Terre Armée has developed several solutions to design and build large precast concrete box bridge structures. Our customized solutions are recognized by owners, engineers and builders alike.

The TechBox™ innovation

This Terre Armée solution satisfies our customers’ need for a speedy and durable alternative to building large cast-in-place standalone or multi-cell box culvert alternatives. TechBox™ is ideally suited to having clearance envelops of ≥ 5m x 3m.

MSE Wall alternative for box-bridges

The versatility of Reinforced Earth® MSE walls lends itself to building box bridges. These walls are often designed in similar fashion to road and rail bridge abutments with adjoining MSE wing walls to form box bridge structures.

TechWall™ and T-Wall® alternative for box-bridges

In some circumstances involving very wide span openings, a custom designed TechWall™ counterfort wall or T-Wall® solution may be adapted to create a box bridge, typically requiring long-span over-bridging elements.

Architectural finish

We have a wide array of architectural finish options available, allowing architects to customize structures and to specify facing elements with an attractive rendering.

Related solutions



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.



A precast retaining wall system, TechWall™ combines the advantages of counterfort with the quality and effectiveness of precast concrete. A great fit for sites with soil bearing capacities allowing for shallow foundations, TechWall™ can also be combined with piling solutions to accommodate different types of soil. Sustainable, cost-effective, and quick to install, TechWall™ may just be the ideal solution for your project needs.



T-Wall® is a precast modular concrete “T”-shaped gravity wall. The solution is perfectly adapted to support heavy dynamic loads, and presents many benefits such as requiring an overall lower backfill volume as compared to other modular wall alternatives.

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