Rehabilitation and modernization of the Solina dam

Solina 1.jpg

The Solina dam, constructed in 1961-1968, is the highest dam in Poland (81.8 m), the longest concreteone (664.8 m), and the structure with the largest volume of the concrete massif (768,000 m3).

The dam body consists of 43 expansion zones. Such a structure prevents the tension and cracking of the concrete. Expansion joints between the sections are sealed with rubber bands. Communication and control galleries inside the dam run on four levels. Their total length amounts to 2,073 m. Water seeping through is collected by a drainage system. Both the smallest leaks, as well as any structural deformations are continuously monitored by a precise measuring equipment. The dam, founded on rock and working under the pressure of dammed water, is endangered by the impact of adverse filtration occurances. To protect against excessive filtration, a cement-grout curtain was carried out in the rock foundation of the dam, up to the max depth of 60 m.

However, water seepages on the downstream side of the dam, indicated leaks in some sections of the concrete massive. Finding solution to this problem was commissioned to Hydroprojekt who elaborated a comprehensive design documentation.

Geological and geotechnical surveys performed under the contract allowed to determine the causes of adverse filtration occurences in the body of the right abutment of the dam. In order to remove them, the walls of the pipeline canal, running in the right abutment of the dam were water proofed and water inflow to the canal was shut off with a concrete wall. In the next step, new sections of the cement-grout curtain, sealing the rock foundation and shutting off the inflow of the hillside waters to the dam, were performed. The applied solutions proved to be effective and caused significant reduction of the filtration process.

PROJECT DESCRIPTION:

Client:Location:Scope of works:

PGE Energia Odnawialna S.A.

Branch Office ZEW Solina-Myczkowce S.A.

38-610 Solina

Podkarpacie Voivodship,. Lesk County,
Solina Community, Poland
conceptual, preliminary and detailed designs,
construction supervision on behalf of the author

Implementation period: 2010-2011
Value of the project: PLN 1.73 mln / PLN 1.42 mln

 
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