Eleme Junction Interchange including Flyover, Rivers

Client:River State Ministry of Works

Construction Period:10/2007 – 10/2010

Services:Detailed engineering and construction of an urban interchange including a flyover bridge, culverts, ducts and street lighting

The site is located at Eleme Junction in Port Harcourt, River State. The main roads from Port Harcourt (Aba Express Way and East-West Highway) are crossing at this junction - both roads are 4-lanes. To handle the construction of an urban interchange, a flyover in the shape of a cloverleaf was mandatory and decided by the Ministry of Works.

The design and build contract was awarded to Julius Berger Nigeria PLC in 2007. After the contract award the works started immediately and the performance was a challenge for the whole team, especially the dewatering of the whole area and the conversion of the market area which was affected by the site.

To prepare the site Julius Berger Foundation, the special deep foundation unit of JBN PLC rammed 442 precast concrete piles (35/35cm, l=18m).

About 10,000m³ concrete at the classes of c25 – c45 were produced in the Koko-Ama Yard in Port Harcourt and transported through the whole city to the site.

The flyover bridge has a total of 8 spans with 11 precast concrete I-girders each and a total length of 180m and carries 4 lanes and 2 service lanes.

Because of the traffic, the transports of the I-girder could only be done at night.

A total amount of 145,000m³ of laterite from borrow pits had to be transported from 2 borrow pits and compacted at the site.

A pipeline from Shell is crossing two of the approaching ramps. The four pipes had been covered in coordination with and according to the specifications of the oil company.

The main part could be finished in 07/2010. Afterwards there were some additional works for variation like street lighting.

The enormous traffic at the junction required an elaborated HSE plan. During the construction works, the diversion of traffic had to be changed four times for a safe site.

There was a tense security situation along the whole project for the expat-staff working at the site. Because of the shut down at Port Harcourt, a subcontractor completed the final works, especially the ongoing street lighting works (variation).

JBN

Pro

ject

Boo

k N

o. N

G-2

004-

106-

00