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Abstract: ABSTRACT: The extension of Line 1 of Algiers Metro (El Harrach Center - Houari Boumediene International Airport) is the first project in Algeria with a large diameter TBM. This project will connect the new airport with downtown. COSIDER Travaux Public awarded to SELI Overseas the TBM excavation project in early 2018. An EPB TBM built by CREG-WIRTH will excavate the tunnel. Boring diameter is...