Construction Project
New Construction Pumped-Storage Power Plant, Tunnelling and structural... |
Location
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Client
- Rheinisch-Westfälisches Elektrizitätswerk AG
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Planning
- RWE-Department Waterworks
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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
- Lead-in trench (H = 30 m) with 72° slope and 52,000 m³ rock removal
- Pressure shaft in horseshoe profile (L = 300 m) with 23° incline and 10,000 m³ rock excavation
- Intake tower in upper pool (L = 42 m)
- Shaft power station (L/W/H = 45.00/20.00/51.00 m) with 54,000 m³ rock removal
- Box capture dam (L = 150 m) with injection veil
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Special features
- Use of a hydraulically driven drill cradle for the slanted shaft (Øe = 5.35 m)
- Full excavation using explosive tunnelling for the slanted shaft
- Sinking of vertical shaft intake tower using shaft explosion method
- Sinking of power plant shaft as receptacle for the power plant equipment using side wall explosion method
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Utilization
- Pumped-storage power plant with the following machinery data:
- Nominal output 153 MW
- Nominal head 162 m
- Max. flow through turbines 110 m³/s
- Pumping capacity 75 – 100 m³/s
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Construction
- Lead-in trench securing with 2,100 rock nails and 3,300 m² spray concrete
- Shaft securing with 1,800 rock anchors and 2,500 m² spray concrete
- Shaft securing with 2,000 rock nails, 130 leader anchors and 5,000 m² reinforced spray concrete
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Geology
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