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  The application of Semi-Automatic Tubular Arch inside Boscaccio Tunnel: a new concept of primary lining

  Tunnel excavation is a particularly hazardous activity due to working in confined spaces, in addition uncertain ground conditions and the use of heavy equipment creates additional occupational safety and health hazards for site personnel. One of the most important request of underground construction market is a safety level increase during excavation stage. The risks are well known and this give the possibility to managed them. Semi-Automatic Tubular Steel Arch and EKIP 2104 introduced within the tunneling industry a solution which improved performance, time saving and as a consequence cost saving, with respect to the health and welfare, increasing safety working conditions of the workers. The paper describes the application of this new reinforcing element installed by EKIP 2104 inside Boscaccio Tunnel which mitigates the hazards typical in this work phase. The economic benefit related to time and material saving will be also underlined.

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