Renforcement conduites GeniLac – Secteur P47

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The GeniLac® project of the Services Industriels de Genève (SIG) aims to create a hydrothermal network. The fluid transported is treated potable water, under pressure, with a temperature ranging between 1 and 30°C. In the so-called “P47” sector, between the end of the Ofrou chamber and the P47 roundabout, a branch of this network consists of two parallel pipes (1 forward run, 1 return run) with large diameters (internal diameters 700 mm). These pipes consist of a steel tube called the steel sheet core, factory-coated with a layer of reinforced concrete on the outer surface (extrados), and a thin layer of unreinforced concrete on the inner surface (intrados). The tubes were joined on site by welding. They were laid in an open trench in a highly constrained site. To strengthen these conduits, SIG wishes to proceed with structural lining suitable for withstanding an internal pressure of PN16. The GeniLac® project of the Services Industriels de Genève (SIG) aims to create a hydrothermal network. The fluid transported is treated potable water, under pressure, with a temperature ranging between 1 and 30°C. In the so-called “P47” sector, between the end of the Ofrou chamber and the P47…

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