1. Dualisation of Ekim Itam - Ikot
Oku Ikono Road, Construction of
3 Flyovers, Akwa Ibom
Client:
Akwa Ibom State Ministry
of Works and Transport
Construction Period:
01/2008 – 12/2011
Services:
Construction of 21km dual
carriageway including three
flyovers
The Ekim Itam - Ikot Oku Ikono Road is a
federal road in Akwa Ibom State. Julius Berger
Nigeria PLC was awarded the contract for
the dualisation of the 21km long existing
lanes to serve as an expressway in 2007. At
the crossing over of the Ikpa River, a three-
span river bridge with a total length of 66m
was constructed. This bridge was founded on
925mm diameter steel piles.
In 2008, an addendum to the existing contract
for the construction of three flyovers to optimize
the traffic flow inside the township of Uyo was
awarded additionally. The flyover’s have a total
length of 344m (F1), 424m (F2) and 100m (F3).
Due to the bad soil conditions, the flyovers
were founded on 1,695 numbers of reinforced
precast concrete piles, each of them with a
length of 18m. The flyover F1 and F2 have a
main bridge span of 200m. For optical, as well
as maintenance reasons, the ramps of F1 and
F2 were totally covered with wall slabs.
For the dualisation of the existing road
extensive demolition works along the road
were necessary. All electrical installations
along the road were relocated or new erected.
After detailed studies of the existing traffic
density and under consideration of the further
expected high traffic loads a strengthening of
the standard cross section was required.
A drainage system of trapezoidal drains and
U-channels for road and surface drainage was
erected. In the township of Uyo, walkways
were placed on both sides of the road.
To discharge the surface water inside the
township of Uyo, an addendum for the
construction of a discharge drain was
additionally awarded. It consists of an
underground drainage pipe with an inner
diameter of 2,000mm, 4 huge manholes with
an inner diameter of 10m and up to 23m deep,
an outlet structure with stilling basin and a
system of open U-channels.
The pipeline under construction is using
a micro tunnelling system, the so called
‘pipe jacking method’. With this system, no
earthworks or demolition works on the surface
are required. The pipe diameter 2,000mm has
enough capacity to discharge also further parts
of the town.
The construction of a fourth flyover with a total
length of approx. 500m is planned.
JBNProjectBookNo.NG-2007-041-01