FIELD: construction.
SUBSTANCE: invention relates to construction, namely to the area of mountain tunnels re-building. Re-building of destroyed section of the mountain road tunnel is carried out by the way of opening the destroyed part of the tunnel into excavation. Temporary tunnel casing of the restored section has the form of an arch, which is made from metal corrugated structures, and its delivery and installation in mounted form to the foundation inside the tunnel are made from above with a helicopter.
EFFECT: technical effect: reducing the labor intensity and timing of the re-building work inside the tunnel.
1 cl, 2 dwg
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| 0 |
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SU54292A1 | |
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