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Piacenza viaduct is one of the structures along the new high-speed network in Italy
[...]
For the Port of Rotterdam, the Netherlands have built a dedicated Freight Railway Line
[...]
The development of a new railwaystation in the commercial and leasure area of Amsterdam South East is a mayor project.
[...]
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
[...]
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.
[...]
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.
[...]
Ertan dam - Arch Dam Works (Lot I)
published: 12 07 2000
The dam is located in China's Sechuan province on the Yalong River, a tributary of the Jinsha (Yangtze Kiang).
The dam is located in China's Sechuan province on the Yalong River, a tributary of the Jinsha (Yangtze Kiang).
Ertan Hydropower Project was a project with power generation as its main purpose, and log-passing as its subsidiary function. The project "lot 1" consisted of a 240 m. high parabolic double-curvature concrete arch dam, 775 m. long at crest level, and a 170 m. long and 80 m. high concrete water intake for 6 penstocks, 9 m. in diameter. An underground powerhouse with various associated tunnels formed lot 2, given to another Joint Venture.
Tensacciai provided design and installation directions for the anchorages.
The middle level spillway outlet, with its radial gate opening size being 5x6m., could operate at a head of 100m. As the radial gate withstanded large thrust forces of the water, pre-stressed Tensacciai U-type anchors were used in its pier and supporting beam.
It was the first time in China to use such an anchor structure. Six primary anchorages (12 strands) were arranged in each side of the pier, with the maximum length of 74 m. and each with a service load of 210 tons. In the beam there were 5 secondary anchorages (200 tons) on the outside, and 3 anchorages (170 tons) on the inside. The primary anchorages were locked after being tensioned to 1.17 times the service load, while the secondary anchorages were locked when tensioned to 1.10 times the service load. Anchor heads were then further fixed by second stage concrete and grouting. Without weakening the structure of the dam, relatively even distribution of the pre-stresses and low rate of relaxation were the outstanding advantages of the U-anchorages. The recorded rate of relaxation after 13 days of tensioning was 0.6%.
Ertan Hydropower Project was a project with power generation as its main purpose, and log-passing as its subsidiary function. The project "lot 1" consisted of a 240 m. high parabolic double-curvature concrete arch dam, 775 m. long at crest level, and a 170 m. long and 80 m. high concrete water intake for 6 penstocks, 9 m. in diameter. An underground powerhouse with various associated tunnels formed lot 2, given to another Joint Venture.
Tensacciai provided design and installation directions for the anchorages.
The middle level spillway outlet, with its radial gate opening size being 5x6m., could operate at a head of 100m. As the radial gate withstanded large thrust forces of the water, pre-stressed Tensacciai U-type anchors were used in its pier and supporting beam.
It was the first time in China to use such an anchor structure. Six primary anchorages (12 strands) were arranged in each side of the pier, with the maximum length of 74 m. and each with a service load of 210 tons. In the beam there were 5 secondary anchorages (200 tons) on the outside, and 3 anchorages (170 tons) on the inside. The primary anchorages were locked after being tensioned to 1.17 times the service load, while the secondary anchorages were locked when tensioned to 1.10 times the service load. Anchor heads were then further fixed by second stage concrete and grouting. Without weakening the structure of the dam, relatively even distribution of the pre-stresses and low rate of relaxation were the outstanding advantages of the U-anchorages. The recorded rate of relaxation after 13 days of tensioning was 0.6%.
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| Project | : | ERTAN DAM - Arch Dam Works (Lot I) |
| Location | : | Sechuan Province (China) |
| Anchor type | : | U-type prestressed anchor |
| Main client | : | (EHDC) ERTAN HYDROELECTRIC DEVELOPMENT CO. LTD. |
| Contractor | : | ERTAN JOINT VENTURE (EJV): IMPREGILO SPA (Italy) - EIGTH HYDROELECTRIC ENGINEERING BUREAU (China) - DUMEZ INTERNATIONAL and GTM INTERNATIONAL (France) - TORNO SPA (Italy) |
| Designer | : | (CHIDI), CHENGDU HYDROELECTRIC INVESTIGATION, DESIGN & RESEARCH INSTITUTE (China) |
| Consulting | : | HARZA ENGINEERING COMPANY (USA) |
| Period | : | 1993 - 1998 |
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