Construction Project
Municipal Train Duisburg, Construction Phase TA6-Lot 21 |
Location
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Client
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Planning
- Metropolitan Railway Construction Office of the City of Duisburg
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Investment volume
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Construction time
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Activities
- Construction management
- Contract management
- Technical coordination
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Structures constructed
- Two one-track tunnels build one above the other (L = 30 m)
- Track deviation and starting shaft shield tunnelling with open construction method (L = 114 m)
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Special features
- Roof shaft tunnelling with the protection of an injection hood
- Creation of a trough underneath the roof shaft by using high-pressure injection technology
- Widening of roof shaft and installation of inner shell of the upper tunnel
- Driving of lower tunnel under protection of high-pressure injection technology and of the upper tunnel
- Installation of inner shell of lower tunnel
- No lowering of groundwater level required thanks to use of injection and high-pressure injection technology
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Utilization
- Metropolitan railway tunnel of the City of Duisburg
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Construction
- Full excavation with gradated road header using New Austrian Tunnel method
- Temporary securing of tunnel using lining arches, concrete reinforcement steel and spray concrete
- Design of the tunnel inner shells as concrete impervious to water
- Excavation pits with subterraneous curtains and overlapping caisson piles
- Watertightness of the excavation pits by binding the subterraneous curtains and caisson piles in the in-situ carbon
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Geology
- Two groundwater storeys with seasonal fluctuations between 4.0 and 8.5 m
- Fills, clay, gravel, sand, fine sand, potter’s clay
- Chalk silt without sand inclusions respectively with sand strips and sand layers
- Rock of the carbon
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