Delhi Metro launches 200 u-girders within record time of just one month on Noida – greater Noida corridor
The Delhi Metro Rail Corporation (DMRC) has launched a record 200 U-girders (which converts to approximately 2.7 kilometres of twin Metro elevated viaduct) within the month of May on the NOIDA – Greater NOIDA Metro section, thus significantly expediting the progress of construction on the corridor, according to DMRC’s Managing Director, Dr. Mangu Singh.
The feat was achieved this month by DMRC’s engineers in close coordination with the NOIDA Metro Rail Corporation (NMRC) and local district authorities. Six cranes and six trailers were deployed for launching the U-girders on this corridor. This is the maximum number of U-girders ever launched in any Metro corridor in India within a month. Till now, DMRC had achieved a maximum of 110 U-girders in a month on the Faridabad corridor.
The viaduct on the NOIDA – Greater NOIDA section is being constructed by specialised technique of pre-cast pier caps and precast U-girders. These U-girders are being cast at casting yard, mainly one in NOIDA and other in Greater NOIDA. The typical length of U-girders is 27 m & weighs around 160 tons. The main challenge of U girders is precision in casting as well as launching which requires specialised cranes of 350/400 tons capacity to launch these u-girders.
Also, the transportation of U-girders from the casting yards to the site is another challenge because of its length and width. Accordingly, specialised trailers are mobilised for transporting these U-girders and mainly transportation is limited to the night time and at many a times under regulated traffic environment. Escort vehicles are also deployed for transporting these U-girders by road.
U-girders have been primarily used on the Airport line and the Faridabad corridor of DMRC, Kochi Metro and Lucknow Metro. The Managing Director of NMRC, Shri Santosh Yadav IAS during his recent visit on the corridor had also expressed satisfaction over the progress of work and had assured of full support and cooperation for commissioning of this line before the scheduled target of March, 2018.
The work of NOIDA-Greater NOIDA Corridor is being executed by DMRC on behalf of NMRC. The civil works on this corridor consist of 29.7 kilometres of viaduct and 21 stations. Six kilometres of viaduct has been completed already on this corridor in a span of one year since the award of first contract for civil works.