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Tunnels
and bridges

Boskalis designs, develops and constructs bridges and tunnels, providing solutions covering the entire process. For bridge construction over a river or estuary we first level the riverbed, install the bridge pillars or piers, and provide scour protection. Bridge parts can be installed by tandem lift. Underwater tunnel construction involves dredging the tunnel trench before laying the tunnel foundations. We also excavate construction sites for immersible tunnel elements that are then towed out and installed before backfilling the tunnel trench.

Top grade tunnel and bridge solutions

Designing, developing and constructing bridges and tunnels is technically complex and economically challenging. Boskalis provides design and environmental expertise. We employ innovative surveying and installation techniques and specialist materials.

We minimize risks and uncertainties to deliver the solutions you need.

Our track record speaks for itself. Over the past few decades, we have been involved in a large number of tunnel and bridge projects, including the Øresund immersed tunnel connecting Denmark with Sweden, and the Stralsund bridge in Germany.

Our tunnels and bridges solutions

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Leveling the riverbed

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Placing scour protection

Protecting the pile.

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Installation and ballasting pillar

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Installation of bridge parts by tandem lift

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Dredging the tunnel trench

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Laying the tunnel foundation

Laying the gravel or sand-flow foundation using the screeding technique.

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Locking fill, trench backfill and rock protection.

Placing the tunnel roof scour and anchor protection.

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Construction of building dock and water management

Immersable tunnel elements.

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Towing out and installation

Immersable tunnel elements.

Our projects

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Maintenance, Martin Garcia channel

The Rio Parana is the principal fairway for transporting the massive exports of agricultural products from the fertile plains of Argentina, Bolivia and Paraguay. Ocean going vessels sail the Parana River to the loading terminals in the Rosario region, situated 300 km upstream from the Rio de La Plata estuary. Both the Rio Parana and the Rio Uruguay flow into the Rio de la Plata. The Rio de la Plata can be described as a shallow inland-sea with natural depths between 1 and 6 m. The mouth of the Rio Parana from the Ocean is approximately 250 km. The Rio de la Plata has a width of 40 km on the upstream side near Buenos Aires and about 200 km downstream at the level of Montevideo.

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Dredging, reclamation and dewatering works, Gas-to-Liquids facility Escravos

The Escravos Gas-to-Liquids facility (EGTL) converts natural gas feed into high quality, environmentally superior, liquid GTL fuel, naphtha, and LPG products. The facility feed is approximately 320 million SCFD of natural gas and the facility produces approximately 33,000 BPD of products. The EGTL facility will be built on the north bank of the Escravos River tidal outlet, in the Niger Delta about 2 kilometers north of its confluence with the Atlantic Ocean on the Bight of Benin, approximately 100 nautical miles south east of Lagos, and 37 nautical miles west of Warri, Nigeria.

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Land reclamation, Half Moon Bay Island Manama

‘Half Moon Bay’ island is situated in the Seef area of Manama in the Kingdom of Bahrain. The purpose of the island is to accommodate a future 5 Star Hotel development as well as several villas. Engineering Department Hydronamic was engaged to develop the design of the island and to provide advisory services to Boskalis Westminster Middle East. Through good co-operation between the design engineers of Hydronamic and the construction team of Boskalis Westminster Middle East innovative ideas were developed which could be integrated into the rock protection design resulting in the successful and efficient construction with significant cost savings to the project.

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Expansion coal terminal, Muuga

The Muuga Coal terminal, sited on a bay, east of the existing port of Muuga, is to handle some five million tons of Siberian coal a year for destinations worldwide. The coal is shipped to Muuga by rail. Future developments may include container berths and steel facilities. The main contractor for the development of the Muuga coal terminal was the Estonian project management group A.S. Merko Ehitus. The dredging subcontract was awarded in late May 2003 to Terramare Eesti O.Ü., the Estonian arm of the Finnish-based Boskalis group company Terramare Oy.

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Creation artificial lagoon, Barcelona

Increasing or compensating nature is one of the challenges in modern infrastructural projects. Within the scope of the extension of the Port of Barcelona compensation was required for nature to be preserved. A natural reserve, south of the Port of Barcelona and north of the International Airport of Barcelona, had to be increased and was realized within the city limits of Prat de LLobregat by the use of the cutter suction dredger Para and its auxiliary equipment.

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Cleanup petroleum harbor, Amsterdam

The Amsterdam Petroleum harbor on the North Sea Canal has been used for the storage and transshipment of oil products since its construction in 1887. Over many years routine operations and unchecked discharges resulted in severe contamination of the harbor.

More infra solutions

Land reclamation

Boskalis reclaimes land, improves soil, protects shorelines and realizes coastal contruction projects.

Coastal protection

Boskalis constructs traditional hard sea defenses and innovative soft sea defenses.

Environmental services

Boskalis provides a broad range of environmental services including remediation of contaminated land and dredged sediment.

Roads and railways

Boskalis develops, supervises and realizes multidisciplinary road and railway projects.

Inland ports and waterways

Boskalis designs, builds and maintains inland ports and waterways.