TechSpan precast arches, a versatile solution for durable infrastructure
TechSpan, Geoquest’s signature precast arch solution, delivers unmatched versatility and performance for buried structures across a wide range of civil and environmental application. Engineered for strength, resilience, and durability, TechSpan offers a modular, precast solution that adapts to the challenges of modern infrastructure. Whether you are building a cut-and-cover tunnel, a buried bridge, or designing for resilient flood control, TechSpan provides the flexibility to meet demanding specifications with ease.
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Why choose TechSpan?

  • Custom geometry optimized to each site and load condition,

  • Accelerated installation with precast segments and minimal on-site formwork,

  • Reduced excavation and backfill, minimizing environmental and community impact,

  • Long design life with minimal requirements,

  • Engineered resilience for live loads, hydraulic forces, and seismic activity.

Applications of TechSpan precast arches

Cut-and-cover tunnels

TechSpan is ideal for cut-and-cover tunnel construction where speed and safety are critical. Its modular design allows for fast installation in confined urban or environmentally sensitive areas, reducing disruption to traffic, communities, or ecosystems.
Whether for roadways, rail corridors, or mining hauling or conveyors, TechSpan provides a robust tunnel shell that simplifies waterproofing and backfilling operations.

Flood control and hydraulic applications

TechSpan excels in flood-prone environments, offering engineered resilience in culverts, stream crossings, and river conveyance structures. With high flow capacity and customizable openings, it provides a strong, low-profile solution that withstands hydraulic forces while blending into the natural landscape.
Paired with erosion control or formed concrete mattresses, TechSpan structures support integrated flood mitigation strategies.

Buried bridge structures

When conventional bridge decks aren’t practical or cost-effective, buried arch bridges using TechSpan provide an efficient alternative. These structures are especially suited to crossings with high fill embankments or where a visually unobtrusive solution is preferred.
TechSpan arches distribute loads naturally through soil-structure interaction, allowing for longer service life and reduced long-term maintenance compared to traditional bridges.

Smarter design starts here

TechSpan precast arches are more than just structures, they are a proven solution for sustainable, efficient, and adaptable infrastructure. Backed by our engineering expertise and supported by our online preliminary design tools, getting started has never been easier.

Ready to lauch your project ?

Use our online tool to design your TechSpan solution, visualize it in 3D, and download CAD-ready files, all in minutes.
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