To main content

Riverbed and slope protection, Gbaran Ubie

The Shell Petroleum Development Company of Nigeria Limited (SPDC) has constructed a gas processing facility in the Niger Delta on the outside bank of a bend of the River Nun at Gbaran Ubie, north of Yenagoa. To facilitate the importation of the processing modules, a Materials Offloading Quay was constructed, including a ro-ro ramp, a passenger jetty and a fire water station.

River bed protection in front of the quay wall and slope protection on the north and south sides of the quay wall was required to prevent scour by the flow of the river and propeller wash from vessels using the quay wall.

Design of river bed and slope protection

The original design of the river bed and slope protection consisted of Reno mattresses placed on a geotextile, which at the time was considered the preferred option with the aim of reducing rock quantities. However, following a design review by Hydronamic, the Boskalis Engineering Department, and given the technical construction considerations recommended by the Boskalis Rock Department, SPDC later agreed to change the design of the bed protection along the quay wall and slope protection below the LWL along the South Bank, and to install protection consisting of rock armor on a granular filter layer rather than Reno mattresses.

Cooperation Pelfaco Limited and NWDM

SPDC awarded the contract for the river bed and slope protection to Pelfaco Ltd. In early January 2011, NWDM was asked to work with Pelfaco as a sub-contractor in order to ensure that the most critical parts of the site at least would be protected before the next rainy season of 2011. Following the successful completion of these emergency works the cooperation was further extended until the whole of the river bed protection along the quay wall and the slope protection on the South Bank was completed.

Related projects

Selected filters
DJI_0005__4_.JPG

Construction of greenfield port and breakwater for Dangote quays Lekki

The Dangote Group, owned by Aliko Dangote, is building Africa’s largest oil refinery and fertilizer plant in Lekki, 60 kilometers east of Lagos, Nigeria. To facilitate the import of out-of-gauge components and other materials required for construction activities, a port was constructed

P67.jpg

P67 FPSO Transportation

On behalf of Company Petrobras and Client COOEC, Boskalis executed the dry transportation of the P-67 FPSO in 2018 from the COOEC Qingdao yard in China to Rio de Janeiro in Brazil. The P-67 FPSO will produce 150,000 bpd and compress six million cubic meters of natural gas daily in the Lula North section of the Lula-Cernambi field in the Santos basin.

Harderwijk_Lorentzhaven__7__header.jpg

Redevelopment Waterfront, Harderwijk

Boskalis Nederland is involved in one of the largest redevelopment projects in the Netherlands. The Harderwijk Waterfront project involves the complete transformation of the lakeside area of this IJsselmeer town. The project covers a strip approximately six kilometers long, combining homes, work and recreation in a natural way. The Harderwijk Waterfront will generate a quality boost in many areas: quality of life, employment, traffic, tourism and the environment.

Pluit_City_Island-bird_eye_view.jpg

Artificial island
off the coast of
Jakarta, Indonesia

Boskalis has been awarded a contract by PT Muara Wisesa Samudra to design and construct an artificial island measuring 160 hectares off the coast of Jakarta, Indonesia. The work is part of the dredging and land development works for the new Pluit City. It will be executed in a joint venture with Van Oord.

Medium-Foto_1_-_artist_impression_nw_situatie_A1_afslag_met_spoorbrug__1_.jpg

Road enlargement motorway A1-A6, Diemen-Almere

The A1/A6 project is one of the five sub-projects for Rijkswaterstaat that are included in the upgrading of the road network linking Schiphol Airport, Amsterdam, and Almere (SAA). The total length of the SAA link is 40 kilometers. Boskalis, together with partners, is responsible for the section from the Diemen intersection to Almere, a distance of approximately 23 kilometers.

29-8-11_006_header.jpg

Port maintenance,
Açu Port

Açu Port in São João da Barra, Rio de Janeiro (Brazil) is one of the largest port-industry complex in Latin America. The port consists of two terminals: T1, an offshore terminal for handling iron ore and oil, and T2, an onshore terminal built around the inner navigation channel which accommodates offshore supply companies and will handle bauxite, general cargo and vehicles.