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  Design and construction tunnels new lines 3 and 6 Metro de Santiago

  Metro de Santiago is developing the most ambitious project in his history, the new lines 3 and 6, which will be completely underground and connecting peripheral of the city through emblematic areas of Santiago (Chile). Two lines together totaling more than 37 km long with a total of 27 stations and 1 station common to both lines. For the tunnels engineering project of these new lines, Metro hired two consortia, who were simultaneously developing their projects, with their own design criteria and experience. In this paper the main aspects of tunnel design of this project are addressed from the first stage of engineering to the current stage of construction.

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