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Rehabilitation of the Pressurized Hydraulic Tunnel: A Case Study of the Pumped-Storage Hydropower Plant “Bajina Bašta“
Stevanović, Dušan
Dumić, Miloš
Mirković, Uroš
Radovanović, Slobodan
Danilović, Vladimir
The “Bajina Bašta” pumped-storage hydropower plant was commissioned in September 1982. The facility is located in the Drina River valley, immediately downstream from the existing Bajina Bašta hydropower plant dam, whose reservoir serves as the lower basin. The "Beli Rzav" pumped reservoir, located in the valley of the river of the same name in the Zaovine region, functions as the upper basin. In addition to the upper and lower reservoirs, the power plant complex comprises a powerhouse and a headrace–tailrace system, which consists of several interconnected components: upper and lower intake/outlet structures, the headrace–tailrace tunnel, the tunnel bifurcation, a surge shaft, an inclined penstock, and a horizontal penstock with a bifurcation. Based on the monitoring and maintenance performed during the operational period of the tunnel, as well as on the condition of the structure observed in 2005, the scope of rehabilitation works was defined. This paper initially presents a description of the facility and its condition immediately prior to the rehabilitation, with particular emphasis on the hydraulic tunnel. The core focus is on the presentation of the rehabilitation technology and execution, which involved pressure grouting, the installation of prestressed rock anchors and chemical grouting. The paper discusses the results and challenges encountered during the rehabilitation process, offering a critical analysis aimed at emphasizing the significance of rehabilitation works and encouraging the exchange of experience in the restoration of capital infrastructure with extended service life.
engleski
2025
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hydraulic tunnel, concrete lining rehabilitation, grouting, “Bajina Bašta” hydropower plant, pumpedstorage hydropower plan, case study
10.5937/SETC25031S