| Popis: |
A description is given of the studies and field investigations undertaken to develop the design of caverns to be excavated in hard rock for large central energy storage facilities. Two schemes are considered including a 1000 MW capacity compressed air energy storage (CAES) and a 2000 MW capacity underground pumped hydro (UPH) requiring the excavation of approximately 900,000 yd3 (690,000 m3) and 8,000,000 yd3 (6,100,000 m3) respectively. Material presented includes the site selection methodology, site investigations, the design approach including construction and geotechnical considerations, and the construction cost estimates. Geotechnical considerations discussed include the selection of the cavern arrangement and cross section through evaluation of precedent experience, empirical assessment of the rock mass and preliminary strength/stress analysis. |
