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A penstock is a system of pipes used to convey water under pressure from a reservoir or intake to a point of use.
Depending on the topographical constraints and the technologies available at the time of their construction, penstocks may be above ground or underground, and made from various materials such as steel, reinforced or prestressed concrete, composite materials (GRP, HDPE, etc.) or cast iron.
The penstocks made of steel, consisting of shell sections produced from rolled flat plates, account for the majority of structures currently in operation.
This historical technology is linked to the metallurgical expertise and installation resources available at the time, particularly for handling pipes on site.
Several assembly techniques are used to form the shell sections: riveted, gas-welded, flanged, autofretted, mechanically welded, etc.
The penstock is generally supported by civil engineering structures:
Depending on the nature of the ground, these structures may require active or passive anchors to transmit the forces into the soil.
Hydrostadium carries out studies and manages repair, renovation or construction projects for penstocks. Depending on their location, some works may be particularly technical due to the length of the penstock (sometimes several kilometres), access conditions, steep terrain or environmental constraints.
Access the details of a project by selecting a point on the map.
The project consisted of replacing the intake (PE) valves and creating technical facilities supplied by the Enedis network, with a fibre-optic link between the sites. Flow meters were installed on...
The project involved refurbishment work on the coatings of the penstocks. Main technical features Internal diameter: 2.5 m; Nominal thicknesses: 9 to 23 mm; Length: 550 linear metres; Slope:...
The project involved renovation work on the internal lining of the penstocks upstream of the head gates, as well as mechanical work. Main technical features Internal diameter: 1900 mm...
The rehabilitation of the Argentière siphon involved anti-corrosion protection works covering the entire internal surface, mechanical works and civil engineering works. Main technical features...
The project consisted of restoring the Claux penstock following a rupture. The works involved the partial replacement of the penstock. Main technical features Riveted steel penstock over 192...
HYDROSTADIUM provided project management services for the comprehensive renovation of the scheme, including detailed design studies for the penstock, contractor procurement and construction...
Project management for the complete rehabilitation of the Notre-Dame de Briançon development (3.4 MW), including detailed design studies for the penstock. Main technical features Ø...
