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Worksite of "Macedonia"Airport

PROJECT:  Worksite of "Macedonia"Airport.

CLIENT:  j/v Aktor SA - Athena SA                           

BRIEF DESCRIPTION:
 
Design support of the contract joint venture for the construction of Runway 10-58 at the airport of Thessaloniki "Macedonia". The more important are the following designs:
  1. Detailed design of an 8.0x18.5m steel platform at Gritsa (Litochoro - Greece), for the runway expansion material transportation. The design included the platform access works and foundation - anchoring. This platform has a projecting cantilever of 7m. capable to support simultaneously 2 unloading dumpers of 50tn. each.
  2. Detailed design, for the adaptation and load bearing capacity, of an existing 5.8x10.55 m steel platform placed at the airport site, for the material transportation of the runway expansion. The design included the foundation and anchoring of the structure. This platform has a projecting cantilever of 5m. and is capable to support one unloading dumper of 50tn.
  3. Modification of an existing steel formwork, for the construction of concrete blocks of the runway embankment retaining wall, with alternative proposals - solutions for the lifting of blocks.
  4. Detailed design for the amendment of the top part of runway embankment retaining wall.
  5. Detailed design of various culverts crossing taxiway and at the end of runway, all designed with heavy aircraft loadings (as defined by Airbus up to A340-600 and Boing up to B747-400 and B777-300.
  6. Lifting of various heavy objects such as precast concrete culverts & very heavy concrete blocks (up to 75tonns) and scaffolding solutions
  7. Design with two alternatives, for the amendment of the runway approach lights Access Bridge, in final stage and the second one (see below) in detailed design stage. The bridge has a total length of 750m with 30m typical spans and 5 transverse bridging structures each 28m long. The corridor width is 1.50m through the bridge length. Some features of the project design:
    • The piers consist of:
      • alternative 1: One pair of vertical steel piles D813x12.5 filled with concrete in order to increase stiffness. Pile caps are reinforced concrete, 1.30m thick, and superstructure is supported on them.
      • alternative 2: Set of three steel piles D559x12.5, two raked ¼ and one vertical. Pile caps are steel structures from closed sections and superstructure is supported on them.
      • In both alternatives and for the piers where the cross-bridging structures are supported (first 5 from the land, spanning over a length of 14m at either side of the main bridge), are used 4 piles with sections and pile cap layout similar to their respective alternatives.
      • It should be noted that the shop prepared pile caps have a structural arrangement that can tolerate pile misalignments
    • The foundation is in open sea at depths 13 to 16m, on a loose soil.
    • Bridging (access path) is quite typical, has a width of 1.5m and use 2 girders of profiled sections HEA500 (main structure) or HEA320.
    • The structure is continuous without special bearings and expansion joints. Given the importance of the project the design considered:
      • Detailed analysis for the full structure that was including all structural members.
      • Increased seismic loading and spectrum analysis,
      • sea wave height 1.85m with various angles of attack taking into account an increased pile diameter (1.0m) and reduced steel cross section from oxidation,
      • wind to EN-1991-1-4,
      • temperature change ± 350C and top - bottom difference ± 130C,
      • Live load 2kPa on deck and a concentrated 4kN.
      • Third party independed design verification
    • Preparation of specifications, cost estimates, bill of materials.
    • Support for the construction JV during project erection preparing additional detailed drawings, assisting the solution of various technical issues arose during construction and verifying / approving shop drawings.
    • Construction of the project proved to be smooth although many of the issues that a construction face, appeared.

Design years: 2007-19
Design standards: EN 1990, Greek Standard for Structural Concrete (EKOS), Greek Earthquake Design Standard (EAK)

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