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Reconstruction of ELDA pipeline bridge

PROJECT:  Reconstruction of ELDA pipeline bridge

CLIENT: Triton Consulting Engineers Ltd.
ASSOCIATED OFFICES: Triton Consulting Engineers Ltd                                         

BRIEF DESCRIPTION:
 
Design for the replacement of a part of a pipeline bridge approximately 200m long for the Aspropyrgos Greek Refineries with new piers, after the complete destruction caused by collision of the ship "La Guardia" in October 1994. The sea depth at the location of the project range from 6 to 12m and the first 8 meters of the soil material of the deep is very loose (unable to support the weight of the contacting site investigation drill). Due to this fact special attention was given to horizontal stiffness of the project so the pipeline would not start acting as structural part of the bridge. In detail:
  • The project is arranged between 2 artificial islands which are used for berthing ships. The distance between is 180m and the original project had openings of about 20m. The new bridge required change of pier locations so pile driving would not hit on destroyed piles. So there was a shift of 10m creating spans of 10 +8 x20 +10m. Along with this project required the replacement of a 16m span just after the artificial island using old piers.
  • New piers consist each of 2 steel piles D813 inclined 1 / 5 perpendicular to the length of the bridge. The piles are internally filled with reinforced concrete and connected to a pile cap, also made of reinforced concrete, having height 1.5m mainly for stiffness increase.
  • The openings are all typical and consist of 2 main custom girders, height 927mm, and precast reinforced decking (without composite action). Transverse to the main girders arranged steel beams to support pipelines of the refinery.
Consulting during the construction, to resolve technical issues the project.
 
The project has been completed and is operational.
 
Design years: 1994-5
Design standards: DIN, Greek Earthquake Design Standard (NEAK)

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