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| Alpine attains tunnel breakthrough in New Delhi Metro Alpine, FCC's Austrian subsidiary, has successfully attained final breakthrough of the first section of tunnel linking the city of New Delhi and the airport, under a contract awarded in September 2007. The contract is worth 139.3 million euro. Digging conditions were very difficult, and Alpine used three tunnel boring machines (TBM) in the project. Tunneling work was conducted at depths of 35-45 metres, with a longitudinal gradient of 2.85%. Moreover, the tunnelling site was located directly below New Delhi's major traffic arteries, such as the Minto Railroad Bridge, Connaught Square and Connaught Circle as well as two existing Metro lines, whose continuous operation could not be disrupted. New Delhi's Mass Rapid Transit System is being extended in two phases. The first phase involves building 3.7 kilometres of line and two stations: New Delhi and Shivaji Stadium, each 242 metres long, as well as the adjoining parking garages. The second phase involves building the Airport Link, a line connecting central New Delhi with Indira Gandhi International Airport. The Airport Link will measure approximately 19 kilometres. The line between the main station and airport is to be commissioned on time before the 2010 Commonwealth Games to provide a fast, convenient airport connection and reduce the daily traffic jams on the road. write your comments about the article :: © 2009 Construction News :: home page |