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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

Tunnels and bridges
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Placing scour protection

Protecting the pile.

Tunnels and bridges
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Installation and ballasting pillar

Tunnels and bridges
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Installation of bridge parts by tandem lift

Tunnels and bridges
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Dredging the tunnel trench

Boskalis_Immersed_Tunnels.pdf
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Laying the tunnel foundation

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

Boskalis_Immersed_Tunnels.pdf
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Locking fill, trench backfill and rock protection.

Placing the tunnel roof scour and anchor protection.

Boskalis_Immersed_Tunnels.pdf
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Construction of building dock and water management

Immersable tunnel elements.

Boskalis_Immersed_Tunnels.pdf
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Towing out and installation

Immersable tunnel elements.

Boskalis_Immersed_Tunnels.pdf

Our projects

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Tunnel construction Warnow, Rostock

The Warnow Tunnel is located in Rostock, Germany, at the old mouth of the river Warnow in the Baltic Sea. In the DDR period this area grew out to be the main harbor of East-Germany. After the 'turn' (die Wende) in 1989 the port more or less died. Goods came cheaper and quicker from Rotterdam, Bremen and Hamburg by rail.

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Fixed Link between Rosario and Victoria

The Joint Venture Boskalis International - Ballast Nedam JV was a subcontractor to the Consorcio Impregilo, Hochtief, Roggio and Techint which was awarded the construction of the fixed link between Rosario, in the province of Santa Fe and Victoria, in the province of Entre Rios. The Client in this project was the Argentine Government, and the leader of the Consorcio was Impregilo. The Consorciol executed all the civil constructions such as bridges while the JV Boskalis International – Ballast Nedam (BKI/BND) constructed, using sand only, the road embankments, connecting the several bridges.

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Cleanup, Westergasfabriek

The Westergasfabriek was built by the British firm Imperial Continental Gas Association (ICGA) in 1883, and was at the time the biggest coal-fired gas factory in Amsterdam. The project site, covering four hectares, housed coal storage yards, gasometers, purification plants, a water tower and office buildings, all designed by the famous Dutch architect Isaac Gosschalk. The municipal energy company used the site for storage into the early 1990s.

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Land reclamation, Shaikh Khalifa Bin Salman Causeway

The Shaikh Khalifa Bin Salman Causeway is located in the State of Bahrain in an expanse of water called the Khawr Al Qulayah. It connects the Hidd Drydock Highway to the Mina Sulman Port. This major infrastructure project is carried out in advance of the planned expansion of the Bahrain port activities. This New Port project is planned at the Hidd side and via the Shaikh Khalifa Bin Salman Causeway direct connected with the existing Mina Sulman port and Saudi Arabia. The total length of the Shaikh Khalifa Bin Salman Causeway is approximately 6,500 m, including a bridge of 400 m, which was constructed in 2000.

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Tunnel construction Øresund, Denmark - Sweden

The Øresund Tunnel forms part of the Øresund Link that connects the cities of Copenhagen in Denmark and Malmö in Sweden across the Øresund.

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Land reclamation Check Lap Kok airport Hong Kong

In 1996 Hong Kong was a modern city-state with almost 6 million inhabitants where air traffic was a very important component for economic activity. The old airport Kai Tak, with a single runway, was no longer able to cope with the growing number of passengers and amount of freight.  The authorities decided to build a new, bigger airport at a new location in Hong Kong, a 350 hectares hilly island off the coast about 28 km west of the city center.

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Dredging & Inland Infra

Offshore Energy

Salvage

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More infra solutions

Land reclamation

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

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Coastal protection

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

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Environmental services

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

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Roads and railways

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

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Inland ports and waterways

Boskalis designs, builds and maintains inland ports and waterways.

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