Projects - Underground Car Parks

Underground Car Parks built with permanent steel sheet pile Walls

Underground car parks are essential infrastructure in dense urban environments, where space is limited and construction constraints are high. Steel sheet piles offer a fast, sustainable, and cost-effective solution for building these structures, especially in challenging soil and groundwater conditions.

This collection of case studies showcases how ArcelorMittal’s steel sheet piles have been successfully used as permanent retaining walls in underground car parks around the world. From Europe to Asia and the Americas, these projects demonstrate the versatility and reliability of sheet pile solutions.

Benefits of Steel Sheet Piles for Underground Car Parks

  • Space efficiency: slim wall profiles maximize usable space in tight urban plots.
  • Watertightness: seal-welded interlocks and coatings ensure dry construction and long-term durability.
  • Speed of execution: prefabricated elements allow rapid installation with minimal site disruption.
  • Structural performance: sheet piles can carry horizontal and vertical loads, often replacing traditional concrete walls.
  • Aesthetic integration: coated and visible steel walls contribute to architectural design.
  • Sustainability: recyclable steel and reduced excavation footprint support more sustainable construction.

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Tourcoing | France

In a dense city center near a tramway and historic buildings, sheet piles were used as permanent retaining walls for a residential underground car park. AZ 18 and PU 18 piles ensured watertightness and structural integrity, with vibration monitoring and aesthetic coatings enhancing performance and appearance.

Haarlem | The Netherlands

Two large underground car parks were built as part of the Raaksproject redevelopment. AZ 36-700 sheet piles formed watertight walls with welded interlocks and tie rods. The solution enabled deep excavation and efficient construction in soft soils with high groundwater.

Aalst | Belgium

In the historic center of Aalst, a three-level underground car park was built using a hybrid solution of Cutter Soil Mix (CSM) walls and AZ 26-700 / AZ 36-700N sheet piles. This approach ensured vibration-free installation and excellent watertightness in soft soils with high groundwater. The sheet piles serve as permanent structural and visible elements, transferring vertical loads and contributing to the car park’s fire resistance. The Hopmarkt underground car park was completed with aesthetic coatings and a 100% watertight wall system.

Rio de Janeiro | Brazil

For the Vogue Square shopping mall and hotel, a two-level underground car park was constructed using GU 14N sheet piles as permanent retaining walls. The piles were installed with vibratory hammers and anchored temporarily during excavation. Once the slabs were cast, the anchors were released, and the slabs acted as permanent struts. The coated sheet piles remain visible, offering both structural and aesthetic benefits. The solution enabled fast, clean construction with minimal workforce.