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A platform for research: civil engineering, architecture and urbanism
Development of pipelines for high operating pressures
In the context of hydropower plants the behavior of both the dam and the penstock and the interactions with the surrounding soil or rock mass play an important role. In particular, differential settlements may have a considerable impact on the structural behavior. A suitable construction type for penstocks laid in difficult ground is characterized by individual pipes, made of ductile cast iron, which are connected at the construction site by joints. They consist of pipes of five meter length, which are connected by joints at the construction site. At the joints two adjacent pipes are fixed by locking bars and water tightness is assured by a rubber sealing. Because of the flexibility of the joints such pipelines are very well suited for construction projects under difficult conditions, like in Alpine regions. The paper deals with the development of such pipelines for high operating pressures. A critical part of such pipes are the joints. For the design of such pipes a synthesis of numerical simulations and experimental validation is chosen. Prototypes are only produced for new joints fulfilling all requirements in the numerical simulation. These prototypes are then used to check the design by ultimate load tests and to compare the predicted response with the real one.
Development of pipelines for high operating pressures
In the context of hydropower plants the behavior of both the dam and the penstock and the interactions with the surrounding soil or rock mass play an important role. In particular, differential settlements may have a considerable impact on the structural behavior. A suitable construction type for penstocks laid in difficult ground is characterized by individual pipes, made of ductile cast iron, which are connected at the construction site by joints. They consist of pipes of five meter length, which are connected by joints at the construction site. At the joints two adjacent pipes are fixed by locking bars and water tightness is assured by a rubber sealing. Because of the flexibility of the joints such pipelines are very well suited for construction projects under difficult conditions, like in Alpine regions. The paper deals with the development of such pipelines for high operating pressures. A critical part of such pipes are the joints. For the design of such pipes a synthesis of numerical simulations and experimental validation is chosen. Prototypes are only produced for new joints fulfilling all requirements in the numerical simulation. These prototypes are then used to check the design by ultimate load tests and to compare the predicted response with the real one.
Development of pipelines for high operating pressures
Entwicklung von Rohrleitungen für hohe Betriebsdrücke
Lehar, H. (author) / Theiner, Y. (author) / Niederwanger, G. (author) / Hofstetter, G. (author)
2009
5 Seiten, 11 Bilder, 4 Quellen
Conference paper
English
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