India has launched the construction of its longest railway tunnel on a 111-km-long track in the northeastern state of Manipur.
On July 30, Indian Railway Minister Suresh Prabhu laid the foundation stone for tunnel number 12 on the Jiribam-Tupul-Imphal train track, which comprises 37 tunnels in total.
The railway line will not only connect Imphal to the rest of the country, but also open up new vistas for economic development of the region.
The 111-km-long Jiribam-Tupul-Imphal new broad gauge railway project was taken up in 2008 and was soon declared as a National Project.
Apart from the longest tunnel in Indian Railway, the stretch also has the tallest bridge in the world that is being constructed over Iring river with a pier height of 141 meters.
Rock anchor system is a very important and popular anchoring system in railway tunnel support. It can be easily and efficiently installed in the job sites with weak rock, loose soil, weathered layer, sand with stone layer and complex formation which is hard to make holes. Rock anchor integrates drilling, grouting and anchoring in one simple operation. The unconsolidated ground condition favors the rock anchorinng technique in tunnel projects due to its fast and easy installation and grouting compared to the traditional method.