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op woensdag 19 november
- 19 november
- Thema maakbaar ontwerp
- Railcenter Amersfoort
- 13:00 - 18:00
Pilot Project: Mapping Utrecht’s Basement Cellars Using 3D Ground-Penetrating Radar
Utrecht’s city center has a complex subsurface where historic structures and modern infrastructure intersect. Construction cellars are often located in unknown or inaccurately mapped areas, close to heating pipes and other utility lines. Accurate knowledge of the subsurface is essential for repair work on these shipyard cellars and for replacing the heating network. Therefore, a pilot project was conducted to detect these structures non-destructively and map them in 3D.
The challenge:
a unique underground puzzle
The project had several objectives. Not only did it require the creation of 3D maps of heating pipes and other existing cables and pipes, but also of the tops of historic wharf cellars—all without digging.
What made this pilot project particularly complex? Multiple overlapping layers of historic buildings and modern infrastructure, all situated close together in a compact underground space. A situation that requires an extremely precise approach without disturbing the subsoil.
The approach:
combining multiple techniques into a single image
How do you map such a complex subsurface without digging? For this pilot project, TerraCarta opted for a combination of complementary techniques:
- 3D ground-penetrating radar: scans the subsurface in multiple layers simultaneously, allowing structures such as basement vaults and pipes to be visualized in three dimensions.
- Radio detection: locates known cables and pipelines and traces their routes.
- Direct surveying: ensures accurate recording of all measurement results in the National Triangulation System.
Combining these techniques provides a reliable and comprehensive picture of the subsurface, without the risk of damage or disruption.
The result:
insight and certainty
The project produced a detailed 3D model showing construction site basements, heating pipes, and other cables and pipes. All underground structures are presented in a single, cohesive view.
This model supports planning, design, and implementation, and prevents excavation damage, delays, and failure costs.
Value for the future
projects in complex situations
This pilot project demonstrates that even in complex inner-city environments, underground structures can be reliably mapped from ground level. The use of 3D ground-penetrating radar, supplemented by other techniques, makes it possible to work with greater certainty and fewer surprises.
For municipalities, utility operators, and contractors, this means safer work, fewer delays, and better-informed decisions. From assumptions to certainty.
View here
The Results
Want to know more?
Would you like to learn more, or are you curious about what we can do for you? Feel free to contact us—we’d be happy to tell you more!