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Metro de Santiago, Linea 2 South Extension, Lo Ovalle to La Cisterna
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| Service: | NATM design support services and on-site monitoring.
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| Estimated cost: | Commencement: | January 30, 2001
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Completion date: | December 30, 2004
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| Location: | Av. Libertador Bernardo O'Higgins 1414 Santiago Chile |
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| Technical data: | 2.5 km Dual Track Running Tunnels and two Stations with a maximum span of 16.2 m. Excavation of 60-65 m² running tunnel in combined top heading/bench with a subsequent invert excavation. Reinforcement consists of lattice griders and welded wire fabric for initial lining and welded wire fabric for final shotcrete lining. |
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| Geology description: | Ripio de Santiago (quaternary conglomerate) consists of a stable matrix of smooth rounded rocks held by bonding fines. Due to earthquake activity it gained compaction and interlocking. |
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| Bid cost: | Final cost: | $29.6 million USD
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Description
The Santiago Metro network comprises five lines. The Linea 2 South extension included 2.5km dual track running tunnels and two stations with a maximum span of 16.2m. Further, an excavation of 60-65m2 running tunnel in combined top heading/bench with a subsequent invert excavation. Reinforcement consisted of lattice girders, welded wire fabric for initial lining and welded wire fabric for final shotcrete lining. Dr. Sauer and Partners assisted in the production of design criteria for the final design and produced finite element structural computations for the large station caverns.
