The National Capital Region Transport Corporation (NCRTC) has announced that the installation of all six special steel spans for the Delhi section of the Regional Rapid Transit System (RRTS) has been completed successfully.
According to a NCRTC senior official, “These special steel spans have been established to cross the Gazipur Drain and Kondli roundabout from New Ashok Nagar towards Anand Vihar. These steel spans have been installed one after the other, making it the only place on the entire RRTS corridor where such a long viaduct is being constructed with special steel spans.”
Informing about the details of these special steel spans, he said “Special steel spans are massive structures, consisting of beams made of structural steel. NCRTC first manufactures the segments of structural steel in the factory and then laden them onto trailers to bring them to the site during the night to avoid any traffic problems.”
“These parts are then assembled at the site by systematically joining together with the help of a special process. The shape and structure of these steel spans are specially designed to suit all the requirements of construction, installation and usage,” he informed.
“The combined length of these six special steel spans is around 360 meters. RRTS corridor coming from Sarai Kale Khan and moving parallelly towards Gazipur Drain, has now crossed over the drain with the installation of these six steel spans.”
“Out of these six special steel spans, the length of three spans is approximately 70 meters long each with each weighing 540 tonnes and the remaining three are 50 meters long each with each weighing 540 tonnes. These special steel spans are about 14 meters wide.,” he said.
“The installation of the steel span near the Ghazipur drain, which is about 40 to 50 meters wide was a challenging task because it flows diagonal to the alignment of the RRTS corridor. Due to the flowing drain, the deep foundation for the pillars had to be made in the drain,” he stated.
“Moreover, existing structures of Public Works Department (PWD) roads and large Delhi Jal Board (DJB) pipelines created hindrances and high-capacity cranes had to be used for the construction of the foundation,” a senior official claimed.