Geoquest offers engineered solutions for tunnels and underground structure applications.

Buried concrete arches and box tunnels

For more than 30 years, our teams have designed and supplied precast concrete arch tunnels for different types of sectors and clients. Our solutions allow for a predictable and economic means for constructing backfilled tunnels. Our solutions deliver a very competitive alternative for the construction of cut and fill tunnels, bridges and underpasses, and are often used efficiently in combination with Geoquest retaining walls.

Building underground industrial and utility tunnels (possibly move to mining page)

Reclaim and conveyance tunnels have long been considered as critical structures facilitating mining and manufacturing operations while ensuring safety for the workers on site. Precast arch tunnels have proven to be an excellent solution for the construction of material reclaim and conveyance tunnels and utility and pipeline enclosure tunnels. //

Design value and global expertise

Finite Element Method (FEM) design is used by our engineers to accurately calculate the optimal radius of curvature of the arch to minimise tensile stresses for the creation of a highly durable and resilient, axially compressed structure. Through FEM analysis, concrete and reinforcement volumes are optimised to result in the most cost-effective solution.

At Geoquest, our teams have designed and furnished materials for buried tunnels for major rail, road, industrial, military and energy projects since 1989 in more than 30 countries.

Related solutions

TechSpan®

TechSpan®

Resulting from decades of research and development, TechSpan® is a buried precast concrete arch system designed to accommodate high fills, heavy live loads, and alternating loading conditions. With a small footprint and easy and quick to install, TechSpan® is ideal for mining, industrial, and railway applications, it is gaining popularity in many different markets. See the many uses of our precast arch system.

TechBox™

TechBox™

TechBox™ consists of precast box elements used to build a structure under backfill. It allows rapid on-site regulated installation. The soil cover required in TechBox™ structures is lower than for arch structures.

Reinforced Earth®

Reinforced Earth®

Our flagship technique, Reinforced Earth®, is based on the principle of the friction between soil and reinforcements creating a permanent and predictable bond. At the origin of all mechanically stabilized earth (MSE) walls on the market today, we are continuously perfecting this ingenious technique.

“I have worked with Geoquest on two previous projects and both times have exceeded my expectation. I find the product easy to work with, quick for construction and a good final product, looking the part. There is a good turn around time from the Geoquest team and always have answered any queries I have had. I would definitely use them again.”

Patrick Goodwin, Section Engineer, Graham Construction

“Excellent Service, system and simple to build – would always recommend”

J Millar, Project Manager, Osborne Infrastructure

“The design and materials supplied by Geoquest for the new Velindre Cancer Centre bridge was excellent, providing a high-quality product at a competitive price. The technical assistance with both the design and installation was highly commendable leading to a very high standard structure upon completion.

We would thoroughly recommend Geoquest for any retained earth projects and will recommend early engagement on future projects to utilise their vast technical knowledge for value engineering.”

Tom Morris, Project Manager, Walters

“Having used Geoquest for the provision of a reinforced earth wall system on a new highway scheme I found them to be very helpful and easy to work with in the run up to construction and also throughout the construction. The quality of the final product was very good and looks well now that the work is complete and open to traffic.”

Dave Mantle, Senior Site Manager, Octavius

“Osborne Infrastructure selected Geoquest due to their reputation and expertise. They delivered on both. They provided both the design and the fabrication of the reinforced earth abutments for the M27 Romsey Road bridge on time and within budget. Design changes due to unforeseen site conditions were dealt with efficiently with expert advice on hand to ensure we produced the right solution for our client Highways England.

I would be more than happy to recommend Geoquest and would make them my go to specialist for this type of work.”

M Whale, Senior Site Manager, Osborne Infrastructure

Engineering expertise and 120 years or more of service life

Geoquest offers unrivalled engineering expertise to provide you with the best design and supply package, coupled to commercial excellence that will make your next road development project a success.

Guaranteeing long-term life duration and minimum necessity for maintenance of the infrastructure is of outmost importance, and our designs are optimised based on the service life that is required.

Sectors

From transport to military, discover the sectors we support

Applications

Discover our library of applications and techniques

Solutions

See our solutions catalog, all you need for your project needs

Projects

Browse our portfolio of completed projects from the last 50 years

Speak to our team about your next project

 


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