BMG GmbH & Co. KG - Keithstrasse 2-4 - D-10787 Berlin | Tel: +49 (0)30 2100220

PDB 61

Construction Project
New Construction Pumped-Storage Power Plant, Tunnelling and structural...
Location
  • Herdecke am Hengsteysee
Client
  • Rheinisch-Westfälisches Elektrizitätswerk AG
Planning
  • RWE-Department Waterworks
Investment volume
  • approx. DM 42.0 million
Construction time
  • 45 months
Activities
  • Construction management
  • Contract management
  • Technical coordination
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
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
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
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
Geology
  • Siltstone
  • Sandstone