Construction Project
Overflow Collector Wuppertal, Contract section 5 |
Location
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Client
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Planning
- City of Wuppertal-Office for City Drainage
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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
- Three excavation pits in open construction (D = 16 m) with 14,000 m³ excavation
Reinforced concrete line (internal diameter 2000 mm) with a length of 1,685 m
Dam structure with numerous fixtures such as inductive flow rate meters and shut- off valves
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Special features
- Hydraulic pipe tunnelling (Øa = 2.60 m) with tunnelling lengths of 735 and 950 m
- Construction method protective of groundwater due to tunnelling under compressed air
- Continuous monitoring of the road header by the use of a local section machine
- Tunnelling of radius of 300 and 400 m
- Line slope 2 mm/m with a required precision of +/- 50 mm
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Utilization
- Rainwater and combined sewer collector
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Construction
- Three excavation pits with overlapping caisson piles
- Reinforced concrete line (internal diameter 2000 mm) with a wall thickness of 30 cm and pipe lengths of 3.00 m
- Dam structure as reinforced concrete construction in concrete impervious to water
- Regulatory shafts using sinking method made of reinforced concrete prefabricated parts
- Connection of collector and shafts with the mining gallery construction method
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Geology
- High groundwater level up to 4.50 m under land surface and 11.00 to 13.00 m above top point of pipe
- Gravel from the Wupper river
- Greywacke bound in calcium, greywacke bound in quartz
- Limestone with a rock stability of up to 150 MN/m²
- Water permeability extremely high
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