{"id":8773,"date":"2023-03-27T21:07:35","date_gmt":"2023-03-27T21:07:35","guid":{"rendered":"https:\/\/www.reinforcedearth.ca\/?page_id=8773"},"modified":"2023-12-01T02:42:33","modified_gmt":"2023-12-01T02:42:33","slug":"techspan","status":"publish","type":"page","link":"https:\/\/www.reinforcedearth.ca\/products\/culverts\/techspan\/","title":{"rendered":"TechSpan\u00ae"},"content":{"rendered":"
This solution provides builders with a state-of-the-art three hinge precast concrete arch system for building short span earth-overfilled bridging structures. It is used for bridge, waterway, and precast concrete tunnel applications. TechSpan\u00ae\u202f precast arch culverts provide all the benefits of precast concrete structures plus a number of advantages over typical culvert, bridge, and arch systems.\u00a0<\/p>\n<\/div><\/div><\/div>
\u21d3 Design Your Own Arch \u21d3<\/span><\/p>\n<\/div> Now a matured choice for engineers, TechSpan\u00ae precast concrete tunnels are used in many applications:<\/p>\n TechSpan\u00ae precast arch culverts provide the ideal solution for short span bridging with precast concrete segments that offer rapid and safe installation, without the need for scaffolding. TechSpan\u00ae provides a long service life structure with superior seismic qualities and low maintenance requirements. Advanced design procedures and fabrication capabilities allow for the use of these precast arch structures in high-load applications usually not suitable for traditional systems.\u00a0<\/p>\n When designing the state-of-the-art design methods accurately define the radius of curvature of the arch to minimize tensile stresses and to ensure maximum strength. Our unique precasting methods produce structures that can handle any geometric design or clearance box. Our economical way of using concrete and reinforcing steel provides maximum safety at the lowest possible cost with long service life.<\/p>\n RECo engineers conduct a custom finite element model (FEM) analysis design to accurately define the optimum radius of curvature for an arch based on the project specific span length, soil coverage and construction sequencing requirements. This design produces the most efficient and economical sections. Even though the TechSpan\u00ae solution is sophisticated in terms of design, it is simple for planners and builders to incorporate into their projects. These structures are designed to accommodate high fills, heavy live loads, as well as alternating loading conditions imposed during both installation and in service conditions.<\/p>\n We use our unique flexible formwork and quality-controlled casting process to produce finished elements that comply with a wide variety of geometric and material quality specifications.<\/p>\n Our design and material supply package often includes materials required to construct the necessary retaining structures for wing walls and head walls, and also other precast solutions including footings, copings, and barriers.<\/p>\n Speed of installation of TechSpan\u00ae precast concrete arches greatly reduces the overall construction costs. Requiring only a narrow footprint to build, TechSpan\u00ae installation is simple, rapid and efficient requiring only a small work crew, light tools and conventional equipment. Erection rates of 10 to 20 linear meters of TechSpan\u00ae arch per day are easily possible with only a single crane with an operator and a small work crew.\u00a0<\/p>\n The TechSpan\u00ae precast concrete tunnels solution eliminates the need for intensive onsite formwork, scaffolding, joints, or bearings. Installation on existing roadways, railways, waterways, and conveyance systems is possible without disruption to the ongoing activity. The proof of the effectiveness of TechSpan\u00ae is a successful experience: since 1989 over 1500 installations of custom designed TechSpan\u00ae structures have been placed in service for highways, railroads, industry, and other uses in the world.<\/p>\n TechSpan\u00ae precast arch culverts construction starts with the installation of cast-in-place or precast footings on both sides. The arch units are set along the footing keyway in a staggered pattern. After the third unit is set, the arches are self-supported during the remainder of construction. Geotextile or geomembrane is applied to the joints as designed. The crown beam is cast along the top of the arch. MSE headwalls or wing walls are then installed as design guidelines and specifications.\u00a0<\/p>\nApplications of TechSpan\u00ae precast concrete arches<\/h2>\n
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Optimized design procedure<\/h2>\n
Optimized manufacturing processes<\/h2>\n
Optimized installation procedures<\/h2>\n