Chacao Bridge Foundations
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Bibliographic Details
| Author(s): |
Benedicte Pich
(Systra, Paris, France)
Emilie Cousteix (Systra, Paris, France) Habib Kata'a (Systra, Paris, France) Mathieu Muls (Systra, Paris, France) Aymen Cheikh-Mahmed (Systra, Paris, France) Svein Erik Jakobsen (AAS-Jakobsen AS, Oslo, Norway) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Symposium: Tomorrow’s Megastructures, Nantes, France, 19-21 September 2018 | ||||
| Published in: | IABSE Symposium Nantes 2018 | ||||
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| Page(s): | S5-9 | ||||
| Total no. of pages: | 8 | ||||
| DOI: | 10.2749/nantes.2018.s5-9 | ||||
| Abstract: |
The 2750m-long Chacao Bridge will connect mainland Chile with island Chiloe. The three-tower suspension bridge will have two main spans over 1km length. Due to exceptionally high seismic forces, the foundations of this megastructure have been a challenge to design. Central and North Pylons are founded in Chacao channel respectively by four and two groups of nine piles. The piles are made of a reinforced concrete part surrounded by a structural steel casing. The steel casing is embedded into the seabed level by 10m at least and into the pilecap by more than one pile diameter. The casing embedment length ensures the transfer of the steel casing internal forces into the pilecap. This transfer is made by three coexisting mechanisms: a direct transfer at casing top level through the continuity of the reinforced concrete, through a pressure/contra-pressure mechanism and through shear connectors welded on the steel casing. |
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| Keywords: |
foundation pile suspension bridge pilecap structural steel casing
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