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Piacenza viaduct is one of the structures along the new high-speed network in Italy
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For the Port of Rotterdam, the Netherlands have built a dedicated Freight Railway Line
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The development of a new railwaystation in the commercial and leasure area of Amsterdam South East is a mayor project.
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The new A10 Highway between Bucelas and Carregado crosses the Loureiro river valley on a 1.050 m. long viaduct at a height of about 90 m. above water level
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The second Imigrantes highway, inaugurated in December 2002, completes the Anchieta-Imigrantes Highway Complex linking the city of São Paulo to the port of Santos and the São Paulo State coast.
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High speed train line Milan – Bologna / Piacenza 1 and Piacenza 2 viaducts
13 11 2005Piacenza viaduct is one of the structures along the new high-speed network in Italy
[...]
High Speed Freight Railway Line
02 07 2005For the Port of Rotterdam, the Netherlands have built a dedicated Freight Railway Line
[...]
New Railway Station Bijlmer
06 05 2005The development of a new railwaystation in the commercial and leasure area of Amsterdam South East is a mayor project.
[...]
Loureiro Viaduct
12 05 2003The new A10 Highway between Bucelas and Carregado crosses the Loureiro river valley on a 1.050 m. long viaduct at a height of about 90 m. above water level
[...]
The Imigrantes Second Highway
07 01 2003The second Imigrantes highway, inaugurated in December 2002, completes the Anchieta-Imigrantes Highway Complex linking the city of São Paulo to the port of Santos and the São Paulo State coast.
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Offtake tunnels for the Presenzano hydroelectric facility
published: 02 09 2000
The two pressurized offtake tunnels are part of the works of the new Presenzano hydroelectric facility. The two tunnels run in parallel 60 m. apart, connecting the reservoir with the penstocks reaching the power station.
The two pressurized offtake tunnels are part of the works of the new Presenzano hydroelectric facility. The two tunnels run in parallel 60 m. apart, connecting the reservoir with the penstocks reaching the power station.
To withstand the hydraulic pressure, the two tunnel's liner rings were prestressed by a set of circular cables placed at 30 cm. to 58 cm. spacing (total 11,500 cables).
The use of greased, polyvinyl chloride-coated cables made it possible to bury the prepackaged cable in the liner pour, substantially reducing friction and facilitating laying.
The liner was laid in two phases: first, by pouring a 70-degree-central-angle inverted arch, and then the rest of the structure was poured in 12 m. long segments. After 60 days of curing, the circular cables were tensioned, 6 jacks being used, one for each strand, there being a deviator at the anchorage head placed inside the precast boxes. These boxes were sealed with a special expanding rheoplastic cement. When the lining had been tensioned, any cavities behind it were grouted with cement mortar through special holes made in the lining.
To withstand the hydraulic pressure, the two tunnel's liner rings were prestressed by a set of circular cables placed at 30 cm. to 58 cm. spacing (total 11,500 cables).
The use of greased, polyvinyl chloride-coated cables made it possible to bury the prepackaged cable in the liner pour, substantially reducing friction and facilitating laying.
The liner was laid in two phases: first, by pouring a 70-degree-central-angle inverted arch, and then the rest of the structure was poured in 12 m. long segments. After 60 days of curing, the circular cables were tensioned, 6 jacks being used, one for each strand, there being a deviator at the anchorage head placed inside the precast boxes. These boxes were sealed with a special expanding rheoplastic cement. When the lining had been tensioned, any cavities behind it were grouted with cement mortar through special holes made in the lining.
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| Project | : | OFFTAKE TUNNELS FOR THE PRESENZANO HYDROELECTRIC FACILITY |
| Location | : | Presenzano (Caserta) |
| Type | : | Ring post-tensioning of the offtake tunnels |
| Left hydraulic tunnel | : | 2,310 m. |
| Right hydraulic tunnel | : | 2,295 m. |
| Main Client | : | ENEL (Napoli) |
| Contractor | : | DE LIETO COSTRUZIONI GENERALI SPA (Italy) |
| Designer and consulting | : | CENTRO DI PROGETTAZIONE E COSTRUZIONI IDRAULICHE ED ELETTRICHE of Naples - ENEL - Studio Ingegneria G. Lombardi – Locarno (Switzerland) |
| Period | : | 1988 - 1992 |
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