabad to Duhai, which is targeted to be commissioned by the year 2023.
There is another special steel span of about 150 meters running just before the Ghaziabad RRTS station, where the RRTS viaduct under construction is simultaneously crossing a road flyover and Delhi Metro viaduct.
NCRTC with full cooperation of Northern Railway has completed the installation of this special steel span with all safety measures. The entire movement of this special steel span on Indian Railways tracks was completed within specified blocks with minimum disruption.
In the installation process of this massive special steel span, first the entire steel structure is fabricated near the actual location on the trestle which is a structure consisting of beams. After the entire structure is ready, it is to be carried on rollers to the piers erected on both sides. This is a very challenging and complex process considering the high load of the steel structure.
These special steel spans are so fine-constructed that they do not require any post-finishing installation. After this installation, the next stage of track laying and OHE installation can be completed immediately.
For construction of elevated viaduct of RRTS corridor, NCRTC is generally erecting piers at an average distance of 34 metres. Thereafter, these piers are connected to the pre-cast segment with the help of launching gantry (tarini) to form RRTS viaduct span. However, in some complex areas where the corridor is destined to cross rivers, bridges, rail crossings, metro corridors, expressways, or other such existing infrastructure, it is not practically possible to maintain this distance between piers.
Special spans are being used to connect piers in such areas. Special spans are massive civil structures consisting of beams made of structural steel. NCRTC is manufacturing special spans made of structural steel in a factory, which are transported to the site on trailers during night and assembled systematically with the help of special process to avoid any traffic problem. The shape and structure of these steel spans are aesthetically designed in advance to suit the overall requirements of construction, installation and usage.
More than 14,000 workers and 1100 engineers are working tirelessly on the 82 km long RRTS corridor, where more than 1100 piers of elevated section have been built, more than 50 km of foundation work and about 14 km of viaduct have been completed, of which Most of which is located in the Preferences section.
With the construction of the viaduct in the priority section, the construction work of all the five stations Sahibabad, Ghaziabad, Guldhar, Duhai and Duhai depot is in advanced stages. The work of connecting rail tracks on the bridge between Ghaziabad and Duhai is going on.
The team of NCRTC is working round the clock with 18 launching gantry (Tarini) for the elevated section in the corridor. Where Tunnel Boring Machine Launching Shaft is being constructed, the construction work of underground section has also started.
NCRTC has managed the pace of construction by taking comprehensive pollution control measures in and around the construction sites. A dedicated team of experts is regularly monitoring the effectiveness of these measures and intensifying the activities wherever necessary. The construction work is being done in the barricading zones of sufficient height and thorough cleanliness is being taken care of at these sites. Anti-smog guns, water sprinklers have been installed for disposal of construction dust. All the raw materials, debris are kept covered at their marked sites.