TechBox, a state-of-the-art solution for building large box bridges, culverts and rockfall protection shelters.
TechBox is an engineered site-specific solution for building robust “box-type” bridging of single or multi-span underpasses, small bridges and cut-and-cover passageways.
Building large box structures efficiently
Structural design optimization for durability and safety
Logistical and installation constraints
These structures are built using precision-made segmental precast concrete sections that are assembled at the jobsite. The use of pre-engineered forming moulds, quality-controlled manufacturing, and pre-planned installation procedures reduce jobsite work duration. The TechBox solution results in quicker, safer and more efficient completion at the jobsite as compared with the unpredictable nature of cast-in-place alternatives.
Applications
- Roadway and railway underpasses and overpasses
- Cut-and-cover tunnels of all types
- Large culverts
- Waterway channeling
- Rockfall protection shelters
Manufacturing
Geoquest engineers and project managers are specialists in developing, manufacturing, handling and delivery procedures for precast concrete solutions on a worldwide basis. Precasting operations are performed in a quality-controlled plant environment, either offsite requiring transport, or performed at the jobsite.
Our engineers will normally manage the design and fabrication of the specific precast forming moulds to precisely match with the optimized design of the TechBox sections. We analyze the project site conditions, schedule constraints, working crew sizes, and availability of equipment, among other factors when developing the manufacturing activity sequence.
Installation
The units required to assemble a TechBox bridging section normally consist of three precast segmental units: two full-height side wall units and a roof slab unit. The full-height side walls closely resemble our TechWall solution, although modified to include side stitch beams. The general steps for constructing TechBox include:
- Installation of full-height side wall units
- Placement of top “roof” slab units
- Casting or connecting the base slab
- Application of waterproofing, joint protection
- Staged backfilling up to the stitch level
- Casting of the side and top stitch beams
- Completion of backfilling and finishing
Since earth retaining structures are normally required for wing walls or spandrels, these are often built using Reinforced Earth, TechWall, T-Wall or other retaining wall solutions designed and furnished by Geoquest and our subsidiaries.
Our solutions allows:
Durable
Due to its characteristics coupled with world-class engineering expertise, TechBox has proven to be a very durable solution.
Jobsite safety
Using precast sections make it easier to organize safety at the jobsites through pre-planning and standardized procedures.
Decades of precasting experience
Geoquest has been operating and managing major precast concrete plant operations and concrete forming mold fabrication worldwide for nearly 50 years.
Our solutions suit severall applications to: RetainCrossProtectStrengthen
