Project Outline
Tehran's ever-growing population, deteriorating air quality and
noise pollution, and persisting vestiges of urban sprawls of recent years have
combined to pose immense and seemingly insurmountable complications for city
residents. Hence, the main objective of Yadegar Imam Highway was to provide a
rapid and convenient link between South and North Tehran to ease the great
pressure on city commuters and to ensure a healthier environment for local
residents. Part of the Yadegar Imam highway project, the three-kilometer flyover
built by Kayson is the longest in Iran. The area under the flyover is being
turned into a spacious commercial complex. Kayson has designed and is going to
build a multi-story parking facility, as well as a high-rise office building on
the same site. The flyover, constructed in the fast track mode, was completed by
Kayson in 18 months, exactly a year ahead of the contract deadline. Upon
completion of the project, Kayson was awarded a First Prize Certificate For the
Best Construction Work of the Year (1997) by the Environmental Engineering &
Architecture Forum of Iran.
Technical Features
Yadegar Imam Flyover is
supported by 92 concrete bridge piers, 17-32 meters apart. Each bridges pier has
four columns. The column heads are built of pr-cast concrete segments, with an
in-situ reinforced concrete slab placed on the beams. The middle guardrail was
also constructed by means of in-situ concrete method. Reinforced earth walls
which have proved to perform well against seismic forces were used to build the
flyover’s six ramps. It is to be noted that the use of pre-cast concrete
segments, on such a scale in various parts of the bridge, including its main
structure, had no precedent in Iran
Key Statistics
- Earthwork: 620,000 Cubic
Meters
- Concrete: 116,000 Cubic Meters
- Formwork: 270,000 Square Meters
- Reinforcement and other Metal Works: 18,000 Tonnes