A fraction of the T-49 tunnel after it used to be linked by the engineers of Indian Railways.
The Indian Railways successfully accomplished the road and stage step forward of the 12.758 kilometre lengthy T-49 tunnel in Jammu and Kashmir. The distinguished milestone used to be accomplished on Tuesday, instructed the Northern Railway, which linked the 2 ends of the tunnel between Sumber and Arpinchala stations of Katra-Banihal fragment of Udhampur-Srinagar-Baramulla Rail Link (USBRL) mission.
INDIA’S LONGEST TRANSPORTATION TUNNEL MADE THROUGH
This present day a chief milestone has been accomplished by executing destroy-thru of Tunnel T-49 between Sumber and Arpinchala Stations on on-going Katra-Banihal Share.#Infra4Indiapic.twitter.com/lHJVnoy6zu
— Northern Railway (@RailwayNorthern) February 15, 2022
T-49 goes to be the longest tunnel of Indian Railways, surpassing Gaze Panjal Tunnel of 11.2 km length constructed by USBRL on the Banihal-Qazigund fragment, the Northern Railway said on Twitter.
Listed below are key things to perceive about T-49:
- The south portal of the tunnel is located at an altitude of 1400 metres, whereas its north portal is located at an altitude of 1600 metres.
- The T-49 tunnel has been constructed the use of the Modern Austrian Tunneling Design (NATM), a up to date technique of drill and blast technique. The Northern Railway said that the unpleasant fragment profile of the tunnel is modified horseshoe-fashioned.
- The NATM is also identified because the sequential excavation technique (SEM). It uses the capacity of the encircling soil to the finest extent attainable to toughen the tunnel constructing. The NATM promotes fixed monitoring.
- Being an SEM, the operation occurs sequentially to expend most revenue of the ground conditions.
- T-49 tunnel has two tubes – one is the principle tunnel and other being destroy out tunnel. As per international requirements, the destroy out tunnel being constructed parallel to the principle tunnel is linked by unpleasant passages at an interval of 375m to facilitate rescue and restoration work.
- The tunnel has a ruling gradient 1 in 80 and designed budge of 100 kmph.
- The Northern Railway said that within the future of constructing actions, local population used to be employed by agencies for various works.
- Out of 272 km length of USBRL mission, 161 kilometres has already been commissioned and operationalised.
- The work of the intervening stretch of 111 kilometre between Katra Banihal is below progress at speedily budge, the railways said.
- It added that a number of challenges were encountered within the future of constructing similar to shear zone, perched aquifer, and highly jointed rock mass, rock complications of compacting and excessive ingress of water.